/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:07:00,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:07:00,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:07:00,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:07:00,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:07:00,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:07:00,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:07:00,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:07:00,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:07:00,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:07:00,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:07:00,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:07:00,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:07:00,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:07:00,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:07:00,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:07:00,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:07:00,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:07:00,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:07:00,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:07:00,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:07:00,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:07:00,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:07:00,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:07:00,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:07:00,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:07:00,520 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:07:00,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:07:00,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:07:00,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:07:00,523 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:07:00,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:07:00,523 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:07:00,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:07:00,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:07:00,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:07:00,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:07:00,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:07:00,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:07:00,525 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:07:00,526 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:07:00,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:07:00,526 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:07:00,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:07:00,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:07:00,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:07:00,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:07:00,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:07:00,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:00,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:07:00,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:07:00,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:07:00,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:07:00,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:07:00,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:07:00,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:07:00,807 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:07:00,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:07:00,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:07:00,829 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:07:00,830 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:07:00,830 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2019-11-23 22:07:00,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7093e4b9/81f339c0cfbe480bb519075ba22be85e/FLAG71de1d48e [2019-11-23 22:07:01,375 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:07:01,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2019-11-23 22:07:01,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7093e4b9/81f339c0cfbe480bb519075ba22be85e/FLAG71de1d48e [2019-11-23 22:07:01,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7093e4b9/81f339c0cfbe480bb519075ba22be85e [2019-11-23 22:07:01,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:07:01,754 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:07:01,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:01,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:07:01,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:07:01,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:01" (1/1) ... [2019-11-23 22:07:01,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5044656e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:01, skipping insertion in model container [2019-11-23 22:07:01,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:01" (1/1) ... [2019-11-23 22:07:01,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:07:01,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:07:01,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:01,973 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:07:01,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:02,009 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:07:02,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02 WrapperNode [2019-11-23 22:07:02,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:02,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:02,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:07:02,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:07:02,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:02,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:07:02,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:07:02,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:07:02,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (1/1) ... [2019-11-23 22:07:02,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:07:02,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:07:02,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:07:02,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:07:02,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (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 [2019-11-23 22:07:02,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:07:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:07:02,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:07:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:07:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:07:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:07:02,367 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:07:02,367 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:07:02,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:02 BoogieIcfgContainer [2019-11-23 22:07:02,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:07:02,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:07:02,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:07:02,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:07:02,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:07:01" (1/3) ... [2019-11-23 22:07:02,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68447116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:02, skipping insertion in model container [2019-11-23 22:07:02,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:02" (2/3) ... [2019-11-23 22:07:02,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68447116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:02, skipping insertion in model container [2019-11-23 22:07:02,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:02" (3/3) ... [2019-11-23 22:07:02,377 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2019-11-23 22:07:02,384 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:07:02,390 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:07:02,400 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:07:02,421 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:07:02,421 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:07:02,421 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:07:02,421 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:07:02,422 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:07:02,422 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:07:02,422 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:07:02,422 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:07:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:07:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:07:02,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:02,439 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:07:02,439 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2019-11-23 22:07:02,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:02,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688613311] [2019-11-23 22:07:02,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688613311] [2019-11-23 22:07:02,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:02,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:07:02,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689751330] [2019-11-23 22:07:02,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:07:02,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:07:02,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:02,622 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-23 22:07:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:02,670 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-11-23 22:07:02,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:07:02,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:07:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:02,689 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:07:02,690 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:07:02,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:07:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-23 22:07:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:07:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:07:02,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-23 22:07:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:02,733 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:07:02,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:07:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:07:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:07:02,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:02,734 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:02,734 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2019-11-23 22:07:02,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:02,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229918165] [2019-11-23 22:07:02,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229918165] [2019-11-23 22:07:02,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381824258] [2019-11-23 22:07:02,804 INFO L94 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 [2019-11-23 22:07:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:02,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:07:02,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:02,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:02,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:07:02,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369056185] [2019-11-23 22:07:02,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:07:02,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:02,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:07:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:07:02,917 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2019-11-23 22:07:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:02,951 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:07:02,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:07:02,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-23 22:07:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:02,952 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:07:02,953 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:07:02,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:07:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:07:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-23 22:07:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:07:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:07:02,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-23 22:07:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:02,958 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:07:02,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:07:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:07:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:07:02,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:02,960 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:03,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,164 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2019-11-23 22:07:03,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:03,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845965396] [2019-11-23 22:07:03,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845965396] [2019-11-23 22:07:03,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724162908] [2019-11-23 22:07:03,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:03,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:03,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:07:03,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:03,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:07:03,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044045702] [2019-11-23 