/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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:26:37,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:26:37,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:26:37,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:26:37,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:26:37,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:26:37,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:26:37,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:26:37,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:26:37,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:26:37,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:26:37,918 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:26:37,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:26:37,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:26:37,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:26:37,920 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:26:37,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:26:37,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:26:37,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:26:37,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:26:37,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:26:37,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:26:37,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:26:37,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:26:37,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:26:37,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:26:37,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:26:37,922 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:26:37,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:26:37,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:26:38,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:26:38,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:26:38,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:26:38,230 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:26:38,231 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:26:38,232 INFO L432 ainManager$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 [2021-06-05 22:26:38,232 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-06-05 22:26:38,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:26:38,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:26:38,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:26:38,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:26:38,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:26:38,270 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 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,276 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 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:26:38,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:26:38,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:26:38,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:26:38,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... [2021-06-05 22:26:38,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:26:38,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:26:38,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:26:38,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:26:38,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:26:38,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:26:38,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:26:38,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:26:38,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:26:38,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:26:38,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:26:38,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:26:38,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:26:38,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:26:38,365 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:26:38,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:26:38,565 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:26:38,566 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:26:38 BoogieIcfgContainer [2021-06-05 22:26:38,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:26:38,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:26:38,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:26:38,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:26:38,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:38" (1/2) ... [2021-06-05 22:26:38,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354ba184 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:26:38, skipping insertion in model container [2021-06-05 22:26:38,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:26:38" (2/2) ... [2021-06-05 22:26:38,576 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-06-05 22:26:38,581 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:26:38,582 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:26:38,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:26:38,583 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:26:38,663 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 22:26:38,689 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:26:38,716 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:26:38,716 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:26:38,716 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:26:38,716 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:26:38,717 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:26:38,717 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:26:38,717 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:26:38,717 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:26:38,734 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-06-05 22:26:38,752 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) [2021-06-05 22:26:38,755 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) [2021-06-05 22:26:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 22:26:38,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:38,764 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:38,764 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-06-05 22:26:38,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:38,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960231423] [2021-06-05 22:26:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:38,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:38,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960231423] [2021-06-05 22:26:38,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960231423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:38,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:38,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:26:38,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692258149] [2021-06-05 22:26:38,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:26:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:38,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:26:38,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:38,927 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) [2021-06-05 22:26:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:38,986 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-06-05 22:26:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:26:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 22:26:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:38,997 INFO L225 Difference]: With dead ends: 134 [2021-06-05 22:26:38,997 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 22:26:38,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 22:26:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-06-05 22:26:39,048 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) [2021-06-05 22:26:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-06-05 22:26:39,053 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-06-05 22:26:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:39,053 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-06-05 22:26:39,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-06-05 22:26:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:26:39,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:39,057 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:39,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:26:39,058 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1655401882, now seen corresponding path program 1 times [2021-06-05 22:26:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:39,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470336431] [2021-06-05 22:26:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:39,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470336431] [2021-06-05 22:26:39,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470336431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:39,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262011943] [2021-06-05 22:26:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:26:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262011943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:39,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:39,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 22:26:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767198324] [2021-06-05 22:26:39,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:39,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:39,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:39,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:39,240 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) [2021-06-05 22:26:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:39,285 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-06-05 22:26:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:39,286 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 [2021-06-05 22:26:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:39,287 INFO L225 Difference]: With dead ends: 169 [2021-06-05 22:26:39,287 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 22:26:39,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 22:26:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-06-05 22:26:39,296 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) [2021-06-05 22:26:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 22:26:39,297 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-06-05 22:26:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:39,297 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 22:26:39,298 INFO L483 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) [2021-06-05 22:26:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 22:26:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:26:39,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:39,299 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:39,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 22:26:39,524 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-06-05 22:26:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:39,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601936311] [2021-06-05 22:26:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:39,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601936311] [2021-06-05 22:26:39,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601936311] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:39,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:39,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:26:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328806044] [2021-06-05 22:26:39,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:39,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:39,569 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) [2021-06-05 22:26:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:39,639 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-06-05 22:26:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:39,639 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 [2021-06-05 22:26:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:39,641 INFO L225 Difference]: With dead ends: 188 [2021-06-05 22:26:39,641 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 22:26:39,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 22:26:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-06-05 22:26:39,650 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) [2021-06-05 22:26:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-06-05 22:26:39,651 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-06-05 22:26:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:39,651 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-06-05 22:26:39,651 INFO L483 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) [2021-06-05 22:26:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-06-05 22:26:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:26:39,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:39,653 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:39,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:26:39,653 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:39,654 INFO L82 PathProgramCache]: Analyzing trace with hash 798457899, now seen corresponding path program 2 times [2021-06-05 22:26:39,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:39,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835292230] [2021-06-05 22:26:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:39,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835292230] [2021-06-05 22:26:39,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835292230] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:39,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:39,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:26:39,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806375455] [2021-06-05 22:26:39,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:39,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:39,683 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) [2021-06-05 22:26:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:39,716 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-06-05 22:26:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:39,716 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 [2021-06-05 22:26:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:39,717 INFO L225 Difference]: With dead ends: 156 [2021-06-05 22:26:39,717 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 22:26:39,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 22:26:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-06-05 22:26:39,724 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) [2021-06-05 22:26:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-05 22:26:39,725 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-06-05 22:26:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:39,725 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-05 22:26:39,725 INFO L483 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) [2021-06-05 22:26:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-05 22:26:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:26:39,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:39,727 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:39,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:26:39,727 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-06-05 22:26:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:39,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577421129] [2021-06-05 22:26:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:39,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577421129] [2021-06-05 22:26:39,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577421129] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:39,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:39,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:26:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233367142] [2021-06-05 22:26:39,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:39,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:39,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:39,753 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) [2021-06-05 22:26:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:39,817 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-06-05 22:26:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:39,818 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 [2021-06-05 22:26:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:39,819 INFO L225 Difference]: With dead ends: 156 [2021-06-05 22:26:39,819 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 22:26:39,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 22:26:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-06-05 22:26:39,827 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) [2021-06-05 22:26:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-06-05 22:26:39,828 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-06-05 22:26:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:39,828 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-06-05 22:26:39,828 INFO L483 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) [2021-06-05 22:26:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-06-05 22:26:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:26:39,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:39,830 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:39,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:26:39,830 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1060614677, now seen corresponding path program 1 times [2021-06-05 22:26:39,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:39,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464074777] [2021-06-05 22:26:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:39,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464074777] [2021-06-05 22:26:39,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464074777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476473299] [2021-06-05 22:26:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:26:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:40,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476473299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:40,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:40,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 22:26:40,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558534299] [2021-06-05 22:26:40,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:26:40,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:40,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:26:40,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:26:40,109 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) [2021-06-05 22:26:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:40,248 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-06-05 22:26:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:26:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:26:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:40,251 INFO L225 Difference]: With dead ends: 226 [2021-06-05 22:26:40,251 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 22:26:40,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:26:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 22:26:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-06-05 22:26:40,267 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) [2021-06-05 22:26:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-06-05 22:26:40,268 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-06-05 22:26:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:40,269 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-06-05 22:26:40,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-06-05 22:26:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:26:40,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:40,270 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:40,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:40,485 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1348728101, now seen corresponding path program 2 times [2021-06-05 22:26:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:40,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915818369] [2021-06-05 22:26:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:40,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:40,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915818369] [2021-06-05 22:26:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915818369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:40,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:40,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:26:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330126694] [2021-06-05 22:26:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:40,522 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) [2021-06-05 22:26:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:40,533 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-06-05 22:26:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:26:40,534 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 [2021-06-05 22:26:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:40,535 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:26:40,535 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 22:26:40,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 22:26:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-06-05 22:26:40,559 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) [2021-06-05 22:26:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-06-05 22:26:40,560 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-06-05 22:26:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:40,560 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-06-05 22:26:40,560 INFO L483 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) [2021-06-05 22:26:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-06-05 22:26:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:26:40,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:40,562 INFO L554 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] [2021-06-05 22:26:40,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:26:40,562 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash -505952581, now seen corresponding path program 1 times [2021-06-05 22:26:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:40,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336215368] [2021-06-05 22:26:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:40,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336215368] [2021-06-05 22:26:40,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336215368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694820327] [2021-06-05 22:26:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:26:40,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:40,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694820327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:40,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:40,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501018656] [2021-06-05 22:26:40,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:40,736 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) [2021-06-05 22:26:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:40,803 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-06-05 22:26:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:40,803 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 [2021-06-05 22:26:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:40,806 INFO L225 Difference]: With dead ends: 562 [2021-06-05 22:26:40,806 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 22:26:40,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 22:26:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-06-05 22:26:40,821 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) [2021-06-05 22:26:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-06-05 22:26:40,822 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-06-05 22:26:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:40,823 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-06-05 22:26:40,823 INFO L483 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) [2021-06-05 22:26:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-06-05 22:26:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:26:40,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:40,829 INFO L554 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] [2021-06-05 22:26:41,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:41,045 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1335579773, now seen corresponding path program 2 times [2021-06-05 22:26:41,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007489166] [2021-06-05 22:26:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:41,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007489166] [2021-06-05 22:26:41,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007489166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466636393] [2021-06-05 22:26:41,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:41,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:41,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:41,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:26:41,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:41,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466636393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:41,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:41,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:41,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137259293] [2021-06-05 22:26:41,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:41,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:41,174 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) [2021-06-05 22:26:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:41,233 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-06-05 22:26:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:41,233 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 [2021-06-05 22:26:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:41,235 INFO L225 Difference]: With dead ends: 491 [2021-06-05 22:26:41,235 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:26:41,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:26:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-06-05 22:26:41,247 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) [2021-06-05 22:26:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-06-05 22:26:41,249 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-06-05 22:26:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:41,249 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-06-05 22:26:41,249 INFO L483 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) [2021-06-05 22:26:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-06-05 22:26:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:26:41,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,250 INFO L554 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] [2021-06-05 22:26:41,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:41,464 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1641841895, now seen corresponding path program 3 times [2021-06-05 22:26:41,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853262908] [2021-06-05 22:26:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:41,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853262908] [2021-06-05 22:26:41,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853262908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:41,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733549913] [2021-06-05 22:26:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:41,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:26:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:26:41,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733549913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:41,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:41,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:41,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539512690] [2021-06-05 22:26:41,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:41,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:41,615 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) [2021-06-05 22:26:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:41,672 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-06-05 22:26:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:41,672 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 [2021-06-05 22:26:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:41,677 INFO L225 Difference]: With dead ends: 771 [2021-06-05 22:26:41,677 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 22:26:41,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 22:26:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-06-05 22:26:41,717 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) [2021-06-05 22:26:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-06-05 22:26:41,721 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-06-05 22:26:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:41,721 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-06-05 22:26:41,721 INFO L483 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) [2021-06-05 22:26:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-06-05 22:26:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:26:41,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,724 INFO L554 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] [2021-06-05 22:26:41,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:26:41,947 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1483069401, now seen corresponding path program 4 times [2021-06-05 22:26:41,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732338979] [2021-06-05 22:26:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:41,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732338979] [2021-06-05 22:26:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732338979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528865401] [2021-06-05 22:26:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:42,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:42,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:26:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:42,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528865401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:42,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:42,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:42,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840935716] [2021-06-05 22:26:42,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:42,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:42,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:42,111 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) [2021-06-05 22:26:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:42,161 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-06-05 22:26:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:42,162 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 [2021-06-05 22:26:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:42,165 INFO L225 Difference]: With dead ends: 763 [2021-06-05 22:26:42,165 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 22:26:42,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:42,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 22:26:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-06-05 22:26:42,183 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) [2021-06-05 22:26:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-06-05 22:26:42,185 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-06-05 22:26:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:42,186 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-06-05 22:26:42,186 INFO L483 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) [2021-06-05 22:26:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-06-05 22:26:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:26:42,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:42,187 INFO L554 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] [2021-06-05 22:26:42,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:42,409 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:42,409 INFO L82 PathProgramCache]: Analyzing trace with hash 275158029, now seen corresponding path program 5 times [2021-06-05 22:26:42,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:42,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814800270] [2021-06-05 22:26:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:42,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814800270] [2021-06-05 22:26:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814800270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500661008] [2021-06-05 22:26:42,446 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:42,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:26:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:26:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:42,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500661008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:42,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821017453] [2021-06-05 22:26:42,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:42,541 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) [2021-06-05 22:26:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:42,615 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-06-05 22:26:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:42,615 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 [2021-06-05 22:26:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:42,618 INFO L225 Difference]: With dead ends: 741 [2021-06-05 22:26:42,618 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 22:26:42,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 22:26:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-06-05 22:26:42,631 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) [2021-06-05 22:26:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-06-05 22:26:42,633 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-06-05 22:26:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:42,634 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-06-05 22:26:42,634 INFO L483 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) [2021-06-05 22:26:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-06-05 22:26:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:42,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:42,635 INFO L554 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] [2021-06-05 22:26:42,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:42,849 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 590448310, now seen corresponding path program 6 times [2021-06-05 22:26:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:42,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712622317] [2021-06-05 22:26:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:26:42,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712622317] [2021-06-05 22:26:42,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712622317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:42,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:42,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:26:42,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107132732] [2021-06-05 22:26:42,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:42,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:42,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:42,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:42,880 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) [2021-06-05 22:26:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:42,895 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-06-05 22:26:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:26:42,895 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 [2021-06-05 22:26:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:42,899 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 22:26:42,899 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 22:26:42,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 22:26:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-06-05 22:26:42,917 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) [2021-06-05 22:26:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-06-05 22:26:42,921 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-06-05 22:26:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:42,921 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-06-05 22:26:42,921 INFO L483 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) [2021-06-05 22:26:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-06-05 22:26:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:42,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:42,923 INFO L554 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] [2021-06-05 22:26:42,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 22:26:42,923 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 655092438, now seen corresponding path program 1 times [2021-06-05 22:26:42,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:42,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747204369] [2021-06-05 22:26:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:42,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:42,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747204369] [2021-06-05 22:26:42,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747204369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:42,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983712820] [2021-06-05 22:26:42,965 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:43,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983712820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:43,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398676408] [2021-06-05 22:26:43,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:43,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:43,070 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) [2021-06-05 22:26:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:43,104 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-06-05 22:26:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:43,105 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 [2021-06-05 22:26:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:43,111 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 22:26:43,111 INFO L226 Difference]: Without dead ends: 1715 [2021-06-05 22:26:43,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-05 22:26:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-06-05 22:26:43,142 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) [2021-06-05 22:26:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-06-05 22:26:43,147 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-06-05 22:26:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:43,147 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-06-05 22:26:43,147 INFO L483 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) [2021-06-05 22:26:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-06-05 22:26:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:43,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:43,150 INFO L554 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] [2021-06-05 22:26:43,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:26:43,373 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1389409942, now seen corresponding path program 2 times [2021-06-05 22:26:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:43,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035352598] [2021-06-05 22:26:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:43,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:43,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035352598] [2021-06-05 22:26:43,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035352598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664074384] [2021-06-05 22:26:43,418 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 [2021-06-05 22:26:43,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:43,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:43,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664074384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:43,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389222654] [2021-06-05 22:26:43,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:43,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:43,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:43,549 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) [2021-06-05 22:26:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:43,608 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-06-05 22:26:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:43,609 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 [2021-06-05 22:26:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:43,618 INFO L225 Difference]: With dead ends: 2696 [2021-06-05 22:26:43,618 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 22:26:43,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 22:26:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-06-05 22:26:43,680 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) [2021-06-05 22:26:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-06-05 22:26:43,689 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-06-05 22:26:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:43,689 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-06-05 22:26:43,689 INFO L483 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) [2021-06-05 22:26:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-06-05 22:26:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:43,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:43,696 INFO L554 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] [2021-06-05 22:26:43,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:26:43,909 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1015199406, now seen corresponding path program 3 times [2021-06-05 22:26:43,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:43,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087967464] [2021-06-05 22:26:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:43,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:43,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087967464] [2021-06-05 22:26:43,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087967464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631032492] [2021-06-05 22:26:43,969 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 [2021-06-05 22:26:44,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:26:44,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:44,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:44,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631032492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:44,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:44,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549911891] [2021-06-05 22:26:44,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:44,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,097 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) [2021-06-05 22:26:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:44,171 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-06-05 22:26:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:26:44,171 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 [2021-06-05 22:26:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:44,189 INFO L225 Difference]: With dead ends: 4261 [2021-06-05 22:26:44,190 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 22:26:44,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 22:26:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-06-05 22:26:44,262 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) [2021-06-05 22:26:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-06-05 22:26:44,271 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-06-05 22:26:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:44,271 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-06-05 22:26:44,272 INFO L483 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) [2021-06-05 22:26:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-06-05 22:26:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:44,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:44,277 INFO L554 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] [2021-06-05 22:26:44,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:26:44,500 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2091115922, now seen corresponding path program 4 times [2021-06-05 22:26:44,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:44,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478433953] [2021-06-05 22:26:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:44,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:44,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478433953] [2021-06-05 22:26:44,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478433953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014532547] [2021-06-05 22:26:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:44,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:44,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:44,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:44,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014532547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:44,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489293679] [2021-06-05 22:26:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,635 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) [2021-06-05 22:26:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:44,690 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-06-05 22:26:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:26:44,690 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 [2021-06-05 22:26:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:44,704 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 22:26:44,704 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 22:26:44,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 22:26:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-06-05 22:26:44,771 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) [2021-06-05 22:26:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-06-05 22:26:44,781 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-06-05 22:26:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:44,781 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-06-05 22:26:44,781 INFO L483 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) [2021-06-05 22:26:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-06-05 22:26:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:44,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:44,787 INFO L554 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] [2021-06-05 22:26:45,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:26:45,002 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-06-05 22:26:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:45,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931822879] [2021-06-05 22:26:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:45,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931822879] [2021-06-05 22:26:45,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931822879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692364247] [2021-06-05 22:26:45,038 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 [2021-06-05 22:26:45,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:26:45,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:45,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:45,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692364247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:45,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216148062] [2021-06-05 22:26:45,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:45,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:45,143 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) [2021-06-05 22:26:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:45,187 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-06-05 22:26:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:45,187 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 [2021-06-05 22:26:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:45,211 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 22:26:45,211 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 22:26:45,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 22:26:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-06-05 22:26:45,289 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) [2021-06-05 22:26:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-06-05 22:26:45,299 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-06-05 22:26:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:45,299 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-06-05 22:26:45,299 INFO L483 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) [2021-06-05 22:26:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-06-05 22:26:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:45,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:45,305 INFO L554 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] [2021-06-05 22:26:45,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:26:45,526 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-06-05 22:26:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:45,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733044940] [2021-06-05 22:26:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:45,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:45,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733044940] [2021-06-05 22:26:45,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733044940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407662650] [2021-06-05 22:26:45,569 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:45,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:26:45,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:45,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407662650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:45,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712748084] [2021-06-05 22:26:45,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:45,672 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) [2021-06-05 22:26:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:45,731 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-06-05 22:26:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:26:45,732 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 [2021-06-05 22:26:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:45,742 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 22:26:45,742 INFO L226 Difference]: Without dead ends: 5329 [2021-06-05 22:26:45,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-05 22:26:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-06-05 22:26:45,826 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) [2021-06-05 22:26:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-06-05 22:26:45,837 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-06-05 22:26:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:45,837 INFO L482 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-06-05 22:26:45,838 INFO L483 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) [2021-06-05 22:26:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-06-05 22:26:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:26:45,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:45,845 INFO L554 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] [2021-06-05 22:26:46,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:46,061 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-06-05 22:26:46,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:46,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488670868] [2021-06-05 22:26:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:46,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488670868] [2021-06-05 22:26:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488670868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142855675] [2021-06-05 22:26:46,108 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 [2021-06-05 22:26:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:46,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142855675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:46,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:46,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116593953] [2021-06-05 22:26:46,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:46,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:46,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:46,213 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) [2021-06-05 22:26:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:46,277 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-06-05 22:26:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:26:46,277 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 [2021-06-05 22:26:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:46,286 INFO L225 Difference]: With dead ends: 5419 [2021-06-05 22:26:46,286 INFO L226 Difference]: Without dead ends: 5400 [2021-06-05 22:26:46,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-05 22:26:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-06-05 22:26:46,339 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) [2021-06-05 22:26:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-06-05 22:26:46,346 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-06-05 22:26:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:46,346 INFO L482 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-06-05 22:26:46,346 INFO L483 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) [2021-06-05 22:26:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-06-05 22:26:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:46,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:46,351 INFO L554 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] [2021-06-05 22:26:46,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:46,565 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 467136390, now seen corresponding path program 8 times [2021-06-05 22:26:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:46,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531967215] [2021-06-05 22:26:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:46,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531967215] [2021-06-05 22:26:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531967215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026612509] [2021-06-05 22:26:46,611 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 [2021-06-05 22:26:46,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:46,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:46,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026612509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:46,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109137283] [2021-06-05 22:26:46,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:46,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:46,716 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) [2021-06-05 22:26:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:46,838 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-06-05 22:26:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:46,839 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 [2021-06-05 22:26:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:46,847 INFO L225 Difference]: With dead ends: 5635 [2021-06-05 22:26:46,847 INFO L226 Difference]: Without dead ends: 5635 [2021-06-05 22:26:46,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:26:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-06-05 22:26:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-06-05 22:26:46,911 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) [2021-06-05 22:26:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-06-05 22:26:46,918 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-06-05 22:26:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:46,918 INFO L482 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-06-05 22:26:46,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-06-05 22:26:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:46,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:46,925 INFO L554 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] [2021-06-05 22:26:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:26:47,148 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1694057605, now seen corresponding path program 9 times [2021-06-05 22:26:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433799499] [2021-06-05 22:26:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:47,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433799499] [2021-06-05 22:26:47,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433799499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371879539] [2021-06-05 22:26:47,186 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 [2021-06-05 22:26:47,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:26:47,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371879539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697929939] [2021-06-05 22:26:47,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:47,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:47,275 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) [2021-06-05 22:26:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:47,386 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-06-05 22:26:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:26:47,387 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 [2021-06-05 22:26:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:47,396 INFO L225 Difference]: With dead ends: 7170 [2021-06-05 22:26:47,396 INFO L226 Difference]: Without dead ends: 7072 [2021-06-05 22:26:47,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:26:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-06-05 22:26:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-06-05 22:26:47,496 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) [2021-06-05 22:26:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-06-05 22:26:47,509 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-06-05 22:26:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:47,510 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-06-05 22:26:47,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-06-05 22:26:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:47,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:47,519 INFO L554 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] [2021-06-05 22:26:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:47,733 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1866861137, now seen corresponding path program 10 times [2021-06-05 22:26:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837198478] [2021-06-05 22:26:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837198478] [2021-06-05 22:26:47,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837198478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117284644] [2021-06-05 22:26:47,768 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 [2021-06-05 22:26:47,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:47,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117284644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:47,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:47,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919487336] [2021-06-05 22:26:47,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:47,871 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) [2021-06-05 22:26:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:47,956 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-06-05 22:26:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:47,956 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 [2021-06-05 22:26:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:47,964 INFO L225 Difference]: With dead ends: 6984 [2021-06-05 22:26:47,965 INFO L226 Difference]: Without dead ends: 6984 [2021-06-05 22:26:47,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-06-05 22:26:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-06-05 22:26:48,090 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) [2021-06-05 22:26:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-06-05 22:26:48,104 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-06-05 22:26:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:48,104 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-06-05 22:26:48,104 INFO L483 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) [2021-06-05 22:26:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-06-05 22:26:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:48,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:48,113 INFO L554 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] [2021-06-05 22:26:48,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:26:48,329 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1660386298, now seen corresponding path program 11 times [2021-06-05 22:26:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:48,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285296183] [2021-06-05 22:26:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:48,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:48,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285296183] [2021-06-05 22:26:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285296183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784343036] [2021-06-05 22:26:48,359 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 [2021-06-05 