/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:49:13,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:49:13,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:49:13,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 01:49:13,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:49:13,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:49:13,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:49:13,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:49:13,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:49:13,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:49:13,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:49:13,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:49:13,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:49:13,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:49:13,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:49:13,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:49:13,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:49:13,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:49:13,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:49:13,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:49:13,633 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 [2020-07-20 01:49:13,652 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:49:13,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:49:13,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:49:13,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:49:13,654 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:49:13,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:49:13,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:49:13,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:49:13,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:49:13,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:49:13,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:49:13,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:49:13,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:49:13,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:49:13,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:49:13,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:49:13,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:49:13,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:49:13,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:49:13,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:49:13,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:49:13,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:49:13,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:49:13,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:49:13,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:49:13,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:49:13,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:49:13,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:49:13,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:49:13,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:49:13,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:49:13,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:49:13,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:49:13,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:49:13,985 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:49:13,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-20 01:49:14,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db5e0124/9aff20c0a78840c29f7306b5ce1f365d/FLAGfac1dbde0 [2020-07-20 01:49:14,525 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:49:14,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-20 01:49:14,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db5e0124/9aff20c0a78840c29f7306b5ce1f365d/FLAGfac1dbde0 [2020-07-20 01:49:14,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db5e0124/9aff20c0a78840c29f7306b5ce1f365d [2020-07-20 01:49:14,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:49:14,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:49:14,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:49:14,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:49:14,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:49:14,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:49:14" (1/1) ... [2020-07-20 01:49:14,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd08649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:14, skipping insertion in model container [2020-07-20 01:49:14,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:49:14" (1/1) ... [2020-07-20 01:49:14,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:49:15,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:49:15,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:49:15,198 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:49:15,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:49:15,233 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:49:15,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15 WrapperNode [2020-07-20 01:49:15,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:49:15,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:49:15,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:49:15,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:49:15,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (1/1) ... [2020-07-20 01:49:15,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:49:15,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:49:15,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:49:15,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:49:15,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (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 [2020-07-20 01:49:15,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:49:15,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:49:15,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:49:15,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:49:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:49:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:49:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:49:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:49:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:49:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:49:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:49:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:49:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:49:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:49:15,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:49:15,658 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 01:49:15,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:49:15 BoogieIcfgContainer [2020-07-20 01:49:15,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:49:15,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:49:15,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:49:15,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:49:15,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:49:14" (1/3) ... [2020-07-20 01:49:15,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef34f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:49:15, skipping insertion in model container [2020-07-20 01:49:15,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:15" (2/3) ... [2020-07-20 01:49:15,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef34f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:49:15, skipping insertion in model container [2020-07-20 01:49:15,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:49:15" (3/3) ... [2020-07-20 01:49:15,671 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-07-20 01:49:15,682 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:49:15,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:49:15,704 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:49:15,726 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:49:15,727 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:49:15,727 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:49:15,727 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:49:15,727 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:49:15,727 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:49:15,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:49:15,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:49:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 01:49:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:49:15,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:15,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:15,751 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-07-20 01:49:15,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:15,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281549756] [2020-07-20 01:49:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:16,077 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 01:49:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:16,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281549756] [2020-07-20 01:49:16,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:49:16,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:49:16,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953333653] [2020-07-20 01:49:16,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:49:16,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:49:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:49:16,128 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-20 01:49:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:16,221 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-20 01:49:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:49:16,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 01:49:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:16,233 INFO L225 Difference]: With dead ends: 42 [2020-07-20 01:49:16,233 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:49:16,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:49:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:49:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 01:49:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 01:49:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-20 01:49:16,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-07-20 01:49:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:16,275 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-20 01:49:16,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:49:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-20 01:49:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:49:16,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:16,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:16,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:49:16,277 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-07-20 01:49:16,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:16,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581428315] [2020-07-20 01:49:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:16,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581428315] [2020-07-20 01:49:16,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:49:16,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 01:49:16,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775365846] [2020-07-20 01:49:16,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:49:16,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:16,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:49:16,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:49:16,366 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-07-20 01:49:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:16,436 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 01:49:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:49:16,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 01:49:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:16,440 INFO L225 Difference]: With dead ends: 35 [2020-07-20 01:49:16,440 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 01:49:16,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:49:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 01:49:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-20 01:49:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 01:49:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-07-20 01:49:16,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-07-20 01:49:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:16,451 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-07-20 01:49:16,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:49:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-07-20 01:49:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 01:49:16,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:16,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:16,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:49:16,453 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-07-20 01:49:16,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:16,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125719763] [2020-07-20 01:49:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125719763] [2020-07-20 01:49:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920296015] [2020-07-20 01:49:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cee7187 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:16,597 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cee7187 issued 2 check-sat command(s) [2020-07-20 01:49:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:49:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:16,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:16,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-20 01:49:16,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104573343] [2020-07-20 01:49:16,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:49:16,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:49:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:49:16,700 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-07-20 01:49:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:16,823 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-07-20 01:49:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:49:16,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 01:49:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:16,826 INFO L225 Difference]: With dead ends: 45 [2020-07-20 01:49:16,826 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 01:49:16,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:49:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 01:49:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 01:49:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:49:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 01:49:16,843 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-20 01:49:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:16,845 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 