22:07:03,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:07:03,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:03,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:07:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:07:03,336 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2019-11-23 22:07:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:03,372 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-23 22:07:03,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:07:03,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 22:07:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:03,373 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:07:03,374 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:07:03,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:07:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:07:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 22:07:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:07:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-23 22:07:03,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-11-23 22:07:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:03,378 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-23 22:07:03,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:07:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-23 22:07:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:07:03,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:03,379 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:03,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,580 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2019-11-23 22:07:03,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:03,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276493534] [2019-11-23 22:07:03,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276493534] [2019-11-23 22:07:03,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321006134] [2019-11-23 22:07:03,650 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:07:03,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:03,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:07:03,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:03,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:03,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:07:03,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580001525] [2019-11-23 22:07:03,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:07:03,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:03,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:07:03,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:03,720 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-11-23 22:07:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:03,771 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-23 22:07:03,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:07:03,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-23 22:07:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:03,774 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:07:03,774 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:07:03,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:07:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 22:07:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:07:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:07:03,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-23 22:07:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:03,786 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:07:03,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:07:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:07:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:07:03,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:03,789 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:03,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:03,992 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2019-11-23 22:07:03,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:03,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716467781] [2019-11-23 22:07:03,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716467781] [2019-11-23 22:07:04,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789872803] [2019-11-23 22:07:04,098 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:04,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:04,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:07:04,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:04,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:07:04,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417067812] [2019-11-23 22:07:04,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:07:04,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:07:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:04,184 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-11-23 22:07:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:04,231 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-23 22:07:04,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:07:04,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:07:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:04,232 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:07:04,232 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:07:04,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:07:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:07:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:07:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:07:04,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-23 22:07:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:04,237 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:07:04,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:07:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:07:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:07:04,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,238 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,444 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2019-11-23 22:07:04,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537866209] [2019-11-23 22:07:04,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537866209] [2019-11-23 22:07:04,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836704162] [2019-11-23 22:07:04,546 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:07:04,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:04,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:07:04,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:04,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:07:04,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571898736] [2019-11-23 22:07:04,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:07:04,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:07:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:04,621 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-11-23 22:07:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:04,660 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:07:04,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:07:04,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-23 22:07:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:04,662 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:07:04,662 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:07:04,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:07:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 22:07:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:07:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:07:04,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-11-23 22:07:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:04,667 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:07:04,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:07:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:07:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:07:04,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,668 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,872 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2019-11-23 22:07:04,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903976380] [2019-11-23 22:07:04,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903976380] [2019-11-23 22:07:04,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028777452] [2019-11-23 22:07:04,964 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,013 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:07:05,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:05,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:07:05,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326565096] [2019-11-23 22:07:05,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:07:05,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:07:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:05,030 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2019-11-23 22:07:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:05,085 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:07:05,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:07:05,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-23 22:07:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:05,088 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:07:05,088 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:07:05,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:07:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 22:07:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:07:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:07:05,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-11-23 22:07:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:05,096 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:07:05,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:07:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:07:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:07:05,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:05,098 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:05,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,302 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2019-11-23 22:07:05,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:05,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115119683] [2019-11-23 22:07:05,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115119683] [2019-11-23 22:07:05,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760547109] [2019-11-23 22:07:05,436 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:07:05,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536209690] [2019-11-23 22:07:05,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:07:05,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:07:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:05,500 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2019-11-23 22:07:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:05,563 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:07:05,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:07:05,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-11-23 22:07:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:05,564 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:07:05,564 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:07:05,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:07:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 22:07:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:07:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:07:05,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2019-11-23 22:07:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:05,572 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:07:05,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:07:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:07:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:07:05,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:05,573 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:05,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,774 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2019-11-23 22:07:05,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:05,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010659037] [2019-11-23 22:07:05,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010659037] [2019-11-23 22:07:05,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251431042] [2019-11-23 22:07:05,914 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:05,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:05,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:07:05,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644113454] [2019-11-23 22:07:05,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:07:05,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:07:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:05,985 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2019-11-23 22:07:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:06,043 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:07:06,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:07:06,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-23 22:07:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:06,044 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:07:06,044 