22:26:48,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:26:48,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:48,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784343036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:48,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:48,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139179544] [2021-06-05 22:26:48,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:48,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:48,455 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) [2021-06-05 22:26:48,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:48,533 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-06-05 22:26:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:48,534 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 [2021-06-05 22:26:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:48,541 INFO L225 Difference]: With dead ends: 7018 [2021-06-05 22:26:48,541 INFO L226 Difference]: Without dead ends: 7014 [2021-06-05 22:26:48,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-06-05 22:26:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-06-05 22:26:48,631 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) [2021-06-05 22:26:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-06-05 22:26:48,644 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-06-05 22:26:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:48,644 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-06-05 22:26:48,645 INFO L483 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) [2021-06-05 22:26:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-06-05 22:26:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:48,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:48,652 INFO L554 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] [2021-06-05 22:26:48,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 22:26:48,874 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash -542761274, now seen corresponding path program 12 times [2021-06-05 22:26:48,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:48,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514877126] [2021-06-05 22:26:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:48,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:48,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514877126] [2021-06-05 22:26:48,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514877126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951536324] [2021-06-05 22:26:48,912 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:48,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:48,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:49,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951536324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:49,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:49,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597778797] [2021-06-05 22:26:49,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:49,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:49,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:49,013 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) [2021-06-05 22:26:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:49,097 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-06-05 22:26:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:49,097 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 [2021-06-05 22:26:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:49,109 INFO L225 Difference]: With dead ends: 9612 [2021-06-05 22:26:49,109 INFO L226 Difference]: Without dead ends: 9612 [2021-06-05 22:26:49,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-06-05 22:26:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-06-05 22:26:49,280 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) [2021-06-05 22:26:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-06-05 22:26:49,298 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-06-05 22:26:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:49,299 INFO L482 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-06-05 22:26:49,299 INFO L483 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) [2021-06-05 22:26:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-06-05 22:26:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:49,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:49,308 INFO L554 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] [2021-06-05 22:26:49,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 22:26:49,532 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash 452193595, now seen corresponding path program 13 times [2021-06-05 22:26:49,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:49,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568134100] [2021-06-05 22:26:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:49,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568134100] [2021-06-05 22:26:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568134100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354821070] [2021-06-05 22:26:49,564 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 [2021-06-05 22:26:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:49,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354821070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:49,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:49,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600013898] [2021-06-05 22:26:49,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:49,659 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) [2021-06-05 22:26:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:49,754 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-06-05 22:26:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:49,755 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 [2021-06-05 22:26:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:49,766 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 22:26:49,767 INFO L226 Difference]: Without dead ends: 10193 [2021-06-05 22:26:49,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-06-05 22:26:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-06-05 22:26:49,908 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) [2021-06-05 22:26:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-06-05 22:26:49,927 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-06-05 22:26:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:49,927 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-06-05 22:26:49,927 INFO L483 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) [2021-06-05 22:26:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-06-05 22:26:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:49,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:49,936 INFO L554 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] [2021-06-05 22:26:50,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:26:50,158 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:50,158 INFO L82 PathProgramCache]: Analyzing trace with hash 756919215, now seen corresponding path program 14 times [2021-06-05 22:26:50,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:50,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639158468] [2021-06-05 22:26:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:50,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:50,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639158468] [2021-06-05 22:26:50,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639158468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569677994] [2021-06-05 22:26:50,183 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:50,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:50,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:50,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:50,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569677994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:50,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:50,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102813018] [2021-06-05 22:26:50,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:50,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:50,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:50,284 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) [2021-06-05 22:26:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:50,374 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-06-05 22:26:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:50,375 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 [2021-06-05 22:26:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:50,419 INFO L225 Difference]: With dead ends: 10439 [2021-06-05 22:26:50,420 INFO L226 Difference]: Without dead ends: 10437 [2021-06-05 22:26:50,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-06-05 22:26:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-06-05 22:26:50,548 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) [2021-06-05 22:26:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-06-05 22:26:50,568 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-06-05 22:26:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:50,568 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-06-05 22:26:50,568 INFO L483 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) [2021-06-05 22:26:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-06-05 22:26:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:50,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:50,580 INFO L554 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] [2021-06-05 22:26:50,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:26:50,797 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash 963394054, now seen corresponding path program 15 times [2021-06-05 22:26:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:50,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270040415] [2021-06-05 22:26:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:50,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270040415] [2021-06-05 22:26:50,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270040415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680610687] [2021-06-05 22:26:50,822 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 [2021-06-05 22:26:50,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:26:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:26:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:26:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680610687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:50,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 22:26:50,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114679476] [2021-06-05 22:26:50,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:26:50,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:26:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:26:50,952 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) [2021-06-05 22:26:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:51,371 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-06-05 22:26:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:26:51,371 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 [2021-06-05 22:26:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:51,394 INFO L225 Difference]: With dead ends: 16933 [2021-06-05 22:26:51,394 INFO L226 Difference]: Without dead ends: 16887 [2021-06-05 22:26:51,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:26:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-06-05 22:26:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-06-05 22:26:51,614 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) [2021-06-05 22:26:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-06-05 22:26:51,636 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-06-05 22:26:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:51,636 INFO L482 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-06-05 22:26:51,636 INFO L483 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) [2021-06-05 22:26:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-06-05 22:26:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:51,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:51,648 INFO L554 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] [2021-06-05 22:26:51,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:51,861 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1147123141, now seen corresponding path program 16 times [2021-06-05 22:26:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:51,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542642718] [2021-06-05 22:26:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:51,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:51,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542642718] [2021-06-05 22:26:51,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542642718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:51,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368533441] [2021-06-05 22:26:51,894 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 [2021-06-05 22:26:51,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:51,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:51,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368533441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:51,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:51,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:51,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607263305] [2021-06-05 22:26:51,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:51,981 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) [2021-06-05 22:26:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:52,088 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-06-05 22:26:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:52,089 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 [2021-06-05 22:26:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:52,102 INFO L225 Difference]: With dead ends: 12577 [2021-06-05 22:26:52,102 INFO L226 Difference]: Without dead ends: 12575 [2021-06-05 22:26:52,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:26:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-05 22:26:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-06-05 22:26:52,248 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) [2021-06-05 22:26:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-06-05 22:26:52,270 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-06-05 22:26:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:52,270 INFO L482 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-06-05 22:26:52,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-06-05 22:26:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:52,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:52,277 INFO L554 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] [2021-06-05 22:26:52,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:26:52,483 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:52,483 INFO L82 PathProgramCache]: Analyzing trace with hash 973386407, now seen corresponding path program 17 times [2021-06-05 22:26:52,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:52,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078987483] [2021-06-05 22:26:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:26:52,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:52,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078987483] [2021-06-05 22:26:52,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078987483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:52,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138408342] [2021-06-05 22:26:52,515 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 [2021-06-05 22:26:52,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:26:52,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:26:52,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138408342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:52,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:52,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:52,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465294688] [2021-06-05 22:26:52,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:52,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:52,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:52,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:52,666 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) [2021-06-05 22:26:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:52,773 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-06-05 22:26:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:26:52,774 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 [2021-06-05 22:26:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:52,788 INFO L225 Difference]: With dead ends: 11745 [2021-06-05 22:26:52,789 INFO L226 Difference]: Without dead ends: 11709 [2021-06-05 22:26:52,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:26:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-06-05 22:26:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-06-05 22:26:53,014 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) [2021-06-05 22:26:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-06-05 22:26:53,043 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-06-05 22:26:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:53,043 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-06-05 22:26:53,043 INFO L483 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) [2021-06-05 22:26:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-06-05 22:26:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:53,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:53,049 INFO L554 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] [2021-06-05 22:26:53,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:53,250 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:53,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1610257349, now seen corresponding path program 18 times [2021-06-05 22:26:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:53,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852451532] [2021-06-05 22:26:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:53,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852451532] [2021-06-05 22:26:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852451532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557795275] [2021-06-05 22:26:53,330 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 [2021-06-05 22:26:53,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:53,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:53,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557795275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:53,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:53,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:53,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163459971] [2021-06-05 22:26:53,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:53,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:53,431 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) [2021-06-05 22:26:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:53,561 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-06-05 22:26:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:53,562 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 [2021-06-05 22:26:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:53,578 INFO L225 Difference]: With dead ends: 13428 [2021-06-05 22:26:53,578 INFO L226 Difference]: Without dead ends: 13422 [2021-06-05 22:26:53,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-06-05 22:26:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-06-05 22:26:53,769 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) [2021-06-05 22:26:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-06-05 22:26:53,798 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-06-05 22:26:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:53,798 INFO L482 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-06-05 22:26:53,799 INFO L483 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) [2021-06-05 22:26:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-06-05 22:26:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:53,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:53,805 INFO L554 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] [2021-06-05 22:26:54,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 22:26:54,050 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1305531729, now seen corresponding path program 19 times [2021-06-05 22:26:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:54,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113927578] [2021-06-05 22:26:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:54,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113927578] [2021-06-05 22:26:54,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113927578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:54,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419242420] [2021-06-05 22:26:54,075 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 [2021-06-05 22:26:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:54,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:54,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419242420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:54,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:54,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:54,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453656301] [2021-06-05 22:26:54,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:54,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:54,154 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) [2021-06-05 22:26:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:54,253 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-06-05 22:26:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:54,253 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 [2021-06-05 22:26:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:54,271 INFO L225 Difference]: With dead ends: 13864 [2021-06-05 22:26:54,272 INFO L226 Difference]: Without dead ends: 13864 [2021-06-05 22:26:54,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-06-05 22:26:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-06-05 22:26:54,436 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) [2021-06-05 22:26:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-06-05 22:26:54,527 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-06-05 22:26:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:54,527 INFO L482 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-06-05 22:26:54,528 INFO L483 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) [2021-06-05 22:26:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-06-05 22:26:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:54,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:54,533 INFO L554 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] [2021-06-05 22:26:54,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:54,734 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:54,734 INFO L82 PathProgramCache]: Analyzing trace with hash -915327803, now seen corresponding path program 20 times [2021-06-05 22:26:54,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:54,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054179823] [2021-06-05 22:26:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:54,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:54,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054179823] [2021-06-05 22:26:54,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054179823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:54,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266276443] [2021-06-05 22:26:54,773 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 [2021-06-05 22:26:54,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266276443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:54,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:54,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484393404] [2021-06-05 22:26:54,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:54,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:54,877 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) [2021-06-05 22:26:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:55,017 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-06-05 22:26:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:26:55,018 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 [2021-06-05 22:26:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:55,136 INFO L225 Difference]: With dead ends: 14564 [2021-06-05 22:26:55,136 INFO L226 Difference]: Without dead ends: 14564 [2021-06-05 22:26:55,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:26:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-06-05 22:26:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-06-05 22:26:55,268 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) [2021-06-05 22:26:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-06-05 22:26:55,289 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-06-05 22:26:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:55,289 INFO L482 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-06-05 22:26:55,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-06-05 22:26:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:26:55,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:55,295 INFO L554 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] [2021-06-05 22:26:55,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 22:26:55,496 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash 537537127, now seen corresponding path program 21 times [2021-06-05 22:26:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:55,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292131112] [2021-06-05 22:26:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292131112] [2021-06-05 22:26:55,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292131112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:55,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980603924] [2021-06-05 22:26:55,533 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 [2021-06-05 22:26:55,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:26:55,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:55,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:26:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:55,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980603924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:55,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:55,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:55,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328608446] [2021-06-05 22:26:55,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:55,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:55,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:55,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:55,630 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) [2021-06-05 22:26:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:55,817 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-06-05 22:26:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:55,818 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 [2021-06-05 22:26:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:55,835 INFO L225 Difference]: With dead ends: 14130 [2021-06-05 22:26:55,835 INFO L226 Difference]: Without dead ends: 14130 [2021-06-05 22:26:55,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:26:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-06-05 22:26:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-06-05 22:26:55,979 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) [2021-06-05 22:26:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-06-05 22:26:55,997 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-06-05 22:26:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:55,997 INFO L482 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-06-05 22:26:55,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-06-05 22:26:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:26:56,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:56,006 INFO L554 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] [2021-06-05 22:26:56,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:56,207 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1450078555, now seen corresponding path program 22 times [2021-06-05 22:26:56,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:56,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718231348] [2021-06-05 22:26:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:56,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718231348] [2021-06-05 22:26:56,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718231348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510501898] [2021-06-05 22:26:56,259 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 [2021-06-05 22:26:56,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:26:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:56,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510501898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:56,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:56,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:26:56,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091350145] [2021-06-05 22:26:56,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:26:56,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:26:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:26:56,462 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) [2021-06-05 22:26:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:56,643 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-06-05 22:26:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:26:56,643 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 [2021-06-05 22:26:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:56,663 INFO L225 Difference]: With dead ends: 15926 [2021-06-05 22:26:56,663 INFO L226 Difference]: Without dead ends: 15926 [2021-06-05 22:26:56,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-06-05 22:26:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-06-05 22:26:56,818 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) [2021-06-05 22:26:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-06-05 22:26:56,837 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-06-05 22:26:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:56,838 INFO L482 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-06-05 22:26:56,838 INFO L483 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) [2021-06-05 22:26:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-06-05 22:26:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:26:56,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:56,850 INFO L554 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] [2021-06-05 22:26:57,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:26:57,062 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1917671971, now seen corresponding path program 23 times [2021-06-05 22:26:57,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:57,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688931677] [2021-06-05 22:26:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:57,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:57,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688931677] [2021-06-05 22:26:57,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688931677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:57,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256118990] [2021-06-05 22:26:57,094 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 [2021-06-05 22:26:57,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:26:57,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:57,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:26:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:57,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256118990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:57,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:57,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:57,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989449625] [2021-06-05 22:26:57,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:57,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:57,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:57,207 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) [2021-06-05 22:26:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:57,383 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-06-05 22:26:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:26:57,384 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 [2021-06-05 22:26:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:57,403 INFO L225 Difference]: With dead ends: 13630 [2021-06-05 22:26:57,403 INFO L226 Difference]: Without dead ends: 13622 [2021-06-05 22:26:57,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:26:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-05 22:26:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-06-05 22:26:57,609 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) [2021-06-05 22:26:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-06-05 22:26:57,632 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-06-05 22:26:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:57,632 INFO L482 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-06-05 22:26:57,632 INFO L483 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) [2021-06-05 22:26:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-06-05 22:26:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:26:57,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:57,646 INFO L554 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] [2021-06-05 22:26:57,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:57,861 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash -613294009, now seen corresponding path program 24 times [2021-06-05 22:26:57,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:57,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485509192] [2021-06-05 22:26:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:57,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:57,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485509192] [2021-06-05 22:26:57,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485509192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:57,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846030463] [2021-06-05 22:26:57,900 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 [2021-06-05 22:26:57,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:26:57,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:57,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:26:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846030463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:58,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:58,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:58,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272617837] [2021-06-05 22:26:58,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:58,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:58,015 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) [2021-06-05 22:26:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:58,144 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-06-05 22:26:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:26:58,151 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 [2021-06-05 22:26:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:58,172 INFO L225 Difference]: With dead ends: 17393 [2021-06-05 22:26:58,172 INFO L226 Difference]: Without dead ends: 17393 [2021-06-05 22:26:58,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:26:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-06-05 22:26:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-06-05 22:26:58,382 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) [2021-06-05 22:26:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-06-05 22:26:58,404 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-06-05 22:26:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:58,405 INFO L482 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-06-05 22:26:58,405 INFO L483 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) [2021-06-05 22:26:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-06-05 22:26:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:26:58,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:58,415 INFO L554 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] [2021-06-05 22:26:58,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:26:58,616 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash 556761991, now seen corresponding path program 25 times [2021-06-05 22:26:58,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:58,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951111560] [2021-06-05 22:26:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:58,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951111560] [2021-06-05 22:26:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951111560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772649836] [2021-06-05 22:26:58,647 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 [2021-06-05 22:26:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:58,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:26:58,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:58,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772649836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:58,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:58,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:58,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711226798] [2021-06-05 22:26:58,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:58,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:58,743 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) [2021-06-05 22:26:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:58,888 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-06-05 22:26:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:26:58,888 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 [2021-06-05 22:26:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:58,914 INFO L225 Difference]: With dead ends: 16911 [2021-06-05 22:26:58,914 INFO L226 Difference]: Without dead ends: 16863 [2021-06-05 22:26:58,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:26:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-06-05 22:26:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-06-05 22:26:59,133 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) [2021-06-05 22:26:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-06-05 22:26:59,153 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-06-05 22:26:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:59,153 INFO L482 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-06-05 22:26:59,153 INFO L483 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) [2021-06-05 22:26:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-06-05 22:26:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:26:59,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:59,165 INFO L554 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] [2021-06-05 22:26:59,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:26:59,366 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1979977875, now seen corresponding path program 26 times [2021-06-05 22:26:59,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:59,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658023705] [2021-06-05 22:26:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:59,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658023705] [2021-06-05 22:26:59,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658023705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840736058] [2021-06-05 22:26:59,402 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) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:59,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:59,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:26:59,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:59,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840736058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:59,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:59,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487954609] [2021-06-05 22:26:59,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:59,504 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) [2021-06-05 22:26:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:59,628 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-06-05 22:26:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:26:59,629 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 [2021-06-05 22:26:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:59,645 INFO L225 Difference]: With dead ends: 15209 [2021-06-05 22:26:59,645 INFO L226 Difference]: Without dead ends: 15137 [2021-06-05 22:26:59,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:26:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-06-05 22:26:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-06-05 22:26:59,877 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) [2021-06-05 22:26:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-06-05 22:26:59,896 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-06-05 22:26:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:59,896 INFO L482 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-06-05 22:26:59,896 INFO L483 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) [2021-06-05 22:26:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-06-05 22:26:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:26:59,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:59,905 INFO L554 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] [2021-06-05 22:27:00,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:27:00,106 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash 443374363, now seen corresponding path program 27 times [2021-06-05 22:27:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:00,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364482537] [2021-06-05 22:27:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:27:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364482537] [2021-06-05 22:27:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364482537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668222309] [2021-06-05 22:27:00,136 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 [2021-06-05 22:27:00,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:27:00,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668222309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:00,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:00,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:27:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414051727] [2021-06-05 22:27:00,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:27:00,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:27:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:00,258 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) [2021-06-05 22:27:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:00,360 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-06-05 22:27:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:27:00,361 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 [2021-06-05 22:27:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:00,379 INFO L225 Difference]: With dead ends: 18333 [2021-06-05 22:27:00,379 INFO L226 Difference]: Without dead ends: 18330 [2021-06-05 22:27:00,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-06-05 22:27:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-06-05 22:27:00,629 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) [2021-06-05 22:27:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-06-05 22:27:00,655 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-06-05 22:27:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:00,655 INFO L482 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-06-05 22:27:00,655 INFO L483 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) [2021-06-05 22:27:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-06-05 22:27:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:00,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:00,666 INFO L554 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] [2021-06-05 22:27:00,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:27:00,867 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 729697573, now seen corresponding path program 28 times [2021-06-05 22:27:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:00,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399792480] [2021-06-05 22:27:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:00,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:00,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399792480] [2021-06-05 22:27:00,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399792480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:00,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421808000] [2021-06-05 22:27:00,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:00,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:01,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421808000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:01,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:01,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:27:01,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159672579] [2021-06-05 22:27:01,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:27:01,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:01,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:27:01,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:01,024 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) [2021-06-05 22:27:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:01,135 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-06-05 22:27:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:01,135 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 [2021-06-05 22:27:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:01,156 INFO L225 Difference]: With dead ends: 20808 [2021-06-05 22:27:01,156 INFO L226 Difference]: Without dead ends: 20808 [2021-06-05 22:27:01,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-06-05 22:27:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-06-05 22:27:01,436 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) [2021-06-05 22:27:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-06-05 22:27:01,463 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-06-05 22:27:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:01,463 INFO L482 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-06-05 22:27:01,463 INFO L483 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) [2021-06-05 22:27:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-06-05 22:27:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:01,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:01,476 INFO L554 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] [2021-06-05 22:27:01,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:01,676 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1899753573, now seen corresponding path program 29 times [2021-06-05 22:27:01,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:01,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144852796] [2021-06-05 22:27:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:01,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:01,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144852796] [2021-06-05 22:27:01,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144852796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:01,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182935255] [2021-06-05 22:27:01,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:01,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:27:01,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:01,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182935255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:01,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:01,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:27:01,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592035052] [2021-06-05 22:27:01,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:27:01,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:01,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:27:01,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:01,811 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) [2021-06-05 22:27:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:01,944 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-06-05 22:27:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:01,944 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 [2021-06-05 22:27:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:01,970 INFO L225 Difference]: With dead ends: 20381 [2021-06-05 22:27:01,970 INFO L226 Difference]: Without dead ends: 20349 [2021-06-05 22:27:01,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-06-05 22:27:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-06-05 22:27:02,300 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) [2021-06-05 22:27:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-06-05 22:27:02,338 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-06-05 22:27:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:02,338 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-06-05 22:27:02,338 INFO L483 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) [2021-06-05 22:27:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-06-05 22:27:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:02,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:02,356 INFO L554 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] [2021-06-05 22:27:02,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 22:27:02,578 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash -636986293, now seen corresponding path program 30 times [2021-06-05 22:27:02,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:02,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076071953] [2021-06-05 22:27:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:02,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076071953] [2021-06-05 22:27:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076071953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811726008] [2021-06-05 22:27:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:02,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:27:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:02,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811726008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:02,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:02,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:02,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021077561] [2021-06-05 22:27:02,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:02,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:02,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:02,719 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) [2021-06-05 22:27:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:02,877 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-06-05 22:27:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:02,878 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 [2021-06-05 22:27:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:03,063 INFO L225 Difference]: With dead ends: 20409 [2021-06-05 22:27:03,063 INFO L226 Difference]: Without dead ends: 20337 [2021-06-05 22:27:03,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-06-05 22:27:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-06-05 22:27:03,291 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) [2021-06-05 22:27:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-06-05 22:27:03,319 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-06-05 22:27:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:03,319 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-06-05 22:27:03,319 INFO L483 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) [2021-06-05 22:27:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-06-05 22:27:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:03,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:03,332 INFO L554 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] [2021-06-05 22:27:03,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 22:27:03,533 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 725045157, now seen corresponding path program 31 times [2021-06-05 22:27:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299445511] [2021-06-05 22:27:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:03,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:03,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299445511] [2021-06-05 22:27:03,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299445511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:03,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103994493] [2021-06-05 22:27:03,589 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) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:03,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103994493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:03,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:03,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:03,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475973858] [2021-06-05 22:27:03,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:03,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:03,779 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) [2021-06-05 22:27:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:03,965 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-06-05 22:27:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:03,966 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 [2021-06-05 22:27:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:03,996 INFO L225 Difference]: With dead ends: 20155 [2021-06-05 22:27:03,996 INFO L226 Difference]: Without dead ends: 20027 [2021-06-05 22:27:03,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-06-05 22:27:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-06-05 22:27:04,271 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) [2021-06-05 22:27:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-06-05 22:27:04,302 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-06-05 22:27:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:04,303 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-06-05 22:27:04,303 INFO L483 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) [2021-06-05 22:27:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-06-05 22:27:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:04,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:04,316 INFO L554 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] [2021-06-05 22:27:04,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:04,517 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:04,517 INFO L82 PathProgramCache]: Analyzing trace with hash -876630137, now seen corresponding path program 32 times [2021-06-05 22:27:04,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:04,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057287612] [2021-06-05 22:27:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:27:04,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057287612] [2021-06-05 22:27:04,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057287612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:04,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836869226] [2021-06-05 22:27:04,567 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 [2021-06-05 22:27:04,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:04,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:04,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:27:04,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836869226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:04,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:04,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:04,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706847404] [2021-06-05 22:27:04,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:04,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:04,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:04,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:04,762 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) [2021-06-05 22:27:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:04,921 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-06-05 22:27:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:04,921 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 [2021-06-05 22:27:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:04,947 INFO L225 Difference]: With dead ends: 20680 [2021-06-05 22:27:04,947 INFO L226 Difference]: Without dead ends: 20680 [2021-06-05 22:27:04,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-06-05 22:27:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-06-05 22:27:05,131 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) [2021-06-05 22:27:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-06-05 22:27:05,157 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-06-05 22:27:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:05,157 INFO L482 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-06-05 22:27:05,157 INFO L483 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) [2021-06-05 22:27:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-06-05 22:27:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:05,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:05,171 INFO L554 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] [2021-06-05 22:27:05,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 22:27:05,372 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1293149669, now seen corresponding path program 33 times [2021-06-05 22:27:05,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:05,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195833638] [2021-06-05 22:27:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:27:05,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:05,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195833638] [2021-06-05 22:27:05,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195833638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:05,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140494163] [2021-06-05 22:27:05,404 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 [2021-06-05 22:27:05,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:27:05,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:27:05,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140494163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:05,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:05,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:05,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733790759] [2021-06-05 22:27:05,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:05,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:05,589 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) [2021-06-05 22:27:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:05,743 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-06-05 22:27:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:05,743 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 [2021-06-05 22:27:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:05,768 INFO L225 Difference]: With dead ends: 19104 [2021-06-05 22:27:05,768 INFO L226 Difference]: Without dead ends: 19104 [2021-06-05 22:27:05,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-06-05 22:27:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-06-05 22:27:05,993 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) [2021-06-05 22:27:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-06-05 22:27:06,018 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-06-05 22:27:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:06,018 INFO L482 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-06-05 22:27:06,018 INFO L483 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) [2021-06-05 22:27:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-06-05 22:27:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:06,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:06,031 INFO L554 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] [2021-06-05 22:27:06,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:06,232 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:06,232 INFO L82 PathProgramCache]: Analyzing trace with hash -731848889, now seen corresponding path program 34 times [2021-06-05 22:27:06,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:06,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069716237] [2021-06-05 22:27:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:06,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:06,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069716237] [2021-06-05 22:27:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069716237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:06,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743584] [2021-06-05 22:27:06,264 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 [2021-06-05 22:27:06,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:06,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:06,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:06,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:06,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:27:06,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189312217] [2021-06-05 