01:49:16,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:49:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 01:49:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:49:16,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:16,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:17,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:49:17,063 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-07-20 01:49:17,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:17,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330252163] [2020-07-20 01:49:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:17,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330252163] [2020-07-20 01:49:17,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594644503] [2020-07-20 01:49:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7825b2b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:17,226 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7825b2b issued 2 check-sat command(s) [2020-07-20 01:49:17,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:49:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:17,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:17,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 01:49:17,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066206638] [2020-07-20 01:49:17,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:49:17,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:17,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:49:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:49:17,265 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-07-20 01:49:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:17,370 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-07-20 01:49:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:49:17,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 01:49:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:17,373 INFO L225 Difference]: With dead ends: 56 [2020-07-20 01:49:17,373 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:49:17,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:49:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:49:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-20 01:49:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 01:49:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-20 01:49:17,390 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-07-20 01:49:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:17,390 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-20 01:49:17,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:49:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-20 01:49:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:49:17,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:17,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:17,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:17,608 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-07-20 01:49:17,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:17,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872802357] [2020-07-20 01:49:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:17,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872802357] [2020-07-20 01:49:17,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962616880] [2020-07-20 01:49:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de7b94c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:17,747 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de7b94c issued 3 check-sat command(s) [2020-07-20 01:49:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:49:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:49:17,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:17,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 01:49:17,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147412196] [2020-07-20 01:49:17,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:49:17,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:49:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:49:17,771 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-07-20 01:49:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:17,886 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-07-20 01:49:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:49:17,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-20 01:49:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:17,887 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:49:17,887 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:49:17,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:49:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:49:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 01:49:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:49:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-20 01:49:17,896 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-07-20 01:49:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:17,896 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-20 01:49:17,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:49:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-20 01:49:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:49:17,897 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:17,898 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:18,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:18,111 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:18,112 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-07-20 01:49:18,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:18,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067515406] [2020-07-20 01:49:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 01:49:18,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067515406] [2020-07-20 01:49:18,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:49:18,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:49:18,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011198753] [2020-07-20 01:49:18,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:49:18,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:18,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:49:18,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:49:18,227 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-07-20 01:49:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:18,319 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 01:49:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:49:18,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-20 01:49:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:18,322 INFO L225 Difference]: With dead ends: 45 [2020-07-20 01:49:18,323 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 01:49:18,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:49:18,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 01:49:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 01:49:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:49:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 01:49:18,330 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-07-20 01:49:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:18,331 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 01:49:18,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:49:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 01:49:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:49:18,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:18,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:18,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 01:49:18,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-07-20 01:49:18,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:18,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466381172] [2020-07-20 01:49:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:18,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466381172] [2020-07-20 01:49:18,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287629404] [2020-07-20 01:49:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68c5ccc0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:18,491 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68c5ccc0 issued 2 check-sat command(s) [2020-07-20 01:49:18,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:49:18,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:18,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:18,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-20 01:49:18,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056310292] [2020-07-20 01:49:18,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:49:18,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:18,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:49:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:49:18,524 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 9 states. [2020-07-20 01:49:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:18,662 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-07-20 01:49:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:49:18,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 01:49:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:18,664 INFO L225 Difference]: With dead ends: 77 [2020-07-20 01:49:18,664 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:49:18,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:49:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:49:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-20 01:49:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:49:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-20 01:49:18,677 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-07-20 01:49:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:18,677 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-20 01:49:18,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:49:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-20 01:49:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:49:18,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:18,679 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:18,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:18,881 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-07-20 01:49:18,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:18,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169283181] [2020-07-20 01:49:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:18,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169283181] [2020-07-20 01:49:18,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093369406] [2020-07-20 01:49:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49cf9368 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:19,039 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49cf9368 issued 3 check-sat command(s) [2020-07-20 01:49:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:49:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:19,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:19,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-20 01:49:19,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109836462] [2020-07-20 01:49:19,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:49:19,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:49:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:49:19,063 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 10 states. [2020-07-20 01:49:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:19,200 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-07-20 01:49:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:49:19,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 01:49:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:19,201 INFO L225 Difference]: With dead ends: 88 [2020-07-20 01:49:19,202 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 01:49:19,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:49:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 01:49:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-07-20 01:49:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 01:49:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-20 01:49:19,210 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-07-20 01:49:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:19,210 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-20 01:49:19,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:49:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-20 01:49:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:49:19,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:19,212 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:19,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:19,425 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-07-20 01:49:19,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:19,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105487114] [2020-07-20 01:49:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105487114] [2020-07-20 01:49:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656294959] [2020-07-20 01:49:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7668da01 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:19,609 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7668da01 issued 3 check-sat command(s) [2020-07-20 01:49:19,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:49:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:19,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:19,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-20 01:49:19,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880060251] [2020-07-20 01:49:19,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:49:19,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:19,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:49:19,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:49:19,641 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-07-20 01:49:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:19,794 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-07-20 01:49:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:49:19,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 01:49:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:19,796 INFO L225 Difference]: With dead ends: 99 [2020-07-20 01:49:19,796 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:49:19,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:49:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:49:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-07-20 01:49:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 01:49:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-20 01:49:19,804 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-07-20 01:49:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:19,804 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-20 01:49:19,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:49:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-20 01:49:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 01:49:19,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:19,806 