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:07:06,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:07:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-23 22:07:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:07:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:07:06,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2019-11-23 22:07:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:06,050 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:07:06,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:07:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:07:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:07:06,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:06,051 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:06,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,255 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:06,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2019-11-23 22:07:06,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:06,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133954721] [2019-11-23 22:07:06,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133954721] [2019-11-23 22:07:06,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094008310] [2019-11-23 22:07:06,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:07:06,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:06,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:07:06,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:06,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:07:06,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060800973] [2019-11-23 22:07:06,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:07:06,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:07:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:06,546 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2019-11-23 22:07:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:06,602 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-23 22:07:06,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:07:06,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2019-11-23 22:07:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:06,604 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:07:06,604 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:07:06,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:07:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:07:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:07:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:07:06,613 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2019-11-23 22:07:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:06,615 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:07:06,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:07:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:07:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:07:06,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:06,616 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:06,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,823 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2019-11-23 22:07:06,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:06,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078955038] [2019-11-23 22:07:06,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078955038] [2019-11-23 22:07:06,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148429674] [2019-11-23 22:07:06,941 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,982 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:06,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:06,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:07:06,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:07,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:07:07,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469635809] [2019-11-23 22:07:07,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:07:07,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:07:07,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:07,007 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2019-11-23 22:07:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:07,055 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:07:07,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:07:07,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2019-11-23 22:07:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:07,056 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:07:07,057 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:07:07,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:07:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 22:07:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:07:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:07:07,061 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2019-11-23 22:07:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:07,061 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:07:07,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:07:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:07:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:07:07,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:07,063 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:07,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,270 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2019-11-23 22:07:07,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:07,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279508809] [2019-11-23 22:07:07,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279508809] [2019-11-23 22:07:07,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54980683] [2019-11-23 22:07:07,418 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:07:07,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:07,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:07:07,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:07,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:07:07,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101614159] [2019-11-23 22:07:07,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:07:07,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:07:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:07,526 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2019-11-23 22:07:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:07,587 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-23 22:07:07,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:07:07,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-11-23 22:07:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:07,589 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:07:07,589 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:07:07,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:07:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:07:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:07:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:07:07,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2019-11-23 22:07:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:07,594 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:07:07,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:07:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:07:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:07:07,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:07,596 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:07,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,800 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2019-11-23 22:07:07,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:07,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30946229] [2019-11-23 22:07:07,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30946229] [2019-11-23 22:07:07,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822903991] [2019-11-23 22:07:07,956 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,096 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:07:08,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:08,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:07:08,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:08,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:07:08,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003116483] [2019-11-23 22:07:08,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:07:08,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:07:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:08,119 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2019-11-23 22:07:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,171 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-23 22:07:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:07:08,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-23 22:07:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,173 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:07:08,173 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:07:08,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:07:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 22:07:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:07:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:07:08,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2019-11-23 22:07:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,180 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:07:08,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:07:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:07:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:07:08,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,181 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,383 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2019-11-23 22:07:08,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110375869] [2019-11-23 22:07:08,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110375869] [2019-11-23 22:07:08,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454508238] [2019-11-23 22:07:08,560 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:07:08,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:08,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:07:08,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923860867] [2019-11-23 22:07:08,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:07:08,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:07:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:08,679 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2019-11-23 22:07:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,756 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:07:08,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:07:08,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-11-23 22:07:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,759 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:07:08,759 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:07:08,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:07:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:07:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:07:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:07:08,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2019-11-23 22:07:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,774 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:07:08,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:07:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:07:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:07:08,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,778 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,983 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2019-11-23 22:07:08,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472653488] [2019-11-23 22:07:08,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472653488] [2019-11-23 22:07:09,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870738410] [2019-11-23 22:07:09,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:09,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:07:09,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050011201] [2019-11-23 22:07:09,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:07:09,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:07:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:09,249 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2019-11-23 22:07:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,305 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:07:09,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:07:09,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2019-11-23 22:07:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,306 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:07:09,307 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:07:09,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:07:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 22:07:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:07:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:07:09,312 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2019-11-23 22:07:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,313 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:07:09,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:07:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:07:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:07:09,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,314 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:09,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,518 