22:27:06,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:27:06,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:27:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:06,366 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) [2021-06-05 22:27:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:06,531 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-06-05 22:27:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:06,532 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 [2021-06-05 22:27:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:06,551 INFO L225 Difference]: With dead ends: 21829 [2021-06-05 22:27:06,551 INFO L226 Difference]: Without dead ends: 21829 [2021-06-05 22:27:06,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-06-05 22:27:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-06-05 22:27:06,743 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) [2021-06-05 22:27:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-06-05 22:27:06,771 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-06-05 22:27:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:06,771 INFO L482 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-06-05 22:27:06,771 INFO L483 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) [2021-06-05 22:27:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-06-05 22:27:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:06,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:06,784 INFO L554 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] [2021-06-05 22:27:06,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:27:06,984 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash 438207111, now seen corresponding path program 35 times [2021-06-05 22:27:06,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:06,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801842280] [2021-06-05 22:27:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:07,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801842280] [2021-06-05 22:27:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801842280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241130987] [2021-06-05 22:27:07,016 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 [2021-06-05 22:27:07,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:27:07,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:07,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241130987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:07,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:27:07,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085495835] [2021-06-05 22:27:07,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:27:07,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:27:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:07,111 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) [2021-06-05 22:27:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:07,222 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-06-05 22:27:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:07,224 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 [2021-06-05 22:27:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:07,249 INFO L225 Difference]: With dead ends: 21712 [2021-06-05 22:27:07,249 INFO L226 Difference]: Without dead ends: 21704 [2021-06-05 22:27:07,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-06-05 22:27:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-06-05 22:27:07,506 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) [2021-06-05 22:27:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-06-05 22:27:07,539 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-06-05 22:27:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:07,539 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-06-05 22:27:07,539 INFO L483 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) [2021-06-05 22:27:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-06-05 22:27:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:27:07,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:07,554 INFO L554 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] [2021-06-05 22:27:07,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:07,754 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2098532755, now seen corresponding path program 36 times [2021-06-05 22:27:07,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:07,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027121147] [2021-06-05 22:27:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:07,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027121147] [2021-06-05 22:27:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027121147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503970408] [2021-06-05 22:27:07,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:07,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:27:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:27:07,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503970408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:07,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 22:27:07,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564230773] [2021-06-05 22:27:07,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:27:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:27:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:07,924 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) [2021-06-05 22:27:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:08,495 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-06-05 22:27:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:27:08,496 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 [2021-06-05 22:27:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:08,541 INFO L225 Difference]: With dead ends: 28400 [2021-06-05 22:27:08,541 INFO L226 Difference]: Without dead ends: 28376 [2021-06-05 22:27:08,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:27:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-06-05 22:27:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-06-05 22:27:08,887 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) [2021-06-05 22:27:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-06-05 22:27:08,919 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-06-05 22:27:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:08,919 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-06-05 22:27:08,920 INFO L483 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) [2021-06-05 22:27:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-06-05 22:27:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:08,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:08,938 INFO L554 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] [2021-06-05 22:27:09,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 22:27:09,153 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash -676350810, now seen corresponding path program 37 times [2021-06-05 22:27:09,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:09,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921145228] [2021-06-05 22:27:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921145228] [2021-06-05 22:27:09,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921145228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107734327] [2021-06-05 22:27:09,235 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 [2021-06-05 22:27:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107734327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:09,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:09,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:27:09,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352868453] [2021-06-05 22:27:09,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:27:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:27:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:27:09,372 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) [2021-06-05 22:27:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,597 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-06-05 22:27:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:09,597 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 [2021-06-05 22:27:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,626 INFO L225 Difference]: With dead ends: 25889 [2021-06-05 22:27:09,627 INFO L226 Difference]: Without dead ends: 25889 [2021-06-05 22:27:09,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-06-05 22:27:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-06-05 22:27:09,897 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) [2021-06-05 22:27:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-06-05 22:27:09,931 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-06-05 22:27:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:09,931 INFO L482 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-06-05 22:27:09,931 INFO L483 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) [2021-06-05 22:27:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-06-05 22:27:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:09,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,950 INFO L554 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] [2021-06-05 22:27:10,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:27:10,152 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1178558949, now seen corresponding path program 38 times [2021-06-05 22:27:10,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:10,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014684255] [2021-06-05 22:27:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014684255] [2021-06-05 22:27:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014684255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608058371] [2021-06-05 22:27:10,223 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 [2021-06-05 22:27:10,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:10,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:10,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608058371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:10,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:27:10,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245433357] [2021-06-05 22:27:10,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:27:10,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:27:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:27:10,348 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) [2021-06-05 22:27:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:10,575 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-06-05 22:27:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:10,576 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 [2021-06-05 22:27:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:10,610 INFO L225 Difference]: With dead ends: 31481 [2021-06-05 22:27:10,610 INFO L226 Difference]: Without dead ends: 31323 [2021-06-05 22:27:10,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-05 22:27:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-06-05 22:27:11,042 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) [2021-06-05 22:27:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-06-05 22:27:11,090 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-06-05 22:27:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:11,090 INFO L482 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-06-05 22:27:11,090 INFO L483 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) [2021-06-05 22:27:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-06-05 22:27:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:11,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:11,113 INFO L554 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] [2021-06-05 22:27:11,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:11,313 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash 153461775, now seen corresponding path program 39 times [2021-06-05 22:27:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:11,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859783928] [2021-06-05 22:27:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859783928] [2021-06-05 22:27:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859783928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914746687] [2021-06-05 22:27:11,356 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:11,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:27:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914746687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:11,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:11,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441103859] [2021-06-05 22:27:11,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:11,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:11,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:11,494 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) [2021-06-05 22:27:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:11,658 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-06-05 22:27:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:11,658 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 [2021-06-05 22:27:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:11,691 INFO L225 Difference]: With dead ends: 31139 [2021-06-05 22:27:11,691 INFO L226 Difference]: Without dead ends: 31139 [2021-06-05 22:27:11,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-06-05 22:27:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-06-05 22:27:12,032 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) [2021-06-05 22:27:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-06-05 22:27:12,076 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-06-05 22:27:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:12,077 INFO L482 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-06-05 22:27:12,077 INFO L483 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) [2021-06-05 22:27:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-06-05 22:27:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:12,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:12,098 INFO L554 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] [2021-06-05 22:27:12,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 22:27:12,299 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 359936614, now seen corresponding path program 40 times [2021-06-05 22:27:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:12,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986173379] [2021-06-05 22:27:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:12,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986173379] [2021-06-05 22:27:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986173379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872883892] [2021-06-05 22:27:12,340 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 [2021-06-05 22:27:12,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872883892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:12,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:12,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358319839] [2021-06-05 22:27:12,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:12,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:12,469 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) [2021-06-05 22:27:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:12,660 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-06-05 22:27:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:12,660 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 [2021-06-05 22:27:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:12,697 INFO L225 Difference]: With dead ends: 29356 [2021-06-05 22:27:12,697 INFO L226 Difference]: Without dead ends: 29352 [2021-06-05 22:27:12,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-06-05 22:27:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-06-05 22:27:13,023 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) [2021-06-05 22:27:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-06-05 22:27:13,063 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-06-05 22:27:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:13,063 INFO L482 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-06-05 22:27:13,063 INFO L483 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) [2021-06-05 22:27:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-06-05 22:27:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:13,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:13,084 INFO L554 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] [2021-06-05 22:27:13,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:13,285 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:13,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1412824282, now seen corresponding path program 41 times [2021-06-05 22:27:13,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:13,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269452138] [2021-06-05 22:27:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:13,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:13,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269452138] [2021-06-05 22:27:13,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269452138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664496595] [2021-06-05 22:27:13,320 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 [2021-06-05 22:27:13,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:27:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:13,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:13,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664496595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:13,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:13,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156734403] [2021-06-05 22:27:13,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:13,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:13,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:13,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:13,433 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) [2021-06-05 22:27:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:13,587 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-06-05 22:27:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:13,587 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 [2021-06-05 22:27:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:13,625 INFO L225 Difference]: With dead ends: 35236 [2021-06-05 22:27:13,625 INFO L226 Difference]: Without dead ends: 35236 [2021-06-05 22:27:13,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-06-05 22:27:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-06-05 22:27:14,021 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) [2021-06-05 22:27:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-06-05 22:27:14,074 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-06-05 22:27:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:14,074 INFO L482 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-06-05 22:27:14,074 INFO L483 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) [2021-06-05 22:27:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-06-05 22:27:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:14,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:14,099 INFO L554 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] [2021-06-05 22:27:14,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:14,299 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -417869413, now seen corresponding path program 42 times [2021-06-05 22:27:14,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:14,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138343628] [2021-06-05 22:27:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:14,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138343628] [2021-06-05 22:27:14,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138343628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84769677] [2021-06-05 22:27:14,338 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 [2021-06-05 22:27:14,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:27:14,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:14,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84769677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:14,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:14,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500552701] [2021-06-05 22:27:14,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:14,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:14,444 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) [2021-06-05 22:27:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:14,642 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-06-05 22:27:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:14,642 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 [2021-06-05 22:27:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:14,686 INFO L225 Difference]: With dead ends: 34730 [2021-06-05 22:27:14,686 INFO L226 Difference]: Without dead ends: 34724 [2021-06-05 22:27:14,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-06-05 22:27:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-06-05 22:27:15,152 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) [2021-06-05 22:27:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-06-05 22:27:15,207 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-06-05 22:27:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:15,207 INFO L482 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-06-05 22:27:15,207 INFO L483 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) [2021-06-05 22:27:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-06-05 22:27:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:15,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:15,231 INFO L554 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] [2021-06-05 22:27:15,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 22:27:15,433 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -113143793, now seen corresponding path program 43 times [2021-06-05 22:27:15,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:15,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793747858] [2021-06-05 22:27:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:15,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793747858] [2021-06-05 22:27:15,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793747858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138577172] [2021-06-05 22:27:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138577172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:15,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:15,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671527658] [2021-06-05 22:27:15,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:15,609 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) [2021-06-05 22:27:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:15,778 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-06-05 22:27:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:15,779 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 [2021-06-05 22:27:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:15,820 INFO L225 Difference]: With dead ends: 35642 [2021-06-05 22:27:15,821 INFO L226 Difference]: Without dead ends: 35640 [2021-06-05 22:27:15,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-06-05 22:27:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-06-05 22:27:16,353 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) [2021-06-05 22:27:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-06-05 22:27:16,408 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-06-05 22:27:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:16,408 INFO L482 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-06-05 22:27:16,408 INFO L483 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) [2021-06-05 22:27:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-06-05 22:27:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:16,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:16,431 INFO L554 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] [2021-06-05 22:27:16,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:16,632 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 93331046, now seen corresponding path program 44 times [2021-06-05 22:27:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001090426] [2021-06-05 22:27:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:16,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:16,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001090426] [2021-06-05 22:27:16,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001090426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506990987] [2021-06-05 22:27:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:16,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:16,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:16,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506990987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:16,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455675731] [2021-06-05 22:27:16,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:16,786 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) [2021-06-05 22:27:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:16,979 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-06-05 22:27:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:16,979 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 [2021-06-05 22:27:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:17,021 INFO L225 Difference]: With dead ends: 35791 [2021-06-05 22:27:17,021 INFO L226 Difference]: Without dead ends: 35723 [2021-06-05 22:27:17,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-06-05 22:27:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-06-05 22:27:17,498 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) [2021-06-05 22:27:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-06-05 22:27:17,549 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-06-05 22:27:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:17,549 INFO L482 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-06-05 22:27:17,549 INFO L483 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) [2021-06-05 22:27:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-06-05 22:27:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:17,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:17,708 INFO L554 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] [2021-06-05 22:27:17,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 22:27:17,913 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash 277060133, now seen corresponding path program 45 times [2021-06-05 22:27:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:17,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316188355] [2021-06-05 22:27:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:17,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:17,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316188355] [2021-06-05 22:27:17,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316188355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:17,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828029810] [2021-06-05 22:27:17,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:18,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:27:18,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:18,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:18,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828029810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:18,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:18,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:18,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887194886] [2021-06-05 22:27:18,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:18,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:18,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:18,098 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) [2021-06-05 22:27:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:18,306 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-06-05 22:27:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:18,306 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 [2021-06-05 22:27:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:18,346 INFO L225 Difference]: With dead ends: 35258 [2021-06-05 22:27:18,346 INFO L226 Difference]: Without dead ends: 35256 [2021-06-05 22:27:18,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-06-05 22:27:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-06-05 22:27:18,740 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) [2021-06-05 22:27:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-06-05 22:27:18,789 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-06-05 22:27:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:18,789 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-06-05 22:27:18,790 INFO L483 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) [2021-06-05 22:27:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-06-05 22:27:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:18,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:18,811 INFO L554 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] [2021-06-05 22:27:19,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:27:19,011 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1851558476, now seen corresponding path program 46 times [2021-06-05 22:27:19,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:19,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046375669] [2021-06-05 22:27:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:19,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046375669] [2021-06-05 22:27:19,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046375669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877467966] [2021-06-05 22:27:19,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:19,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:19,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877467966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:19,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:19,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936392013] [2021-06-05 22:27:19,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:19,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:19,142 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) [2021-06-05 22:27:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:19,332 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-06-05 22:27:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:19,332 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 [2021-06-05 22:27:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:19,370 INFO L225 Difference]: With dead ends: 34889 [2021-06-05 22:27:19,371 INFO L226 Difference]: Without dead ends: 34865 [2021-06-05 22:27:19,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-06-05 22:27:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-06-05 22:27:19,830 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) [2021-06-05 22:27:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-06-05 22:27:19,878 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-06-05 22:27:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:19,878 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-06-05 22:27:19,878 INFO L483 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) [2021-06-05 22:27:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-06-05 22:27:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:19,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:19,899 INFO L554 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] [2021-06-05 22:27:20,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 22:27:20,100 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1633200633, now seen corresponding path program 47 times [2021-06-05 22:27:20,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:20,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743483820] [2021-06-05 22:27:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:27:20,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743483820] [2021-06-05 22:27:20,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743483820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228268015] [2021-06-05 22:27:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:20,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:20,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:20,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:20,368 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 22:27:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:27:20,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228268015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:20,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:20,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:20,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947327063] [2021-06-05 22:27:20,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:20,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:20,427 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) [2021-06-05 22:27:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:20,592 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-06-05 22:27:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:20,592 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 [2021-06-05 22:27:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:20,633 INFO L225 Difference]: With dead ends: 35848 [2021-06-05 22:27:20,633 INFO L226 Difference]: Without dead ends: 35812 [2021-06-05 22:27:20,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-05 22:27:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-06-05 22:27:21,122 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) [2021-06-05 22:27:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-06-05 22:27:21,168 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-06-05 22:27:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:21,168 INFO L482 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-06-05 22:27:21,169 INFO L483 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) [2021-06-05 22:27:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-06-05 22:27:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:21,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:21,188 INFO L554 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] [2021-06-05 22:27:21,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 22:27:21,389 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash -916831962, now seen corresponding path program 48 times [2021-06-05 22:27:21,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:21,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120656162] [2021-06-05 22:27:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:21,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120656162] [2021-06-05 22:27:21,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120656162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673911081] [2021-06-05 22:27:21,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:21,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:27:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:21,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673911081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:21,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:21,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499097527] [2021-06-05 22:27:21,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:21,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:21,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:21,540 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) [2021-06-05 22:27:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:21,712 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-06-05 22:27:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:21,712 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 [2021-06-05 22:27:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:21,757 INFO L225 Difference]: With dead ends: 40718 [2021-06-05 22:27:21,757 INFO L226 Difference]: Without dead ends: 40718 [2021-06-05 22:27:21,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-06-05 22:27:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-06-05 22:27:22,254 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) [2021-06-05 22:27:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-06-05 22:27:22,308 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-06-05 22:27:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:22,308 INFO L482 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-06-05 22:27:22,309 INFO L483 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) [2021-06-05 22:27:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-06-05 22:27:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:22,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:22,329 INFO L554 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] [2021-06-05 22:27:22,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:22,545 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash 78122907, now seen corresponding path program 49 times [2021-06-05 22:27:22,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:22,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976454979] [2021-06-05 22:27:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:22,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976454979] [2021-06-05 22:27:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976454979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676898403] [2021-06-05 22:27:22,578 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 [2021-06-05 22:27:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:22,765 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 22:27:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:22,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676898403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:22,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226346651] [2021-06-05 22:27:22,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:22,827 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) [2021-06-05 22:27:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:23,016 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-06-05 22:27:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:23,016 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 [2021-06-05 22:27:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:23,061 INFO L225 Difference]: With dead ends: 40524 [2021-06-05 22:27:23,061 INFO L226 Difference]: Without dead ends: 40488 [2021-06-05 22:27:23,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-06-05 22:27:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-06-05 22:27:23,531 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) [2021-06-05 22:27:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-06-05 22:27:23,582 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-06-05 22:27:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:23,582 INFO L482 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-06-05 22:27:23,582 INFO L483 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) [2021-06-05 22:27:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-06-05 22:27:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:23,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:23,602 INFO L554 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] [2021-06-05 22:27:23,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:23,805 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash 382848527, now seen corresponding path program 50 times [2021-06-05 22:27:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957431613] [2021-06-05 22:27:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:23,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:23,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957431613] [2021-06-05 22:27:23,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957431613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:23,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363830864] [2021-06-05 22:27:23,838 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 [2021-06-05 22:27:23,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:23,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:23,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363830864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:23,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:23,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:23,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853248704] [2021-06-05 22:27:23,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:23,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:23,985 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) [2021-06-05 22:27:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:24,139 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-06-05 22:27:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:24,139 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 [2021-06-05 22:27:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:24,179 INFO L225 Difference]: With dead ends: 39280 [2021-06-05 22:27:24,179 INFO L226 Difference]: Without dead ends: 39278 [2021-06-05 22:27:24,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-06-05 22:27:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-06-05 22:27:24,700 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) [2021-06-05 22:27:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-06-05 22:27:24,754 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-06-05 22:27:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:24,754 INFO L482 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-06-05 22:27:24,754 INFO L483 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) [2021-06-05 22:27:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-06-05 22:27:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:24,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:24,775 INFO L554 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] [2021-06-05 22:27:24,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:24,976 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash 589323366, now seen corresponding path program 51 times [2021-06-05 22:27:24,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:24,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602350605] [2021-06-05 22:27:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:25,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602350605] [2021-06-05 22:27:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602350605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210607369] [2021-06-05 22:27:25,013 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 [2021-06-05 22:27:25,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:25,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:27:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 22:27:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210607369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:25,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:25,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 22:27:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291575431] [2021-06-05 22:27:25,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:25,347 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) [2021-06-05 22:27:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:26,170 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-06-05 22:27:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:27:26,170 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 [2021-06-05 22:27:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:26,244 INFO L225 Difference]: With dead ends: 65704 [2021-06-05 22:27:26,244 INFO L226 Difference]: Without dead ends: 65560 [2021-06-05 22:27:26,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:27:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-06-05 22:27:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-06-05 22:27:27,159 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) [2021-06-05 22:27:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-06-05 22:27:27,241 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-06-05 22:27:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:27,241 INFO L482 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-06-05 22:27:27,241 INFO L483 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) [2021-06-05 22:27:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-06-05 22:27:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:27,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:27,268 INFO L554 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] [2021-06-05 22:27:27,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 22:27:27,469 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 773052453, now seen corresponding path program 52 times [2021-06-05 22:27:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:27,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277282] [2021-06-05 22:27:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:27,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:27,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277282] [2021-06-05 22:27:27,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:27,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129779366] [2021-06-05 22:27:27,508 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 [2021-06-05 22:27:27,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129779366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:27,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:27,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:27,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929554691] [2021-06-05 22:27:27,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:27,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:27,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:27,621 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) [2021-06-05 22:27:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:27,844 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-06-05 22:27:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:27,845 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 [2021-06-05 22:27:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:27,911 INFO L225 Difference]: With dead ends: 57450 [2021-06-05 22:27:27,911 INFO L226 Difference]: Without dead ends: 57432 [2021-06-05 22:27:27,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:27:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-06-05 22:27:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-06-05 22:27:28,899 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) [2021-06-05 22:27:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-06-05 22:27:28,978 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-06-05 22:27:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:28,979 INFO L482 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-06-05 22:27:28,979 INFO L483 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) [2021-06-05 22:27:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-06-05 22:27:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:29,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:29,006 INFO L554 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] [2021-06-05 22:27:29,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:29,207 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:29,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2069049913, now seen corresponding path program 53 times [2021-06-05 22:27:29,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:29,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879903338] [2021-06-05 22:27:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:29,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:29,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879903338] [2021-06-05 22:27:29,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879903338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:29,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016286665] [2021-06-05 22:27:29,247 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 [2021-06-05 22:27:29,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:27:29,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:29,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016286665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:29,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:29,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:27:29,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425111504] [2021-06-05 22:27:29,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:27:29,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:27:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:27:29,348 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) [2021-06-05 22:27:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:29,576 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-06-05 22:27:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:29,576 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 [2021-06-05 22:27:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:29,639 INFO L225 Difference]: With dead ends: 53406 [2021-06-05 22:27:29,640 INFO L226 Difference]: Without dead ends: 53388 [2021-06-05 22:27:29,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-06-05 22:27:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-06-05 22:27:30,505 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) [2021-06-05 22:27:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-06-05 22:27:30,576 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-06-05 22:27:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:30,577 INFO L482 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-06-05 22:27:30,577 INFO L483 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) [2021-06-05 22:27:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-06-05 22:27:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:30,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:30,824 INFO L554 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] [2021-06-05 22:27:31,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 22:27:31,037 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash -361343013, now seen corresponding path program 54 times [2021-06-05 22:27:31,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:31,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355841527] [2021-06-05 22:27:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:27:31,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:31,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355841527] [2021-06-05 22:27:31,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355841527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:31,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040514949] [2021-06-05 22:27:31,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:31,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:27:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:27:31,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040514949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:31,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:31,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:31,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310012495] [2021-06-05 22:27:31,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:31,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:31,172 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) [2021-06-05 22:27:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:31,384 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-06-05 22:27:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:31,384 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 [2021-06-05 22:27:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:31,440 INFO L225 Difference]: With dead ends: 49711 [2021-06-05 22:27:31,440 INFO L226 Difference]: Without dead ends: 49645 [2021-06-05 22:27:31,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-06-05 22:27:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-06-05 22:27:32,007 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) [2021-06-05 22:27:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-06-05 22:27:32,074 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-06-05 22:27:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:32,075 INFO L482 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-06-05 22:27:32,075 INFO L483 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) [2021-06-05 22:27:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-06-05 22:27:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:32,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:32,095 INFO L554 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] [2021-06-05 22:27:32,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:32,295 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:32,296 INFO L82 PathProgramCache]: Analyzing trace with hash -378550939, now seen corresponding path program 55 times [2021-06-05 22:27:32,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:32,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100420140] [2021-06-05 22:27:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:27:32,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:32,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100420140] [2021-06-05 22:27:32,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100420140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:32,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454616150] [2021-06-05 22:27:32,329 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 [2021-06-05 22:27:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:27:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454616150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:32,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:32,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:32,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828641573] [2021-06-05 22:27:32,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:32,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:32,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:32,441 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) [2021-06-05 22:27:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:32,626 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-06-05 22:27:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:32,626 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 [2021-06-05 22:27:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:32,683 INFO L225 Difference]: With dead ends: 51903 [2021-06-05 22:27:32,684 INFO L226 Difference]: Without dead ends: 51867 [2021-06-05 22:27:32,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-06-05 22:27:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-06-05 22:27:33,364 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) [2021-06-05 22:27:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-06-05 22:27:33,444 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-06-05 22:27:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:33,444 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-06-05 22:27:33,444 INFO L483 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) [2021-06-05 22:27:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-06-05 22:27:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:33,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:33,472 INFO L554 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] [2021-06-05 22:27:33,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 22:27:33,673 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1368047205, now seen corresponding path program 56 times [2021-06-05 22:27:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054966204] [2021-06-05 22:27:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:33,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054966204] [2021-06-05 22:27:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054966204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114270698] [2021-06-05 22:27:33,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:33,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:33,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:33,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114270698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:33,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:33,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166171824] [2021-06-05 22:27:33,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:33,822 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) [2021-06-05 22:27:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:34,223 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-06-05 22:27:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:34,224 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 [2021-06-05 22:27:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:34,288 INFO L225 Difference]: With dead ends: 54564 [2021-06-05 22:27:34,289 INFO L226 Difference]: Without dead ends: 54522 [2021-06-05 22:27:34,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-06-05 22:27:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-06-05 22:27:35,144 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) [2021-06-05 22:27:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-06-05 22:27:35,222 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-06-05 22:27:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:35,222 INFO L482 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-06-05 22:27:35,222 INFO L483 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) [2021-06-05 22:27:35,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-06-05 22:27:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:35,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:35,248 INFO L554 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] [2021-06-05 22:27:35,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:35,449 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1063321585, now seen corresponding path program 57 times [2021-06-05 22:27:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:35,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901339550] [2021-06-05 22:27:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:35,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901339550] [2021-06-05 22:27:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901339550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98544577] [2021-06-05 22:27:35,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:35,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:27:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:35,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98544577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:35,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:35,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:35,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246393393] [2021-06-05 22:27:35,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:35,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:35,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:35,609 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) [2021-06-05 22:27:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:35,806 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-06-05 22:27:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:35,806 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 [2021-06-05 22:27:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:35,866 INFO L225 Difference]: With dead ends: 54000 [2021-06-05 22:27:35,867 INFO L226 Difference]: Without dead ends: 53998 [2021-06-05 22:27:35,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-06-05 22:27:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-06-05 22:27:36,581 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) [2021-06-05 22:27:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-06-05 22:27:36,660 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-06-05 22:27:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:36,660 INFO L482 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-06-05 22:27:36,661 INFO L483 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) [2021-06-05 22:27:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-06-05 22:27:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:36,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:36,689 INFO L554 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] [2021-06-05 22:27:36,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 22:27:36,889 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash -673117659, now seen corresponding path program 58 times [2021-06-05 22:27:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:36,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152671530] [2021-06-05 22:27:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:36,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:36,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152671530] [2021-06-05 22:27:36,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152671530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:36,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078952510] [2021-06-05 22:27:36,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:36,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:36,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078952510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:37,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:37,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592154947] [2021-06-05 22:27:37,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:37,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:37,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:37,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:37,052 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) [2021-06-05 22:27:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:37,335 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-06-05 