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:20,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:20,022 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:20,023 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-07-20 01:49:20,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:20,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133855374] [2020-07-20 01:49:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:20,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133855374] [2020-07-20 01:49:20,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932592268] [2020-07-20 01:49:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@225e6948 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:20,231 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@225e6948 issued 3 check-sat command(s) [2020-07-20 01:49:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:49:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:20,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:20,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-20 01:49:20,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153961495] [2020-07-20 01:49:20,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 01:49:20,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 01:49:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:49:20,262 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 12 states. [2020-07-20 01:49:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:20,412 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-07-20 01:49:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:49:20,413 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-20 01:49:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:20,414 INFO L225 Difference]: With dead ends: 110 [2020-07-20 01:49:20,415 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 01:49:20,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:49:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 01:49:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-07-20 01:49:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 01:49:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-07-20 01:49:20,423 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-07-20 01:49:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:20,424 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-07-20 01:49:20,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 01:49:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-07-20 01:49:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:49:20,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:20,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:20,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 01:49:20,639 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:20,640 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-07-20 01:49:20,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:20,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505137398] [2020-07-20 01:49:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:20,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505137398] [2020-07-20 01:49:20,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636983235] [2020-07-20 01:49:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a723431 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:20,864 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a723431 issued 3 check-sat command(s) [2020-07-20 01:49:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:49:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:20,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:20,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-20 01:49:20,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860448156] [2020-07-20 01:49:20,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:49:20,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:20,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:49:20,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:49:20,897 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 13 states. [2020-07-20 01:49:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:21,043 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-07-20 01:49:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 01:49:21,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-20 01:49:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:21,045 INFO L225 Difference]: With dead ends: 121 [2020-07-20 01:49:21,046 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 01:49:21,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:49:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 01:49:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-07-20 01:49:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 01:49:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-07-20 01:49:21,069 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-07-20 01:49:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:21,069 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-07-20 01:49:21,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:49:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-07-20 01:49:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 01:49:21,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:21,072 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:21,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-20 01:49:21,273 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-07-20 01:49:21,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:21,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631813134] [2020-07-20 01:49:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:21,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631813134] [2020-07-20 01:49:21,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565920009] [2020-07-20 01:49:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c33e1c4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:21,490 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c33e1c4 issued 3 check-sat command(s) [2020-07-20 01:49:21,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 01:49:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:21,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:21,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-20 01:49:21,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942016242] [2020-07-20 01:49:21,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:49:21,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:49:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:49:21,545 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 14 states. [2020-07-20 01:49:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:21,689 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-07-20 01:49:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:49:21,689 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-20 01:49:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:21,692 INFO L225 Difference]: With dead ends: 132 [2020-07-20 01:49:21,692 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 01:49:21,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:49:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 01:49:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-07-20 01:49:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 01:49:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-07-20 01:49:21,705 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-07-20 01:49:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:21,705 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-07-20 01:49:21,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:49:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-07-20 01:49:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 01:49:21,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:21,706 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:21,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:21,921 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-07-20 01:49:21,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:21,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072658414] [2020-07-20 01:49:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:22,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072658414] [2020-07-20 01:49:22,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395344530] [2020-07-20 01:49:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ef6de1e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:22,167 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ef6de1e issued 3 check-sat command(s) [2020-07-20 01:49:22,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:49:22,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:22,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:22,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-20 01:49:22,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387863362] [2020-07-20 01:49:22,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:49:22,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:22,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:49:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:49:22,197 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 15 states. [2020-07-20 01:49:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:22,369 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-07-20 01:49:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:49:22,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-20 01:49:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:22,371 INFO L225 Difference]: With dead ends: 143 [2020-07-20 01:49:22,371 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 01:49:22,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:49:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 01:49:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-07-20 01:49:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 01:49:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-07-20 01:49:22,389 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-07-20 01:49:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:22,389 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-07-20 01:49:22,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:49:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-07-20 01:49:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 01:49:22,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:22,395 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:22,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:22,608 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-07-20 01:49:22,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:22,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145061938] [2020-07-20 01:49:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:22,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145061938] [2020-07-20 01:49:22,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231792137] [2020-07-20 01:49:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b9c3d66 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:22,866 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b9c3d66 issued 3 check-sat command(s) [2020-07-20 01:49:22,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 01:49:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:22,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:22,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-20 01:49:22,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306943030] [2020-07-20 01:49:22,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:49:22,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:22,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:49:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:49:22,915 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 16 states. [2020-07-20 01:49:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:23,071 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-07-20 01:49:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:49:23,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-20 01:49:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:23,072 INFO L225 Difference]: With dead ends: 154 [2020-07-20 01:49:23,073 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 01:49:23,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:49:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 01:49:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-07-20 01:49:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 01:49:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-07-20 01:49:23,081 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-07-20 01:49:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:23,082 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-07-20 01:49:23,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:49:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-07-20 01:49:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 01:49:23,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:23,083 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:23,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 01:49:23,284 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-07-20 01:49:23,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:23,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575640270] [2020-07-20 01:49:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-20 01:49:23,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575640270] [2020-07-20 01:49:23,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093942906] [2020-07-20 01:49:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a5f8242 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:23,620 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a5f8242 issued 3 check-sat command(s) [2020-07-20 01:49:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:49:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:49:23,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:23,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 19 [2020-07-20 01:49:23,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946249430] [2020-07-20 01:49:23,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:49:23,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:49:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:49:23,827 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 19 states. [2020-07-20 01:49:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:24,086 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-07-20 01:49:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:49:24,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-07-20 01:49:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:24,088 INFO L225 Difference]: With dead ends: 167 [2020-07-20 01:49:24,088 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 01:49:24,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:49:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 01:49:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-20 