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:09,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2019-11-23 22:07:09,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:09,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184023134] [2019-11-23 22:07:09,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184023134] [2019-11-23 22:07:09,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530211927] [2019-11-23 22:07:09,695 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:07:09,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:07:09,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768577255] [2019-11-23 22:07:09,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:07:09,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:07:09,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:09,999 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2019-11-23 22:07:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,066 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:07:10,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:07:10,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-11-23 22:07:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,067 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:07:10,067 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:07:10,068 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:07:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 22:07:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:07:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:07:10,072 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2019-11-23 22:07:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,073 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:07:10,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:07:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:07:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:07:10,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,074 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,278 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2019-11-23 22:07:10,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846883149] [2019-11-23 22:07:10,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846883149] [2019-11-23 22:07:10,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800725770] [2019-11-23 22:07:10,472 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:10,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:10,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:07:10,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:10,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:07:10,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829983809] [2019-11-23 22:07:10,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:07:10,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:07:10,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:10,567 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2019-11-23 22:07:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,652 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:07:10,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:07:10,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2019-11-23 22:07:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,654 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:07:10,654 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:07:10,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:07:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 22:07:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:07:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:07:10,660 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2019-11-23 22:07:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,661 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:07:10,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:07:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:07:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:07:10,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,663 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,867 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2019-11-23 22:07:10,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539366130] [2019-11-23 22:07:10,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:11,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539366130] [2019-11-23 22:07:11,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490272381] [2019-11-23 22:07:11,104 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:07:11,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:11,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:11,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:07:11,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153375614] [2019-11-23 22:07:11,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:07:11,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:07:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:11,288 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2019-11-23 22:07:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:11,357 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:07:11,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:07:11,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2019-11-23 22:07:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:11,358 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:07:11,358 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:07:11,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:07:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-11-23 22:07:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:07:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:07:11,364 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2019-11-23 22:07:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:11,364 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:07:11,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:07:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:07:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:07:11,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:11,365 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,569 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2019-11-23 22:07:11,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632941145] [2019-11-23 22:07:11,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:11,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632941145] [2019-11-23 22:07:11,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566227297] [2019-11-23 22:07:11,809 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,301 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:07:12,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:12,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:07:12,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112713284] [2019-11-23 22:07:12,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:07:12,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:07:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:12,332 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2019-11-23 22:07:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:12,406 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-23 22:07:12,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:07:12,406 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2019-11-23 22:07:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:12,407 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:07:12,407 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:07:12,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:07:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-11-23 22:07:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:07:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:07:12,412 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2019-11-23 22:07:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:12,413 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:07:12,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:07:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:07:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:07:12,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:12,414 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:12,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,623 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2019-11-23 22:07:12,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:12,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757829819] [2019-11-23 22:07:12,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757829819] [2019-11-23 22:07:12,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825817707] [2019-11-23 22:07:12,877 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:07:12,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536158382] [2019-11-23 22:07:12,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:07:12,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:07:12,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:12,951 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2019-11-23 22:07:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,028 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-23 22:07:13,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:07:13,029 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-11-23 22:07:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,029 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:07:13,029 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:07:13,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:07:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-23 22:07:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:07:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:07:13,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2019-11-23 22:07:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,035 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:07:13,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:07:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:07:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:07:13,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,035 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,243 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2019-11-23 22:07:13,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983575812] [2019-11-23 22:07:13,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:13,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983575812] [2019-11-23 22:07:13,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454784659] [2019-11-23 22:07:13,505 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:13,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:13,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:13,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:07:13,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729172846] [2019-11-23 22:07:13,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:07:13,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:07:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:13,572 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2019-11-23 22:07:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,663 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-23 22:07:13,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:07:13,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2019-11-23 22:07:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,664 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:07:13,664 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:07:13,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:07:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 22:07:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:07:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:07:13,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2019-11-23 22:07:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,668 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:07:13,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:07:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:07:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:07:13,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,669 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,869 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2019-11-23 22:07:13,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508519230] [2019-11-23 22:07:13,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:14,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508519230] [2019-11-23 22:07:14,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586223056] [2019-11-23 22:07:14,149 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:07:15,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:07:15,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810167711] [2019-11-23 22:07:15,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:07:15,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:07:15,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:15,204 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2019-11-23 22:07:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,288 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-11-23 22:07:15,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:07:15,289 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2019-11-23 22:07:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,290 