22:27:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:37,335 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 [2021-06-05 22:27:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:37,403 INFO L225 Difference]: With dead ends: 57784 [2021-06-05 22:27:37,403 INFO L226 Difference]: Without dead ends: 57782 [2021-06-05 22:27:37,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-06-05 22:27:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-06-05 22:27:38,205 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) [2021-06-05 22:27:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-06-05 22:27:38,283 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-06-05 22:27:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:38,283 INFO L482 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-06-05 22:27:38,283 INFO L483 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) [2021-06-05 22:27:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-06-05 22:27:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:38,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:38,309 INFO L554 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] [2021-06-05 22:27:38,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 22:27:38,510 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash 779747271, now seen corresponding path program 59 times [2021-06-05 22:27:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:38,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865250351] [2021-06-05 22:27:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:38,797 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 22:27:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:38,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:38,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865250351] [2021-06-05 22:27:38,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865250351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:38,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294379161] [2021-06-05 22:27:38,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:38,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:27:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:38,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:38,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294379161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:38,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:38,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:27:38,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007700094] [2021-06-05 22:27:38,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:27:38,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:27:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:27:38,940 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) [2021-06-05 22:27:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:39,224 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-06-05 22:27:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:39,225 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 [2021-06-05 22:27:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:39,294 INFO L225 Difference]: With dead ends: 56504 [2021-06-05 22:27:39,294 INFO L226 Difference]: Without dead ends: 56502 [2021-06-05 22:27:39,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-06-05 22:27:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-06-05 22:27:40,173 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) [2021-06-05 22:27:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-06-05 22:27:40,256 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-06-05 22:27:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:40,256 INFO L482 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-06-05 22:27:40,256 INFO L483 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) [2021-06-05 22:27:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-06-05 22:27:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:40,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:40,284 INFO L554 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] [2021-06-05 22:27:40,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:40,489 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1081723995, now seen corresponding path program 60 times [2021-06-05 22:27:40,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:40,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011343387] [2021-06-05 22:27:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011343387] [2021-06-05 22:27:40,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011343387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67772168] [2021-06-05 22:27:40,541 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) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:40,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:27:40,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:40,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67772168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:40,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:40,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:27:40,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861701267] [2021-06-05 22:27:40,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:27:40,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:27:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:40,662 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) [2021-06-05 22:27:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:40,909 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-06-05 22:27:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:40,909 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 [2021-06-05 22:27:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:40,968 INFO L225 Difference]: With dead ends: 53832 [2021-06-05 22:27:40,968 INFO L226 Difference]: Without dead ends: 53830 [2021-06-05 22:27:40,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-06-05 22:27:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-06-05 22:27:41,705 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) [2021-06-05 22:27:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-06-05 22:27:41,781 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-06-05 22:27:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:41,781 INFO L482 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-06-05 22:27:41,781 INFO L483 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) [2021-06-05 22:27:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-06-05 22:27:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:41,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:41,807 INFO L554 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] [2021-06-05 22:27:42,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:42,008 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2020283719, now seen corresponding path program 61 times [2021-06-05 22:27:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:42,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670315719] [2021-06-05 22:27:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:27:42,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:42,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670315719] [2021-06-05 22:27:42,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670315719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:42,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074435526] [2021-06-05 22:27:42,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:27:42,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074435526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:42,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:42,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:27:42,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623539699] [2021-06-05 22:27:42,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:27:42,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:27:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:42,152 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) [2021-06-05 22:27:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:42,393 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-06-05 22:27:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:42,394 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 [2021-06-05 22:27:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:42,451 INFO L225 Difference]: With dead ends: 51331 [2021-06-05 22:27:42,451 INFO L226 Difference]: Without dead ends: 51235 [2021-06-05 22:27:42,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-06-05 22:27:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-06-05 22:27:43,198 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) [2021-06-05 22:27:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-06-05 22:27:43,262 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-06-05 22:27:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:43,262 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-06-05 22:27:43,262 INFO L483 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) [2021-06-05 22:27:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-06-05 22:27:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:43,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:43,287 INFO L554 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] [2021-06-05 22:27:43,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 22:27:43,488 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:43,488 INFO L82 PathProgramCache]: Analyzing trace with hash 517101275, now seen corresponding path program 62 times [2021-06-05 22:27:43,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:43,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639084080] [2021-06-05 22:27:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:27:43,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:43,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639084080] [2021-06-05 22:27:43,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639084080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:43,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202420505] [2021-06-05 22:27:43,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:43,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:43,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:27:43,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202420505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:43,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:43,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:27:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905575634] [2021-06-05 22:27:43,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:27:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:27:43,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:27:43,631 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) [2021-06-05 22:27:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:43,834 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-06-05 22:27:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:43,835 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 [2021-06-05 22:27:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:43,882 INFO L225 Difference]: With dead ends: 48435 [2021-06-05 22:27:43,883 INFO L226 Difference]: Without dead ends: 48369 [2021-06-05 22:27:43,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-06-05 22:27:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-06-05 22:27:44,710 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) [2021-06-05 22:27:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-06-05 22:27:44,786 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-06-05 22:27:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:44,786 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-06-05 22:27:44,786 INFO L483 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) [2021-06-05 22:27:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-06-05 22:27:44,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:44,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:44,814 INFO L554 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] [2021-06-05 22:27:45,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:45,015 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1809607417, now seen corresponding path program 63 times [2021-06-05 22:27:45,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:45,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386219913] [2021-06-05 22:27:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:27:45,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386219913] [2021-06-05 22:27:45,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386219913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:45,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190537562] [2021-06-05 22:27:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:45,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:27:45,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:27:45,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190537562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:45,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:45,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:45,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628008698] [2021-06-05 22:27:45,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:45,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:45,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:45,184 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) [2021-06-05 22:27:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:45,394 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-06-05 22:27:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:45,394 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 [2021-06-05 22:27:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:45,717 INFO L225 Difference]: With dead ends: 48187 [2021-06-05 22:27:45,718 INFO L226 Difference]: Without dead ends: 48151 [2021-06-05 22:27:45,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-06-05 22:27:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-06-05 22:27:46,214 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) [2021-06-05 22:27:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-06-05 22:27:46,286 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-06-05 22:27:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:46,287 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-06-05 22:27:46,287 INFO L483 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) [2021-06-05 22:27:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-06-05 22:27:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:46,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:46,314 INFO L554 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] [2021-06-05 22:27:46,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 22:27:46,515 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2068840347, now seen corresponding path program 64 times [2021-06-05 22:27:46,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:46,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498017006] [2021-06-05 22:27:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:46,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498017006] [2021-06-05 22:27:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498017006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491685032] [2021-06-05 22:27:46,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:46,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:46,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491685032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:46,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:46,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:46,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470488310] [2021-06-05 22:27:46,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:46,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:46,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:46,655 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) [2021-06-05 22:27:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:47,077 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-06-05 22:27:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:47,077 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 [2021-06-05 22:27:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:47,134 INFO L225 Difference]: With dead ends: 51250 [2021-06-05 22:27:47,134 INFO L226 Difference]: Without dead ends: 51244 [2021-06-05 22:27:47,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-06-05 22:27:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-06-05 22:27:47,672 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) [2021-06-05 22:27:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-06-05 22:27:47,749 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-06-05 22:27:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:47,749 INFO L482 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-06-05 22:27:47,750 INFO L483 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) [2021-06-05 22:27:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-06-05 22:27:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:48,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:48,020 INFO L554 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] [2021-06-05 22:27:48,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:48,233 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1921401329, now seen corresponding path program 65 times [2021-06-05 22:27:48,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:48,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312368493] [2021-06-05 22:27:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:48,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:48,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312368493] [2021-06-05 22:27:48,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312368493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:48,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890427342] [2021-06-05 22:27:48,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:48,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:27:48,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:48,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:48,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890427342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:48,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:48,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:27:48,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499455676] [2021-06-05 22:27:48,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:27:48,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:48,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:27:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:27:48,374 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) [2021-06-05 22:27:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:48,566 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-06-05 22:27:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:48,566 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 [2021-06-05 22:27:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:48,625 INFO L225 Difference]: With dead ends: 52650 [2021-06-05 22:27:48,625 INFO L226 Difference]: Without dead ends: 52650 [2021-06-05 22:27:48,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-06-05 22:27:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-06-05 22:27:49,160 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) [2021-06-05 22:27:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-06-05 22:27:49,508 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-06-05 22:27:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:49,508 INFO L482 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-06-05 22:27:49,508 INFO L483 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) [2021-06-05 22:27:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-06-05 22:27:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:49,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:49,537 INFO L554 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] [2021-06-05 22:27:49,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 22:27:49,738 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:49,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1531197403, now seen corresponding path program 66 times [2021-06-05 22:27:49,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:49,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639170815] [2021-06-05 22:27:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:49,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:49,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639170815] [2021-06-05 22:27:49,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639170815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:49,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475122156] [2021-06-05 22:27:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:49,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:27:49,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:49,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:49,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475122156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:49,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:49,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725963347] [2021-06-05 22:27:49,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:49,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:49,880 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) [2021-06-05 22:27:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:50,134 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-06-05 22:27:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:50,134 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 [2021-06-05 22:27:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:50,201 INFO L225 Difference]: With dead ends: 56418 [2021-06-05 22:27:50,201 INFO L226 Difference]: Without dead ends: 56418 [2021-06-05 22:27:50,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-06-05 22:27:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-06-05 22:27:51,072 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) [2021-06-05 22:27:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-06-05 22:27:51,149 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-06-05 22:27:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:51,149 INFO L482 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-06-05 22:27:51,149 INFO L483 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) [2021-06-05 22:27:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-06-05 22:27:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:51,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:51,176 INFO L554 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] [2021-06-05 22:27:51,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:51,376 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -78332473, now seen corresponding path program 67 times [2021-06-05 22:27:51,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:51,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304339954] [2021-06-05 22:27:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:51,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:51,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304339954] [2021-06-05 22:27:51,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304339954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:51,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411616516] [2021-06-05 22:27:51,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:51,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:51,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411616516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:51,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:51,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:27:51,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439420069] [2021-06-05 22:27:51,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:27:51,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:27:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:27:51,537 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) [2021-06-05 22:27:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:51,805 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-06-05 22:27:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:51,805 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 [2021-06-05 22:27:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:51,869 INFO L225 Difference]: With dead ends: 56662 [2021-06-05 22:27:51,870 INFO L226 Difference]: Without dead ends: 56662 [2021-06-05 22:27:51,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-06-05 22:27:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-06-05 22:27:52,650 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) [2021-06-05 22:27:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-06-05 22:27:52,728 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-06-05 22:27:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:52,728 INFO L482 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-06-05 22:27:52,728 INFO L483 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) [2021-06-05 22:27:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-06-05 22:27:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:52,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:52,756 INFO L554 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] [2021-06-05 22:27:52,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 22:27:52,958 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1939803739, now seen corresponding path program 68 times [2021-06-05 22:27:52,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:52,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639956014] [2021-06-05 22:27:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:53,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:53,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639956014] [2021-06-05 22:27:53,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639956014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020544236] [2021-06-05 22:27:53,006 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 [2021-06-05 22:27:53,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:53,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:53,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020544236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:53,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:53,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:27:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857730305] [2021-06-05 22:27:53,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:27:53,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:27:53,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:53,111 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) [2021-06-05 22:27:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:53,435 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-06-05 22:27:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:53,436 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 [2021-06-05 22:27:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:53,497 INFO L225 Difference]: With dead ends: 54674 [2021-06-05 22:27:53,497 INFO L226 Difference]: Without dead ends: 54674 [2021-06-05 22:27:53,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:27:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-06-05 22:27:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-06-05 22:27:54,293 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) [2021-06-05 22:27:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-06-05 22:27:54,369 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-06-05 22:27:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-06-05 22:27:54,369 INFO L483 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) [2021-06-05 22:27:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-06-05 22:27:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:27:54,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:54,398 INFO L554 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] [2021-06-05 22:27:54,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:54,599 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1664826169, now seen corresponding path program 69 times [2021-06-05 22:27:54,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:54,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621794001] [2021-06-05 22:27:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:54,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:54,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621794001] [2021-06-05 22:27:54,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621794001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:54,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52359013] [2021-06-05 22:27:54,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:54,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:27:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:54,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52359013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:54,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:54,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:27:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199898751] [2021-06-05 22:27:54,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:27:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:27:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:27:54,758 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) [2021-06-05 22:27:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:55,088 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-06-05 22:27:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:55,088 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 [2021-06-05 22:27:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:55,165 INFO L225 Difference]: With dead ends: 52880 [2021-06-05 22:27:55,165 INFO L226 Difference]: Without dead ends: 52880 [2021-06-05 22:27:55,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-06-05 22:27:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-06-05 22:27:55,966 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) [2021-06-05 22:27:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-06-05 22:27:56,052 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-06-05 22:27:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:56,052 INFO L482 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-06-05 22:27:56,052 INFO L483 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) [2021-06-05 22:27:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-06-05 22:27:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:27:56,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:56,093 INFO L554 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] [2021-06-05 22:27:56,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:56,294 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -418208773, now seen corresponding path program 70 times [2021-06-05 22:27:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:56,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104043948] [2021-06-05 22:27:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:56,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:56,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104043948] [2021-06-05 22:27:56,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104043948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:56,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139248909] [2021-06-05 22:27:56,410 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 [2021-06-05 22:27:56,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:56,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:27:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:56,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139248909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:56,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:56,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:27:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683343799] [2021-06-05 22:27:56,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:27:56,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:27:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:27:56,539 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) [2021-06-05 22:27:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:56,887 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-06-05 22:27:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:56,888 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 [2021-06-05 22:27:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:56,954 INFO L225 Difference]: With dead ends: 55302 [2021-06-05 22:27:56,954 INFO L226 Difference]: Without dead ends: 55302 [2021-06-05 22:27:56,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:27:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-06-05 22:27:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-06-05 22:27:57,752 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) [2021-06-05 22:27:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-06-05 22:27:57,829 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-06-05 22:27:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:57,829 INFO L482 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-06-05 22:27:57,829 INFO L483 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) [2021-06-05 22:27:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-06-05 22:27:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:27:57,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:57,865 INFO L554 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] [2021-06-05 22:27:58,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:58,066 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -12185795, now seen corresponding path program 71 times [2021-06-05 22:27:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:58,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033262349] [2021-06-05 22:27:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:58,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033262349] [2021-06-05 22:27:58,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033262349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060693670] [2021-06-05 22:27:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:58,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:27:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:27:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060693670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:58,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:58,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862392526] [2021-06-05 22:27:58,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:58,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:58,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:58,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:58,227 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) [2021-06-05 22:27:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:58,434 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-06-05 22:27:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:58,434 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 [2021-06-05 22:27:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:58,495 INFO L225 Difference]: With dead ends: 51084 [2021-06-05 22:27:58,495 INFO L226 Difference]: Without dead ends: 51076 [2021-06-05 22:27:58,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-06-05 22:27:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-06-05 22:27:59,251 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) [2021-06-05 22:27:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-06-05 22:27:59,326 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-06-05 22:27:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:59,326 INFO L482 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-06-05 22:27:59,326 INFO L483 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) [2021-06-05 22:27:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-06-05 22:27:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:27:59,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:59,363 INFO L554 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] [2021-06-05 22:27:59,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:59,563 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1308699737, now seen corresponding path program 72 times [2021-06-05 22:27:59,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:59,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229171088] [2021-06-05 22:27:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:59,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229171088] [2021-06-05 22:27:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229171088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817062049] [2021-06-05 22:27:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:59,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:27:59,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:27:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:27:59,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817062049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:59,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:59,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:27:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917224067] [2021-06-05 22:27:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:59,734 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) [2021-06-05 22:28:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:00,004 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-06-05 22:28:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:00,005 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 [2021-06-05 22:28:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:00,091 INFO L225 Difference]: With dead ends: 58739 [2021-06-05 22:28:00,091 INFO L226 Difference]: Without dead ends: 58739 [2021-06-05 22:28:00,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-06-05 22:28:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-06-05 22:28:00,997 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) [2021-06-05 22:28:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-06-05 22:28:01,077 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-06-05 22:28:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-06-05 22:28:01,078 INFO L483 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) [2021-06-05 22:28:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-06-05 22:28:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:01,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:01,115 INFO L554 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] [2021-06-05 22:28:01,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:01,316 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash -138643737, now seen corresponding path program 73 times [2021-06-05 22:28:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:01,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21350004] [2021-06-05 22:28:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:01,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21350004] [2021-06-05 22:28:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21350004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236760961] [2021-06-05 22:28:01,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:01,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236760961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:01,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:01,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632551115] [2021-06-05 22:28:01,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:01,496 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) [2021-06-05 22:28:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:02,020 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-06-05 22:28:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:02,020 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 [2021-06-05 22:28:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:02,083 INFO L225 Difference]: With dead ends: 56467 [2021-06-05 22:28:02,083 INFO L226 Difference]: Without dead ends: 56375 [2021-06-05 22:28:02,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-06-05 22:28:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-06-05 22:28:02,701 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) [2021-06-05 22:28:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-06-05 22:28:02,778 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-06-05 22:28:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:02,778 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-06-05 22:28:02,778 INFO L483 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) [2021-06-05 22:28:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-06-05 22:28:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:02,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:02,815 INFO L554 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] [2021-06-05 22:28:03,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:03,016 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1619583693, now seen corresponding path program 74 times [2021-06-05 22:28:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:03,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040275020] [2021-06-05 22:28:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:03,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040275020] [2021-06-05 22:28:03,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040275020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534332845] [2021-06-05 22:28:03,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:03,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:03,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:03,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534332845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:03,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:03,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:03,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72972381] [2021-06-05 22:28:03,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:03,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:03,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:03,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:03,449 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) [2021-06-05 22:28:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:03,755 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-06-05 22:28:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:03,755 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 [2021-06-05 22:28:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:03,812 INFO L225 Difference]: With dead ends: 53573 [2021-06-05 22:28:03,812 INFO L226 Difference]: Without dead ends: 53525 [2021-06-05 22:28:03,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-06-05 22:28:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-06-05 22:28:04,366 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) [2021-06-05 22:28:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-06-05 22:28:04,728 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-06-05 22:28:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:04,728 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-06-05 22:28:04,728 INFO L483 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) [2021-06-05 22:28:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-06-05 22:28:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:04,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:04,767 INFO L554 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] [2021-06-05 22:28:04,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:04,968 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -607697029, now seen corresponding path program 75 times [2021-06-05 22:28:04,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:04,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031916988] [2021-06-05 22:28:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:28:05,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031916988] [2021-06-05 22:28:05,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031916988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572989882] [2021-06-05 22:28:05,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:05,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:28:05,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:28:05,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572989882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:05,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:05,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962266252] [2021-06-05 22:28:05,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:05,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:05,137 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) [2021-06-05 22:28:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:05,369 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-06-05 22:28:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:05,369 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 [2021-06-05 22:28:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:05,460 INFO L225 Difference]: With dead ends: 66038 [2021-06-05 22:28:05,460 INFO L226 Difference]: Without dead ends: 66011 [2021-06-05 22:28:05,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-06-05 22:28:06,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-06-05 22:28:06,294 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) [2021-06-05 22:28:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-06-05 22:28:06,373 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-06-05 22:28:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:06,373 INFO L482 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-06-05 22:28:06,373 INFO L483 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) [2021-06-05 22:28:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-06-05 22:28:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:06,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:06,409 INFO L554 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] [2021-06-05 22:28:06,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 22:28:06,609 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash -321373819, now seen corresponding path program 76 times [2021-06-05 22:28:06,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:06,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321163378] [2021-06-05 22:28:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:06,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:06,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321163378] [2021-06-05 22:28:06,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321163378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:06,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203789418] [2021-06-05 22:28:06,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:06,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:06,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:06,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203789418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:06,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:06,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:06,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642572224] [2021-06-05 22:28:06,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:06,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:06,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:06,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:06,768 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) [2021-06-05 22:28:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:07,001 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-06-05 22:28:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:07,002 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 [2021-06-05 22:28:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:07,076 INFO L225 Difference]: With dead ends: 64613 [2021-06-05 22:28:07,076 INFO L226 Difference]: Without dead ends: 64613 [2021-06-05 22:28:07,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-06-05 22:28:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-06-05 22:28:08,003 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) [2021-06-05 22:28:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-06-05 22:28:08,101 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-06-05 22:28:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:08,102 INFO L482 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-06-05 22:28:08,102 INFO L483 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) [2021-06-05 22:28:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-06-05 22:28:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:08,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:08,142 INFO L554 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] [2021-06-05 22:28:08,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:08,343 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash 848682181, now seen corresponding path program 77 times [2021-06-05 22:28:08,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:08,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277984197] [2021-06-05 22:28:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:08,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:08,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277984197] [2021-06-05 22:28:08,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277984197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:08,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356877007] [2021-06-05 22:28:08,375 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 [2021-06-05 22:28:08,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:28:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:08,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356877007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:08,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:08,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:08,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133000821] [2021-06-05 22:28:08,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:08,487 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) [2021-06-05 22:28:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:08,734 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-06-05 22:28:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:08,735 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 [2021-06-05 22:28:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:08,805 INFO L225 Difference]: With dead ends: 61966 [2021-06-05 22:28:08,805 INFO L226 Difference]: Without dead ends: 61870 [2021-06-05 22:28:08,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-06-05 22:28:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-06-05 22:28:09,679 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) [2021-06-05 22:28:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-06-05 22:28:09,768 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-06-05 22:28:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:09,768 INFO L482 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-06-05 22:28:09,768 INFO L483 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) [2021-06-05 22:28:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-06-05 22:28:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:09,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:09,806 INFO L554 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] [2021-06-05 22:28:10,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:28:10,007 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1688057685, now seen corresponding path program 78 times [2021-06-05 22:28:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:10,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19072217] [2021-06-05 22:28:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:10,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:10,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19072217] [2021-06-05 22:28:10,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19072217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:10,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559872626] [2021-06-05 22:28:10,050 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 [2021-06-05 22:28:10,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:28:10,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559872626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:10,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:10,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:10,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843823502] [2021-06-05 22:28:10,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:10,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:10,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:10,167 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) [2021-06-05 22:28:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:10,424 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-06-05 22:28:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:10,424 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 [2021-06-05 22:28:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:10,493 INFO L225 Difference]: With dead ends: 59554 [2021-06-05 22:28:10,493 INFO L226 Difference]: Without dead ends: 59458 [2021-06-05 22:28:10,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-06-05 22:28:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-06-05 22:28:11,405 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) [2021-06-05 22:28:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-06-05 22:28:11,488 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-06-05 22:28:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:11,488 INFO L482 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-06-05 22:28:11,488 INFO L483 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) [2021-06-05 22:28:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-06-05 22:28:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:11,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:11,524 INFO L554 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] [2021-06-05 22:28:11,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:11,725 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash -326026235, now seen corresponding path program 79 times [2021-06-05 22:28:11,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:11,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747804957] [2021-06-05 22:28:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:11,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747804957] [2021-06-05 22:28:11,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747804957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588038922] [2021-06-05 22:28:11,775 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 [2021-06-05 22:28:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:11,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:11,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588038922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:11,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:11,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:28:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656615522] [2021-06-05 22:28:11,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:28:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:28:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:28:11,901 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) [2021-06-05 22:28:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:12,434 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-06-05 22:28:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:12,434 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 [2021-06-05 22:28:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:12,497 INFO L225 Difference]: With dead ends: 59114 [2021-06-05 22:28:12,497 INFO L226 Difference]: Without dead ends: 58982 [2021-06-05 22:28:12,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-06-05 22:28:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-06-05 22:28:13,099 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) [2021-06-05 22:28:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-06-05 22:28:13,184 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-06-05 22:28:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:13,184 INFO L482 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-06-05 22:28:13,184 INFO L483 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) [2021-06-05 22:28:13,184 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-06-05 22:28:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:13,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:13,508 INFO L554 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] [2021-06-05 22:28:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:13,725 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1465776773, now seen corresponding path program 80 times [2021-06-05 22:28:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602943111] [2021-06-05 22:28:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:28:13,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602943111] [2021-06-05 22:28:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602943111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366211708] [2021-06-05 22:28:13,776 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 [2021-06-05 22:28:13,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:13,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:13,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:28:13,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366211708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:13,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:13,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536112916] [2021-06-05 22:28:13,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:13,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:13,925 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) [2021-06-05 22:28:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:14,259 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-06-05 22:28:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:28:14,259 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 [2021-06-05 22:28:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:14,341 INFO L225 Difference]: With dead ends: 69297 [2021-06-05 22:28:14,342 INFO L226 Difference]: Without dead ends: 69270 [2021-06-05 22:28:14,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:28:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-06-05 22:28:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-06-05 22:28:15,249 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) [2021-06-05 22:28:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-06-05 22:28:15,332 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-06-05 22:28:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:15,332 INFO L482 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-06-05 22:28:15,332 INFO L483 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) [2021-06-05 22:28:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-06-05 22:28:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:15,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:15,369 INFO L554 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] [2021-06-05 22:28:15,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:15,569 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash -904475993, now seen corresponding path program 81 times [2021-06-05 22:28:15,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:15,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640872795] [2021-06-05 22:28:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:15,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640872795] [2021-06-05 22:28:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640872795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601923538] [2021-06-05 22:28:15,604 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) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:15,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 22:28:15,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601923538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:15,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:15,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:15,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742222700] [2021-06-05 22:28:15,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:15,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:15,716 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) [2021-06-05 22:28:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:15,949 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-06-05 22:28:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:15,949 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 [2021-06-05 22:28:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:16,025 INFO L225 Difference]: With dead ends: 67026 [2021-06-05 22:28:16,025 INFO L226 Difference]: Without dead ends: 67023 [2021-06-05 22:28:16,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-06-05 22:28:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-06-05 22:28:16,909 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) [2021-06-05 22:28:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-06-05 22:28:17,001 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-06-05 22:28:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:17,001 INFO L482 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-06-05 22:28:17,001 INFO L483 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) [2021-06-05 22:28:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-06-05 