01:49:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 01:49:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-07-20 01:49:24,094 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 42 [2020-07-20 01:49:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:24,095 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-07-20 01:49:24,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:49:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-07-20 01:49:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 01:49:24,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:24,096 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:24,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 01:49:24,298 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:24,298 INFO L82 PathProgramCache]: Analyzing trace with hash 961768194, now seen corresponding path program 10 times [2020-07-20 01:49:24,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:24,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288286037] [2020-07-20 01:49:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:24,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288286037] [2020-07-20 01:49:24,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257685160] [2020-07-20 01:49:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23364add No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:24,682 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23364add issued 2 check-sat command(s) [2020-07-20 01:49:24,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:24,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 01:49:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:24,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:24,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-20 01:49:24,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145611761] [2020-07-20 01:49:24,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:49:24,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:49:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:49:24,725 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 18 states. [2020-07-20 01:49:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:24,935 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-07-20 01:49:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:49:24,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-07-20 01:49:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:24,937 INFO L225 Difference]: With dead ends: 164 [2020-07-20 01:49:24,937 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 01:49:24,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:49:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 01:49:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-07-20 01:49:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 01:49:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-07-20 01:49:24,946 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-07-20 01:49:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:24,948 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-07-20 01:49:24,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:49:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-07-20 01:49:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 01:49:24,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:24,951 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:25,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 01:49:25,152 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash -662493340, now seen corresponding path program 11 times [2020-07-20 01:49:25,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:25,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455296453] [2020-07-20 01:49:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:25,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455296453] [2020-07-20 01:49:25,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464309266] [2020-07-20 01:49:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@da50a14 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:25,588 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@da50a14 issued 2 check-sat command(s) [2020-07-20 01:49:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:25,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:49:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:25,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:25,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-20 01:49:25,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898130310] [2020-07-20 01:49:25,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:49:25,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:49:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:49:25,618 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 19 states. [2020-07-20 01:49:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:25,790 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-07-20 01:49:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:49:25,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-20 01:49:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:25,793 INFO L225 Difference]: With dead ends: 175 [2020-07-20 01:49:25,793 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 01:49:25,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:49:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 01:49:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-07-20 01:49:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 01:49:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-07-20 01:49:25,798 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 94 [2020-07-20 01:49:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:25,799 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-07-20 01:49:25,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:49:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-07-20 01:49:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 01:49:25,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:25,800 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:26,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:26,002 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1790268230, now seen corresponding path program 12 times [2020-07-20 01:49:26,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:26,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421876992] [2020-07-20 01:49:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:26,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421876992] [2020-07-20 01:49:26,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93549798] [2020-07-20 01:49:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38f939ec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:26,617 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38f939ec issued 2 check-sat command(s) [2020-07-20 01:49:26,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:26,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 01:49:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:26,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:26,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-20 01:49:26,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184795991] [2020-07-20 01:49:26,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 01:49:26,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:26,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 01:49:26,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:49:26,660 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 20 states. [2020-07-20 01:49:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:26,880 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2020-07-20 01:49:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:49:26,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2020-07-20 01:49:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:26,882 INFO L225 Difference]: With dead ends: 186 [2020-07-20 01:49:26,882 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 01:49:26,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:49:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 01:49:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-07-20 01:49:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 01:49:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-07-20 01:49:26,887 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 96 [2020-07-20 01:49:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:26,888 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-07-20 01:49:26,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 01:49:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-07-20 01:49:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-20 01:49:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:26,889 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:27,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 01:49:27,090 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash 957091496, now seen corresponding path program 13 times [2020-07-20 01:49:27,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:27,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407775187] [2020-07-20 01:49:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:27,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407775187] [2020-07-20 01:49:27,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648639696] [2020-07-20 01:49:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b008585 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:27,879 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b008585 issued 2 check-sat command(s) [2020-07-20 01:49:27,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:49:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:27,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:27,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-20 01:49:27,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149074299] [2020-07-20 01:49:27,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:49:27,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:49:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:49:27,925 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 21 states. [2020-07-20 01:49:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:28,145 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-07-20 01:49:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:49:28,146 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-07-20 01:49:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:28,147 INFO L225 Difference]: With dead ends: 197 [2020-07-20 01:49:28,147 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 01:49:28,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:49:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 01:49:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2020-07-20 01:49:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-20 01:49:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-07-20 01:49:28,153 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 98 [2020-07-20 01:49:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:28,154 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-07-20 01:49:28,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:49:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-07-20 01:49:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 01:49:28,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:28,155 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:28,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:28,368 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -861832822, now seen corresponding path program 14 times [2020-07-20 01:49:28,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:28,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377063016] [2020-07-20 01:49:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:28,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377063016] [2020-07-20 01:49:28,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196286161] [2020-07-20 01:49:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a68f22f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:29,961 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a68f22f issued 3 check-sat command(s) [2020-07-20 01:49:29,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 01:49:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:30,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:30,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-20 01:49:30,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481939140] [2020-07-20 01:49:30,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 01:49:30,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 01:49:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:49:30,003 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 22 states. [2020-07-20 01:49:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:30,240 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-07-20 01:49:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 01:49:30,240 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-07-20 01:49:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:30,242 INFO L225 Difference]: With dead ends: 208 [2020-07-20 01:49:30,242 INFO L226 Difference]: Without dead ends: 131 [2020-07-20 01:49:30,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:49:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-20 01:49:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-07-20 01:49:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-20 01:49:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-07-20 01:49:30,248 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 100 [2020-07-20 01:49:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:30,248 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-07-20 01:49:30,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 01:49:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-07-20 01:49:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 01:49:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:30,250 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:30,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:30,460 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash -796412948, now seen corresponding path program 15 times [2020-07-20 01:49:30,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:30,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5890366] [2020-07-20 01:49:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5890366] [2020-07-20 01:49:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85062891] [2020-07-20 01:49:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60af3450 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:32,708 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60af3450 issued 3 check-sat command(s) [2020-07-20 01:49:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:49:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:32,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:32,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-20 