java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 22:29:59,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 22:29:59,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 22:29:59,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-01 22:29:59,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 22:29:59,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 22:29:59,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 22:29:59,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 22:29:59,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 22:29:59,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 22:29:59,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 22:29:59,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 22:29:59,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 22:29:59,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 22:29:59,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 22:29:59,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 22:29:59,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 22:29:59,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 22:29:59,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 22:29:59,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 22:29:59,560 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 [2019-10-01 22:29:59,574 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 22:29:59,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 22:29:59,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 22:29:59,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 22:29:59,575 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 22:29:59,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 22:29:59,576 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 22:29:59,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 22:29:59,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 22:29:59,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 22:29:59,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 22:29:59,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 22:29:59,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 22:29:59,577 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 22:29:59,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 22:29:59,577 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 22:29:59,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 22:29:59,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 22:29:59,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 22:29:59,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 22:29:59,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 22:29:59,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:29:59,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 22:29:59,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 22:29:59,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 22:29:59,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 22:29:59,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 22:29:59,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 22:29:59,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 22:29:59,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 22:29:59,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 22:29:59,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 22:29:59,623 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 22:29:59,624 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 22:29:59,625 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-10-01 22:29:59,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d4fd7e7/986e829595e044dbbd6f090d344f5e16/FLAGb5b1f39d7 [2019-10-01 22:30:00,115 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 22:30:00,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-10-01 22:30:00,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d4fd7e7/986e829595e044dbbd6f090d344f5e16/FLAGb5b1f39d7 [2019-10-01 22:30:00,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d4fd7e7/986e829595e044dbbd6f090d344f5e16 [2019-10-01 22:30:00,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 22:30:00,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 22:30:00,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 22:30:00,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 22:30:00,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 22:30:00,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e3a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00, skipping insertion in model container [2019-10-01 22:30:00,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,554 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 22:30:00,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 22:30:00,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:30:00,776 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 22:30:00,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:30:00,816 INFO L192 MainTranslator]: Completed translation [2019-10-01 22:30:00,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00 WrapperNode [2019-10-01 22:30:00,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 22:30:00,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 22:30:00,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 22:30:00,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 22:30:00,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... [2019-10-01 22:30:00,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 22:30:00,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 22:30:00,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 22:30:00,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 22:30:00,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:30:01,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 22:30:01,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 22:30:01,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 22:30:01,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 22:30:01,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 22:30:01,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 22:30:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-01 22:30:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 22:30:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 22:30:01,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 22:30:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 22:30:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 22:30:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 22:30:01,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 22:30:01,276 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 22:30:01,276 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-01 22:30:01,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:30:01 BoogieIcfgContainer [2019-10-01 22:30:01,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 22:30:01,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 22:30:01,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 22:30:01,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 22:30:01,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 10:30:00" (1/3) ... [2019-10-01 22:30:01,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45b97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:30:01, skipping insertion in model container [2019-10-01 22:30:01,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:30:00" (2/3) ... [2019-10-01 22:30:01,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45b97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:30:01, skipping insertion in model container [2019-10-01 22:30:01,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:30:01" (3/3) ... [2019-10-01 22:30:01,295 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2019-10-01 22:30:01,311 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 22:30:01,317 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 22:30:01,332 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 22:30:01,357 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 22:30:01,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 22:30:01,357 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 22:30:01,357 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 22:30:01,358 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 22:30:01,358 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 22:30:01,358 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 22:30:01,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 22:30:01,358 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 22:30:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-01 22:30:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-01 22:30:01,377 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:01,378 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:01,380 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2019-10-01 22:30:01,387 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:01,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:01,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:01,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:30:01,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:30:01,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 22:30:01,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 22:30:01,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 22:30:01,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:30:01,536 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-10-01 22:30:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:01,554 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-01 22:30:01,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 22:30:01,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-01 22:30:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:01,563 INFO L225 Difference]: With dead ends: 46 [2019-10-01 22:30:01,564 INFO L226 Difference]: Without dead ends: 22 [2019-10-01 22:30:01,567 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:30:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-01 22:30:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-01 22:30:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-01 22:30:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-01 22:30:01,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-10-01 22:30:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:01,602 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-01 22:30:01,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 22:30:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-01 22:30:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-01 22:30:01,603 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:01,603 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:01,603 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2019-10-01 22:30:01,604 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:01,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:01,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:01,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:30:01,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:30:01,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:30:01,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:30:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:30:01,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:30:01,669 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2019-10-01 22:30:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:01,691 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-10-01 22:30:01,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:30:01,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-01 22:30:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:01,693 INFO L225 Difference]: With dead ends: 38 [2019-10-01 22:30:01,693 INFO L226 Difference]: Without dead ends: 24 [2019-10-01 22:30:01,694 INFO L640 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 [2019-10-01 22:30:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-01 22:30:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-01 22:30:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-01 22:30:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-01 22:30:01,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-01 22:30:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:01,701 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-01 22:30:01,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:30:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-01 22:30:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 22:30:01,703 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:01,703 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:01,703 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:01,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1578997828, now seen corresponding path program 1 times [2019-10-01 22:30:01,704 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:01,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:01,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:01,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:30:01,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:30:01,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:30:01,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:30:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:30:01,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:30:01,783 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-10-01 22:30:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:01,815 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-10-01 22:30:01,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:30:01,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-01 22:30:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:01,819 INFO L225 Difference]: With dead ends: 36 [2019-10-01 22:30:01,819 INFO L226 Difference]: Without dead ends: 25 [2019-10-01 22:30:01,820 INFO L640 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 [2019-10-01 22:30:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-01 22:30:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-01 22:30:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-01 22:30:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-01 22:30:01,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-01 22:30:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:01,836 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-01 22:30:01,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:30:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-01 22:30:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-01 22:30:01,837 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:01,838 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:01,839 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2019-10-01 22:30:01,840 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:01,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:01,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:01,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:30:01,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:01,925 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:01,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:01,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:30:01,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream closed [2019-10-01 22:30:02,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:02,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-01 22:30:02,050 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 22:30:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 22:30:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:30:02,054 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-10-01 22:30:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:02,094 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-01 22:30:02,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 22:30:02,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-01 22:30:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:02,097 INFO L225 Difference]: With dead ends: 42 [2019-10-01 22:30:02,097 INFO L226 Difference]: Without dead ends: 27 [2019-10-01 22:30:02,098 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:30:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-01 22:30:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-01 22:30:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-01 22:30:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-01 22:30:02,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-10-01 22:30:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:02,106 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-01 22:30:02,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 22:30:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-01 22:30:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-01 22:30:02,107 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:02,107 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:02,107 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 64185792, now seen corresponding path program 2 times [2019-10-01 