22:28:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:17,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:17,043 INFO L554 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] [2021-06-05 22:28:17,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:17,244 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash 265580007, now seen corresponding path program 82 times [2021-06-05 22:28:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:17,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546957847] [2021-06-05 22:28:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:17,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546957847] [2021-06-05 22:28:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546957847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614065175] [2021-06-05 22:28:17,277 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 [2021-06-05 22:28:17,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:17,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:17,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:17,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614065175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:17,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:17,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:17,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060139159] [2021-06-05 22:28:17,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:17,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:17,389 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) [2021-06-05 22:28:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:17,644 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-06-05 22:28:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:17,645 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 [2021-06-05 22:28:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:17,721 INFO L225 Difference]: With dead ends: 65089 [2021-06-05 22:28:17,721 INFO L226 Difference]: Without dead ends: 65029 [2021-06-05 22:28:17,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-06-05 22:28:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-06-05 22:28:18,724 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) [2021-06-05 22:28:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-06-05 22:28:18,814 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-06-05 22:28:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:18,814 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-06-05 22:28:18,814 INFO L483 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) [2021-06-05 22:28:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-06-05 22:28:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:18,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:18,852 INFO L554 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] [2021-06-05 22:28:19,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:19,054 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:19,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2023807437, now seen corresponding path program 83 times [2021-06-05 22:28:19,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:19,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970136639] [2021-06-05 22:28:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:19,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:19,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970136639] [2021-06-05 22:28:19,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970136639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:19,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006501045] [2021-06-05 22:28:19,095 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 [2021-06-05 22:28:19,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:28:19,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006501045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:19,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:19,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:19,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405100638] [2021-06-05 22:28:19,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:19,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:19,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:19,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:19,210 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) [2021-06-05 22:28:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:19,466 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-06-05 22:28:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:19,467 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 [2021-06-05 22:28:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:19,539 INFO L225 Difference]: With dead ends: 62315 [2021-06-05 22:28:19,539 INFO L226 Difference]: Without dead ends: 62243 [2021-06-05 22:28:19,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-06-05 22:28:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-06-05 22:28:20,429 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) [2021-06-05 22:28:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-06-05 22:28:20,521 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-06-05 22:28:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:20,521 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-06-05 22:28:20,521 INFO L483 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) [2021-06-05 22:28:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-06-05 22:28:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:20,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:20,560 INFO L554 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] [2021-06-05 22:28:20,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:20,760 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash -909128409, now seen corresponding path program 84 times [2021-06-05 22:28:20,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:20,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288700031] [2021-06-05 22:28:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:20,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288700031] [2021-06-05 22:28:20,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288700031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134169608] [2021-06-05 22:28:20,806 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 [2021-06-05 22:28:20,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 22:28:20,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:20,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134169608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:20,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:20,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:28:20,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687625733] [2021-06-05 22:28:20,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:28:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:28:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:28:20,913 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) [2021-06-05 22:28:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:21,359 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-06-05 22:28:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:21,359 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 [2021-06-05 22:28:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:21,431 INFO L225 Difference]: With dead ends: 62467 [2021-06-05 22:28:21,431 INFO L226 Difference]: Without dead ends: 62335 [2021-06-05 22:28:21,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-06-05 22:28:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-06-05 22:28:22,107 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) [2021-06-05 22:28:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-06-05 22:28:22,494 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-06-05 22:28:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:22,494 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-06-05 22:28:22,494 INFO L483 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) [2021-06-05 22:28:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-06-05 22:28:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:22,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:22,532 INFO L554 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] [2021-06-05 22:28:22,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 22:28:22,733 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1791126029, now seen corresponding path program 85 times [2021-06-05 22:28:22,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:22,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492651749] [2021-06-05 22:28:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:22,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:22,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492651749] [2021-06-05 22:28:22,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492651749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:22,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235746227] [2021-06-05 22:28:22,816 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 [2021-06-05 22:28:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:22,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235746227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:22,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:22,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:28:22,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117543599] [2021-06-05 22:28:22,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:28:22,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:28:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:28:22,931 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) [2021-06-05 22:28:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:23,241 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-06-05 22:28:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:23,241 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 [2021-06-05 22:28:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:23,310 INFO L225 Difference]: With dead ends: 62011 [2021-06-05 22:28:23,311 INFO L226 Difference]: Without dead ends: 61819 [2021-06-05 22:28:23,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-06-05 22:28:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-06-05 22:28:24,155 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) [2021-06-05 22:28:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-06-05 22:28:24,245 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-06-05 22:28:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:24,246 INFO L482 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-06-05 22:28:24,246 INFO L483 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) [2021-06-05 22:28:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-06-05 22:28:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:24,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:24,287 INFO L554 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] [2021-06-05 22:28:24,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:24,487 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1714547269, now seen corresponding path program 86 times [2021-06-05 22:28:24,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:24,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904727984] [2021-06-05 22:28:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:28:24,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904727984] [2021-06-05 22:28:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904727984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364847717] [2021-06-05 22:28:24,541 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 [2021-06-05 22:28:24,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:24,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:24,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:28:24,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364847717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:24,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:24,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:28:24,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548889964] [2021-06-05 22:28:24,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:28:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:28:24,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:28:24,662 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) [2021-06-05 22:28:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:24,928 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-06-05 22:28:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:28:24,929 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 [2021-06-05 22:28:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:25,006 INFO L225 Difference]: With dead ends: 65831 [2021-06-05 22:28:25,006 INFO L226 Difference]: Without dead ends: 65774 [2021-06-05 22:28:25,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-06-05 22:28:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-06-05 22:28:25,886 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) [2021-06-05 22:28:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-06-05 22:28:25,968 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-06-05 22:28:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:25,968 INFO L482 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-06-05 22:28:25,968 INFO L483 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) [2021-06-05 22:28:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-06-05 22:28:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:26,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:26,004 INFO L554 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] [2021-06-05 22:28:26,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 22:28:26,205 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash 129559749, now seen corresponding path program 87 times [2021-06-05 22:28:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146630737] [2021-06-05 22:28:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:28:26,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:26,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146630737] [2021-06-05 22:28:26,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146630737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:26,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650346224] [2021-06-05 22:28:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:26,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:28:26,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:28:26,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650346224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:26,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:26,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744255049] [2021-06-05 22:28:26,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:26,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:26,399 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) [2021-06-05 22:28:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:26,637 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-06-05 22:28:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:28:26,638 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 [2021-06-05 22:28:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:26,706 INFO L225 Difference]: With dead ends: 61581 [2021-06-05 22:28:26,707 INFO L226 Difference]: Without dead ends: 61554 [2021-06-05 22:28:26,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-06-05 22:28:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-06-05 22:28:27,567 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) [2021-06-05 22:28:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-06-05 22:28:27,650 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-06-05 22:28:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:27,650 INFO L482 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-06-05 22:28:27,650 INFO L483 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) [2021-06-05 22:28:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-06-05 22:28:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:27,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:27,686 INFO L554 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] [2021-06-05 22:28:27,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:27,887 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash -518473861, now seen corresponding path program 88 times [2021-06-05 22:28:27,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:27,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884562986] [2021-06-05 22:28:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:28:27,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:27,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884562986] [2021-06-05 22:28:27,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884562986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:27,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248660171] [2021-06-05 22:28:27,928 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 [2021-06-05 22:28:27,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:27,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:28:28,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248660171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:28,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:28,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:28,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355346581] [2021-06-05 22:28:28,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:28,056 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) [2021-06-05 22:28:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:28,293 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-06-05 22:28:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:28:28,293 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 [2021-06-05 22:28:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:28,366 INFO L225 Difference]: With dead ends: 62633 [2021-06-05 22:28:28,366 INFO L226 Difference]: Without dead ends: 62630 [2021-06-05 22:28:28,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-06-05 22:28:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-06-05 22:28:29,221 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) [2021-06-05 22:28:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-06-05 22:28:29,307 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-06-05 22:28:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:29,307 INFO L482 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-06-05 22:28:29,307 INFO L483 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) [2021-06-05 22:28:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-06-05 22:28:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:29,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:29,344 INFO L554 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] [2021-06-05 22:28:29,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 22:28:29,545 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1653142277, now seen corresponding path program 89 times [2021-06-05 22:28:29,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:29,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802664026] [2021-06-05 22:28:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:29,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802664026] [2021-06-05 22:28:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802664026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933036766] [2021-06-05 22:28:29,589 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 [2021-06-05 22:28:29,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 22:28:29,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:29,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933036766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:29,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:29,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:28:29,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671621335] [2021-06-05 22:28:29,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:28:29,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:28:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:29,755 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) [2021-06-05 22:28:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:30,041 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-06-05 22:28:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:30,041 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 [2021-06-05 22:28:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:30,123 INFO L225 Difference]: With dead ends: 66890 [2021-06-05 22:28:30,123 INFO L226 Difference]: Without dead ends: 66890 [2021-06-05 22:28:30,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-06-05 22:28:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-06-05 22:28:31,029 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) [2021-06-05 22:28:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-06-05 22:28:31,121 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-06-05 22:28:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:31,121 INFO L482 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-06-05 22:28:31,121 INFO L483 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) [2021-06-05 22:28:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-06-05 22:28:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:31,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:31,159 INFO L554 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] [2021-06-05 22:28:31,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 22:28:31,361 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1471769019, now seen corresponding path program 90 times [2021-06-05 22:28:31,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:31,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128412985] [2021-06-05 22:28:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:31,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:31,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128412985] [2021-06-05 22:28:31,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128412985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:31,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281406079] [2021-06-05 22:28:31,401 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 [2021-06-05 22:28:31,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 22:28:31,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:28:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 22:28:31,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281406079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:31,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:31,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 22:28:31,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509938504] [2021-06-05 22:28:31,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:28:31,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:31,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:28:31,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:28:31,570 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) [2021-06-05 22:28:31,896 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 22:28:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:33,024 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-06-05 22:28:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:28:33,024 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 [2021-06-05 22:28:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:33,122 INFO L225 Difference]: With dead ends: 90468 [2021-06-05 22:28:33,122 INFO L226 Difference]: Without dead ends: 90440 [2021-06-05 22:28:33,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 865.7ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:28:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-06-05 22:28:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-06-05 22:28:34,070 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) [2021-06-05 22:28:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-06-05 22:28:34,164 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-06-05 22:28:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:34,164 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-06-05 22:28:34,164 INFO L483 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) [2021-06-05 22:28:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-06-05 22:28:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:34,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:34,209 INFO L554 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] [2021-06-05 22:28:34,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 22:28:34,409 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash 47459948, now seen corresponding path program 91 times [2021-06-05 22:28:34,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:34,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067531411] [2021-06-05 22:28:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:34,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:34,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067531411] [2021-06-05 22:28:34,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067531411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126437049] [2021-06-05 22:28:34,457 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) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:28:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 22:28:34,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126437049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:34,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:34,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 22:28:34,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48263378] [2021-06-05 22:28:34,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:28:34,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:28:34,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:28:34,558 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) [2021-06-05 22:28:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:34,812 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-06-05 22:28:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:28:34,812 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 [2021-06-05 22:28:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:34,892 INFO L225 Difference]: With dead ends: 71842 [2021-06-05 22:28:34,892 INFO L226 Difference]: Without dead ends: 71794 [2021-06-05 22:28:34,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-06-05 22:28:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-06-05 22:28:35,978 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) [2021-06-05 22:28:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-06-05 22:28:36,075 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-06-05 22:28:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:36,075 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-06-05 22:28:36,075 INFO L483 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) [2021-06-05 22:28:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-06-05 22:28:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:36,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:36,403 INFO L554 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] [2021-06-05 22:28:36,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:36,613 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:36,613 INFO L82 PathProgramCache]: Analyzing trace with hash -442650298, now seen corresponding path program 92 times [2021-06-05 22:28:36,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:36,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177008891] [2021-06-05 22:28:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:36,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:36,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177008891] [2021-06-05 22:28:36,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177008891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:36,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294345766] [2021-06-05 22:28:36,686 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 [2021-06-05 22:28:36,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:28:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 22:28:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294345766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:36,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:36,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 22:28:36,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322543539] [2021-06-05 22:28:36,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:28:36,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:36,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:28:36,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:28:36,795 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) [2021-06-05 22:28:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:37,062 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-06-05 22:28:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:37,063 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 [2021-06-05 22:28:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:37,145 INFO L225 Difference]: With dead ends: 72032 [2021-06-05 22:28:37,145 INFO L226 Difference]: Without dead ends: 71944 [2021-06-05 22:28:37,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-06-05 22:28:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-06-05 22:28:38,153 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) [2021-06-05 22:28:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-06-05 22:28:38,253 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-06-05 22:28:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:38,253 INFO L482 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-06-05 22:28:38,253 INFO L483 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) [2021-06-05 22:28:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-06-05 22:28:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:28:38,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:38,292 INFO L554 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] [2021-06-05 22:28:38,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 22:28:38,494 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:38,494 INFO L82 PathProgramCache]: Analyzing trace with hash 361914028, now seen corresponding path program 93 times [2021-06-05 22:28:38,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:38,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390587309] [2021-06-05 22:28:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:38,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390587309] [2021-06-05 22:28:38,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390587309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586397221] [2021-06-05 22:28:38,555 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 [2021-06-05 22:28:38,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:28:38,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:28:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 22:28:38,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586397221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:38,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:38,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 22:28:38,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964211737] [2021-06-05 22:28:38,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:38,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:38,739 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) [2021-06-05 22:28:40,119 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 22:28:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:40,842 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-06-05 22:28:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 22:28:40,845 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 [2021-06-05 22:28:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:41,032 INFO L225 Difference]: With dead ends: 139029 [2021-06-05 22:28:41,038 INFO L226 Difference]: Without dead ends: 138261 [2021-06-05 22:28:41,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 1087.5ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 22:28:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-06-05 22:28:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-06-05 22:28:42,642 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) [2021-06-05 22:28:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-06-05 22:28:42,800 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-06-05 22:28:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:42,800 INFO L482 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-06-05 22:28:42,800 INFO L483 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) [2021-06-05 22:28:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-06-05 22:28:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:28:42,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:42,870 INFO L554 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] [2021-06-05 22:28:43,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:43,071 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2025977669, now seen corresponding path program 94 times [2021-06-05 22:28:43,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:43,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141476578] [2021-06-05 22:28:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:43,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141476578] [2021-06-05 22:28:43,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141476578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:43,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377342727] [2021-06-05 22:28:43,177 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 [2021-06-05 22:28:43,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:43,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:28:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377342727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:43,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:43,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 22:28:43,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004831984] [2021-06-05 22:28:43,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:28:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:43,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:28:43,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:28:43,682 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) [2021-06-05 22:28:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:44,304 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-06-05 22:28:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:44,304 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 [2021-06-05 22:28:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:44,464 INFO L225 Difference]: With dead ends: 133769 [2021-06-05 22:28:44,464 INFO L226 Difference]: Without dead ends: 133551 [2021-06-05 22:28:44,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:28:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-06-05 22:28:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-06-05 22:28:46,561 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) [2021-06-05 22:28:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-06-05 22:28:46,781 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-06-05 22:28:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,781 INFO L482 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-06-05 22:28:46,781 INFO L483 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) [2021-06-05 22:28:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-06-05 22:28:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:28:46,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,862 INFO L554 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] [2021-06-05 22:28:47,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 22:28:47,064 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1940313489, now seen corresponding path program 95 times [2021-06-05 22:28:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:47,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123101680] [2021-06-05 22:28:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:47,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:47,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123101680] [2021-06-05 22:28:47,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123101680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:47,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035961967] [2021-06-05 22:28:47,110 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 [2021-06-05 22:28:47,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:28:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:28:47,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035961967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:47,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:47,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:47,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632664133] [2021-06-05 22:28:47,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:47,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:47,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:47,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:47,250 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) [2021-06-05 22:28:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:47,689 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-06-05 22:28:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:47,689 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 [2021-06-05 22:28:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:48,339 INFO L225 Difference]: With dead ends: 133389 [2021-06-05 22:28:48,339 INFO L226 Difference]: Without dead ends: 133389 [2021-06-05 22:28:48,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-06-05 22:28:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-06-05 22:28:49,979 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) [2021-06-05 22:28:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-06-05 22:28:50,186 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-06-05 22:28:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:50,186 INFO L482 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-06-05 22:28:50,186 INFO L483 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) [2021-06-05 22:28:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-06-05 22:28:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:28:50,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:50,263 INFO L554 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] [2021-06-05 22:28:50,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:50,463 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1246228997, now seen corresponding path program 96 times [2021-06-05 22:28:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:50,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580184426] [2021-06-05 22:28:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:50,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:50,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580184426] [2021-06-05 22:28:50,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580184426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:50,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424419186] [2021-06-05 22:28:50,511 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 [2021-06-05 22:28:50,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:28:50,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:50,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:28:50,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:50,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424419186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:50,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:50,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:50,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494710543] [2021-06-05 22:28:50,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:50,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:50,650 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) [2021-06-05 22:28:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:51,466 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-06-05 22:28:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:51,466 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 [2021-06-05 22:28:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:51,627 INFO L225 Difference]: With dead ends: 131872 [2021-06-05 22:28:51,627 INFO L226 Difference]: Without dead ends: 131866 [2021-06-05 22:28:51,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-06-05 22:28:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-06-05 22:28:53,758 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) [2021-06-05 22:28:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-06-05 22:28:53,990 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-06-05 22:28:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:53,990 INFO L482 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-06-05 22:28:53,990 INFO L483 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) [2021-06-05 22:28:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-06-05 22:28:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:28:54,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:54,062 INFO L554 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] [2021-06-05 22:28:54,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:54,263 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:54,263 INFO L82 PathProgramCache]: Analyzing trace with hash -941503377, now seen corresponding path program 97 times [2021-06-05 22:28:54,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:54,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377346048] [2021-06-05 22:28:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:54,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:54,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377346048] [2021-06-05 22:28:54,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377346048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598506902] [2021-06-05 22:28:54,308 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 [2021-06-05 22:28:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:28:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598506902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:54,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:54,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:28:54,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487878413] [2021-06-05 22:28:54,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:28:54,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:28:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:28:54,456 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) [2021-06-05 22:28:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:54,875 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-06-05 22:28:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:54,875 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 [2021-06-05 22:28:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:55,041 INFO L225 Difference]: With dead ends: 134932 [2021-06-05 22:28:55,041 INFO L226 Difference]: Without dead ends: 134930 [2021-06-05 22:28:55,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:28:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-06-05 22:28:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-06-05 22:28:57,117 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) [2021-06-05 22:28:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-06-05 22:28:57,321 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-06-05 22:28:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:57,321 INFO L482 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-06-05 22:28:57,322 INFO L483 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) [2021-06-05 22:28:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-06-05 22:28:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:28:57,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:57,402 INFO L554 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] [2021-06-05 22:28:57,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 22:28:57,603 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash -551299451, now seen corresponding path program 98 times [2021-06-05 22:28:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:57,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009447268] [2021-06-05 22:28:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:57,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009447268] [2021-06-05 22:28:57,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009447268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497977896] [2021-06-05 22:28:57,650 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 [2021-06-05 22:28:57,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:57,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:28:57,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:57,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497977896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:57,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:57,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:28:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060966272] [2021-06-05 22:28:57,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:28:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:28:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:28:57,787 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) [2021-06-05 22:28:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:58,737 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-06-05 22:28:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:58,753 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 [2021-06-05 22:28:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:58,912 INFO L225 Difference]: With dead ends: 134144 [2021-06-05 22:28:58,913 INFO L226 Difference]: Without dead ends: 134142 [2021-06-05 22:28:58,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-06-05 22:29:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-06-05 22:29:00,646 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) [2021-06-05 22:29:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-06-05 22:29:01,246 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-06-05 22:29:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:01,246 INFO L482 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-06-05 22:29:01,246 INFO L483 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) [2021-06-05 22:29:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-06-05 22:29:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:01,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:01,356 INFO L554 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] [2021-06-05 22:29:01,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:01,557 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115929, now seen corresponding path program 99 times [2021-06-05 22:29:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:01,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355571984] [2021-06-05 22:29:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:29:01,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:01,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355571984] [2021-06-05 22:29:01,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355571984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434108985] [2021-06-05 22:29:01,600 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 [2021-06-05 22:29:01,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:29:01,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:01,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:29:01,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434108985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:01,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:01,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633399792] [2021-06-05 22:29:01,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:01,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:01,719 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) [2021-06-05 22:29:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:02,123 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-06-05 22:29:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:02,123 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 [2021-06-05 22:29:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:02,285 INFO L225 Difference]: With dead ends: 134843 [2021-06-05 22:29:02,285 INFO L226 Difference]: Without dead ends: 134807 [2021-06-05 22:29:02,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-06-05 22:29:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-06-05 22:29:04,226 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) [2021-06-05 22:29:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-06-05 22:29:04,435 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-06-05 22:29:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:04,435 INFO L482 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-06-05 22:29:04,435 INFO L483 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) [2021-06-05 22:29:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-06-05 22:29:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:04,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:04,514 INFO L554 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] [2021-06-05 22:29:04,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:04,714 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 128207611, now seen corresponding path program 100 times [2021-06-05 22:29:04,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:04,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311053850] [2021-06-05 22:29:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:04,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311053850] [2021-06-05 22:29:04,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311053850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578148881] [2021-06-05 22:29:04,758 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 [2021-06-05 22:29:04,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:04,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578148881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:04,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:04,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:04,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762667622] [2021-06-05 22:29:04,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:04,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:04,892 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) [2021-06-05 22:29:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:05,334 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-06-05 22:29:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:05,334 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 [2021-06-05 22:29:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:06,011 INFO L225 Difference]: With dead ends: 138462 [2021-06-05 22:29:06,012 INFO L226 Difference]: Without dead ends: 138426 [2021-06-05 22:29:06,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-06-05 22:29:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-06-05 22:29:07,737 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) [2021-06-05 22:29:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-06-05 22:29:07,950 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-06-05 22:29:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:07,950 INFO L482 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-06-05 22:29:07,950 INFO L483 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) [2021-06-05 22:29:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-06-05 22:29:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:08,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:08,032 INFO L554 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] [2021-06-05 22:29:08,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 22:29:08,256 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash 432933231, now seen corresponding path program 101 times [2021-06-05 22:29:08,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:08,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041255285] [2021-06-05 22:29:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:08,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041255285] [2021-06-05 22:29:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041255285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188325978] [2021-06-05 22:29:08,698 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 [2021-06-05 22:29:08,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:29:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:08,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188325978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:08,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:08,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:08,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002025691] [2021-06-05 22:29:08,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:08,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:08,917 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) [2021-06-05 22:29:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:09,327 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-06-05 22:29:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:09,327 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 [2021-06-05 22:29:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:09,497 INFO L225 Difference]: With dead ends: 140394 [2021-06-05 22:29:09,498 INFO L226 Difference]: Without dead ends: 140392 [2021-06-05 22:29:09,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-06-05 22:29:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-06-05 22:29:11,606 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) [2021-06-05 22:29:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-06-05 22:29:11,817 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-06-05 22:29:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:11,817 INFO L482 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-06-05 22:29:11,817 INFO L483 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) [2021-06-05 22:29:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-06-05 22:29:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:11,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:11,893 INFO L554 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] [2021-06-05 22:29:12,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 22:29:12,093 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash 823137157, now seen corresponding path program 102 times [2021-06-05 22:29:12,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:12,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286199242] [2021-06-05 22:29:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:12,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:12,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286199242] [2021-06-05 22:29:12,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286199242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:12,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785647349] [2021-06-05 22:29:12,138 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 [2021-06-05 22:29:12,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:29:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:12,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785647349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:12,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:12,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:29:12,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895806661] [2021-06-05 22:29:12,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:12,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:12,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:12,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:12,266 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) [2021-06-05 22:29:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:12,732 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-06-05 22:29:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:12,733 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 [2021-06-05 22:29:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:12,906 INFO L225 Difference]: With dead ends: 148818 [2021-06-05 22:29:12,906 INFO L226 Difference]: Without dead ends: 148800 [2021-06-05 22:29:12,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:29:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-06-05 22:29:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-06-05 22:29:15,273 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) [2021-06-05 22:29:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-06-05 22:29:15,507 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-06-05 22:29:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:15,507 INFO L482 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-06-05 22:29:15,507 INFO L483 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) [2021-06-05 22:29:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-06-05 22:29:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:15,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:15,590 INFO L554 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] [2021-06-05 22:29:15,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 22:29:15,798 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:15,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2018965209, now seen corresponding path program 103 times [2021-06-05 22:29:15,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:15,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142592340] [2021-06-05 22:29:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:16,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142592340] [2021-06-05 22:29:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142592340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561085230] [2021-06-05 22:29:16,239 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 [2021-06-05 22:29:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:16,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:16,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561085230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:16,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:16,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:29:16,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424904151] [2021-06-05 22:29:16,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:16,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:16,451 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) [2021-06-05 22:29:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:16,928 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-06-05 22:29:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:16,928 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 [2021-06-05 22:29:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:17,097 INFO L225 Difference]: With dead ends: 138086 [2021-06-05 22:29:17,097 INFO L226 Difference]: Without dead ends: 138068 [2021-06-05 22:29:17,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-06-05 22:29:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-06-05 22:29:19,240 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) [2021-06-05 22:29:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-06-05 22:29:19,454 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-06-05 22:29:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-06-05 22:29:19,454 INFO L483 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) [2021-06-05 22:29:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-06-05 22:29:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:19,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:19,543 INFO L554 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] [2021-06-05 22:29:19,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:19,744 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash 974502341, now seen corresponding path program 104 times [2021-06-05 22:29:19,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:19,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747654167] [2021-06-05 22:29:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:29:19,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:19,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747654167] [2021-06-05 22:29:19,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747654167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:19,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24610435] [2021-06-05 22:29:19,785 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 [2021-06-05 22:29:19,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:29:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24610435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:19,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:19,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:19,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165012738] [2021-06-05 22:29:19,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:19,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:19,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:19,927 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) [2021-06-05 22:29:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:20,374 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-06-05 22:29:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:20,375 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 [2021-06-05 22:29:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:20,552 INFO L225 Difference]: With dead ends: 135547 [2021-06-05 22:29:20,552 INFO L226 Difference]: Without dead ends: 135511 [2021-06-05 22:29:20,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-06-05 22:29:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-06-05 22:29:22,582 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) [2021-06-05 