01:49:32,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087656821] [2020-07-20 01:49:32,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 01:49:32,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 01:49:32,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:49:32,780 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 23 states. [2020-07-20 01:49:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:33,030 INFO L93 Difference]: Finished difference Result 219 states and 235 transitions. [2020-07-20 01:49:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:49:33,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-07-20 01:49:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:33,032 INFO L225 Difference]: With dead ends: 219 [2020-07-20 01:49:33,032 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 01:49:33,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:49:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 01:49:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-07-20 01:49:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 01:49:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-07-20 01:49:33,038 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 102 [2020-07-20 01:49:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:33,038 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-07-20 01:49:33,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 01:49:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-07-20 01:49:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-20 01:49:33,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:33,040 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:33,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 01:49:33,246 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1942543822, now seen corresponding path program 16 times [2020-07-20 01:49:33,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:33,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019636889] [2020-07-20 01:49:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:33,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019636889] [2020-07-20 01:49:33,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749285335] [2020-07-20 01:49:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b6e9ff6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:34,923 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b6e9ff6 issued 3 check-sat command(s) [2020-07-20 01:49:34,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 01:49:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:34,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:34,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-20 01:49:34,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029635743] [2020-07-20 01:49:34,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 01:49:34,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 01:49:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:49:34,963 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 24 states. [2020-07-20 01:49:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:35,213 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-07-20 01:49:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 01:49:35,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-07-20 01:49:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:35,217 INFO L225 Difference]: With dead ends: 230 [2020-07-20 01:49:35,217 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 01:49:35,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:49:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 01:49:35,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-07-20 01:49:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 01:49:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-07-20 01:49:35,224 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 104 [2020-07-20 01:49:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:35,225 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-07-20 01:49:35,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 01:49:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-07-20 01:49:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 01:49:35,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:35,226 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:35,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:35,439 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1265047344, now seen corresponding path program 17 times [2020-07-20 01:49:35,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:35,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644539491] [2020-07-20 01:49:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:35,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644539491] [2020-07-20 01:49:35,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170861423] [2020-07-20 01:49:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5365c2b9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:37,134 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5365c2b9 issued 3 check-sat command(s) [2020-07-20 01:49:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 01:49:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:37,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:37,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-07-20 01:49:37,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897488435] [2020-07-20 01:49:37,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 01:49:37,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 01:49:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:49:37,171 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 25 states. [2020-07-20 01:49:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:37,429 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-07-20 01:49:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:49:37,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 106 [2020-07-20 01:49:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:37,431 INFO L225 Difference]: With dead ends: 241 [2020-07-20 01:49:37,431 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 01:49:37,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:49:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 01:49:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2020-07-20 01:49:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 01:49:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-07-20 01:49:37,437 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 106 [2020-07-20 01:49:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:37,437 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-07-20 01:49:37,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 01:49:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-07-20 01:49:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 01:49:37,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:37,439 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:37,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-20 01:49:37,641 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:37,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1269006318, now seen corresponding path program 18 times [2020-07-20 01:49:37,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:37,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932550064] [2020-07-20 01:49:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:38,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932550064] [2020-07-20 01:49:38,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252844009] [2020-07-20 01:49:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@577ebb7a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:40,179 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@577ebb7a issued 3 check-sat command(s) [2020-07-20 01:49:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 01:49:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:40,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:40,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-07-20 01:49:40,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489187616] [2020-07-20 01:49:40,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 01:49:40,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:40,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 01:49:40,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-20 01:49:40,220 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 26 states. [2020-07-20 01:49:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:40,477 INFO L93 Difference]: Finished difference Result 252 states and 274 transitions. [2020-07-20 01:49:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 01:49:40,477 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-07-20 01:49:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:40,479 INFO L225 Difference]: With dead ends: 252 [2020-07-20 01:49:40,479 INFO L226 Difference]: Without dead ends: 159 [2020-07-20 01:49:40,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-20 01:49:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-20 01:49:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-07-20 01:49:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 01:49:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2020-07-20 01:49:40,486 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 108 [2020-07-20 01:49:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:40,487 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2020-07-20 01:49:40,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 01:49:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2020-07-20 01:49:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 01:49:40,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:40,488 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:40,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 01:49:40,699 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1248118668, now seen corresponding path program 19 times [2020-07-20 01:49:40,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:40,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801975970] [2020-07-20 01:49:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:41,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801975970] [2020-07-20 01:49:41,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164434771] [2020-07-20 01:49:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606b60df No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:43,194 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606b60df issued 3 check-sat command(s) [2020-07-20 01:49:43,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 01:49:43,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:43,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:43,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-07-20 01:49:43,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059989037] [2020-07-20 01:49:43,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 01:49:43,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 01:49:43,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-20 01:49:43,233 INFO L87 Difference]: Start difference. First operand 148 states and 159 transitions. Second operand 27 states. [2020-07-20 01:49:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:43,580 INFO L93 Difference]: Finished difference Result 263 states and 287 transitions. [2020-07-20 01:49:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:49:43,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 110 [2020-07-20 01:49:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:43,583 INFO L225 Difference]: With dead ends: 263 [2020-07-20 01:49:43,583 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 01:49:43,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-20 01:49:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 01:49:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2020-07-20 01:49:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-20 01:49:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2020-07-20 01:49:43,592 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 110 [2020-07-20 01:49:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:43,593 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2020-07-20 01:49:43,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 01:49:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2020-07-20 01:49:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-20 01:49:43,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:43,595 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:43,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:43,810 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1645043798, now seen corresponding path program 20 times [2020-07-20 01:49:43,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:43,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355993134] [2020-07-20 01:49:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:44,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355993134] [2020-07-20 01:49:44,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189296420] [2020-07-20 01:49:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c281c6e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:46,725 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c281c6e issued 3 check-sat command(s) [2020-07-20 01:49:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 01:49:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:46,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:46,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2020-07-20 01:49:46,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941790223] [2020-07-20 01:49:46,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 01:49:46,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:46,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 01:49:46,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-20 01:49:46,767 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand 28 states. [2020-07-20 01:49:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:47,104 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-07-20 01:49:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 01:49:47,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-07-20 01:49:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:47,106 INFO L225 Difference]: With dead ends: 274 [2020-07-20 01:49:47,106 INFO L226 Difference]: Without dead ends: 173 [2020-07-20 01:49:47,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-20 01:49:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-20 01:49:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2020-07-20 01:49:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-20 01:49:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-07-20 01:49:47,113 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 112 [2020-07-20 01:49:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:47,114 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-07-20 01:49:47,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 