22:30:02,108 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:02,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:02,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:02,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:30:02,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:02,171 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:02,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:30:02,231 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:30:02,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:02,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:30:02,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:30:02,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:02,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-01 22:30:02,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 22:30:02,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 22:30:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:30:02,260 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2019-10-01 22:30:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:02,288 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-10-01 22:30:02,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 22:30:02,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-01 22:30:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:02,290 INFO L225 Difference]: With dead ends: 44 [2019-10-01 22:30:02,291 INFO L226 Difference]: Without dead ends: 29 [2019-10-01 22:30:02,291 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:30:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-01 22:30:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-01 22:30:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-01 22:30:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-01 22:30:02,297 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2019-10-01 22:30:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:02,298 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-01 22:30:02,298 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 22:30:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-01 22:30:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 22:30:02,299 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:02,299 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:02,300 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1131404638, now seen corresponding path program 3 times [2019-10-01 22:30:02,301 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:02,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:02,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:02,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:30:02,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:02,400 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:02,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:30:02,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-01 22:30:02,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:02,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:30:02,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-01 22:30:02,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:02,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-01 22:30:02,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 22:30:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 22:30:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:30:02,492 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-10-01 22:30:02,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:02,590 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-10-01 22:30:02,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 22:30:02,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-10-01 22:30:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:02,593 INFO L225 Difference]: With dead ends: 49 [2019-10-01 22:30:02,593 INFO L226 Difference]: Without dead ends: 34 [2019-10-01 22:30:02,594 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:30:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-01 22:30:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-01 22:30:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-01 22:30:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-01 22:30:02,603 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2019-10-01 22:30:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:02,605 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-01 22:30:02,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 22:30:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-01 22:30:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-01 22:30:02,608 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:02,608 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:02,608 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash -806191654, now seen corresponding path program 4 times [2019-10-01 22:30:02,609 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:02,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:02,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:02,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 22:30:02,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:02,700 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:02,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:30:02,749 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:30:02,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:02,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:30:02,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 22:30:02,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:02,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-01 22:30:02,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 22:30:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 22:30:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:30:02,783 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2019-10-01 22:30:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:02,828 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-10-01 22:30:02,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 22:30:02,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-10-01 22:30:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:02,829 INFO L225 Difference]: With dead ends: 52 [2019-10-01 22:30:02,829 INFO L226 Difference]: Without dead ends: 35 [2019-10-01 22:30:02,830 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:30:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-01 22:30:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-01 22:30:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-01 22:30:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-01 22:30:02,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2019-10-01 22:30:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:02,840 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-01 22:30:02,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 22:30:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-01 22:30:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-01 22:30:02,842 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:02,842 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:02,843 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1775089928, now seen corresponding path program 5 times [2019-10-01 22:30:02,843 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:02,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:02,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:02,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 22:30:02,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:02,936 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:02,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:30:03,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-01 22:30:03,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:03,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:30:03,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-01 22:30:03,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:03,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-01 22:30:03,046 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 22:30:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 22:30:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:30:03,047 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2019-10-01 22:30:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:03,117 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-10-01 22:30:03,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 22:30:03,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-10-01 22:30:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:03,120 INFO L225 Difference]: With dead ends: 57 [2019-10-01 22:30:03,120 INFO L226 Difference]: Without dead ends: 40 [2019-10-01 22:30:03,120 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:30:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-01 22:30:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-10-01 22:30:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-01 22:30:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-10-01 22:30:03,126 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2019-10-01 22:30:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:03,126 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-10-01 22:30:03,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 22:30:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-10-01 22:30:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-01 22:30:03,128 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:03,128 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:03,128 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1969191540, now seen corresponding path program 6 times [2019-10-01 22:30:03,129 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:03,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:03,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:03,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-01 22:30:03,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:03,216 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:03,239 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:30:03,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-01 22:30:03,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:03,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 22:30:03,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-01 22:30:03,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:03,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-01 22:30:03,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 22:30:03,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 22:30:03,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-10-01 22:30:03,337 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 13 states. [2019-10-01 22:30:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:03,419 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2019-10-01 22:30:03,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 22:30:03,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-01 22:30:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:03,420 INFO L225 Difference]: With dead ends: 63 [2019-10-01 22:30:03,421 INFO L226 Difference]: Without dead ends: 44 [2019-10-01 22:30:03,421 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-10-01 22:30:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-01 22:30:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-10-01 22:30:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-01 22:30:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-10-01 22:30:03,427 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2019-10-01 22:30:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:03,427 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-10-01 22:30:03,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 22:30:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-10-01 22:30:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-01 22:30:03,428 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:03,428 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:03,429 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash -811630608, now seen corresponding path program 7 times [2019-10-01 22:30:03,429 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:03,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:03,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:03,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-01 22:30:03,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:03,536 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:03,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:03,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 22:30:03,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-01 22:30:03,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:03,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-01 22:30:03,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 22:30:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 22:30:03,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:30:03,633 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2019-10-01 22:30:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:03,680 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2019-10-01 22:30:03,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 22:30:03,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-10-01 22:30:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:03,683 INFO L225 Difference]: With dead ends: 66 [2019-10-01 22:30:03,683 INFO L226 Difference]: Without dead ends: 45 [2019-10-01 22:30:03,683 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:30:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-01 22:30:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-01 22:30:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-01 22:30:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-01 22:30:03,689 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2019-10-01 22:30:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:03,690 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-01 22:30:03,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 22:30:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-01 22:30:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-01 22:30:03,691 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:03,691 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:03,691 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:03,692 INFO L82 PathProgramCache]: Analyzing trace with hash 373619598, now seen corresponding path program 8 times [2019-10-01 22:30:03,692 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:03,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:03,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:03,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-01 22:30:03,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:03,825 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:30:03,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:03,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:30:03,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:03,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 22:30:03,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-01 22:30:03,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:03,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-01 22:30:03,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 22:30:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 22:30:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:30:03,915 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2019-10-01 22:30:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:03,959 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2019-10-01 22:30:03,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 22:30:03,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-10-01 22:30:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:03,961 INFO L225 Difference]: With dead ends: 68 [2019-10-01 22:30:03,961 INFO L226 Difference]: Without dead ends: 47 [2019-10-01 22:30:03,962 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:30:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-01 22:30:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-01 22:30:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-01 22:30:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-10-01 22:30:03,967 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2019-10-01 22:30:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:03,967 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-10-01 22:30:03,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 22:30:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-10-01 22:30:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-01 22:30:03,968 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:03,968 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:03,969 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1232734124, now seen corresponding path program 9 times [2019-10-01 22:30:03,969 