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:07:15,290 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:07:15,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:07:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 22:07:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:07:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:07:15,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2019-11-23 22:07:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,295 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:07:15,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:07:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:07:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:07:15,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,296 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:15,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,500 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:15,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2019-11-23 22:07:15,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:15,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887190597] [2019-11-23 22:07:15,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887190597] [2019-11-23 22:07:15,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322302120] [2019-11-23 22:07:15,790 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:15,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 22:07:15,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56847532] [2019-11-23 22:07:15,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:07:15,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:07:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:15,860 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2019-11-23 22:07:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,942 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-11-23 22:07:15,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:07:15,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2019-11-23 22:07:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,943 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:07:15,943 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:07:15,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:07:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:07:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:07:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:07:15,948 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2019-11-23 22:07:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,948 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:07:15,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:07:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:07:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:07:15,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,949 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:16,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,153 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2019-11-23 22:07:16,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:16,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131061047] [2019-11-23 22:07:16,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:16,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131061047] [2019-11-23 22:07:16,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871350026] [2019-11-23 22:07:16,472 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,849 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:07:16,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:16,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:07:16,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:16,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:16,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:07:16,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657528766] [2019-11-23 22:07:16,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:07:16,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:16,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:07:16,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:16,868 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2019-11-23 22:07:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:16,963 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:07:16,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:07:16,963 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2019-11-23 22:07:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:16,964 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:07:16,964 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:07:16,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:07:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 22:07:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:07:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:07:16,968 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2019-11-23 22:07:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:16,969 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:07:16,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:07:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:07:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:07:16,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:16,969 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:17,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,170 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:17,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2019-11-23 22:07:17,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:17,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631673557] [2019-11-23 22:07:17,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:17,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631673557] [2019-11-23 22:07:17,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9191946] [2019-11-23 22:07:17,570 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:19,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:07:19,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:19,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:07:19,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:19,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:19,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:07:19,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420399713] [2019-11-23 22:07:19,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:07:19,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:07:19,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:19,879 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2019-11-23 22:07:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:19,956 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-11-23 22:07:19,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:07:19,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2019-11-23 22:07:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:19,957 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:07:19,958 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:07:19,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:07:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 22:07:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:07:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:07:19,962 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2019-11-23 22:07:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:19,963 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:07:19,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:07:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:07:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:07:19,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:19,963 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:20,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:20,164 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2019-11-23 22:07:20,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:20,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594845255] [2019-11-23 22:07:20,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:20,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594845255] [2019-11-23 22:07:20,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984002730] [2019-11-23 22:07:20,570 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:20,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:07:20,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:20,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:20,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 22:07:20,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438601537] [2019-11-23 22:07:20,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:07:20,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:20,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:07:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:20,666 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2019-11-23 22:07:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:20,753 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:07:20,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:07:20,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2019-11-23 22:07:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:20,754 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:07:20,754 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:07:20,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:07:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 22:07:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:07:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:07:20,760 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2019-11-23 22:07:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:20,760 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:07:20,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:07:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:07:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:07:20,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:20,762 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:20,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:20,965 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2019-11-23 22:07:20,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:20,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704884047] [2019-11-23 22:07:20,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:21,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704884047] [2019-11-23 22:07:21,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858942627] [2019-11-23 22:07:21,375 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:21,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:21,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:21,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:07:21,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:21,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:21,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:07:21,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255994201] [2019-11-23 22:07:21,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:07:21,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:21,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:07:21,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:21,478 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2019-11-23 22:07:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:21,579 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-11-23 22:07:21,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:07:21,580 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2019-11-23 22:07:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:21,581 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:07:21,581 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:07:21,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:07:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-23 22:07:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:07:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:07:21,588 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2019-11-23 22:07:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:21,589 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:07:21,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:07:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:07:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:07:21,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:21,589 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:21,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:21,794 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2019-11-23 22:07:21,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:21,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59349812] [2019-11-23 22:07:21,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:22,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59349812] [2019-11-23 22:07:22,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693883636] [2019-11-23 22:07:22,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:27,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:07:27,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:27,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:07:27,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:27,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:27,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:07:27,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253062121] [2019-11-23 