01:49:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-07-20 01:49:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 01:49:47,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:47,115 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:47,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 01:49:47,327 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1164634184, now seen corresponding path program 21 times [2020-07-20 01:49:47,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:47,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975818574] [2020-07-20 01:49:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:47,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975818574] [2020-07-20 01:49:47,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272680938] [2020-07-20 01:49:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c6bf857 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:50,719 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c6bf857 issued 3 check-sat command(s) [2020-07-20 01:49:50,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 01:49:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:50,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:50,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-07-20 01:49:50,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591731259] [2020-07-20 01:49:50,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 01:49:50,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 01:49:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:49:50,765 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 29 states. [2020-07-20 01:49:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:51,108 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2020-07-20 01:49:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:49:51,110 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2020-07-20 01:49:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:51,111 INFO L225 Difference]: With dead ends: 285 [2020-07-20 01:49:51,111 INFO L226 Difference]: Without dead ends: 180 [2020-07-20 01:49:51,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:49:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-20 01:49:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2020-07-20 01:49:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-20 01:49:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2020-07-20 01:49:51,117 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 114 [2020-07-20 01:49:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:51,118 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2020-07-20 01:49:51,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 01:49:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2020-07-20 01:49:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-20 01:49:51,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:51,119 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:51,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:51,326 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash 269254298, now seen corresponding path program 22 times [2020-07-20 01:49:51,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:51,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243660789] [2020-07-20 01:49:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:51,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243660789] [2020-07-20 01:49:51,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145784559] [2020-07-20 01:49:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@18ac794c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:57,912 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@18ac794c issued 3 check-sat command(s) [2020-07-20 01:49:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 01:49:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:57,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:57,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2020-07-20 01:49:57,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691760565] [2020-07-20 01:49:57,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 01:49:57,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:57,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 01:49:57,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-20 01:49:57,986 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand 30 states. [2020-07-20 01:49:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:58,342 INFO L93 Difference]: Finished difference Result 296 states and 326 transitions. [2020-07-20 01:49:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 01:49:58,343 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-07-20 01:49:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:58,345 INFO L225 Difference]: With dead ends: 296 [2020-07-20 01:49:58,345 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 01:49:58,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-20 01:49:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 01:49:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 172. [2020-07-20 01:49:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-20 01:49:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2020-07-20 01:49:58,351 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 116 [2020-07-20 01:49:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:58,351 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2020-07-20 01:49:58,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 01:49:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2020-07-20 01:49:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-20 01:49:58,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:58,352 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:58,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 01:49:58,566 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash -448416516, now seen corresponding path program 23 times [2020-07-20 01:49:58,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:58,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596537178] [2020-07-20 01:49:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:49:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:49:59,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596537178] [2020-07-20 01:49:59,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150545074] [2020-07-20 01:49:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31bcf356 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:05,238 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31bcf356 issued 3 check-sat command(s) [2020-07-20 01:50:05,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:05,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 01:50:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:05,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:05,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-07-20 01:50:05,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324217278] [2020-07-20 01:50:05,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 01:50:05,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 01:50:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-20 01:50:05,303 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand 31 states. [2020-07-20 01:50:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:05,674 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-07-20 01:50:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:50:05,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2020-07-20 01:50:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:05,679 INFO L225 Difference]: With dead ends: 307 [2020-07-20 01:50:05,679 INFO L226 Difference]: Without dead ends: 194 [2020-07-20 01:50:05,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-20 01:50:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-20 01:50:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 178. [2020-07-20 01:50:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-20 01:50:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2020-07-20 01:50:05,688 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 118 [2020-07-20 01:50:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:05,689 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2020-07-20 01:50:05,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 01:50:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2020-07-20 01:50:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-20 01:50:05,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:05,690 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:05,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 01:50:05,904 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1359665886, now seen corresponding path program 24 times [2020-07-20 01:50:05,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:05,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621317544] [2020-07-20 01:50:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:50:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:06,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621317544] [2020-07-20 01:50:06,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826592661] [2020-07-20 01:50:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d5df6d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:12,407 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d5df6d issued 3 check-sat command(s) [2020-07-20 01:50:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:12,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 01:50:12,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:12,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:12,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2020-07-20 01:50:12,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629049995] [2020-07-20 01:50:12,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 01:50:12,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 01:50:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:50:12,480 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 32 states. [2020-07-20 01:50:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:12,869 INFO L93 Difference]: Finished difference Result 318 states and 352 transitions. [2020-07-20 01:50:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 01:50:12,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-07-20 01:50:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:12,871 INFO L225 Difference]: With dead ends: 318 [2020-07-20 01:50:12,871 INFO L226 Difference]: Without dead ends: 201 [2020-07-20 01:50:12,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:50:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-20 01:50:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2020-07-20 01:50:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 01:50:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 201 transitions. [2020-07-20 01:50:12,880 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 201 transitions. Word has length 120 [2020-07-20 01:50:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:12,880 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 201 transitions. [2020-07-20 01:50:12,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 01:50:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 201 transitions. [2020-07-20 01:50:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 01:50:12,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:12,881 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:13,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:13,095 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash -534900672, now seen corresponding path program 25 times [2020-07-20 01:50:13,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:13,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124745103] [2020-07-20 01:50:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:50:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:13,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124745103] [2020-07-20 01:50:13,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129232818] [2020-07-20 01:50:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e345fca No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:31,461 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e345fca issued 3 check-sat command(s) [2020-07-20 01:50:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 01:50:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:31,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:31,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2020-07-20 01:50:31,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137757925] [2020-07-20 01:50:31,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 01:50:31,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 01:50:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 01:50:31,652 INFO L87 Difference]: Start difference. First operand 184 states and 201 transitions. Second operand 33 states. [2020-07-20 01:50:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:32,058 INFO L93 Difference]: Finished difference Result 329 states and 365 transitions. [2020-07-20 01:50:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:50:32,058 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-07-20 01:50:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:32,060 INFO L225 Difference]: With dead ends: 329 [2020-07-20 01:50:32,060 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 01:50:32,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 01:50:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 01:50:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-07-20 01:50:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 01:50:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 208 transitions. [2020-07-20 01:50:32,066 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 208 transitions. Word has length 122 [2020-07-20 01:50:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:32,067 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 208 transitions. [2020-07-20 01:50:32,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 01:50:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 208 transitions. [2020-07-20 01:50:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 01:50:32,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:32,068 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:32,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:32,273 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash -147229406, now seen corresponding path program 26 times [2020-07-20 01:50:32,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:32,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425016833] [2020-07-20 01:50:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:50:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:32,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425016833] [2020-07-20 01:50:32,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387624411] [2020-07-20 01:50:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@743da552 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:36,585 