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:03,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:03,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:03,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-01 22:30:04,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:04,112 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:04,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:30:04,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-01 22:30:04,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:04,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:30:04,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 22:30:04,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:04,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-10-01 22:30:04,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 22:30:04,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 22:30:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-10-01 22:30:04,240 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 17 states. [2019-10-01 22:30:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:04,345 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-10-01 22:30:04,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-01 22:30:04,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2019-10-01 22:30:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:04,347 INFO L225 Difference]: With dead ends: 73 [2019-10-01 22:30:04,348 INFO L226 Difference]: Without dead ends: 52 [2019-10-01 22:30:04,350 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-10-01 22:30:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-01 22:30:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-10-01 22:30:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-01 22:30:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-01 22:30:04,363 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2019-10-01 22:30:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:04,363 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-01 22:30:04,363 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 22:30:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-01 22:30:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-01 22:30:04,367 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:04,367 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:04,367 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash 274047272, now seen corresponding path program 10 times [2019-10-01 22:30:04,368 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:04,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:04,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:04,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:04,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:04,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:04,451 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:04,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:30:04,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:30:04,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:04,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 22:30:04,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:30:04,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:04,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 19 [2019-10-01 22:30:04,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-01 22:30:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-01 22:30:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:30:04,666 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2019-10-01 22:30:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:04,758 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2019-10-01 22:30:04,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 22:30:04,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2019-10-01 22:30:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:04,759 INFO L225 Difference]: With dead ends: 79 [2019-10-01 22:30:04,760 INFO L226 Difference]: Without dead ends: 56 [2019-10-01 22:30:04,760 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:30:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-01 22:30:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-10-01 22:30:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-01 22:30:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-10-01 22:30:04,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2019-10-01 22:30:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:04,766 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-10-01 22:30:04,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-01 22:30:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-10-01 22:30:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-01 22:30:04,767 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:04,767 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:04,767 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:04,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash 380177572, now seen corresponding path program 11 times [2019-10-01 22:30:04,768 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:04,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:04,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:04,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:04,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:30:04,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:04,833 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:30:04,858 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:05,414 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-01 22:30:05,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:05,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 22:30:05,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:30:05,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:05,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-01 22:30:05,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 22:30:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 22:30:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:30:05,451 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 10 states. [2019-10-01 22:30:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:05,481 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2019-10-01 22:30:05,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 22:30:05,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2019-10-01 22:30:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:05,482 INFO L225 Difference]: With dead ends: 68 [2019-10-01 22:30:05,482 INFO L226 Difference]: Without dead ends: 57 [2019-10-01 22:30:05,483 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:30:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-01 22:30:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-10-01 22:30:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-01 22:30:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-10-01 22:30:05,488 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2019-10-01 22:30:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:05,489 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-10-01 22:30:05,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 22:30:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-10-01 22:30:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-01 22:30:05,490 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:05,490 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:05,490 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:05,491 INFO L82 PathProgramCache]: Analyzing trace with hash 308378370, now seen corresponding path program 12 times [2019-10-01 22:30:05,491 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:05,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:05,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:05,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:05,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:30:05,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:05,572 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:05,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:30:05,971 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-10-01 22:30:05,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:05,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 22:30:05,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:30:05,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:05,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-01 22:30:05,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 22:30:05,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 22:30:05,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:30:05,998 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 11 states. [2019-10-01 22:30:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:06,034 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2019-10-01 22:30:06,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 22:30:06,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-01 22:30:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:06,035 INFO L225 Difference]: With dead ends: 70 [2019-10-01 22:30:06,035 INFO L226 Difference]: Without dead ends: 59 [2019-10-01 22:30:06,036 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:30:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-01 22:30:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-10-01 22:30:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-01 22:30:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-10-01 22:30:06,045 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2019-10-01 22:30:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:06,045 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-10-01 22:30:06,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 22:30:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-10-01 22:30:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-01 22:30:06,047 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:06,047 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:06,048 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:06,048 INFO L82 PathProgramCache]: Analyzing trace with hash 28821984, now seen corresponding path program 13 times [2019-10-01 22:30:06,048 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:06,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:06,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:06,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:30:06,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:06,148 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:06,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:06,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:30:06,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-01 22:30:06,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:06,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2019-10-01 22:30:06,376 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 22:30:06,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 22:30:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:30:06,377 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2019-10-01 22:30:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:06,475 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2019-10-01 22:30:06,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 22:30:06,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2019-10-01 22:30:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:06,477 INFO L225 Difference]: With dead ends: 93 [2019-10-01 22:30:06,477 INFO L226 Difference]: Without dead ends: 64 [2019-10-01 22:30:06,479 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:30:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-01 22:30:06,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-10-01 22:30:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-01 22:30:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-10-01 22:30:06,485 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2019-10-01 22:30:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:06,486 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-10-01 22:30:06,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 22:30:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-10-01 22:30:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-01 22:30:06,487 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:06,487 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:06,487 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash 138078556, now seen corresponding path program 14 times [2019-10-01 22:30:06,488 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:06,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:06,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:06,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 22:30:06,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:06,612 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:30:06,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:06,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:30:06,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:06,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:30:06,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 22:30:06,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:06,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-10-01 22:30:06,711 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:30:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:30:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:30:06,712 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 16 states. [2019-10-01 22:30:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:06,755 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2019-10-01 22:30:06,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-01 22:30:06,756 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-10-01 22:30:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:06,756 INFO L225 Difference]: With dead ends: 96 [2019-10-01 22:30:06,756 INFO L226 Difference]: Without dead ends: 65 [2019-10-01 22:30:06,757 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:30:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-01 22:30:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-01 22:30:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-01 22:30:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-10-01 22:30:06,762 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2019-10-01 22:30:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:06,762 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-10-01 22:30:06,763 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:30:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-10-01 22:30:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-01 22:30:06,763 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:06,763 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:06,764 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -826512902, now seen corresponding path program 15 times [2019-10-01 22:30:06,764 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:06,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:06,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:06,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 22:30:06,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:06,903 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:06,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:30:07,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-01 22:30:07,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:07,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 22:30:07,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-01 22:30:07,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:07,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-10-01 22:30:07,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 22:30:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 22:30:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:30:07,695 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 26 states. [2019-10-01 22:30:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:07,825 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-10-01 22:30:07,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 22:30:07,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2019-10-01 22:30:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:07,827 INFO L225 Difference]: With dead ends: 101 [2019-10-01 22:30:07,827 INFO L226 Difference]: Without dead ends: 70 [2019-10-01 22:30:07,829 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:30:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-01 22:30:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-10-01 22:30:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-01 22:30:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-10-01 22:30:07,842 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2019-10-01 22:30:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:07,842 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-10-01 22:30:07,843 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 22:30:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-10-01 