22:07:27,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:07:27,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:07:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:27,571 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2019-11-23 22:07:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:27,666 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-11-23 22:07:27,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:07:27,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2019-11-23 22:07:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:27,667 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:07:27,667 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:07:27,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:07:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-23 22:07:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:07:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-11-23 22:07:27,671 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2019-11-23 22:07:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:27,672 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-11-23 22:07:27,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:07:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-11-23 22:07:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:07:27,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:27,673 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:27,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:27,874 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2019-11-23 22:07:27,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:27,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120945084] [2019-11-23 22:07:27,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:28,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120945084] [2019-11-23 22:07:28,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354180861] [2019-11-23 22:07:28,277 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:28,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:28,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:28,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:07:28,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:28,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:28,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 22:07:28,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617901655] [2019-11-23 22:07:28,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:07:28,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:07:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:28,361 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2019-11-23 22:07:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:28,447 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-11-23 22:07:28,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:07:28,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2019-11-23 22:07:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:28,448 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:07:28,448 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 22:07:28,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 22:07:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-11-23 22:07:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:07:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-11-23 22:07:28,452 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2019-11-23 22:07:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:28,452 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-11-23 22:07:28,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:07:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-11-23 22:07:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:07:28,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:28,453 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:28,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:28,657 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2019-11-23 22:07:28,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:28,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402880602] [2019-11-23 22:07:28,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:29,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402880602] [2019-11-23 22:07:29,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828782839] [2019-11-23 22:07:29,108 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:30,613 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:07:30,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:30,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:07:30,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:30,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:30,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 22:07:30,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800581468] [2019-11-23 22:07:30,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:07:30,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:07:30,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:30,637 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2019-11-23 22:07:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:30,741 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-11-23 22:07:30,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:07:30,742 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2019-11-23 22:07:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:30,743 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:07:30,743 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 22:07:30,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 22:07:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 22:07:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 22:07:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-11-23 22:07:30,747 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2019-11-23 22:07:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:30,747 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-11-23 22:07:30,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:07:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-11-23 22:07:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 22:07:30,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:30,748 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:30,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:30,954 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:30,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2019-11-23 22:07:30,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:30,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270970393] [2019-11-23 22:07:30,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:31,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270970393] [2019-11-23 22:07:31,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712714380] [2019-11-23 22:07:31,374 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:47,060 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:07:47,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:47,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:07:47,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:47,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:47,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 22:07:47,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148055703] [2019-11-23 22:07:47,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:07:47,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:47,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:07:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:47,094 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2019-11-23 22:07:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:47,203 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-11-23 22:07:47,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:07:47,204 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2019-11-23 22:07:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:47,205 INFO L225 Difference]: With dead ends: 74 [2019-11-23 22:07:47,205 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 22:07:47,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 22:07:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-11-23 22:07:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 22:07:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-11-23 22:07:47,208 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2019-11-23 22:07:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:47,208 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-11-23 22:07:47,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:07:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-11-23 22:07:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 22:07:47,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:47,209 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:47,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:47,418 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2019-11-23 22:07:47,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:47,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523052624] [2019-11-23 22:07:47,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:47,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523052624] [2019-11-23 22:07:47,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806729218] [2019-11-23 22:07:47,840 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:47,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:07:47,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:47,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:47,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 22:07:47,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492764988] [2019-11-23 22:07:47,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:07:47,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:47,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:07:47,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:47,920 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2019-11-23 22:07:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:48,034 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-11-23 22:07:48,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:07:48,034 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2019-11-23 22:07:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:48,035 INFO L225 Difference]: With dead ends: 76 [2019-11-23 22:07:48,035 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:07:48,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:07:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-23 22:07:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:07:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-11-23 22:07:48,041 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2019-11-23 22:07:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:48,041 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-11-23 22:07:48,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:07:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-11-23 22:07:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:07:48,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:48,042 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:48,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:48,246 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2019-11-23 22:07:48,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:48,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407915485] [2019-11-23 22:07:48,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:48,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407915485] [2019-11-23 22:07:48,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468710170] [2019-11-23 22:07:48,749 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:48,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:48,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:48,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:07:48,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:48,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:48,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:07:48,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724820731] [2019-11-23 22:07:48,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:07:48,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:48,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:07:48,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:48,826 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2019-11-23 22:07:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:48,921 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-11-23 22:07:48,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:07:48,921 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2019-11-23 22:07:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:48,922 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:07:48,922 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:07:48,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:07:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-23 22:07:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 22:07:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-11-23 22:07:48,927 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2019-11-23 22:07:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:48,927 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-11-23 22:07:48,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:07:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-11-23 22:07:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 