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@743da552 issued 3 check-sat command(s) [2020-07-20 01:50:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:36,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 01:50:36,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:36,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:36,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2020-07-20 01:50:36,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379665989] [2020-07-20 01:50:36,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 01:50:36,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 01:50:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 01:50:36,642 INFO L87 Difference]: Start difference. First operand 190 states and 208 transitions. Second operand 34 states. [2020-07-20 01:50:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:37,109 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2020-07-20 01:50:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 01:50:37,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-07-20 01:50:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:37,111 INFO L225 Difference]: With dead ends: 340 [2020-07-20 01:50:37,111 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 01:50:37,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 01:50:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 01:50:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-07-20 01:50:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-20 01:50:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2020-07-20 01:50:37,123 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 124 [2020-07-20 01:50:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:37,124 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2020-07-20 01:50:37,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 01:50:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2020-07-20 01:50:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 01:50:37,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:37,126 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:37,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-20 01:50:37,339 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1257297532, now seen corresponding path program 27 times [2020-07-20 01:50:37,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:37,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213953818] [2020-07-20 01:50:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:50:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:37,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213953818] [2020-07-20 01:50:37,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650966863] [2020-07-20 01:50:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a561739 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:44,909 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a561739 issued 3 check-sat command(s) [2020-07-20 01:50:44,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 01:50:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:44,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:44,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2020-07-20 01:50:44,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386308658] [2020-07-20 01:50:44,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 01:50:44,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 01:50:44,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:50:44,999 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand 35 states. [2020-07-20 01:50:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:45,402 INFO L93 Difference]: Finished difference Result 351 states and 391 transitions. [2020-07-20 01:50:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 01:50:45,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 126 [2020-07-20 01:50:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:45,405 INFO L225 Difference]: With dead ends: 351 [2020-07-20 01:50:45,405 INFO L226 Difference]: Without dead ends: 222 [2020-07-20 01:50:45,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:50:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-20 01:50:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2020-07-20 01:50:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-20 01:50:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 222 transitions. [2020-07-20 01:50:45,418 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 222 transitions. Word has length 126 [2020-07-20 01:50:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:45,419 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 222 transitions. [2020-07-20 01:50:45,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 01:50:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 222 transitions. [2020-07-20 01:50:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 01:50:45,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:45,421 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:45,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:45,621 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:45,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1414090086, now seen corresponding path program 28 times [2020-07-20 01:50:45,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:45,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627742276] [2020-07-20 01:50:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:50:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:46,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627742276] [2020-07-20 01:50:46,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152364999] [2020-07-20 01:50:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5338b7a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:50:55,358 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5338b7a issued 3 check-sat command(s) [2020-07-20 01:50:55,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 01:50:55,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:55,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:55,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2020-07-20 01:50:55,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237968422] [2020-07-20 01:50:55,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 01:50:55,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 01:50:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 01:50:55,431 INFO L87 Difference]: Start difference. First operand 202 states and 222 transitions. Second operand 36 states. [2020-07-20 01:50:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:55,841 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2020-07-20 01:50:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 01:50:55,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 128 [2020-07-20 01:50:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:55,843 INFO L225 Difference]: With dead ends: 362 [2020-07-20 01:50:55,844 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 01:50:55,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 01:50:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 01:50:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2020-07-20 01:50:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-20 01:50:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2020-07-20 01:50:55,851 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 128 [2020-07-20 01:50:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:55,851 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2020-07-20 01:50:55,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 01:50:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2020-07-20 01:50:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-20 01:50:55,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:55,852 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:56,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-20 01:50:56,065 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:56,066 INFO L82 PathProgramCache]: Analyzing trace with hash 227147976, now seen corresponding path program 29 times [2020-07-20 01:50:56,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:56,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311526514] [2020-07-20 01:50:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:50:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:50:56,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311526514] [2020-07-20 01:50:56,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012357655] [2020-07-20 01:50:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@306bed16 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:23,232 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@306bed16 issued 3 check-sat command(s) [2020-07-20 01:51:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:23,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 01:51:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:51:23,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:23,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2020-07-20 01:51:23,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118261823] [2020-07-20 01:51:23,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 01:51:23,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 01:51:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 01:51:23,437 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand 37 states. [2020-07-20 01:51:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:23,885 INFO L93 Difference]: Finished difference Result 373 states and 417 transitions. [2020-07-20 01:51:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 01:51:23,886 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 130 [2020-07-20 01:51:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:23,887 INFO L225 Difference]: With dead ends: 373 [2020-07-20 01:51:23,888 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 01:51:23,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 01:51:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 01:51:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2020-07-20 01:51:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 01:51:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2020-07-20 01:51:23,894 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 130 [2020-07-20 01:51:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:23,895 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2020-07-20 01:51:23,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 01:51:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2020-07-20 01:51:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-20 01:51:23,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:23,896 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:24,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 01:51:24,109 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:24,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2037081002, now seen corresponding path program 30 times [2020-07-20 01:51:24,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:24,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924348668] [2020-07-20 01:51:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:51:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:51:24,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924348668] [2020-07-20 01:51:24,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730623964] [2020-07-20 01:51:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b11fbfb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:04,524 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b11fbfb issued 3 check-sat command(s) [2020-07-20 01:52:04,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:52:04,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 01:52:04,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:52:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:52:04,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:52:04,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2020-07-20 01:52:04,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316382276] [2020-07-20 01:52:04,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 01:52:04,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 01:52:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 01:52:04,888 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 38 states. [2020-07-20 01:52:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:05,362 INFO L93 Difference]: Finished difference Result 384 states and 430 transitions. [2020-07-20 01:52:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 01:52:05,363 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2020-07-20 01:52:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:05,365 INFO L225 Difference]: With dead ends: 384 [2020-07-20 01:52:05,365 INFO L226 Difference]: Without dead ends: 243 [2020-07-20 01:52:05,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 01:52:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-20 01:52:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 220. [2020-07-20 01:52:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-20 01:52:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 243 transitions. [2020-07-20 01:52:05,370 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 243 transitions. Word has length 132 [2020-07-20 01:52:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:05,370 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 243 transitions. [2020-07-20 01:52:05,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 01:52:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 243 transitions. [2020-07-20 01:52:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 01:52:05,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:05,371 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:05,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-20 01:52:05,572 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:05,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1920964108, now seen corresponding path program 31 times [2020-07-20 01:52:05,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:05,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208275559] [2020-07-20 01:52:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:52:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:52:06,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208275559] [2020-07-20 01:52:06,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947075264] [2020-07-20 01:52:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e5d8745 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:28,822 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e5d8745 issued 3 check-sat command(s) [2020-07-20 01:52:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:52:28,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 01:52:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:52:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:52:28,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:52:28,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2020-07-20 