22:30:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-01 22:30:07,843 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:07,844 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:07,844 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:07,846 INFO L82 PathProgramCache]: Analyzing trace with hash -981017482, now seen corresponding path program 16 times [2019-10-01 22:30:07,846 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:07,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:07,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:07,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:07,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:08,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:08,061 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:08,085 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:30:08,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:30:08,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:08,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 22:30:08,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:08,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:08,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-01 22:30:08,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 22:30:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 22:30:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:30:08,162 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 18 states. [2019-10-01 22:30:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:08,219 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2019-10-01 22:30:08,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-01 22:30:08,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2019-10-01 22:30:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:08,220 INFO L225 Difference]: With dead ends: 104 [2019-10-01 22:30:08,221 INFO L226 Difference]: Without dead ends: 71 [2019-10-01 22:30:08,221 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:30:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-01 22:30:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-10-01 22:30:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-01 22:30:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-10-01 22:30:08,225 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2019-10-01 22:30:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:08,225 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-10-01 22:30:08,226 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 22:30:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-10-01 22:30:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-01 22:30:08,226 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:08,227 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:08,227 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1426002284, now seen corresponding path program 17 times [2019-10-01 22:30:08,227 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:08,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:08,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:08,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:08,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:08,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:08,414 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:08,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:30:10,526 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-01 22:30:10,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:10,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 22:30:10,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:10,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:10,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-01 22:30:10,552 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-01 22:30:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-01 22:30:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:30:10,553 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2019-10-01 22:30:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:10,654 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2019-10-01 22:30:10,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-01 22:30:10,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2019-10-01 22:30:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:10,656 INFO L225 Difference]: With dead ends: 106 [2019-10-01 22:30:10,656 INFO L226 Difference]: Without dead ends: 73 [2019-10-01 22:30:10,657 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:30:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-01 22:30:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-01 22:30:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-01 22:30:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-10-01 22:30:10,660 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2019-10-01 22:30:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:10,661 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-10-01 22:30:10,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-01 22:30:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-10-01 22:30:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-01 22:30:10,661 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:10,662 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:10,662 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:10,662 INFO L82 PathProgramCache]: Analyzing trace with hash 440332594, now seen corresponding path program 18 times [2019-10-01 22:30:10,662 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:10,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:10,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:10,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:10,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:10,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:10,859 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:30:10,899 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:13,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-01 22:30:13,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:13,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:30:13,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:30:14,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:14,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-01 22:30:14,024 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 22:30:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 22:30:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:30:14,025 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 20 states. [2019-10-01 22:30:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:14,098 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2019-10-01 22:30:14,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 22:30:14,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2019-10-01 22:30:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:14,100 INFO L225 Difference]: With dead ends: 108 [2019-10-01 22:30:14,100 INFO L226 Difference]: Without dead ends: 75 [2019-10-01 22:30:14,101 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:30:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-01 22:30:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-01 22:30:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-01 22:30:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-10-01 22:30:14,104 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2019-10-01 22:30:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:14,105 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-10-01 22:30:14,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 22:30:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-10-01 22:30:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-01 22:30:14,106 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:14,106 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:14,106 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1308179376, now seen corresponding path program 19 times [2019-10-01 22:30:14,107 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:14,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:14,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:14,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:14,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:14,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:14,292 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:14,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:14,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 22:30:14,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:14,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:14,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-01 22:30:14,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 22:30:14,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 22:30:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 22:30:14,368 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 21 states. [2019-10-01 22:30:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:14,438 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2019-10-01 22:30:14,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 22:30:14,440 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2019-10-01 22:30:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:14,441 INFO L225 Difference]: With dead ends: 110 [2019-10-01 22:30:14,441 INFO L226 Difference]: Without dead ends: 77 [2019-10-01 22:30:14,442 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 22:30:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-01 22:30:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-10-01 22:30:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-01 22:30:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-10-01 22:30:14,446 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2019-10-01 22:30:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:14,446 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-10-01 22:30:14,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 22:30:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-10-01 22:30:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-01 22:30:14,447 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:14,447 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:14,447 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:14,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1998997486, now seen corresponding path program 20 times [2019-10-01 22:30:14,448 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:14,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:14,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:14,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:14,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:14,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:14,660 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 22:30:14,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:14,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:30:14,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:14,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-01 22:30:14,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:14,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:14,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-01 22:30:14,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 22:30:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 22:30:14,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 22:30:14,794 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 22 states. [2019-10-01 22:30:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:14,864 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2019-10-01 22:30:14,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-01 22:30:14,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2019-10-01 22:30:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:14,865 INFO L225 Difference]: With dead ends: 112 [2019-10-01 22:30:14,865 INFO L226 Difference]: Without dead ends: 79 [2019-10-01 22:30:14,866 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 22:30:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-01 22:30:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-10-01 22:30:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-01 22:30:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-10-01 22:30:14,870 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2019-10-01 22:30:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:14,870 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-10-01 22:30:14,870 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 22:30:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-10-01 22:30:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-01 22:30:14,871 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:14,871 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:14,871 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1920162828, now seen corresponding path program 21 times [2019-10-01 22:30:14,872 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:14,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:14,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:14,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:14,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:30:15,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:15,128 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:15,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:30:15,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-01 22:30:15,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:15,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 22:30:15,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-01 22:30:15,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:15,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2019-10-01 22:30:15,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 22:30:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 22:30:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 22:30:15,857 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 33 states. [2019-10-01 22:30:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:16,002 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2019-10-01 22:30:16,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-01 22:30:16,002 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2019-10-01 22:30:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:16,003 INFO L225 Difference]: With dead ends: 117 [2019-10-01 22:30:16,003 INFO L226 Difference]: Without dead ends: 84 [2019-10-01 22:30:16,004 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 22:30:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-01 22:30:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-10-01 22:30:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-01 22:30:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2019-10-01 22:30:16,007 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 73 [2019-10-01 22:30:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:16,008 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2019-10-01 22:30:16,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 22:30:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2019-10-01 22:30:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-01 22:30:16,008 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:16,009 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:16,009 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1293903240, now seen corresponding path program 22 times [2019-10-01 22:30:16,009 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:16,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:16,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:16,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:30:16,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:16,281 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:16,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:30:16,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:30:16,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:16,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:30:16,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-01 22:30:16,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:16,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2019-10-01 22:30:16,540 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-01 22:30:16,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-01 22:30:16,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=847, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:30:16,541 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 35 states. [2019-10-01 22:30:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:16,708 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2019-10-01 22:30:16,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-01 22:30:16,708 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2019-10-01 22:30:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:16,709 INFO L225 Difference]: With dead ends: 123 [2019-10-01 22:30:16,709 INFO L226 Difference]: Without