22:07:48,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:48,928 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:49,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:49,133 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2019-11-23 22:07:49,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:49,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987137935] [2019-11-23 22:07:49,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:49,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987137935] [2019-11-23 22:07:49,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387487813] [2019-11-23 22:07:49,851 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:08:08,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:08,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:08:08,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:08,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:08,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:08:08,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218390022] [2019-11-23 22:08:08,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:08:08,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:08:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:08:08,038 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2019-11-23 22:08:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:08,165 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-11-23 22:08:08,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:08:08,166 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2019-11-23 22:08:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:08,167 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:08:08,167 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 22:08:08,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:08:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 22:08:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-23 22:08:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:08:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-11-23 22:08:08,171 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2019-11-23 22:08:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:08,171 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-11-23 22:08:08,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:08:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-11-23 22:08:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:08:08,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:08,172 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:08,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,380 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2019-11-23 22:08:08,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:08,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024154699] [2019-11-23 22:08:08,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:08,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024154699] [2019-11-23 22:08:08,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809153336] [2019-11-23 22:08:08,896 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:08,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:08,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:08:08,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:08,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:08,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 22:08:08,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856265574] [2019-11-23 22:08:08,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:08:08,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:08,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:08:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:08:08,979 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2019-11-23 22:08:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:09,122 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-11-23 22:08:09,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:08:09,122 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2019-11-23 22:08:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:09,123 INFO L225 Difference]: With dead ends: 82 [2019-11-23 22:08:09,123 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:08:09,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:08:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:08:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-23 22:08:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:08:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-11-23 22:08:09,127 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2019-11-23 22:08:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:09,127 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-11-23 22:08:09,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:08:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-11-23 22:08:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:08:09,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:09,128 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:09,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:09,331 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2019-11-23 22:08:09,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:09,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329813379] [2019-11-23 22:08:09,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:09,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329813379] [2019-11-23 22:08:09,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613511621] [2019-11-23 22:08:09,939 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:11,016 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 22:08:11,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:11,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:08:11,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:11,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:11,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 22:08:11,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507705022] [2019-11-23 22:08:11,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:08:11,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:08:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:11,043 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2019-11-23 22:08:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:11,191 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-11-23 22:08:11,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:08:11,192 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2019-11-23 22:08:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:11,193 INFO L225 Difference]: With dead ends: 84 [2019-11-23 22:08:11,193 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:08:11,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:08:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-23 22:08:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 22:08:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-11-23 22:08:11,196 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2019-11-23 22:08:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:11,197 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-11-23 22:08:11,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:08:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-11-23 22:08:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 22:08:11,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:11,197 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:11,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:11,403 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2019-11-23 22:08:11,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:11,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748992477] [2019-11-23 22:08:11,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:12,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748992477] [2019-11-23 22:08:12,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965966774] [2019-11-23 22:08:12,032 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:47,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 22:08:47,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:47,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:08:47,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:47,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:47,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 22:08:47,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283347478] [2019-11-23 22:08:47,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:08:47,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:47,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:08:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:47,122 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2019-11-23 22:08:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:47,287 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-11-23 22:08:47,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:08:47,288 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2019-11-23 22:08:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:47,288 INFO L225 Difference]: With dead ends: 86 [2019-11-23 22:08:47,289 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:08:47,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:08:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-23 22:08:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 22:08:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-11-23 22:08:47,292 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2019-11-23 22:08:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:47,293 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-11-23 22:08:47,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:08:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-11-23 22:08:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 22:08:47,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:47,294 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:47,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:47,503 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2019-11-23 22:08:47,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:47,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414863085] [2019-11-23 22:08:47,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:48,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414863085] [2019-11-23 22:08:48,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119374944] [2019-11-23 22:08:48,495 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:48,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:08:48,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:48,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:48,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 22:08:48,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107764399] [2019-11-23 22:08:48,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:08:48,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:08:48,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:48,577 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2019-11-23 22:08:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:48,737 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-11-23 22:08:48,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:08:48,737 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2019-11-23 22:08:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:48,738 INFO L225 Difference]: With dead ends: 88 [2019-11-23 22:08:48,738 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:08:48,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:08:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-11-23 22:08:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:08:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-11-23 22:08:48,743 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2019-11-23 22:08:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:48,744 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-11-23 22:08:48,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:08:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-11-23 22:08:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:08:48,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:48,745 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:48,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:48,948 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:48,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2019-11-23 22:08:48,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:48,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962587888] [2019-11-23 22:08:48,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:49,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962587888] [2019-11-23 22:08:49,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499071402] [2019-11-23 22:08:49,789 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:49,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:49,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:49,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:08:49,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:49,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:49,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 22:08:49,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444972219] [2019-11-23 22:08:49,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:08:49,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:08:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:08:49,895 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states.