22:29:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-06-05 22:29:22,786 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-06-05 22:29:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:22,786 INFO L482 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-06-05 22:29:22,786 INFO L483 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) [2021-06-05 22:29:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-06-05 22:29:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:22,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:22,864 INFO L554 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] [2021-06-05 22:29:23,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 22:29:23,064 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash -14993925, now seen corresponding path program 105 times [2021-06-05 22:29:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:23,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728481402] [2021-06-05 22:29:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:23,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:23,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728481402] [2021-06-05 22:29:23,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728481402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:23,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488046286] [2021-06-05 22:29:23,111 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 [2021-06-05 22:29:23,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 22:29:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:23,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:23,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488046286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:23,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:23,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:23,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906649460] [2021-06-05 22:29:23,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:23,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:23,271 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) [2021-06-05 22:29:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:24,258 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-06-05 22:29:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:24,259 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 [2021-06-05 22:29:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:24,424 INFO L225 Difference]: With dead ends: 139258 [2021-06-05 22:29:24,424 INFO L226 Difference]: Without dead ends: 139216 [2021-06-05 22:29:24,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-06-05 22:29:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-06-05 22:29:26,632 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) [2021-06-05 22:29:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-06-05 22:29:26,871 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-06-05 22:29:26,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:26,871 INFO L482 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-06-05 22:29:26,871 INFO L483 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) [2021-06-05 22:29:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-06-05 22:29:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:26,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:26,949 INFO L554 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] [2021-06-05 22:29:27,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 22:29:27,149 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:27,149 INFO L82 PathProgramCache]: Analyzing trace with hash 289731695, now seen corresponding path program 106 times [2021-06-05 22:29:27,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:27,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098268164] [2021-06-05 22:29:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:27,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098268164] [2021-06-05 22:29:27,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098268164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881307519] [2021-06-05 22:29:27,189 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 [2021-06-05 22:29:27,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881307519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:27,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:27,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202339829] [2021-06-05 22:29:27,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:27,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:27,322 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) [2021-06-05 22:29:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:27,757 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-06-05 22:29:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:27,758 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 [2021-06-05 22:29:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:27,935 INFO L225 Difference]: With dead ends: 142694 [2021-06-05 22:29:27,935 INFO L226 Difference]: Without dead ends: 142692 [2021-06-05 22:29:27,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-06-05 22:29:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-06-05 22:29:30,093 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) [2021-06-05 22:29:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-06-05 22:29:30,305 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-06-05 22:29:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:30,305 INFO L482 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-06-05 22:29:30,305 INFO L483 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) [2021-06-05 22:29:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-06-05 22:29:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:30,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:30,386 INFO L554 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] [2021-06-05 22:29:30,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 22:29:30,586 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 679935621, now seen corresponding path program 107 times [2021-06-05 22:29:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:30,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580450429] [2021-06-05 22:29:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:30,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580450429] [2021-06-05 22:29:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580450429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205447912] [2021-06-05 22:29:30,632 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 [2021-06-05 22:29:30,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:29:30,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:30,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205447912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:30,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:29:30,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738042747] [2021-06-05 22:29:30,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:30,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:30,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:30,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:30,757 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) [2021-06-05 22:29:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:31,709 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-06-05 22:29:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:31,709 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 [2021-06-05 22:29:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:31,890 INFO L225 Difference]: With dead ends: 159426 [2021-06-05 22:29:31,890 INFO L226 Difference]: Without dead ends: 159408 [2021-06-05 22:29:31,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-06-05 22:29:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-06-05 22:29:34,057 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) [2021-06-05 22:29:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-06-05 22:29:34,310 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-06-05 22:29:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:34,310 INFO L482 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-06-05 22:29:34,310 INFO L483 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) [2021-06-05 22:29:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-06-05 22:29:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:34,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:34,391 INFO L554 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] [2021-06-05 22:29:34,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:34,592 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2132800551, now seen corresponding path program 108 times [2021-06-05 22:29:34,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:34,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811672323] [2021-06-05 22:29:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:34,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811672323] [2021-06-05 22:29:34,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811672323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755863272] [2021-06-05 22:29:34,646 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 [2021-06-05 22:29:34,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:29:34,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755863272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:34,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:29:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77812452] [2021-06-05 22:29:34,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:34,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:34,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:34,774 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) [2021-06-05 22:29:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:35,268 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-06-05 22:29:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:35,269 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 [2021-06-05 22:29:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:35,455 INFO L225 Difference]: With dead ends: 154174 [2021-06-05 22:29:35,456 INFO L226 Difference]: Without dead ends: 154136 [2021-06-05 22:29:35,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-06-05 22:29:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-06-05 22:29:37,686 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) [2021-06-05 22:29:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-06-05 22:29:37,896 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-06-05 22:29:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:37,896 INFO L482 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-06-05 22:29:37,896 INFO L483 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) [2021-06-05 22:29:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-06-05 22:29:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:37,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:37,976 INFO L554 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] [2021-06-05 22:29:38,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:38,176 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash 271329285, now seen corresponding path program 109 times [2021-06-05 22:29:38,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:38,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354888112] [2021-06-05 22:29:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:38,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354888112] [2021-06-05 22:29:38,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354888112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850373145] [2021-06-05 22:29:38,244 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 [2021-06-05 22:29:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:38,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850373145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:38,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:29:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319432895] [2021-06-05 22:29:38,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:38,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:38,382 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) [2021-06-05 22:29:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:39,623 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-06-05 22:29:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:39,624 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 [2021-06-05 22:29:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:39,843 INFO L225 Difference]: With dead ends: 139982 [2021-06-05 22:29:39,843 INFO L226 Difference]: Without dead ends: 139944 [2021-06-05 22:29:39,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-06-05 22:29:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-06-05 22:29:41,557 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) [2021-06-05 22:29:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-06-05 22:29:41,756 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-06-05 22:29:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:41,756 INFO L482 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-06-05 22:29:41,756 INFO L483 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) [2021-06-05 22:29:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-06-05 22:29:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:41,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:41,833 INFO L554 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] [2021-06-05 22:29:42,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:42,033 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1903347815, now seen corresponding path program 110 times [2021-06-05 22:29:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:42,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158237177] [2021-06-05 22:29:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:29:42,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158237177] [2021-06-05 22:29:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158237177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338835311] [2021-06-05 22:29:42,524 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 [2021-06-05 22:29:42,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:42,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:29:42,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338835311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:42,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:42,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620682083] [2021-06-05 22:29:42,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:42,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:42,688 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) [2021-06-05 22:29:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:43,084 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-06-05 22:29:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:43,085 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 [2021-06-05 22:29:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:43,243 INFO L225 Difference]: With dead ends: 135321 [2021-06-05 22:29:43,244 INFO L226 Difference]: Without dead ends: 135249 [2021-06-05 22:29:43,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-06-05 22:29:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-06-05 22:29:45,246 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) [2021-06-05 22:29:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-06-05 22:29:45,470 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-06-05 22:29:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:45,471 INFO L482 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-06-05 22:29:45,471 INFO L483 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) [2021-06-05 22:29:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-06-05 22:29:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:45,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:45,542 INFO L554 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] [2021-06-05 22:29:45,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 22:29:45,742 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1486828283, now seen corresponding path program 111 times [2021-06-05 22:29:45,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:45,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56624928] [2021-06-05 22:29:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:45,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56624928] [2021-06-05 22:29:45,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56624928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305094869] [2021-06-05 22:29:45,781 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 [2021-06-05 22:29:45,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 22:29:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:45,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305094869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:45,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:45,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942630970] [2021-06-05 22:29:45,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:45,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:45,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:45,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:45,908 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) [2021-06-05 22:29:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:46,304 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-06-05 22:29:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:46,304 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 [2021-06-05 22:29:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:46,467 INFO L225 Difference]: With dead ends: 128955 [2021-06-05 22:29:46,467 INFO L226 Difference]: Without dead ends: 128913 [2021-06-05 22:29:46,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-06-05 22:29:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-06-05 22:29:48,371 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) [2021-06-05 22:29:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-06-05 22:29:48,557 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-06-05 22:29:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:48,558 INFO L482 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-06-05 22:29:48,558 INFO L483 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) [2021-06-05 22:29:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-06-05 22:29:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:48,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:48,631 INFO L554 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] [2021-06-05 22:29:48,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 22:29:48,832 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1791553903, now seen corresponding path program 112 times [2021-06-05 22:29:48,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:48,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154254224] [2021-06-05 22:29:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:48,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:48,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154254224] [2021-06-05 22:29:48,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154254224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934422480] [2021-06-05 22:29:48,875 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 [2021-06-05 22:29:48,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:48,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:49,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934422480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:49,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:29:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732105263] [2021-06-05 22:29:49,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:49,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:49,011 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) [2021-06-05 22:29:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:49,415 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-06-05 22:29:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:49,415 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 [2021-06-05 22:29:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:49,575 INFO L225 Difference]: With dead ends: 130997 [2021-06-05 22:29:49,575 INFO L226 Difference]: Without dead ends: 130997 [2021-06-05 22:29:49,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-06-05 22:29:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-06-05 22:29:51,522 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) [2021-06-05 22:29:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-06-05 22:29:51,711 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-06-05 22:29:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:51,711 INFO L482 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-06-05 22:29:51,711 INFO L483 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) [2021-06-05 22:29:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-06-05 22:29:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:51,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:51,788 INFO L554 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] [2021-06-05 22:29:51,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 22:29:51,989 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2113209467, now seen corresponding path program 113 times [2021-06-05 22:29:51,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:51,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925306768] [2021-06-05 22:29:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:52,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:52,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925306768] [2021-06-05 22:29:52,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925306768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499936796] [2021-06-05 22:29:52,031 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 [2021-06-05 22:29:52,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:29:52,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499936796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:52,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:29:52,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386277124] [2021-06-05 22:29:52,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:52,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:52,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:52,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:52,180 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) [2021-06-05 22:29:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:52,660 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-06-05 22:29:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:52,660 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 [2021-06-05 22:29:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:53,263 INFO L225 Difference]: With dead ends: 145897 [2021-06-05 22:29:53,264 INFO L226 Difference]: Without dead ends: 145897 [2021-06-05 22:29:53,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:29:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-06-05 22:29:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-06-05 22:29:54,842 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) [2021-06-05 22:29:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-06-05 22:29:55,032 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-06-05 22:29:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:55,032 INFO L482 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-06-05 22:29:55,032 INFO L483 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) [2021-06-05 22:29:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-06-05 22:29:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:55,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:55,108 INFO L554 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] [2021-06-05 22:29:55,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 22:29:55,309 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash -660344537, now seen corresponding path program 114 times [2021-06-05 22:29:55,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:55,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692233573] [2021-06-05 22:29:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:55,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:55,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692233573] [2021-06-05 22:29:55,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692233573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514396741] [2021-06-05 22:29:55,367 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 [2021-06-05 22:29:55,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 22:29:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:55,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514396741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:55,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:29:55,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883588435] [2021-06-05 22:29:55,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:55,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:55,503 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) [2021-06-05 22:29:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:56,379 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-06-05 22:29:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:56,380 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 [2021-06-05 22:29:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:56,552 INFO L225 Difference]: With dead ends: 146309 [2021-06-05 22:29:56,552 INFO L226 Difference]: Without dead ends: 146309 [2021-06-05 22:29:56,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:29:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-06-05 22:29:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-06-05 22:29:58,256 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) [2021-06-05 22:29:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-06-05 22:29:58,926 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-06-05 22:29:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:58,927 INFO L482 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-06-05 22:29:58,927 INFO L483 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) [2021-06-05 22:29:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-06-05 22:29:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:29:58,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:58,994 INFO L554 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] [2021-06-05 22:29:59,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 22:29:59,197 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1773151493, now seen corresponding path program 115 times [2021-06-05 22:29:59,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:59,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010136572] [2021-06-05 22:29:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:59,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:59,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010136572] [2021-06-05 22:29:59,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010136572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790520550] [2021-06-05 22:29:59,260 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 [2021-06-05 22:29:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790520550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:59,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:29:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78772907] [2021-06-05 22:29:59,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:59,386 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) [2021-06-05 22:29:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:59,882 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-06-05 22:29:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:59,882 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 [2021-06-05 22:29:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:00,057 INFO L225 Difference]: With dead ends: 138029 [2021-06-05 22:30:00,057 INFO L226 Difference]: Without dead ends: 138029 [2021-06-05 22:30:00,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-06-05 22:30:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-06-05 22:30:01,978 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) [2021-06-05 22:30:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-06-05 22:30:02,185 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-06-05 22:30:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:02,185 INFO L482 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-06-05 22:30:02,185 INFO L483 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) [2021-06-05 22:30:02,185 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-06-05 22:30:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:30:02,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:02,262 INFO L554 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] [2021-06-05 22:30:02,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:02,464 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2048129063, now seen corresponding path program 116 times [2021-06-05 22:30:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:02,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159914167] [2021-06-05 22:30:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159914167] [2021-06-05 22:30:02,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159914167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171063098] [2021-06-05 22:30:02,530 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 [2021-06-05 22:30:02,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:02,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171063098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:02,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:30:02,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368055964] [2021-06-05 22:30:02,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:30:02,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:30:02,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:02,659 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) [2021-06-05 22:30:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:03,133 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-06-05 22:30:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:03,133 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 [2021-06-05 22:30:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:03,287 INFO L225 Difference]: With dead ends: 128519 [2021-06-05 22:30:03,288 INFO L226 Difference]: Without dead ends: 128519 [2021-06-05 22:30:03,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:30:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-06-05 22:30:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-06-05 22:30:05,274 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) [2021-06-05 22:30:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-06-05 22:30:05,474 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-06-05 22:30:05,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:05,475 INFO L482 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-06-05 22:30:05,475 INFO L483 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) [2021-06-05 22:30:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-06-05 22:30:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:30:05,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:05,553 INFO L554 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] [2021-06-05 22:30:05,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 22:30:05,753 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -358200709, now seen corresponding path program 117 times [2021-06-05 22:30:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:05,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796946591] [2021-06-05 22:30:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:30:05,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:05,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796946591] [2021-06-05 22:30:05,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796946591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:05,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882342202] [2021-06-05 22:30:05,821 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 [2021-06-05 22:30:05,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 22:30:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:05,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:30:05,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882342202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:05,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:05,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:30:05,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042272802] [2021-06-05 22:30:05,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:05,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:05,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:05,943 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) [2021-06-05 22:30:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:06,412 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-06-05 22:30:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:06,412 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 [2021-06-05 22:30:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:06,578 INFO L225 Difference]: With dead ends: 128191 [2021-06-05 22:30:06,578 INFO L226 Difference]: Without dead ends: 128065 [2021-06-05 22:30:06,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-06-05 22:30:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-06-05 22:30:08,515 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) [2021-06-05 22:30:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-06-05 22:30:08,724 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-06-05 22:30:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:08,725 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-06-05 22:30:08,725 INFO L483 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) [2021-06-05 22:30:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-06-05 22:30:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:30:08,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:08,806 INFO L554 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] [2021-06-05 22:30:09,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 22:30:09,007 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1595890949, now seen corresponding path program 118 times [2021-06-05 22:30:09,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:09,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081404671] [2021-06-05 22:30:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:30:09,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:09,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081404671] [2021-06-05 22:30:09,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081404671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:09,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659028774] [2021-06-05 22:30:09,060 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 [2021-06-05 22:30:09,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:09,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:30:09,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659028774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:09,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:09,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:30:09,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32355188] [2021-06-05 22:30:09,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:09,187 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) [2021-06-05 22:30:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:09,629 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-06-05 22:30:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:09,629 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 [2021-06-05 22:30:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:10,315 INFO L225 Difference]: With dead ends: 124343 [2021-06-05 22:30:10,316 INFO L226 Difference]: Without dead ends: 124247 [2021-06-05 22:30:10,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:30:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-06-05 22:30:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-06-05 22:30:11,886 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) [2021-06-05 22:30:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-06-05 22:30:12,082 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-06-05 22:30:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:12,082 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-06-05 22:30:12,082 INFO L483 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) [2021-06-05 22:30:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-06-05 22:30:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:30:12,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:12,155 INFO L554 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] [2021-06-05 22:30:12,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:12,357 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1654539205, now seen corresponding path program 119 times [2021-06-05 22:30:12,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:12,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854166593] [2021-06-05 22:30:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:30:12,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854166593] [2021-06-05 22:30:12,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854166593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711691308] [2021-06-05 22:30:12,403 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 [2021-06-05 22:30:12,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:30:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:12,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:30:12,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711691308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:12,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:30:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781755398] [2021-06-05 22:30:12,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:12,528 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) [2021-06-05 22:30:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:13,377 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-06-05 22:30:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:13,377 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 [2021-06-05 22:30:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:13,535 INFO L225 Difference]: With dead ends: 123893 [2021-06-05 22:30:13,535 INFO L226 Difference]: Without dead ends: 123827 [2021-06-05 22:30:13,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-06-05 22:30:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-06-05 22:30:15,109 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) [2021-06-05 22:30:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-06-05 22:30:15,304 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-06-05 22:30:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:15,304 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-06-05 22:30:15,304 INFO L483 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) [2021-06-05 22:30:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-06-05 22:30:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:30:15,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:15,382 INFO L554 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] [2021-06-05 22:30:15,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:15,583 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 189567813, now seen corresponding path program 120 times [2021-06-05 22:30:15,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:15,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969677384] [2021-06-05 22:30:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:30:15,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969677384] [2021-06-05 22:30:15,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969677384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449674830] [2021-06-05 22:30:15,630 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 [2021-06-05 22:30:15,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 22:30:15,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:30:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-06-05 22:30:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449674830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:15,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:30:15,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764169607] [2021-06-05 22:30:15,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:15,857 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) [2021-06-05 22:30:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:17,796 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-06-05 22:30:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 22:30:17,796 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 [2021-06-05 22:30:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:18,070 INFO L225 Difference]: With dead ends: 203383 [2021-06-05 22:30:18,070 INFO L226 Difference]: Without dead ends: 203092 [2021-06-05 22:30:18,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:30:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-06-05 22:30:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-06-05 22:30:20,496 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) [2021-06-05 22:30:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-06-05 22:30:20,760 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-06-05 22:30:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:20,760 INFO L482 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-06-05 22:30:20,760 INFO L483 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) [2021-06-05 22:30:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-06-05 22:30:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:30:21,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:21,356 INFO L554 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] [2021-06-05 22:30:21,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,557 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1785917094, now seen corresponding path program 121 times [2021-06-05 22:30:21,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:21,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131864594] [2021-06-05 22:30:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:21,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131864594] [2021-06-05 22:30:21,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131864594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187991381] [2021-06-05 22:30:21,649 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 [2021-06-05 22:30:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:30:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-05 22:30:21,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187991381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:21,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-06-05 22:30:21,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598783659] [2021-06-05 22:30:21,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:30:21,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:21,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:30:21,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:21,780 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) [2021-06-05 22:30:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:22,456 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-06-05 22:30:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:22,456 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 [2021-06-05 22:30:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:22,650 INFO L225 Difference]: With dead ends: 163078 [2021-06-05 22:30:22,651 INFO L226 Difference]: Without dead ends: 162830 [2021-06-05 22:30:22,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:30:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-06-05 22:30:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-06-05 22:30:24,928 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) [2021-06-05 22:30:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-06-05 22:30:25,193 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-06-05 22:30:25,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:25,193 INFO L482 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-06-05 22:30:25,193 INFO L483 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) [2021-06-05 22:30:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-06-05 22:30:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:25,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:25,333 INFO L554 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] [2021-06-05 22:30:25,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 22:30:25,533 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash -316262490, now seen corresponding path program 122 times [2021-06-05 22:30:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:25,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440225940] [2021-06-05 22:30:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440225940] [2021-06-05 22:30:25,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440225940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140598553] [2021-06-05 22:30:25,642 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 [2021-06-05 22:30:25,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:25,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:30:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140598553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:25,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 22:30:25,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145476781] [2021-06-05 22:30:25,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:30:25,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:30:25,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:25,801 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) [2021-06-05 22:30:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:27,104 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-06-05 22:30:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:27,104 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 [2021-06-05 22:30:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:27,320 INFO L225 Difference]: With dead ends: 169486 [2021-06-05 22:30:27,320 INFO L226 Difference]: Without dead ends: 169486 [2021-06-05 22:30:27,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-06-05 22:30:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-06-05 22:30:29,746 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) [2021-06-05 22:30:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-06-05 22:30:30,032 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-06-05 22:30:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:30,032 INFO L482 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-06-05 22:30:30,032 INFO L483 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) [2021-06-05 22:30:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-06-05 22:30:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:30,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:30,181 INFO L554 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] [2021-06-05 22:30:30,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 22:30:30,381 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash -342094170, now seen corresponding path program 123 times [2021-06-05 22:30:30,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:30,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328670960] [2021-06-05 22:30:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:30,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328670960] [2021-06-05 22:30:30,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328670960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416309384] [2021-06-05 22:30:30,447 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 [2021-06-05 22:30:30,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:30:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:30:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416309384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:30,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:30:30,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668662371] [2021-06-05 22:30:30,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:30,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:30,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:30,587 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) [2021-06-05 22:30:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:31,717 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-06-05 22:30:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:31,718 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 [2021-06-05 22:30:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:31,899 INFO L225 Difference]: With dead ends: 159720 [2021-06-05 22:30:31,899 INFO L226 Difference]: Without dead ends: 159716 [2021-06-05 22:30:31,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-06-05 22:30:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-06-05 22:30:34,188 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) [2021-06-05 22:30:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-06-05 22:30:34,936 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-06-05 22:30:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:34,937 INFO L482 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-06-05 22:30:34,937 INFO L483 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) [2021-06-05 22:30:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-06-05 22:30:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:35,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:35,104 INFO L554 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] [2021-06-05 22:30:35,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,327 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:35,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1880023924, now seen corresponding path program 124 times [2021-06-05 22:30:35,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:35,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305581763] [2021-06-05 22:30:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:35,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305581763] [2021-06-05 22:30:35,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305581763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118509996] [2021-06-05 22:30:35,398 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:30:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:30:35,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118509996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:35,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-06-05 22:30:35,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976406700] [2021-06-05 22:30:35,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:35,635 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) [2021-06-05 22:30:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:36,498 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-06-05 22:30:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:36,499 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 [2021-06-05 22:30:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:36,741 INFO L225 Difference]: With dead ends: 164918 [2021-06-05 22:30:36,741 INFO L226 Difference]: Without dead ends: 164914 [2021-06-05 22:30:36,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:30:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-06-05 22:30:38,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-06-05 22:30:39,082 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) [2021-06-05 22:30:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-06-05 22:30:39,351 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-06-05 22:30:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:39,352 INFO L482 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-06-05 22:30:39,352 INFO L483 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) [2021-06-05 22:30:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-06-05 22:30:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:39,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:39,496 INFO L554 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] [2021-06-05 22:30:39,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 22:30:39,697 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1015661798, now seen corresponding path program 125 times [2021-06-05 22:30:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:39,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045084678] [2021-06-05 22:30:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:39,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045084678] [2021-06-05 22:30:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045084678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602681209] [2021-06-05 22:30:39,754 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 [2021-06-05 22:30:39,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:30:39,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:40,309 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 22:30:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:30:40,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602681209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:40,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-06-05 22:30:40,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493324507] [2021-06-05 22:30:40,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:40,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:40,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:40,493 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) [2021-06-05 22:30:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:41,333 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-06-05 22:30:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:41,333 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 [2021-06-05 22:30:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:41,523 INFO L225 Difference]: With dead ends: 162401 [2021-06-05 22:30:41,523 INFO L226 Difference]: Without dead ends: 162246 [2021-06-05 22:30:41,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-06-05 22:30:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-06-05 22:30:43,729 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) [2021-06-05 22:30:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-06-05 22:30:43,981 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-06-05 22:30:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:43,982 INFO L482 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-06-05 22:30:43,982 INFO L483 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) [2021-06-05 22:30:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-06-05 22:30:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:44,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:44,130 INFO L554 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] [2021-06-05 22:30:44,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 22:30:44,331 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash 381795686, now seen corresponding path program 126 times [2021-06-05 22:30:44,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:44,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380034847] [2021-06-05 22:30:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:30:44,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:44,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380034847] [2021-06-05 22:30:44,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380034847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281665708] [2021-06-05 22:30:44,374 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 [2021-06-05 22:30:44,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 22:30:44,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:44,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:30:44,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:30:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281665708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:44,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:30:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069511868] [2021-06-05 22:30:44,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:44,520 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) [2021-06-05 22:30:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:45,660 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-06-05 22:30:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:45,660 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 [2021-06-05 22:30:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:45,880 INFO L225 Difference]: With dead ends: 187447 [2021-06-05 22:30:45,880 INFO L226 Difference]: Without dead ends: 187447 [2021-06-05 22:30:45,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-06-05 22:30:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-06-05 22:30:48,252 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) [2021-06-05 22:30:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-06-05 22:30:48,543 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-06-05 22:30:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:48,543 INFO L482 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-06-05 22:30:48,543 INFO L483 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) [2021-06-05 22:30:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-06-05 22:30:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:48,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:48,688 INFO L554 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] [2021-06-05 22:30:48,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 22:30:48,888 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1887951014, now seen corresponding path program 127 times [2021-06-05 22:30:48,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:48,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536680893] [2021-06-05 22:30:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:30:48,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:48,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536680893] [2021-06-05 22:30:48,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536680893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349544384] [2021-06-05 22:30:48,939 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 [2021-06-05 22:30:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:30:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:30:49,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349544384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:49,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:49,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 22:30:49,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811383658] [2021-06-05 22:30:49,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:49,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:49,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:49,077 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) [2021-06-05 22:30:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:50,300 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-06-05 22:30:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:50,301 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 [2021-06-05 22:30:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:50,534 INFO L225 Difference]: With dead ends: 195387 [2021-06-05 22:30:50,534 INFO L226 Difference]: Without dead ends: 195323 [2021-06-05 22:30:50,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-06-05 22:30:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-06-05 22:30:52,952 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) [2021-06-05 22:30:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-06-05 22:30:53,215 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-06-05 22:30:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:53,215 INFO L482 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-06-05 22:30:53,215 INFO L483 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) [2021-06-05 22:30:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-06-05 22:30:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:53,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:53,347 INFO L554 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] [2021-06-05 22:30:53,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:53,547 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash -565732340, now seen corresponding path program 128 times [2021-06-05 22:30:53,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:53,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878285347] [2021-06-05 22:30:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:30:53,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:53,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878285347] [2021-06-05 22:30:53,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878285347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317161343] [2021-06-05 22:30:53,596 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 [2021-06-05 22:30:53,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:30:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317161343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:53,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 22:30:53,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668386976] [2021-06-05 22:30:53,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:53,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:53,731 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) [2021-06-05 22:30:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:54,896 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-06-05 22:30:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:54,896 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 [2021-06-05 22:30:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:55,109 INFO L225 Difference]: With dead ends: 177150 [2021-06-05 22:30:55,109 INFO L226 Difference]: Without dead ends: 177126 [2021-06-05 22:30:55,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-06-05 22:30:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-06-05 22:30:57,457 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) [2021-06-05 22:30:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-06-05 22:30:57,721 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-06-05 22:30:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-06-05 22:30:57,721 INFO L483 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) [2021-06-05 22:30:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-06-05 22:30:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:30:57,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:57,856 INFO L554 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] [2021-06-05 22:30:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:58,056 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2093645926, now seen corresponding path program 129 times [2021-06-05 22:30:58,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:58,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940319390] [2021-06-05 22:30:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:30:58,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940319390] [2021-06-05 22:30:58,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940319390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690238284] [2021-06-05 22:30:58,109 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 [2021-06-05 22:30:58,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:30:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:30:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 22:30:58,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690238284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:58,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 22:30:58,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546978466] [2021-06-05 22:30:58,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:58,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:58,348 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) [2021-06-05 22:30:59,202 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 22:31:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:00,970 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-06-05 22:31:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 22:31:00,970 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 [2021-06-05 22:31:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:01,311 INFO L225 Difference]: With dead ends: 275251 [2021-06-05 22:31:01,312 INFO L226 Difference]: Without dead ends: 275139 [2021-06-05 22:31:01,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 1467.8ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 22:31:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-06-05 22:31:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-06-05 22:31:04,677 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) [2021-06-05 22:31:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-06-05 22:31:05,599 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-06-05 22:31:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:05,599 INFO L482 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-06-05 22:31:05,599 INFO L483 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) [2021-06-05 22:31:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-06-05 22:31:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:31:05,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:05,772 INFO L554 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] [2021-06-05 22:31:05,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,979 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1967004549, now seen corresponding path program 130 times [2021-06-05 22:31:05,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:05,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639192340] [2021-06-05 22:31:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:06,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639192340] [2021-06-05 22:31:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639192340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198685672] [2021-06-05 22:31:06,035 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 [2021-06-05 22:31:06,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:06,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:31:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:06,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198685672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:06,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:06,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-06-05 22:31:06,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436052831] [2021-06-05 22:31:06,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:31:06,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:31:06,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:06,254 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) [2021-06-05 22:31:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:07,152 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-06-05 22:31:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:07,152 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 [2021-06-05 22:31:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:07,484 INFO L225 Difference]: With dead ends: 247113 [2021-06-05 22:31:07,484 INFO L226 Difference]: Without dead ends: 247095 [2021-06-05 22:31:07,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:31:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-06-05 22:31:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-06-05 22:31:10,880 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) [2021-06-05 22:31:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-06-05 22:31:11,950 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-06-05 22:31:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:11,950 INFO L482 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-06-05 22:31:11,950 INFO L483 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) [2021-06-05 22:31:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-06-05 22:31:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:31:12,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:12,073 INFO L554 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] [2021-06-05 22:31:12,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 22:31:12,274 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:12,274 INFO L82 PathProgramCache]: Analyzing trace with hash 454346087, now seen corresponding path program 131 times [2021-06-05 22:31:12,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:12,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859711273] [2021-06-05 22:31:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:31:12,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:12,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859711273] [2021-06-05 22:31:12,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859711273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027344960] [2021-06-05 22:31:12,355 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 [2021-06-05 22:31:12,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:31:12,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:31:12,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 22:31:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027344960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:12,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 22:31:12,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987924964] [2021-06-05 22:31:12,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:31:12,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:12,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:31:12,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:31:12,485 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) [2021-06-05 22:31:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:13,177 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-06-05 22:31:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:13,177 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 [2021-06-05 22:31:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:13,447 INFO L225 Difference]: With dead ends: 226999 [2021-06-05 22:31:13,447 INFO L226 Difference]: Without dead ends: 226645 [2021-06-05 22:31:13,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-06-05 22:31:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-06-05 22:31:16,847 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) [2021-06-05 22:31:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-06-05 22:31:17,264 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-06-05 22:31:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:17,264 INFO L482 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-06-05 22:31:17,264 INFO L483 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) [2021-06-05 22:31:17,264 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-06-05 22:31:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:31:18,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:18,019 INFO L554 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] [2021-06-05 22:31:18,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:18,219 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -400900165, now seen corresponding path program 132 times [2021-06-05 22:31:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:18,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409193962] [2021-06-05 22:31:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:18,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:18,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409193962] [2021-06-05 22:31:18,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409193962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:18,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288755787] [2021-06-05 22:31:18,287 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 [2021-06-05 22:31:18,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 22:31:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:31:18,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288755787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:18,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:18,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:31:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460366658] [2021-06-05 22:31:18,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:18,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:18,425 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) [2021-06-05 22:31:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:19,122 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-06-05 22:31:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:31:19,123 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 [2021-06-05 22:31:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:19,425 INFO L225 Difference]: With dead ends: 237756 [2021-06-05 22:31:19,425 INFO L226 Difference]: Without dead ends: 237672 [2021-06-05 22:31:19,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-06-05 22:31:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-06-05 22:31:22,908 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) [2021-06-05 22:31:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-06-05 22:31:24,016 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-06-05 22:31:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:24,016 INFO L482 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-06-05 22:31:24,016 INFO L483 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) [2021-06-05 22:31:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-06-05 22:31:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:31:24,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:24,236 INFO L554 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] [2021-06-05 22:31:24,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 22:31:24,460 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1535732903, now seen corresponding path program 133 times [2021-06-05 22:31:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:24,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511276132] [2021-06-05 22:31:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511276132] [2021-06-05 22:31:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511276132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755498583] [2021-06-05 22:31:24,594 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 [2021-06-05 22:31:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:31:24,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755498583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:24,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 22:31:24,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116051404] [2021-06-05 22:31:24,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:31:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:31:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:24,774 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) [2021-06-05 22:31:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:25,961 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-06-05 22:31:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:31:25,962 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 [2021-06-05 22:31:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:26,435 INFO L225 Difference]: With dead ends: 252517 [2021-06-05 22:31:26,435 INFO L226 Difference]: Without dead ends: 252517 [2021-06-05 22:31:26,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:31:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-06-05 22:31:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-06-05 22:31:30,222 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) [2021-06-05 22:31:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-06-05 22:31:31,321 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-06-05 22:31:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:31,322 INFO L482 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-06-05 22:31:31,322 INFO L483 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) [2021-06-05 22:31:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-06-05 22:31:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:31:31,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:31,498 INFO L554 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] [2021-06-05 22:31:31,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:31,712 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1737688229, now seen corresponding path program 134 times [2021-06-05 22:31:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:31,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524057875] [2021-06-05 22:31:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:31,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524057875] [2021-06-05 22:31:31,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524057875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757564410] [2021-06-05 22:31:31,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:31,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:31:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:32,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757564410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:32,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:32,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 22:31:32,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061912290] [2021-06-05 22:31:32,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:31:32,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:32,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:31:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:32,025 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) [2021-06-05 22:31:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:33,665 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-06-05 22:31:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:33,666 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 [2021-06-05 22:31:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:34,009 INFO L225 Difference]: With dead ends: 283927 [2021-06-05 22:31:34,009 INFO L226 Difference]: Without dead ends: 283661 [2021-06-05 22:31:34,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:31:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-06-05 22:31:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-06-05 22:31:38,400 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) [2021-06-05 22:31:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-06-05 22:31:38,984 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-06-05 22:31:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:38,984 INFO L482 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-06-05 22:31:38,984 INFO L483 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) [2021-06-05 22:31:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-06-05 22:31:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:31:39,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:39,194 INFO L554 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] [2021-06-05 22:31:39,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 22:31:39,395 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -232879921, now seen corresponding path program 135 times [2021-06-05 22:31:39,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:39,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743658061] [2021-06-05 22:31:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:39,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743658061] [2021-06-05 22:31:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743658061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146007681] [2021-06-05 22:31:39,468 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 [2021-06-05 22:31:39,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 22:31:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:31:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146007681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:39,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:31:39,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875825543] [2021-06-05 22:31:39,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:39,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:39,640 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) [2021-06-05 22:31:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:41,164 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-06-05 22:31:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:41,165 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 [2021-06-05 22:31:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:41,520 INFO L225 Difference]: With dead ends: 283289 [2021-06-05 22:31:41,520 INFO L226 Difference]: Without dead ends: 283289 [2021-06-05 22:31:41,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:31:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-06-05 22:31:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-06-05 22:31:45,144 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) [2021-06-05 22:31:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-06-05 22:31:46,395 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-06-05 22:31:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:46,395 INFO L482 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-06-05 22:31:46,396 INFO L483 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) [2021-06-05 22:31:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-06-05 22:31:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:31:46,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:46,591 INFO L554 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] [2021-06-05 22:31:46,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:31:46,792 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1493261733, now seen corresponding path program 136 times [2021-06-05 22:31:46,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:46,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046542300] [2021-06-05 22:31:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:46,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046542300] [2021-06-05 22:31:46,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046542300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838141881] [2021-06-05 22:31:46,847 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 [2021-06-05 22:31:46,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:46,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:31:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:46,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838141881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:46,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:31:46,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719915262] [2021-06-05 22:31:46,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:46,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:46,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:46,995 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) [2021-06-05 22:31:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:48,558 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-06-05 22:31:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:48,558 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 [2021-06-05 22:31:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:48,980 INFO L225 Difference]: With dead ends: 283158 [2021-06-05 22:31:48,980 INFO L226 Difference]: Without dead ends: 283152 [2021-06-05 22:31:48,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:31:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-06-05 22:31:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-06-05 22:31:52,736 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) [2021-06-05 22:31:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-06-05 22:31:53,963 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-06-05 22:31:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:53,963 INFO L482 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-06-05 22:31:53,963 INFO L483 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) [2021-06-05 22:31:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-06-05 22:31:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:31:54,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:54,169 INFO L554 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] [2021-06-05 22:31:54,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:54,370 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1188536113, now seen corresponding path program 137 times [2021-06-05 22:31:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:54,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314772847] [2021-06-05 22:31:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:54,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:54,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314772847] [2021-06-05 22:31:54,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314772847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98812404] [2021-06-05 22:31:54,435 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 [2021-06-05 22:31:54,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:31:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:31:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:31:54,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98812404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:54,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:31:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075590896] [2021-06-05 22:31:54,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:31:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:31:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:31:54,590 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) [2021-06-05 22:31:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:56,146 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-06-05 22:31:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:56,147 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 [2021-06-05 22:31:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:56,510 INFO L225 Difference]: With dead ends: 287744 [2021-06-05 22:31:56,510 INFO L226 Difference]: Without dead ends: 287744 [2021-06-05 22:31:56,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:31:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-06-05 22:32:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-06-05 22:32:00,758 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) [2021-06-05 22:32:01,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-06-05 22:32:01,390 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-06-05 22:32:01,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:01,390 INFO L482 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-06-05 22:32:01,390 INFO L483 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) [2021-06-05 22:32:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-06-05 22:32:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:01,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:01,597 INFO L554 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] [2021-06-05 22:32:01,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 22:32:01,797 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash -798332187, now seen corresponding path program 138 times [2021-06-05 22:32:01,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:01,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213336171] [2021-06-05 22:32:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:01,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:01,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213336171] [2021-06-05 22:32:01,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213336171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:01,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885675849] [2021-06-05 22:32:01,860 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 [2021-06-05 22:32:01,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 22:32:01,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:01,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:02,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885675849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:02,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:02,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:32:02,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514297374] [2021-06-05 22:32:02,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:32:02,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:02,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:32:02,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:32:02,015 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) [2021-06-05 22:32:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:03,584 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-06-05 22:32:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:03,585 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 [2021-06-05 22:32:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:03,939 INFO L225 Difference]: With dead ends: 287474 [2021-06-05 22:32:03,939 INFO L226 Difference]: Without dead ends: 287474 [2021-06-05 22:32:03,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-06-05 22:32:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-06-05 22:32:08,392 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) [2021-06-05 22:32:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-06-05 22:32:09,829 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-06-05 22:32:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:09,829 INFO L482 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-06-05 22:32:09,829 INFO L483 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) [2021-06-05 22:32:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-06-05 22:32:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:10,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:10,116 INFO L554 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] [2021-06-05 22:32:10,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:10,329 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash 529753287, now seen corresponding path program 139 times [2021-06-05 22:32:10,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:10,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810801047] [2021-06-05 22:32:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:32:10,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:10,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810801047] [2021-06-05 22:32:10,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810801047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:10,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418056620] [2021-06-05 22:32:10,420 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 [2021-06-05 22:32:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:32:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418056620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:10,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:10,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:32:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269963983] [2021-06-05 22:32:10,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:32:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:32:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:32:10,605 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) [2021-06-05 22:32:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:12,482 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-06-05 22:32:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:12,483 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 [2021-06-05 22:32:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:13,091 INFO L225 Difference]: With dead ends: 292897 [2021-06-05 22:32:13,091 INFO L226 Difference]: Without dead ends: 292861 [2021-06-05 22:32:13,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-06-05 22:32:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-06-05 22:32:16,901 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) [2021-06-05 22:32:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-06-05 22:32:18,202 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-06-05 22:32:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:18,203 INFO L482 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-06-05 22:32:18,203 INFO L483 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) [2021-06-05 22:32:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-06-05 22:32:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:18,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:18,425 INFO L554 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] [2021-06-05 22:32:18,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:18,626 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2053890469, now seen corresponding path program 140 times [2021-06-05 22:32:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399477848] [2021-06-05 22:32:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:32:18,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:18,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399477848] [2021-06-05 22:32:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399477848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592623930] [2021-06-05 22:32:18,691 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 [2021-06-05 22:32:18,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:18,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:18,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:32:18,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592623930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:18,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:32:18,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060384269] [2021-06-05 22:32:18,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:32:18,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:18,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:32:18,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:32:18,852 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) [2021-06-05 22:32:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:20,454 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-06-05 22:32:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:20,454 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 [2021-06-05 22:32:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:20,817 INFO L225 Difference]: With dead ends: 289842 [2021-06-05 22:32:20,817 INFO L226 Difference]: Without dead ends: 289806 [2021-06-05 22:32:20,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-06-05 22:32:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-06-05 22:32:24,365 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) [2021-06-05 22:32:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-06-05 22:32:25,687 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-06-05 22:32:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:25,687 INFO L482 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-06-05 22:32:25,687 INFO L483 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) [2021-06-05 22:32:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-06-05 22:32:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:25,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:25,891 INFO L554 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] [2021-06-05 22:32:26,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:26,091 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:26,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1749164849, now seen corresponding path program 141 times [2021-06-05 22:32:26,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:26,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931600777] [2021-06-05 22:32:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:32:26,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:26,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931600777] [2021-06-05 22:32:26,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931600777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640087278] [2021-06-05 22:32:26,144 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 [2021-06-05 22:32:26,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:32:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:32:26,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640087278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:26,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:32:26,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781730329] [2021-06-05 22:32:26,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:32:26,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:32:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:32:26,302 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) [2021-06-05 22:32:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:27,841 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-06-05 22:32:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:27,841 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 [2021-06-05 22:32:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:28,237 INFO L225 Difference]: With dead ends: 293716 [2021-06-05 22:32:28,237 INFO L226 Difference]: Without dead ends: 293716 [2021-06-05 22:32:28,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-06-05 22:32:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-06-05 22:32:32,690 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) [2021-06-05 22:32:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-06-05 22:32:33,244 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-06-05 22:32:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:33,244 INFO L482 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-06-05 22:32:33,244 INFO L483 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) [2021-06-05 22:32:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-06-05 22:32:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:33,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:33,437 INFO L554 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] [2021-06-05 22:32:33,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:33,637 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1358960923, now seen corresponding path program 142 times [2021-06-05 22:32:33,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:33,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105745552] [2021-06-05 22:32:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:32:33,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:33,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105745552] [2021-06-05 22:32:33,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105745552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:33,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510809726] [2021-06-05 22:32:33,699 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 [2021-06-05 22:32:33,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:33,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:32:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510809726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:33,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:33,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:32:33,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717317197] [2021-06-05 22:32:33,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:32:33,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:33,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:32:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:32:33,850 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) [2021-06-05 22:32:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:35,430 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-06-05 22:32:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:35,430 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 [2021-06-05 22:32:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:35,817 INFO L225 Difference]: With dead ends: 305876 [2021-06-05 22:32:35,817 INFO L226 Difference]: Without dead ends: 305876 [2021-06-05 22:32:35,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-06-05 22:32:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-06-05 22:32:40,425 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) [2021-06-05 22:32:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-06-05 22:32:41,009 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-06-05 22:32:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:41,009 INFO L482 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-06-05 22:32:41,009 INFO L483 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) [2021-06-05 22:32:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-06-05 22:32:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:41,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:41,226 INFO L554 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] [2021-06-05 22:32:41,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 22:32:41,426 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash 93904007, now seen corresponding path program 143 times [2021-06-05 22:32:41,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:41,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240339483] [2021-06-05 22:32:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:41,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:41,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240339483] [2021-06-05 22:32:41,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240339483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238441361] [2021-06-05 22:32:41,494 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 [2021-06-05 22:32:41,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 22:32:41,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:42,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238441361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:42,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:42,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:32:42,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283751290] [2021-06-05 22:32:42,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:32:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:32:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:32:42,421 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) [2021-06-05 22:32:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:43,304 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-06-05 22:32:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:43,305 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 [2021-06-05 22:32:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:43,666 INFO L225 Difference]: With dead ends: 291374 [2021-06-05 22:32:43,666 INFO L226 Difference]: Without dead ends: 291374 [2021-06-05 22:32:43,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-06-05 22:32:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-06-05 22:32:48,299 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) [2021-06-05 22:32:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-06-05 22:32:48,861 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-06-05 22:32:48,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:48,861 INFO L482 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-06-05 22:32:48,861 INFO L483 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) [2021-06-05 22:32:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-06-05 22:32:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:49,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:49,841 INFO L554 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] [2021-06-05 22:32:50,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 22:32:50,060 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash 211982491, now seen corresponding path program 144 times [2021-06-05 22:32:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:50,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944262467] [2021-06-05 22:32:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:32:50,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:50,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944262467] [2021-06-05 22:32:50,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944262467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311181780] [2021-06-05 22:32:50,114 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 [2021-06-05 22:32:50,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 22:32:50,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:50,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:50,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:32:50,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311181780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:50,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:32:50,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914825260] [2021-06-05 22:32:50,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:32:50,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:50,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:32:50,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:32:50,261 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) [2021-06-05 22:32:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:51,594 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-06-05 22:32:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:51,594 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 [2021-06-05 22:32:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:52,076 INFO L225 Difference]: With dead ends: 284381 [2021-06-05 22:32:52,076 INFO L226 Difference]: Without dead ends: 284315 [2021-06-05 22:32:52,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-06-05 22:32:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-06-05 22:32:56,534 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) [2021-06-05 22:32:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-06-05 22:32:57,184 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-06-05 22:32:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,184 INFO L482 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-06-05 22:32:57,185 INFO L483 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) [2021-06-05 22:32:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-06-05 22:32:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:32:57,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,378 INFO L554 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] [2021-06-05 22:32:57,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 22:32:57,578 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 194774565, now seen corresponding path program 145 times [2021-06-05 22:32:57,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045633090] [2021-06-05 22:32:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:32:57,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045633090] [2021-06-05 22:32:57,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045633090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117719923] [2021-06-05 22:32:57,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:32:57,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117719923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:57,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:32:57,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747208939] [2021-06-05 22:32:57,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:32:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:32:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:32:57,792 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) [2021-06-05 22:32:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:59,410 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-06-05 22:32:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:59,410 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 [2021-06-05 22:32:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:59,819 INFO L225 Difference]: With dead ends: 298839 [2021-06-05 22:32:59,820 INFO L226 Difference]: Without dead ends: 298803 [2021-06-05 22:32:59,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-06-05 22:33:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-06-05 22:33:04,181 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) [2021-06-05 22:33:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-06-05 22:33:04,841 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-06-05 22:33:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:04,841 INFO L482 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-06-05 22:33:04,841 INFO L483 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) [2021-06-05 22:33:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-06-05 22:33:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:05,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:05,070 INFO L554 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] [2021-06-05 22:33:05,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:33:05,271 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash -794721701, now seen corresponding path program 146 times [2021-06-05 22:33:05,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:05,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875661252] [2021-06-05 22:33:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:05,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:05,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875661252] [2021-06-05 22:33:05,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875661252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123163482] [2021-06-05 22:33:05,321 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 [2021-06-05 22:33:05,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:05,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:05,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:05,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123163482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:05,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:33:05,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591618687] [2021-06-05 22:33:05,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:05,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:05,474 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) [2021-06-05 22:33:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:07,110 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-06-05 22:33:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:07,110 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 [2021-06-05 22:33:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:07,531 INFO L225 Difference]: With dead ends: 294586 [2021-06-05 22:33:07,531 INFO L226 Difference]: Without dead ends: 294544 [2021-06-05 22:33:07,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-06-05 22:33:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-06-05 22:33:12,117 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) [2021-06-05 22:33:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-06-05 22:33:12,717 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-06-05 22:33:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:12,717 INFO L482 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-06-05 22:33:12,717 INFO L483 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) [2021-06-05 22:33:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-06-05 22:33:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:12,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:12,923 INFO L554 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] [2021-06-05 22:33:13,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 22:33:13,124 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -489996081, now seen corresponding path program 147 times [2021-06-05 22:33:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:13,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915669394] [2021-06-05 22:33:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:13,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:13,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915669394] [2021-06-05 22:33:13,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915669394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127227444] [2021-06-05 22:33:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:13,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 22:33:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:13,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127227444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:13,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:33:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513990896] [2021-06-05 22:33:13,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:13,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:13,330 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) [2021-06-05 22:33:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:14,918 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-06-05 22:33:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:14,919 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 [2021-06-05 22:33:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:15,326 INFO L225 Difference]: With dead ends: 301944 [2021-06-05 22:33:15,327 INFO L226 Difference]: Without dead ends: 301944 [2021-06-05 22:33:15,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-06-05 22:33:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-06-05 22:33:20,071 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) [2021-06-05 22:33:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-06-05 22:33:20,640 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-06-05 22:33:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:20,640 INFO L482 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-06-05 22:33:20,640 INFO L483 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) [2021-06-05 22:33:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-06-05 22:33:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:20,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:20,876 INFO L554 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] [2021-06-05 22:33:21,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 22:33:21,076 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:21,076 INFO L82 PathProgramCache]: Analyzing trace with hash -99792155, now seen corresponding path program 148 times [2021-06-05 22:33:21,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:21,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579708873] [2021-06-05 22:33:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:21,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:21,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579708873] [2021-06-05 22:33:21,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579708873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484080614] [2021-06-05 22:33:21,138 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) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:21,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:21,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:21,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484080614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:21,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:33:21,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332069390] [2021-06-05 22:33:21,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:21,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:21,325 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) [2021-06-05 22:33:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:22,992 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-06-05 22:33:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:22,992 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 [2021-06-05 22:33:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:23,403 INFO L225 Difference]: With dead ends: 329236 [2021-06-05 22:33:23,403 INFO L226 Difference]: Without dead ends: 329236 [2021-06-05 22:33:23,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-06-05 22:33:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-06-05 22:33:28,027 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) [2021-06-05 22:33:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-06-05 22:33:28,613 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-06-05 22:33:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:28,613 INFO L482 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-06-05 22:33:28,613 INFO L483 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) [2021-06-05 22:33:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-06-05 22:33:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:29,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:29,653 INFO L554 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] [2021-06-05 22:33:29,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:29,854 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:29,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1353072775, now seen corresponding path program 149 times [2021-06-05 22:33:29,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:29,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565145470] [2021-06-05 22:33:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:29,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:29,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565145470] [2021-06-05 22:33:29,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565145470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380706480] [2021-06-05 22:33:29,918 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 [2021-06-05 22:33:29,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:33:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:30,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380706480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:30,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:30,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:33:30,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426067274] [2021-06-05 22:33:30,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:33:30,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:33:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:30,076 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) [2021-06-05 22:33:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:31,006 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-06-05 22:33:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:31,007 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 [2021-06-05 22:33:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:32,143 INFO L225 Difference]: With dead ends: 319340 [2021-06-05 22:33:32,143 INFO L226 Difference]: Without dead ends: 319340 [2021-06-05 22:33:32,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-06-05 22:33:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-06-05 22:33:35,918 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) [2021-06-05 22:33:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-06-05 22:33:37,168 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-06-05 22:33:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:37,168 INFO L482 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-06-05 22:33:37,168 INFO L483 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) [2021-06-05 22:33:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-06-05 22:33:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:37,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:37,885 INFO L554 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] [2021-06-05 22:33:38,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,101 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -508398491, now seen corresponding path program 150 times [2021-06-05 22:33:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:38,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043257227] [2021-06-05 22:33:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:38,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043257227] [2021-06-05 22:33:38,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043257227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974971549] [2021-06-05 22:33:38,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 22:33:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974971549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:38,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 22:33:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559249579] [2021-06-05 22:33:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:38,384 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) [2021-06-05 22:33:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:39,634 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-06-05 22:33:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:39,635 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 [2021-06-05 22:33:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:40,124 INFO L225 Difference]: With dead ends: 297354 [2021-06-05 22:33:40,124 INFO L226 Difference]: Without dead ends: 297354 [2021-06-05 22:33:40,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-06-05 22:33:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-06-05 22:33:44,804 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) [2021-06-05 22:33:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617961 transitions. [2021-06-05 22:33:45,366 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617961 transitions. Word has length 96 [2021-06-05 22:33:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:45,366 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617961 transitions. [2021-06-05 22:33:45,366 INFO L483 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) [2021-06-05 22:33:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617961 transitions. [2021-06-05 22:33:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:46,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:46,253 INFO L554 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] [2021-06-05 22:33:46,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:46,476 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash 343907052, now seen corresponding path program 151 times [2021-06-05 22:33:46,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:46,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108592328] [2021-06-05 22:33:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 141 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:46,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108592328] [2021-06-05 22:33:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108592328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52122417] [2021-06-05 22:33:46,555 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 [2021-06-05 22:33:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:33:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 201 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-05 22:33:46,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52122417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:46,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:46,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 14 [2021-06-05 22:33:46,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321356393] [2021-06-05 22:33:46,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:46,693 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) [2021-06-05 22:33:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:47,656 INFO L93 Difference]: Finished difference Result 296638 states and 645293 transitions. [2021-06-05 22:33:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:47,656 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 [2021-06-05 22:33:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:48,812 INFO L225 Difference]: With dead ends: 296638 [2021-06-05 22:33:48,813 INFO L226 Difference]: Without dead ends: 296566 [2021-06-05 22:33:48,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296566 states. [2021-06-05 22:33:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296566 to 282646. [2021-06-05 22:33:52,420 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) [2021-06-05 22:33:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617865 transitions. [2021-06-05 22:33:53,717 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617865 transitions. Word has length 96 [2021-06-05 22:33:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:53,717 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617865 transitions. [2021-06-05 22:33:53,717 INFO L483 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) [2021-06-05 22:33:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617865 transitions. [2021-06-05 22:33:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:33:53,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:53,925 INFO L554 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] [2021-06-05 22:33:54,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:54,126 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912452, now seen corresponding path program 152 times [2021-06-05 22:33:54,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:54,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631888761] [2021-06-05 22:33:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 22:33:54,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:54,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631888761] [2021-06-05 22:33:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631888761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724411918] [2021-06-05 22:33:54,177 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 [2021-06-05 22:33:54,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:54,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 22:33:54,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724411918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:54,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:33:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208135657] [2021-06-05 22:33:54,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:33:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:33:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:33:54,331 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) [2021-06-05 22:33:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:55,177 INFO L93 Difference]: Finished difference Result 298171 states and 649070 transitions. [2021-06-05 22:33:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:55,177 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 [2021-06-05 22:33:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:56,340 INFO L225 Difference]: With dead ends: 298171 [2021-06-05 22:33:56,340 INFO L226 Difference]: Without dead ends: 298171 [2021-06-05 22:33:56,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298171 states. [2021-06-05 22:33:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298171 to 282022. [2021-06-05 22:33:59,977 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) [2021-06-05 22:34:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282022 states to 282022 states and 616383 transitions. [2021-06-05 22:34:01,218 INFO L78 Accepts]: Start accepts. Automaton has 282022 states and 616383 transitions. Word has length 96 [2021-06-05 22:34:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:01,218 INFO L482 AbstractCegarLoop]: Abstraction has 282022 states and 616383 transitions. [2021-06-05 22:34:01,218 INFO L483 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) [2021-06-05 22:34:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 282022 states and 616383 transitions. [2021-06-05 22:34:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:34:01,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:01,485 INFO L554 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] [2021-06-05 22:34:01,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:01,686 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash -64413626, now seen corresponding path program 153 times [2021-06-05 22:34:01,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:01,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756926773] [2021-06-05 22:34:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 124 proven. 