dead ends: 88 [2019-10-01 22:30:16,710 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=847, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:30:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-01 22:30:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2019-10-01 22:30:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-01 22:30:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-10-01 22:30:16,713 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2019-10-01 22:30:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:16,713 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-10-01 22:30:16,713 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-01 22:30:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-10-01 22:30:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 22:30:16,714 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:16,714 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:16,714 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:16,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1683799804, now seen corresponding path program 23 times [2019-10-01 22:30:16,715 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:16,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:16,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-01 22:30:16,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:16,970 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:16,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:30:33,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-01 22:30:33,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:33,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:30:33,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-01 22:30:33,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:33,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2019-10-01 22:30:33,494 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-01 22:30:33,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-01 22:30:33,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=952, Unknown=0, NotChecked=0, Total=1332 [2019-10-01 22:30:33,495 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 37 states. [2019-10-01 22:30:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:33,650 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2019-10-01 22:30:33,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-01 22:30:33,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2019-10-01 22:30:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:33,659 INFO L225 Difference]: With dead ends: 129 [2019-10-01 22:30:33,659 INFO L226 Difference]: Without dead ends: 92 [2019-10-01 22:30:33,660 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=952, Unknown=0, NotChecked=0, Total=1332 [2019-10-01 22:30:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-01 22:30:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2019-10-01 22:30:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-01 22:30:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2019-10-01 22:30:33,663 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 81 [2019-10-01 22:30:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:33,664 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2019-10-01 22:30:33,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-01 22:30:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2019-10-01 22:30:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-01 22:30:33,664 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:33,665 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:33,665 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -515248512, now seen corresponding path program 24 times [2019-10-01 22:30:33,665 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:33,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:33,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-01 22:30:33,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:33,996 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:34,056 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:30:42,985 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-10-01 22:30:42,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:42,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 22:30:42,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-01 22:30:43,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:43,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 39 [2019-10-01 22:30:43,248 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-01 22:30:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-01 22:30:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2019-10-01 22:30:43,250 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 39 states. [2019-10-01 22:30:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:43,396 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2019-10-01 22:30:43,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-01 22:30:43,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2019-10-01 22:30:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:43,400 INFO L225 Difference]: With dead ends: 135 [2019-10-01 22:30:43,400 INFO L226 Difference]: Without dead ends: 96 [2019-10-01 22:30:43,401 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2019-10-01 22:30:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-01 22:30:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-10-01 22:30:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-01 22:30:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-10-01 22:30:43,405 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 85 [2019-10-01 22:30:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:43,405 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-10-01 22:30:43,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-01 22:30:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-10-01 22:30:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-01 22:30:43,406 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:43,406 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:43,406 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 853437948, now seen corresponding path program 25 times [2019-10-01 22:30:43,407 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:43,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:43,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:43,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:43,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-01 22:30:43,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:43,734 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:43,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:43,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 22:30:43,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-01 22:30:43,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:43,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-10-01 22:30:43,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-01 22:30:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-01 22:30:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 22:30:43,839 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 27 states. [2019-10-01 22:30:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:43,918 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2019-10-01 22:30:43,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 22:30:43,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 89 [2019-10-01 22:30:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:43,920 INFO L225 Difference]: With dead ends: 138 [2019-10-01 22:30:43,920 INFO L226 Difference]: Without dead ends: 97 [2019-10-01 22:30:43,921 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 22:30:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-01 22:30:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-10-01 22:30:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-01 22:30:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-10-01 22:30:43,925 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2019-10-01 22:30:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:43,925 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-10-01 22:30:43,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-01 22:30:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-10-01 22:30:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-01 22:30:43,926 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:43,926 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:43,926 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1048966810, now seen corresponding path program 26 times [2019-10-01 22:30:43,927 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:43,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:43,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-01 22:30:44,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:44,274 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:44,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:30:44,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:30:44,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:44,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 22:30:44,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-01 22:30:44,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:44,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-10-01 22:30:44,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 22:30:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 22:30:44,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:30:44,376 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 28 states. [2019-10-01 22:30:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:44,456 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2019-10-01 22:30:44,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 22:30:44,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2019-10-01 22:30:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:44,457 INFO L225 Difference]: With dead ends: 140 [2019-10-01 22:30:44,457 INFO L226 Difference]: Without dead ends: 99 [2019-10-01 22:30:44,458 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:30:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-01 22:30:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-10-01 22:30:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-01 22:30:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2019-10-01 22:30:44,461 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2019-10-01 22:30:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:44,461 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2019-10-01 22:30:44,461 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 22:30:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2019-10-01 22:30:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-01 22:30:44,462 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:44,462 INFO L411 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:44,462 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash -26357832, now seen corresponding path program 27 times [2019-10-01 22:30:44,463 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:44,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:44,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:44,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-01 22:30:44,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:44,811 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:44,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:30:48,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-01 22:30:48,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:48,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-01 22:30:48,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 49 proven. 196 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-01 22:30:48,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:48,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 45 [2019-10-01 22:30:48,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-01 22:30:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-01 22:30:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2019-10-01 22:30:48,530 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 45 states. [2019-10-01 22:30:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:49,051 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2019-10-01 22:30:49,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-01 22:30:49,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 93 [2019-10-01 22:30:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:49,052 INFO L225 Difference]: With dead ends: 146 [2019-10-01 22:30:49,052 INFO L226 Difference]: Without dead ends: 105 [2019-10-01 22:30:49,054 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=840, Invalid=2700, Unknown=0, NotChecked=0, Total=3540 [2019-10-01 22:30:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-01 22:30:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-10-01 22:30:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-01 22:30:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-10-01 22:30:49,059 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 93 [2019-10-01 22:30:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:49,060 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-10-01 22:30:49,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-01 22:30:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-10-01 22:30:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-01 22:30:49,061 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:49,061 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:49,061 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash -707269166, now seen corresponding path program 28 times [2019-10-01 22:30:49,061 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:49,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:49,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:49,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:49,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:30:49,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:49,474 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:49,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:30:49,564 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:30:49,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:49,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 22:30:49,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:30:49,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:49,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-10-01 22:30:49,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-01 22:30:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-01 22:30:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 22:30:49,605 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 31 states. [2019-10-01 22:30:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:49,719 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2019-10-01 22:30:49,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-01 22:30:49,720 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 99 [2019-10-01 22:30:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:49,721 INFO L225 Difference]: With dead ends: 150 [2019-10-01 22:30:49,721 INFO L226 Difference]: Without dead ends: 107 [2019-10-01 22:30:49,722 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 22:30:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-01 22:30:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-10-01 22:30:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-01 22:30:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2019-10-01 22:30:49,726 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2019-10-01 22:30:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:49,726 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2019-10-01 22:30:49,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-01 22:30:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2019-10-01 22:30:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-01 22:30:49,727 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:49,727 INFO L411 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:49,728 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:49,728 INFO L82 PathProgramCache]: Analyzing trace with hash 551274736, now seen corresponding path program 29 times [2019-10-01 22:30:49,728 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:49,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:49,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:49,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:49,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:30:50,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:50,113 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:50,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:31:55,592 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-10-01 22:31:55,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:31:55,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 22:31:55,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:31:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:31:55,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:31:55,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-10-01 22:31:55,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 22:31:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 22:31:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 22:31:55,661 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 32 states. [2019-10-01 22:31:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:31:55,778 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2019-10-01 22:31:55,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 22:31:55,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 101 [2019-10-01 22:31:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:31:55,786 INFO L225 Difference]: With dead ends: 152 [2019-10-01 22:31:55,786 INFO L226 Difference]: Without dead ends: 109 [2019-10-01 22:31:55,787 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 22:31:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-01 22:31:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2019-10-01 22:31:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-01 22:31:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-01 22:31:55,791 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2019-10-01 22:31:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:31:55,791 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-01 22:31:55,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 22:31:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-01 22:31:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-01 22:31:55,792 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:31:55,792 INFO L411 BasicCegarLoop]: trace histogram [29, 29, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:31:55,792 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:31:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:31:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1168812914, now seen corresponding path program 30 times [2019-10-01 22:31:55,793 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:31:55,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:31:55,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:31:55,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:31:55,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:31:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:31:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:31:56,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:31:56,377 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:31:56,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:32:50,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2019-10-01 22:32:50,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:32:50,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-01 22:32:50,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:32:50,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:50,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-10-01 22:32:50,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 22:32:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 22:32:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 22:32:50,280 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 33 states. [2019-10-01 22:32:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:50,361 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2019-10-01 22:32:50,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-01 22:32:50,362 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 103 [2019-10-01 22:32:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:50,363 INFO L225 Difference]: With dead ends: 154 [2019-10-01 22:32:50,363 INFO L226 Difference]: Without dead ends: 111 [2019-10-01 22:32:50,364 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 22:32:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-01 22:32:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-10-01 22:32:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-01 22:32:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-10-01 22:32:50,369 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2019-10-01 22:32:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:50,369 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-10-01 22:32:50,369 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 22:32:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-10-01 22:32:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-01 22:32:50,369 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:50,370 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:50,370 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash -610635604, now seen corresponding path program 31 times [2019-10-01 22:32:50,370 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:50,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:50,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:50,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:32:50,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:32:51,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:51,083 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:51,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:32:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:51,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-01 22:32:51,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:32:51,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:51,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-10-01 22:32:51,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-01 22:32:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-01 22:32:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-10-01 22:32:51,248 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 34 states. [2019-10-01 22:32:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:51,357 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2019-10-01 22:32:51,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-01 22:32:51,357 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 105 [2019-10-01 22:32:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:51,358 INFO L225 Difference]: With dead ends: 156 [2019-10-01 22:32:51,358 INFO L226 Difference]: Without dead ends: 113 [2019-10-01 22:32:51,359 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-10-01 22:32:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-01 22:32:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-01 22:32:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-01 22:32:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2019-10-01 22:32:51,363 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2019-10-01 22:32:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:51,363 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2019-10-01 22:32:51,363 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-01 22:32:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2019-10-01 22:32:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-01 22:32:51,364 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:51,364 INFO L411 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:51,364 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1073152694, now seen corresponding path program 32 times [2019-10-01 22:32:51,365 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:51,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:51,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:32:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:32:51,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:51,862 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:51,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:32:51,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:32:51,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:32:51,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-01 22:32:51,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:32:51,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:51,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-10-01 22:32:51,982 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-01 22:32:51,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-01 22:32:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:32:51,983 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 35 states. [2019-10-01 22:32:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:52,082 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2019-10-01 22:32:52,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-01 22:32:52,082 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 107 [2019-10-01 22:32:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:52,083 INFO L225 Difference]: With dead ends: 158 [2019-10-01 22:32:52,083 INFO L226 Difference]: Without dead ends: 115 [2019-10-01 22:32:52,084 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:32:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-01 22:32:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-01 22:32:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-01 22:32:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2019-10-01 22:32:52,088 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2019-10-01 22:32:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:52,089 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2019-10-01 22:32:52,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-01 22:32:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2019-10-01 22:32:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-01 22:32:52,090 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:52,090 INFO L411 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:52,090 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1124522600, now seen corresponding path program 33 times [2019-10-01 22:32:52,091 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:52,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:52,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:52,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:32:52,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:32:52,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:52,611 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:52,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:32:56,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-01 22:32:56,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:32:56,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 22:32:56,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 63 proven. 225 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-10-01 22:32:57,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:57,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2019-10-01 22:32:57,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-01 22:32:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-01 22:32:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1938, Unknown=0, NotChecked=0, Total=2756 [2019-10-01 22:32:57,007 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 53 states. [2019-10-01 22:32:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:57,668 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2019-10-01 22:32:57,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-01 22:32:57,668 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 109 [2019-10-01 22:32:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:57,669 INFO L225 Difference]: With dead ends: 164 [2019-10-01 22:32:57,669 INFO L226 Difference]: Without dead ends: 121 [2019-10-01 22:32:57,670 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1122, Invalid=3570, Unknown=0, NotChecked=0, Total=4692 [2019-10-01 22:32:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-01 22:32:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-10-01 22:32:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-01 22:32:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-10-01 22:32:57,675 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 109 [2019-10-01 22:32:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:57,675 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-10-01 22:32:57,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-01 22:32:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-10-01 22:32:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-01 22:32:57,676 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:57,676 INFO L411 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:57,676 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash 206574722, now seen corresponding path program 34 times [2019-10-01 22:32:57,677 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:57,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:57,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:57,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:32:57,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-01 22:32:58,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:58,420 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:58,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:32:58,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:32:58,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:32:58,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-01 22:32:58,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-01 22:32:58,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:58,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-10-01 22:32:58,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-01 22:32:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-01 22:32:58,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-10-01 22:32:58,575 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 38 states. [2019-10-01 22:32:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:58,672 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2019-10-01 22:32:58,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-01 22:32:58,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2019-10-01 22:32:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:58,674 INFO L225 Difference]: With dead ends: 168 [2019-10-01 22:32:58,674 INFO L226 Difference]: Without dead ends: 123 [2019-10-01 22:32:58,675 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-10-01 22:32:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-01 22:32:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-10-01 22:32:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-10-01 22:32:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2019-10-01 22:32:58,679 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2019-10-01 22:32:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:58,681 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2019-10-01 22:32:58,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-01 22:32:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2019-10-01 22:32:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-01 22:32:58,682 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:58,682 INFO L411 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:58,682 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1239026784, now seen corresponding path program 35 times [2019-10-01 22:32:58,683 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:58,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:58,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:58,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:32:58,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-01 22:32:59,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:59,291 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:59,336 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:34:38,698 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-10-01 22:34:38,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:34:38,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-01 22:34:38,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:34:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-01 22:34:38,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:34:38,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-10-01 22:34:38,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-01 22:34:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-01 22:34:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-10-01 22:34:38,779 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 39 states. [2019-10-01 22:34:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:34:38,907 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2019-10-01 22:34:38,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-01 22:34:38,908 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 117 [2019-10-01 22:34:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:34:38,909 INFO L225 Difference]: With dead ends: 170 [2019-10-01 22:34:38,909 INFO L226 Difference]: Without dead ends: 125 [2019-10-01 22:34:38,910 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-10-01 22:34:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-01 22:34:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-10-01 22:34:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-01 22:34:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2019-10-01 22:34:38,914 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2019-10-01 22:34:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:34:38,915 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2019-10-01 22:34:38,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-01 22:34:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2019-10-01 22:34:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-01 22:34:38,916 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:34:38,916 INFO L411 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:34:38,916 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:34:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:34:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1107329854, now seen corresponding path program 36 times [2019-10-01 22:34:38,917 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:34:38,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:34:38,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:34:38,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:34:38,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:34:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:34:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-01 22:34:39,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:34:39,515 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:34:39,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:35:47,430 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2019-10-01 22:35:47,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:35:47,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 22:35:47,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:35:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 71 proven. 