183 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-06-05 22:34:01,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756926773] [2021-06-05 22:34:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756926773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202934294] [2021-06-05 22:34:01,732 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 [2021-06-05 22:34:01,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 22:34:01,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:01,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:34:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 22:34:02,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202934294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:02,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:02,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 22 [2021-06-05 22:34:02,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777555786] [2021-06-05 22:34:02,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:02,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:02,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:02,008 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) [2021-06-05 22:34:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:05,382 INFO L93 Difference]: Finished difference Result 527818 states and 1143066 transitions. [2021-06-05 22:34:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 22:34:05,382 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 [2021-06-05 22:34:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:06,773 INFO L225 Difference]: With dead ends: 527818 [2021-06-05 22:34:06,773 INFO L226 Difference]: Without dead ends: 527644 [2021-06-05 22:34:06,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1115.3ms TimeCoverageRelationStatistics Valid=1106, Invalid=12004, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 22:34:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527644 states. [2021-06-05 22:34:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527644 to 396232. [2021-06-05 22:34:13,741 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) [2021-06-05 22:34:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396232 states to 396232 states and 863013 transitions. [2021-06-05 22:34:14,649 INFO L78 Accepts]: Start accepts. Automaton has 396232 states and 863013 transitions. Word has length 96 [2021-06-05 22:34:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:14,649 INFO L482 AbstractCegarLoop]: Abstraction has 396232 states and 863013 transitions. [2021-06-05 22:34:14,650 INFO L483 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) [2021-06-05 22:34:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 396232 states and 863013 transitions. [2021-06-05 22:34:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:34:14,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:14,895 INFO L554 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] [2021-06-05 22:34:15,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:15,107 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1559341669, now seen corresponding path program 154 times [2021-06-05 22:34:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:15,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734470105] [2021-06-05 22:34:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:34:15,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:15,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734470105] [2021-06-05 22:34:15,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734470105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:15,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145206502] [2021-06-05 22:34:15,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:15,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:15,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:34:15,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:34:15,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145206502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:15,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:15,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:34:15,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258227171] [2021-06-05 22:34:15,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:34:15,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:15,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:34:15,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:34:15,317 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) [2021-06-05 22:34:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:17,329 INFO L93 Difference]: Finished difference Result 407321 states and 884626 transitions. [2021-06-05 22:34:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:34:17,330 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 [2021-06-05 22:34:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:17,951 INFO L225 Difference]: With dead ends: 407321 [2021-06-05 22:34:17,951 INFO L226 Difference]: Without dead ends: 407255 [2021-06-05 22:34:17,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407255 states. [2021-06-05 22:34:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407255 to 401628. [2021-06-05 22:34:25,025 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) [2021-06-05 22:34:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401628 states to 401628 states and 875425 transitions. [2021-06-05 22:34:27,153 INFO L78 Accepts]: Start accepts. Automaton has 401628 states and 875425 transitions. Word has length 96 [2021-06-05 22:34:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:27,153 INFO L482 AbstractCegarLoop]: Abstraction has 401628 states and 875425 transitions. [2021-06-05 22:34:27,153 INFO L483 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) [2021-06-05 22:34:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 401628 states and 875425 transitions. [2021-06-05 22:34:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:34:27,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:27,534 INFO L554 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] [2021-06-05 22:34:27,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:27,758 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash 408916935, now seen corresponding path program 155 times [2021-06-05 22:34:27,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:27,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408610700] [2021-06-05 22:34:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:34:27,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:27,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408610700] [2021-06-05 22:34:27,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408610700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:27,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777822908] [2021-06-05 22:34:27,820 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 [2021-06-05 22:34:27,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 22:34:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:34:27,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:34:27,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777822908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:27,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:27,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:34:27,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418482011] [2021-06-05 22:34:27,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:34:27,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:34:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:34:27,993 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) [2021-06-05 22:34:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:29,945 INFO L93 Difference]: Finished difference Result 427365 states and 929947 transitions. [2021-06-05 22:34:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:34:29,946 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 [2021-06-05 22:34:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:30,549 INFO L225 Difference]: With dead ends: 427365 [2021-06-05 22:34:30,550 INFO L226 Difference]: Without dead ends: 427293 [2021-06-05 22:34:30,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427293 states. [2021-06-05 22:34:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427293 to 403688. [2021-06-05 22:34:37,288 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) [2021-06-05 22:34:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403688 states to 403688 states and 879929 transitions. [2021-06-05 22:34:38,228 INFO L78 Accepts]: Start accepts. Automaton has 403688 states and 879929 transitions. Word has length 96 [2021-06-05 22:34:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:38,228 INFO L482 AbstractCegarLoop]: Abstraction has 403688 states and 879929 transitions. [2021-06-05 22:34:38,228 INFO L483 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) [2021-06-05 22:34:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 403688 states and 879929 transitions. [2021-06-05 22:34:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:34:39,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:39,381 INFO L554 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] [2021-06-05 22:34:39,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 22:34:39,606 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:39,606 INFO L82 PathProgramCache]: Analyzing trace with hash -7602597, now seen corresponding path program 156 times [2021-06-05 22:34:39,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:39,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735459065] [2021-06-05 22:34:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:34:39,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:39,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735459065] [2021-06-05 22:34:39,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735459065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384421531] [2021-06-05 22:34:39,655 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) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:39,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 22:34:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:39,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:34:39,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:34:39,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384421531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:39,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:34:39,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591164111] [2021-06-05 22:34:39,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:34:39,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:34:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:34:39,804 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) [2021-06-05 22:34:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:41,691 INFO L93 Difference]: Finished difference Result 425634 states and 925391 transitions. [2021-06-05 22:34:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:41,691 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 [2021-06-05 22:34:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:42,381 INFO L225 Difference]: With dead ends: 425634 [2021-06-05 22:34:42,381 INFO L226 Difference]: Without dead ends: 425592 [2021-06-05 22:34:42,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425592 states. [2021-06-05 22:34:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425592 to 412428. [2021-06-05 22:34:48,502 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) [2021-06-05 22:34:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412428 states to 412428 states and 899385 transitions. [2021-06-05 22:34:50,227 INFO L78 Accepts]: Start accepts. Automaton has 412428 states and 899385 transitions. Word has length 96 [2021-06-05 22:34:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:50,227 INFO L482 AbstractCegarLoop]: Abstraction has 412428 states and 899385 transitions. [2021-06-05 22:34:50,227 INFO L483 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) [2021-06-05 22:34:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 412428 states and 899385 transitions. [2021-06-05 22:34:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:34:50,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:50,475 INFO L554 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] [2021-06-05 22:34:50,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 22:34:50,688 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash 297123023, now seen corresponding path program 157 times [2021-06-05 22:34:50,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:50,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525841298] [2021-06-05 22:34:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:34:50,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525841298] [2021-06-05 22:34:50,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525841298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947460253] [2021-06-05 22:34:50,738 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 [2021-06-05 22:34:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:34:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:34:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947460253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:50,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:34:50,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493791729] [2021-06-05 22:34:50,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:34:50,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:50,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:34:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:34:50,892 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) [2021-06-05 22:34:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:52,813 INFO L93 Difference]: Finished difference Result 439240 states and 953108 transitions. [2021-06-05 22:34:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:52,814 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 [2021-06-05 22:34:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:53,458 INFO L225 Difference]: With dead ends: 439240 [2021-06-05 22:34:53,458 INFO L226 Difference]: Without dead ends: 439240 [2021-06-05 22:34:53,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439240 states. [2021-06-05 22:35:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439240 to 412684. [2021-06-05 22:35:00,458 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) [2021-06-05 22:35:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412684 states to 412684 states and 899825 transitions. [2021-06-05 22:35:01,416 INFO L78 Accepts]: Start accepts. Automaton has 412684 states and 899825 transitions. Word has length 96 [2021-06-05 22:35:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:01,416 INFO L482 AbstractCegarLoop]: Abstraction has 412684 states and 899825 transitions. [2021-06-05 22:35:01,417 INFO L483 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) [2021-06-05 22:35:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 412684 states and 899825 transitions. [2021-06-05 22:35:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:35:01,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:01,721 INFO L554 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] [2021-06-05 22:35:01,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 22:35:01,922 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:01,922 INFO L82 PathProgramCache]: Analyzing trace with hash 687326949, now seen corresponding path program 158 times [2021-06-05 22:35:01,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:01,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997540991] [2021-06-05 22:35:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:35:01,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:01,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997540991] [2021-06-05 22:35:01,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997540991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:01,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884483434] [2021-06-05 22:35:01,978 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) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:02,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:35:02,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:35:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884483434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:03,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:03,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:35:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128859007] [2021-06-05 22:35:03,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:35:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:35:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:35:03,021 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) [2021-06-05 22:35:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:04,969 INFO L93 Difference]: Finished difference Result 495432 states and 1073586 transitions. [2021-06-05 22:35:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:35:04,969 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 [2021-06-05 22:35:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:05,964 INFO L225 Difference]: With dead ends: 495432 [2021-06-05 22:35:05,965 INFO L226 Difference]: Without dead ends: 495432 [2021-06-05 22:35:05,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495432 states. [2021-06-05 22:35:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495432 to 413220. [2021-06-05 22:35:13,199 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) [2021-06-05 22:35:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413220 states to 413220 states and 900761 transitions. [2021-06-05 22:35:14,903 INFO L78 Accepts]: Start accepts. Automaton has 413220 states and 900761 transitions. Word has length 96 [2021-06-05 22:35:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:14,903 INFO L482 AbstractCegarLoop]: Abstraction has 413220 states and 900761 transitions. [2021-06-05 22:35:14,903 INFO L483 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) [2021-06-05 22:35:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 413220 states and 900761 transitions. [2021-06-05 22:35:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:35:15,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:15,179 INFO L554 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] [2021-06-05 22:35:15,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:15,380 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2140191879, now seen corresponding path program 159 times [2021-06-05 22:35:15,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:15,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260830264] [2021-06-05 22:35:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:35:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260830264] [2021-06-05 22:35:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260830264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567264581] [2021-06-05 22:35:15,445 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 [2021-06-05 22:35:15,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 22:35:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:35:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:35:15,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567264581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:15,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:15,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:35:15,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139165970] [2021-06-05 22:35:15,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:35:15,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:35:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:35:15,618 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) [2021-06-05 22:35:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:17,810 INFO L93 Difference]: Finished difference Result 497004 states and 1077768 transitions. [2021-06-05 22:35:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:35:17,812 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 [2021-06-05 22:35:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:18,571 INFO L225 Difference]: With dead ends: 497004 [2021-06-05 22:35:18,571 INFO L226 Difference]: Without dead ends: 497004 [2021-06-05 22:35:18,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=307, Invalid=505, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:35:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497004 states. [2021-06-05 22:35:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497004 to 413420. [2021-06-05 22:35:25,663 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) [2021-06-05 22:35:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413420 states to 413420 states and 901029 transitions. [2021-06-05 22:35:27,350 INFO L78 Accepts]: Start accepts. Automaton has 413420 states and 901029 transitions. Word has length 96 [2021-06-05 22:35:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:27,350 INFO L482 AbstractCegarLoop]: Abstraction has 413420 states and 901029 transitions. [2021-06-05 22:35:27,350 INFO L483 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) [2021-06-05 22:35:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 413420 states and 901029 transitions. [2021-06-05 22:35:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:35:27,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:27,633 INFO L554 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] [2021-06-05 22:35:27,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 22:35:27,834 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash 278720613, now seen corresponding path program 160 times [2021-06-05 22:35:27,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:27,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352848657] [2021-06-05 22:35:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:35:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352848657] [2021-06-05 22:35:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352848657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688656054] [2021-06-05 22:35:27,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:27,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:35:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:35:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688656054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:28,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:28,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 22:35:28,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255197492] [2021-06-05 22:35:28,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:35:28,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:35:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:35:28,059 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) [2021-06-05 22:35:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:30,159 INFO L93 Difference]: Finished difference Result 465380 states and 1009820 transitions. [2021-06-05 22:35:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:35:30,160 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 [2021-06-05 22:35:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:30,791 INFO L225 Difference]: With dead ends: 465380 [2021-06-05 22:35:30,791 INFO L226 Difference]: Without dead ends: 465380 [2021-06-05 22:35:30,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:35:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465380 states. [2021-06-05 22:35:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465380 to 414060. [2021-06-05 22:35:37,712 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) [2021-06-05 22:35:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414060 states to 414060 states and 902309 transitions. [2021-06-05 22:35:38,694 INFO L78 Accepts]: Start accepts. Automaton has 414060 states and 902309 transitions. Word has length 96 [2021-06-05 22:35:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:38,694 INFO L482 AbstractCegarLoop]: Abstraction has 414060 states and 902309 transitions. [2021-06-05 22:35:38,694 INFO L483 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) [2021-06-05 22:35:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 414060 states and 902309 transitions. [2021-06-05 22:35:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:35:39,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:39,854 INFO L554 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] [2021-06-05 22:35:40,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:40,054 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash 553698183, now seen corresponding path program 161 times [2021-06-05 22:35:40,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:40,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111883712] [2021-06-05 22:35:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111883712] [2021-06-05 22:35:40,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111883712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557243258] [2021-06-05 22:35:40,133 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 [2021-06-05 22:35:40,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 22:35:40,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:35:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557243258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:40,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 22:35:40,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913528647] [2021-06-05 22:35:40,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:35:40,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:35:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:35:40,298 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) [2021-06-05 22:35:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:42,260 INFO L93 Difference]: Finished difference Result 430906 states and 940689 transitions. [2021-06-05 22:35:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:35:42,261 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 [2021-06-05 22:35:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:42,847 INFO L225 Difference]: With dead ends: 430906 [2021-06-05 22:35:42,847 INFO L226 Difference]: Without dead ends: 430906 [2021-06-05 22:35:42,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:35:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430906 states. [2021-06-05 22:35:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430906 to 401228. [2021-06-05 22:35:48,895 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) [2021-06-05 22:35:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401228 states to 401228 states and 873733 transitions. [2021-06-05 22:35:51,301 INFO L78 Accepts]: Start accepts. Automaton has 401228 states and 873733 transitions. Word has length 96 [2021-06-05 22:35:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:51,301 INFO L482 AbstractCegarLoop]: Abstraction has 401228 states and 873733 transitions. [2021-06-05 22:35:51,301 INFO L483 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) [2021-06-05 22:35:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 401228 states and 873733 transitions. [2021-06-05 22:35:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:35:51,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:51,580 INFO L554 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] [2021-06-05 22:35:51,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:51,801 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 449615781, now seen corresponding path program 162 times [2021-06-05 22:35:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:51,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592377649] [2021-06-05 22:35:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:35:51,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:51,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592377649] [2021-06-05 22:35:51,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592377649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:51,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979615197] [2021-06-05 22:35:51,889 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 [2021-06-05 22:35:51,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 22:35:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:35:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:35:52,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979615197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:52,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:52,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:35:52,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452793761] [2021-06-05 22:35:52,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:35:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:35:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:35:52,117 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) [2021-06-05 22:35:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:54,482 INFO L93 Difference]: Finished difference Result 424850 states and 924011 transitions. [2021-06-05 22:35:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:35:54,483 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 [2021-06-05 22:35:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:55,383 INFO L225 Difference]: With dead ends: 424850 [2021-06-05 22:35:55,383 INFO L226 Difference]: Without dead ends: 424778 [2021-06-05 22:35:55,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424778 states. [2021-06-05 22:36:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424778 to 401892. [2021-06-05 22:36:01,661 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) [2021-06-05 22:36:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401892 states to 401892 states and 875265 transitions. [2021-06-05 22:36:03,327 INFO L78 Accepts]: Start accepts. Automaton has 401892 states and 875265 transitions. Word has length 96 [2021-06-05 22:36:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:03,327 INFO L482 AbstractCegarLoop]: Abstraction has 401892 states and 875265 transitions. [2021-06-05 22:36:03,327 INFO L483 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) [2021-06-05 22:36:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 401892 states and 875265 transitions. [2021-06-05 22:36:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:36:03,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:03,551 INFO L554 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] [2021-06-05 22:36:03,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:03,752 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash -198417829, now seen corresponding path program 163 times [2021-06-05 22:36:03,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:03,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252536930] [2021-06-05 22:36:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:03,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:03,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252536930] [2021-06-05 22:36:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252536930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:03,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253065753] [2021-06-05 22:36:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:36:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253065753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:03,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:36:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385918859] [2021-06-05 22:36:03,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:36:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:36:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:36:03,965 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) [2021-06-05 22:36:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:05,924 INFO L93 Difference]: Finished difference Result 419176 states and 910606 transitions. [2021-06-05 22:36:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:36:05,925 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 [2021-06-05 22:36:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:06,515 INFO L225 Difference]: With dead ends: 419176 [2021-06-05 22:36:06,515 INFO L226 Difference]: Without dead ends: 419134 [2021-06-05 22:36:06,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419134 states. [2021-06-05 22:36:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419134 to 407336. [2021-06-05 22:36:13,171 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) [2021-06-05 22:36:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407336 states to 407336 states and 887401 transitions. [2021-06-05 22:36:14,094 INFO L78 Accepts]: Start accepts. Automaton has 407336 states and 887401 transitions. Word has length 96 [2021-06-05 22:36:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:14,094 INFO L482 AbstractCegarLoop]: Abstraction has 407336 states and 887401 transitions. [2021-06-05 22:36:14,094 INFO L483 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) [2021-06-05 22:36:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 407336 states and 887401 transitions. [2021-06-05 22:36:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:36:14,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:14,327 INFO L554 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] [2021-06-05 22:36:14,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 22:36:14,527 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:14,527 INFO L82 PathProgramCache]: Analyzing trace with hash 106307791, now seen corresponding path program 164 times [2021-06-05 22:36:14,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:14,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940278251] [2021-06-05 22:36:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:14,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940278251] [2021-06-05 22:36:14,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940278251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028896014] [2021-06-05 22:36:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:14,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:14,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:36:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:14,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028896014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:14,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:36:14,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608826605] [2021-06-05 22:36:14,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:36:14,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:14,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:36:14,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:36:14,754 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) [2021-06-05 22:36:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:16,753 INFO L93 Difference]: Finished difference Result 432146 states and 937019 transitions. [2021-06-05 22:36:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:36:16,754 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 [2021-06-05 22:36:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:17,367 INFO L225 Difference]: With dead ends: 432146 [2021-06-05 22:36:17,367 INFO L226 Difference]: Without dead ends: 432146 [2021-06-05 22:36:17,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432146 states. [2021-06-05 22:36:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432146 to 407536. [2021-06-05 22:36:24,145 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) [2021-06-05 22:36:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407536 states to 407536 states and 887809 transitions. [2021-06-05 22:36:25,062 INFO L78 Accepts]: Start accepts. Automaton has 407536 states and 887809 transitions. Word has length 96 [2021-06-05 22:36:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:25,063 INFO L482 AbstractCegarLoop]: Abstraction has 407536 states and 887809 transitions. [2021-06-05 22:36:25,063 INFO L483 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) [2021-06-05 22:36:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 407536 states and 887809 transitions. [2021-06-05 22:36:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:36:26,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:26,187 INFO L554 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] [2021-06-05 22:36:26,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:26,404 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash 496511717, now seen corresponding path program 165 times [2021-06-05 22:36:26,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:26,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54518359] [2021-06-05 22:36:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:26,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:26,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54518359] [2021-06-05 22:36:26,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54518359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:26,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593625526] [2021-06-05 22:36:26,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:26,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 22:36:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:36:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:26,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593625526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:26,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:26,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:36:26,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297277671] [2021-06-05 22:36:26,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:36:26,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:36:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:36:26,615 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) [2021-06-05 22:36:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:28,677 INFO L93 Difference]: Finished difference Result 488982 states and 1058761 transitions. [2021-06-05 22:36:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:28,678 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 [2021-06-05 22:36:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:29,612 INFO L225 Difference]: With dead ends: 488982 [2021-06-05 22:36:29,612 INFO L226 Difference]: Without dead ends: 488982 [2021-06-05 22:36:29,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:36:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488982 states. [2021-06-05 22:36:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488982 to 408416. [2021-06-05 22:36:36,623 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) [2021-06-05 22:36:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408416 states to 408416 states and 889565 transitions. [2021-06-05 22:36:38,451 INFO L78 Accepts]: Start accepts. Automaton has 408416 states and 889565 transitions. Word has length 96 [2021-06-05 22:36:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:38,451 INFO L482 AbstractCegarLoop]: Abstraction has 408416 states and 889565 transitions. [2021-06-05 22:36:38,451 INFO L483 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) [2021-06-05 22:36:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 408416 states and 889565 transitions. [2021-06-05 22:36:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:36:38,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:38,688 INFO L554 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] [2021-06-05 22:36:38,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 22:36:38,889 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1949376647, now seen corresponding path program 166 times [2021-06-05 22:36:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:38,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092982632] [2021-06-05 22:36:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:38,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:38,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092982632] [2021-06-05 22:36:38,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092982632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:38,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891976711] [2021-06-05 22:36:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:38,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:36:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891976711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:39,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:39,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:36:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61019071] [2021-06-05 22:36:39,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:36:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:36:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:36:39,117 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) [2021-06-05 22:36:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:41,343 INFO L93 Difference]: Finished difference Result 500230 states and 1083955 transitions. [2021-06-05 22:36:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:41,343 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 [2021-06-05 22:36:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:42,071 INFO L225 Difference]: With dead ends: 500230 [2021-06-05 22:36:42,071 INFO L226 Difference]: Without dead ends: 500230 [2021-06-05 22:36:42,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=350, Invalid=580, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500230 states. [2021-06-05 22:36:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500230 to 409316. [2021-06-05 22:36:48,968 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) [2021-06-05 22:36:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409316 states to 409316 states and 891385 transitions. [2021-06-05 22:36:49,941 INFO L78 Accepts]: Start accepts. Automaton has 409316 states and 891385 transitions. Word has length 96 [2021-06-05 22:36:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:49,941 INFO L482 AbstractCegarLoop]: Abstraction has 409316 states and 891385 transitions. [2021-06-05 22:36:49,941 INFO L483 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) [2021-06-05 22:36:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 409316 states and 891385 transitions. [2021-06-05 22:36:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:36:51,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:51,107 INFO L554 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] [2021-06-05 22:36:51,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 22:36:51,321 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:51,321 INFO L82 PathProgramCache]: Analyzing trace with hash 87905381, now seen corresponding path program 167 times [2021-06-05 22:36:51,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:51,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112340364] [2021-06-05 22:36:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:51,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:51,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112340364] [2021-06-05 22:36:51,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112340364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:51,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62657852] [2021-06-05 22:36:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:51,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 22:36:51,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:51,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:36:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:36:51,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62657852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:51,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:51,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 22:36:51,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153479779] [2021-06-05 22:36:51,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:36:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:36:51,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:36:51,548 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) [2021-06-05 22:36:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:53,628 INFO L93 Difference]: Finished difference Result 484574 states and 1051121 transitions. [2021-06-05 22:36:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:53,629 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 [2021-06-05 22:36:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:54,358 INFO L225 Difference]: With dead ends: 484574 [2021-06-05 22:36:54,358 INFO L226 Difference]: Without dead ends: 484574 [2021-06-05 22:36:54,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:36:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484574 states. [2021-06-05 22:37:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484574 to 409896. [2021-06-05 22:37:00,550 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) [2021-06-05 22:37:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409896 states to 409896 states and 892481 transitions. [2021-06-05 22:37:02,160 INFO L78 Accepts]: Start accepts. Automaton has 409896 states and 892481 transitions. Word has length 96 [2021-06-05 22:37:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:02,160 INFO L482 AbstractCegarLoop]: Abstraction has 409896 states and 892481 transitions. [2021-06-05 22:37:02,160 INFO L483 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) [2021-06-05 22:37:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 409896 states and 892481 transitions. [2021-06-05 22:37:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:37:02,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:02,428 INFO L554 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] [2021-06-05 22:37:02,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 22:37:02,629 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 362882951, now seen corresponding path program 168 times [2021-06-05 22:37:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:02,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705391678] [2021-06-05 22:37:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:37:02,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:02,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705391678] [2021-06-05 22:37:02,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705391678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:02,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99170650] [2021-06-05 22:37:02,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:02,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 22:37:02,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:02,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:37:02,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:37:02,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99170650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:02,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:02,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 22:37:02,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445124790] [2021-06-05 22:37:02,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:37:02,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:02,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:37:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:37:02,862 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) [2021-06-05 22:37:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:04,923 INFO L93 Difference]: Finished difference Result 452934 states and 982423 transitions. [2021-06-05 22:37:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:04,923 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 [2021-06-05 22:37:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:05,606 INFO L225 Difference]: With dead ends: 452934 [2021-06-05 22:37:05,606 INFO L226 Difference]: Without dead ends: 452934 [2021-06-05 22:37:05,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:37:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452934 states. [2021-06-05 22:37:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452934 to 410776. [2021-06-05 22:37:12,443 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) [2021-06-05 22:37:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410776 states to 410776 states and 894241 transitions. [2021-06-05 22:37:13,388 INFO L78 Accepts]: Start accepts. Automaton has 410776 states and 894241 transitions. Word has length 96 [2021-06-05 22:37:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:13,389 INFO L482 AbstractCegarLoop]: Abstraction has 410776 states and 894241 transitions. [2021-06-05 22:37:13,389 INFO L483 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) [2021-06-05 22:37:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 410776 states and 894241 transitions. [2021-06-05 22:37:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:37:14,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:14,537 INFO L554 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] [2021-06-05 22:37:14,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 22:37:14,738 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1973198309, now seen corresponding path program 169 times [2021-06-05 22:37:14,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:14,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028225288] [2021-06-05 22:37:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:14,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:14,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028225288] [2021-06-05 22:37:14,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028225288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:14,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087614105] [2021-06-05 22:37:14,826 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:37:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:14,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087614105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:14,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:14,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 22:37:14,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975933909] [2021-06-05 22:37:14,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:37:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:37:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:37:14,979 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) [2021-06-05 22:37:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:16,938 INFO L93 Difference]: Finished difference Result 425560 states and 927070 transitions. [2021-06-05 22:37:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:37:16,939 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 [2021-06-05 22:37:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:17,524 INFO L225 Difference]: With dead ends: 425560 [2021-06-05 22:37:17,524 INFO L226 Difference]: Without dead ends: 425560 [2021-06-05 22:37:17,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425560 states. [2021-06-05 22:37:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425560 to 404836. [2021-06-05 22:37:23,366 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) [2021-06-05 22:37:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404836 states to 404836 states and 881797 transitions. [2021-06-05 22:37:25,156 INFO L78 Accepts]: Start accepts. Automaton has 404836 states and 881797 transitions. Word has length 96 [2021-06-05 22:37:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:25,156 INFO L482 AbstractCegarLoop]: Abstraction has 404836 states and 881797 transitions. [2021-06-05 22:37:25,156 INFO L483 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) [2021-06-05 22:37:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 404836 states and 881797 transitions. [2021-06-05 22:37:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:37:25,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:25,431 INFO L554 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] [2021-06-05 22:37:25,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:25,632 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2072034489, now seen corresponding path program 170 times [2021-06-05 22:37:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:25,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889303252] [2021-06-05 22:37:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:37:25,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:25,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889303252] [2021-06-05 22:37:25,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889303252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:25,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789481909] [2021-06-05 22:37:25,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:25,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:25,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:37:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 22:37:25,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789481909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:25,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:25,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 22:37:25,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733867707] [2021-06-05 22:37:25,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:37:25,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:25,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:37:25,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:37:25,855 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) [2021-06-05 22:37:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:28,015 INFO L93 Difference]: Finished difference Result 422860 states and 919321 transitions. [2021-06-05 22:37:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:28,015 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 [2021-06-05 22:37:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 22:37:28,628 INFO L225 Difference]: With dead ends: 422860 [2021-06-05 22:37:28,628 INFO L226 Difference]: Without dead ends: 422704 [2021-06-05 22:37:28,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422704 states. [2021-06-05 22:37:29,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 22:37:29,223 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:37:29,225 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:37:29,226 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:37:29,227 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:37:29 BasicIcfg [2021-06-05 22:37:29,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:37:29,227 INFO L168 Benchmark]: Toolchain (without parser) took 650968.71 ms. Allocated memory was 343.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 323.1 MB in the beginning and 6.0 GB in the end (delta: -5.6 GB). Peak memory consumption was 10.0 GB. Max. memory is 16.0 GB. [2021-06-05 22:37:29,227 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 343.9 MB. Free memory is still 324.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:37:29,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.93 ms. Allocated memory is still 343.9 MB. Free memory was 323.0 MB in the beginning and 321.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:37:29,227 INFO L168 Benchmark]: Boogie Preprocessor took 15.74 ms. Allocated memory is still 343.9 MB. Free memory was 321.5 MB in the beginning and 320.5 MB in the end (delta: 937.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:37:29,227 INFO L168 Benchmark]: RCFGBuilder took 266.35 ms. Allocated memory is still 343.9 MB. Free memory was 320.5 MB in the beginning and 309.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:37:29,227 INFO L168 Benchmark]: TraceAbstraction took 650658.75 ms. Allocated memory was 343.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 308.6 MB in the beginning and 6.0 GB in the end (delta: -5.6 GB). Peak memory consumption was 10.0 GB. Max. memory is 16.0 GB. [2021-06-05 22:37:29,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 343.9 MB. Free memory is still 324.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.93 ms. Allocated memory is still 343.9 MB. Free memory was 323.0 MB in the beginning and 321.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.74 ms. Allocated memory is still 343.9 MB. Free memory was 321.5 MB in the beginning and 320.5 MB in the end (delta: 937.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 266.35 ms. Allocated memory is still 343.9 MB. Free memory was 320.5 MB in the beginning and 309.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 650658.75 ms. Allocated memory was 343.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 308.6 MB in the beginning and 6.0 GB in the end (delta: -5.6 GB). Peak memory consumption was 10.0 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 Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 44 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 650509.1ms, OverallIterations: 183, TraceHistogramMax: 11, EmptinessCheckTime: 24468.6ms, AutomataDifference: 159349.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14079 SDtfs, 46184 SDslu, 60240 SDs, 0 SdLazy, 28099 SolverSat, 4671 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16141.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15604 GetRequests, 12236 SyntacticMatches, 100 SemanticMatches, 3268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27685 ImplicationChecksByTransitivity, 21072.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=414060occurred in iteration=173, InterpolantAutomatonStates: 3222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 391791.9ms AutomataMinimizationTime, 183 MinimizatonAttempts, 2017144 StatesRemovedByMinimization, 182 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 776.8ms SsaConstructionTime, 3658.3ms SatisfiabilityAnalysisTime, 29406.3ms InterpolantComputationTime, 23560 NumberOfCodeBlocks, 23494 NumberOfCodeBlocksAsserted, 979 NumberOfCheckSat, 23200 ConstructedInterpolants, 0 QuantifiedInterpolants, 103267 SizeOfPredicates, 356 NumberOfNonLiveVariables, 18192 ConjunctsInSsa, 2523 ConjunctsInUnsatCore, 360 InterpolantComputations, 6 PerfectInterpolantSequences, 27618/51246 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