256 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-10-01 22:35:47,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:35:47,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21] total 58 [2019-10-01 22:35:47,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-01 22:35:47,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-01 22:35:47,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=2316, Unknown=0, NotChecked=0, Total=3306 [2019-10-01 22:35:47,917 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 58 states. [2019-10-01 22:35:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:35:49,041 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2019-10-01 22:35:49,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-01 22:35:49,041 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 119 [2019-10-01 22:35:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:35:49,042 INFO L225 Difference]: With dead ends: 176 [2019-10-01 22:35:49,042 INFO L226 Difference]: Without dead ends: 131 [2019-10-01 22:35:49,044 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1330, Invalid=4220, Unknown=0, NotChecked=0, Total=5550 [2019-10-01 22:35:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-01 22:35:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-10-01 22:35:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-01 22:35:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2019-10-01 22:35:49,050 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 119 [2019-10-01 22:35:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:35:49,050 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2019-10-01 22:35:49,050 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-01 22:35:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2019-10-01 22:35:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-01 22:35:49,052 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:35:49,052 INFO L411 BasicCegarLoop]: trace histogram [38, 38, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:35:49,052 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:35:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:35:49,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1108400936, now seen corresponding path program 37 times [2019-10-01 22:35:49,053 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:35:49,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:35:49,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:49,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:35:49,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:35:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-10-01 22:35:49,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:35:49,272 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:35:49,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:35:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:35:49,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-01 22:35:49,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:35:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-01 22:35:50,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:35:50,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 41] total 59 [2019-10-01 22:35:50,226 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-01 22:35:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-01 22:35:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=2413, Unknown=0, NotChecked=0, Total=3422 [2019-10-01 22:35:50,228 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 59 states. [2019-10-01 22:35:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:35:50,486 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2019-10-01 22:35:50,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-01 22:35:50,486 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2019-10-01 22:35:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:35:50,487 INFO L225 Difference]: With dead ends: 183 [2019-10-01 22:35:50,487 INFO L226 Difference]: Without dead ends: 136 [2019-10-01 22:35:50,488 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1009, Invalid=2413, Unknown=0, NotChecked=0, Total=3422 [2019-10-01 22:35:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-01 22:35:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2019-10-01 22:35:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-01 22:35:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2019-10-01 22:35:50,494 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2019-10-01 22:35:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:35:50,494 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2019-10-01 22:35:50,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-01 22:35:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2019-10-01 22:35:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-01 22:35:50,495 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:35:50,496 INFO L411 BasicCegarLoop]: trace histogram [39, 39, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:35:50,496 INFO L418 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:35:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:35:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1461946284, now seen corresponding path program 38 times [2019-10-01 22:35:50,496 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:35:50,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:35:50,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:50,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:35:50,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:35:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-01 22:35:51,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:35:51,289 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:35:51,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:35:51,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:35:51,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:35:51,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 41 conjunts are in the unsatisfiable core [2019-10-01 22:35:51,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:35:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-01 22:35:51,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:35:51,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-10-01 22:35:51,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-01 22:35:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-01 22:35:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-10-01 22:35:51,451 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 43 states. [2019-10-01 22:35:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:35:51,592 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2019-10-01 22:35:51,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-01 22:35:51,592 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 129 [2019-10-01 22:35:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:35:51,597 INFO L225 Difference]: With dead ends: 186 [2019-10-01 22:35:51,597 INFO L226 Difference]: Without dead ends: 137 [2019-10-01 22:35:51,598 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-10-01 22:35:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-01 22:35:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-10-01 22:35:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 22:35:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2019-10-01 22:35:51,602 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 129 [2019-10-01 22:35:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:35:51,602 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2019-10-01 22:35:51,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-01 22:35:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2019-10-01 22:35:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 22:35:51,603 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:35:51,605 INFO L411 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:35:51,605 INFO L418 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:35:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:35:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1556706574, now seen corresponding path program 39 times [2019-10-01 22:35:51,607 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:35:51,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:35:51,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:51,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:35:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:35:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-10-01 22:35:51,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:35:51,832 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:35:51,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:36:01,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-10-01 22:36:01,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:36:02,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 22:36:02,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:36:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 79 proven. 324 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2019-10-01 22:36:02,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:36:02,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 24 [2019-10-01 22:36:02,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 22:36:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 22:36:02,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:36:02,074 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 24 states. [2019-10-01 22:36:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:36:02,422 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2019-10-01 22:36:02,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 22:36:02,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 131 [2019-10-01 22:36:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:36:02,427 INFO L225 Difference]: With dead ends: 150 [2019-10-01 22:36:02,427 INFO L226 Difference]: Without dead ends: 139 [2019-10-01 22:36:02,427 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2019-10-01 22:36:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-01 22:36:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-10-01 22:36:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-01 22:36:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2019-10-01 22:36:02,432 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 131 [2019-10-01 22:36:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:36:02,432 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2019-10-01 22:36:02,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 22:36:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2019-10-01 22:36:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-01 22:36:02,433 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:36:02,433 INFO L411 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:36:02,434 INFO L418 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:36:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:36:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1316446768, now seen corresponding path program 40 times [2019-10-01 22:36:02,434 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:36:02,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:36:02,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:36:02,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:36:02,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:36:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:36:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-10-01 22:36:02,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:36:02,723 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:36:02,786 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:36:02,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:36:02,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:36:02,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-01 22:36:02,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:36:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-01 22:36:03,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:36:03,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 43] total 63 [2019-10-01 22:36:03,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-01 22:36:03,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-01 22:36:03,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=2773, Unknown=0, NotChecked=0, Total=3906 [2019-10-01 22:36:03,964 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 63 states. [2019-10-01 22:36:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:36:04,205 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2019-10-01 22:36:04,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-01 22:36:04,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 133 [2019-10-01 22:36:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:36:04,214 INFO L225 Difference]: With dead ends: 195 [2019-10-01 22:36:04,214 INFO L226 Difference]: Without dead ends: 144 [2019-10-01 22:36:04,215 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1133, Invalid=2773, Unknown=0, NotChecked=0, Total=3906 [2019-10-01 22:36:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-01 22:36:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2019-10-01 22:36:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-10-01 22:36:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2019-10-01 22:36:04,222 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 133 [2019-10-01 22:36:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:36:04,222 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2019-10-01 22:36:04,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-01 22:36:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2019-10-01 22:36:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-01 22:36:04,223 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:36:04,223 INFO L411 BasicCegarLoop]: trace histogram [41, 41, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:36:04,223 INFO L418 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:36:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:36:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1732340404, now seen corresponding path program 41 times [2019-10-01 22:36:04,224 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:36:04,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:36:04,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:36:04,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:36:04,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:36:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:36:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2019-10-01 22:36:04,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:36:04,622 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:36:04,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:38:39,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-10-01 22:38:39,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:38:39,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-01 22:38:39,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:38:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2019-10-01 22:38:40,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:38:40,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-10-01 22:38:40,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 22:38:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 22:38:40,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:38:40,037 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 24 states. [2019-10-01 22:38:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:38:40,103 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2019-10-01 22:38:40,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 22:38:40,104 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2019-10-01 22:38:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:38:40,105 INFO L225 Difference]: With dead ends: 156 [2019-10-01 22:38:40,105 INFO L226 Difference]: Without dead ends: 145 [2019-10-01 22:38:40,105 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 22:38:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-10-01 22:38:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-10-01 22:38:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-01 22:38:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2019-10-01 22:38:40,110 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2019-10-01 22:38:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:38:40,110 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2019-10-01 22:38:40,110 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 22:38:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2019-10-01 22:38:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-01 22:38:40,111 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:38:40,112 INFO L411 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:38:40,112 INFO L418 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:38:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:38:40,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1698134442, now seen corresponding path program 42 times [2019-10-01 22:38:40,112 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:38:40,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:38:40,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:38:40,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:38:40,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:38:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:38:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-01 22:38:40,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:38:40,850 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:38:40,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:41:29,198 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2019-10-01 22:41:29,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:41:29,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-01 22:41:29,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:41:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-01 22:41:29,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:41:29,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-10-01 22:41:29,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-01 22:41:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-01 22:41:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-10-01 22:41:29,298 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 45 states. [2019-10-01 22:41:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:41:29,417 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2019-10-01 22:41:29,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-01 22:41:29,417 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 139 [2019-10-01 22:41:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:41:29,418 INFO L225 Difference]: With dead ends: 202 [2019-10-01 22:41:29,418 INFO L226 Difference]: Without dead ends: 147 [2019-10-01 22:41:29,419 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-10-01 22:41:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-01 22:41:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2019-10-01 22:41:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-10-01 22:41:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2019-10-01 22:41:29,424 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 139 [2019-10-01 22:41:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:41:29,424 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2019-10-01 22:41:29,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-01 22:41:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2019-10-01 22:41:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-01 22:41:29,425 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:41:29,425 INFO L411 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:41:29,425 INFO L418 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:41:29,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:41:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1328980280, now seen corresponding path program 43 times [2019-10-01 22:41:29,426 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:41:29,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:41:29,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:41:29,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:41:29,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:41:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:41:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2019-10-01 22:41:29,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:41:29,701 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:41:29,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:41:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:41:29,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 44 conjunts are in the unsatisfiable core [2019-10-01 22:41:29,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:41:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-01 22:41:30,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:41:30,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 45] total 67 [2019-10-01 22:41:30,877 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-01 22:41:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-01 22:41:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1265, Invalid=3157, Unknown=0, NotChecked=0, Total=4422 [2019-10-01 22:41:30,879 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 67 states. [2019-10-01 22:41:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:41:31,109 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2019-10-01 22:41:31,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-01 22:41:31,109 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 141 [2019-10-01 22:41:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:41:31,111 INFO L225 Difference]: With dead ends: 207 [2019-10-01 22:41:31,111 INFO L226 Difference]: Without dead ends: 152 [2019-10-01 22:41:31,112 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1265, Invalid=3157, Unknown=0, NotChecked=0, Total=4422 [2019-10-01 22:41:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-01 22:41:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-10-01 22:41:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-01 22:41:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2019-10-01 22:41:31,117 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 141 [2019-10-01 22:41:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:41:31,118 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2019-10-01 22:41:31,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-01 22:41:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2019-10-01 22:41:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-01 22:41:31,119 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:41:31,119 INFO L411 BasicCegarLoop]: trace histogram [43, 43, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:41:31,119 INFO L418 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:41:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:41:31,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1567881796, now seen corresponding path program 44 times [2019-10-01 22:41:31,120 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:41:31,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:41:31,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:41:31,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:41:31,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:41:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:41:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-01 22:41:32,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:41:32,337 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:41:32,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:41:32,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:41:32,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:41:32,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-01 22:41:32,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:41:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-01 22:41:32,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:41:32,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-10-01 22:41:32,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-01 22:41:32,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-01 22:41:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-10-01 22:41:32,521 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 47 states. [2019-10-01 22:41:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:41:32,670 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2019-10-01 22:41:32,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-01 22:41:32,671 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 145 [2019-10-01 22:41:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:41:32,672 INFO L225 Difference]: With dead ends: 210 [2019-10-01 22:41:32,672 INFO L226 Difference]: Without dead ends: 153 [2019-10-01 22:41:32,672 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-10-01 22:41:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-01 22:41:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2019-10-01 22:41:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-01 22:41:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2019-10-01 22:41:32,678 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 145 [2019-10-01 22:41:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:41:32,679 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2019-10-01 22:41:32,679 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-01 22:41:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2019-10-01 22:41:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-01 22:41:32,680 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:41:32,680 INFO L411 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:41:32,680 INFO L418 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:41:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:41:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash 507580642, now seen corresponding path program 45 times [2019-10-01 22:41:32,680 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:41:32,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:41:32,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:41:32,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:41:32,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:41:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:41:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-01 22:41:33,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:41:33,493 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:41:33,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:42:17,076 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-10-01 22:42:17,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:17,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 22:42:17,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2019-10-01 22:42:17,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:17,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 25] total 70 [2019-10-01 22:42:17,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-01 22:42:17,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-01 22:42:17,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2019-10-01 22:42:17,692 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 70 states. [2019-10-01 22:42:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:17,977 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2019-10-01 22:42:17,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-01 22:42:17,978 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 147 [2019-10-01 22:42:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:17,978 INFO L225 Difference]: With dead ends: 215 [2019-10-01 22:42:17,978 INFO L226 Difference]: Without dead ends: 158 [2019-10-01 22:42:17,979 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2019-10-01 22:42:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-01 22:42:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2019-10-01 22:42:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-01 22:42:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2019-10-01 22:42:17,985 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2019-10-01 22:42:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:17,985 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2019-10-01 22:42:17,985 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-01 22:42:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2019-10-01 22:42:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-01 22:42:17,986 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:17,986 INFO L411 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:17,986 INFO L418 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1695416158, now seen corresponding path program 46 times [2019-10-01 22:42:17,987 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:17,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:17,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:17,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-01 22:42:18,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:18,839 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:18,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:42:18,987 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:42:18,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:42:18,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 22:42:18,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:42:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2019-10-01 22:42:19,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:42:19,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 26] total 72 [2019-10-01 22:42:19,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-01 22:42:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-01 22:42:19,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1452, Invalid=3660, Unknown=0, NotChecked=0, Total=5112 [2019-10-01 22:42:19,717 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 72 states. [2019-10-01 22:42:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:42:20,035 INFO L93 Difference]: Finished difference Result 221 states and 226 transitions. [2019-10-01 22:42:20,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-10-01 22:42:20,035 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 151 [2019-10-01 22:42:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:42:20,036 INFO L225 Difference]: With dead ends: 221 [2019-10-01 22:42:20,036 INFO L226 Difference]: Without dead ends: 162 [2019-10-01 22:42:20,037 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1452, Invalid=3660, Unknown=0, NotChecked=0, Total=5112 [2019-10-01 22:42:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-01 22:42:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-10-01 22:42:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-01 22:42:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2019-10-01 22:42:20,042 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 151 [2019-10-01 22:42:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:42:20,042 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2019-10-01 22:42:20,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-10-01 22:42:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2019-10-01 22:42:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-01 22:42:20,043 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:42:20,044 INFO L411 BasicCegarLoop]: trace histogram [46, 46, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:42:20,044 INFO L418 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:42:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:42:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1659387866, now seen corresponding path program 47 times [2019-10-01 22:42:20,044 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:42:20,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:42:20,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:20,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:42:20,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:42:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:42:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-01 22:42:20,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:42:20,942 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:42:21,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1