01:52:28,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892314201] [2020-07-20 01:52:28,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 01:52:28,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 01:52:28,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 01:52:28,997 INFO L87 Difference]: Start difference. First operand 220 states and 243 transitions. Second operand 39 states. [2020-07-20 01:52:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:29,487 INFO L93 Difference]: Finished difference Result 395 states and 443 transitions. [2020-07-20 01:52:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 01:52:29,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 134 [2020-07-20 01:52:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:29,490 INFO L225 Difference]: With dead ends: 395 [2020-07-20 01:52:29,490 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 01:52:29,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 01:52:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 01:52:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2020-07-20 01:52:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-20 01:52:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2020-07-20 01:52:29,496 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 134 [2020-07-20 01:52:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:29,496 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2020-07-20 01:52:29,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 01:52:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2020-07-20 01:52:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 01:52:29,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:29,498 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:29,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 01:52:29,711 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2001778670, now seen corresponding path program 32 times [2020-07-20 01:52:29,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:29,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477102831] [2020-07-20 01:52:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:52:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:52:30,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477102831] [2020-07-20 01:52:30,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180307097] [2020-07-20 01:52:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36a43b7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:52:52,139 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36a43b7 issued 3 check-sat command(s) [2020-07-20 01:52:52,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:52:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 01:52:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:52:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:52:52,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:52:52,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2020-07-20 01:52:52,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571577407] [2020-07-20 01:52:52,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 01:52:52,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:52:52,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 01:52:52,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 01:52:52,302 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand 40 states. [2020-07-20 01:52:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:52:52,800 INFO L93 Difference]: Finished difference Result 406 states and 456 transitions. [2020-07-20 01:52:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 01:52:52,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 136 [2020-07-20 01:52:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:52:52,802 INFO L225 Difference]: With dead ends: 406 [2020-07-20 01:52:52,802 INFO L226 Difference]: Without dead ends: 257 [2020-07-20 01:52:52,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 01:52:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-20 01:52:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2020-07-20 01:52:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 01:52:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 257 transitions. [2020-07-20 01:52:52,809 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 257 transitions. Word has length 136 [2020-07-20 01:52:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:52:52,809 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 257 transitions. [2020-07-20 01:52:52,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 01:52:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 257 transitions. [2020-07-20 01:52:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-20 01:52:52,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:52:52,810 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:52:53,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 01:52:53,013 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:52:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:52:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1939805872, now seen corresponding path program 33 times [2020-07-20 01:52:53,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:52:53,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787889071] [2020-07-20 01:52:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:52:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:52:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:52:53,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787889071] [2020-07-20 01:52:53,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628901908] [2020-07-20 01:52:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d90b8bd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:20,083 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d90b8bd issued 3 check-sat command(s) [2020-07-20 01:53:20,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 01:53:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:53:20,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:20,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2020-07-20 01:53:20,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156721463] [2020-07-20 01:53:20,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 01:53:20,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:20,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 01:53:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:53:20,272 INFO L87 Difference]: Start difference. First operand 232 states and 257 transitions. Second operand 41 states. [2020-07-20 01:53:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:20,799 INFO L93 Difference]: Finished difference Result 417 states and 469 transitions. [2020-07-20 01:53:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 01:53:20,799 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 138 [2020-07-20 01:53:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:20,801 INFO L225 Difference]: With dead ends: 417 [2020-07-20 01:53:20,801 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 01:53:20,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:53:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 01:53:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 238. [2020-07-20 01:53:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-20 01:53:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-07-20 01:53:20,807 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 138 [2020-07-20 01:53:20,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:20,808 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-07-20 01:53:20,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 01:53:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-07-20 01:53:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-20 01:53:20,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:20,809 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:21,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 01:53:21,023 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1641395662, now seen corresponding path program 34 times [2020-07-20 01:53:21,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:21,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370145672] [2020-07-20 01:53:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:53:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:53:21,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370145672] [2020-07-20 01:53:21,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839229936] [2020-07-20 01:53:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b29d60 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:54:03,541 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b29d60 issued 3 check-sat command(s) [2020-07-20 01:54:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:54:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 01:54:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:54:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:54:03,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:54:03,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2020-07-20 01:54:03,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397190937] [2020-07-20 01:54:03,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 01:54:03,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:54:03,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 01:54:03,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 01:54:03,908 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 42 states. [2020-07-20 01:54:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:54:04,434 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2020-07-20 01:54:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 01:54:04,435 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 140 [2020-07-20 01:54:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:54:04,436 INFO L225 Difference]: With dead ends: 428 [2020-07-20 01:54:04,437 INFO L226 Difference]: Without dead ends: 271 [2020-07-20 01:54:04,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 01:54:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-20 01:54:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 244. [2020-07-20 01:54:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-20 01:54:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2020-07-20 01:54:04,443 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 140 [2020-07-20 01:54:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:54:04,443 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2020-07-20 01:54:04,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 01:54:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2020-07-20 01:54:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 01:54:04,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:54:04,444 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:54:04,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 01:54:04,656 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:54:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:54:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1662974612, now seen corresponding path program 35 times [2020-07-20 01:54:04,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:54:04,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624273672] [2020-07-20 01:54:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:54:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:54:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:54:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:54:05,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624273672] [2020-07-20 01:54:05,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854944124] [2020-07-20 01:54:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@561d4268 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:37,480 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@561d4268 issued 3 check-sat command(s) [2020-07-20 01:56:37,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:56:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 01:56:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:56:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:56:41,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:56:41,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2020-07-20 01:56:41,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855591261] [2020-07-20 01:56:41,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 01:56:41,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:56:41,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 01:56:41,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:56:41,204 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 43 states. [2020-07-20 01:56:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:56:41,679 INFO L93 Difference]: Finished difference Result 439 states and 495 transitions. [2020-07-20 01:56:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 01:56:41,680 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 142 [2020-07-20 01:56:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:56:41,683 INFO L225 Difference]: With dead ends: 439 [2020-07-20 01:56:41,683 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 01:56:41,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:56:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 01:56:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 250. [2020-07-20 01:56:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-20 01:56:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-07-20 01:56:41,690 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 142 [2020-07-20 01:56:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:56:41,691 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-07-20 01:56:41,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 01:56:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-07-20 01:56:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-20 01:56:41,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:56:41,692 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:56:41,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:41,893 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:56:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:56:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1112991114, now seen corresponding path program 36 times [2020-07-20 01:56:41,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:56:41,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641926984] [2020-07-20 01:56:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:56:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:56:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:56:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:56:42,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641926984] [2020-07-20 01:56:42,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36043066] [2020-07-20 01:56:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d538146 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:58:29,707 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d538146 issued 3 check-sat command(s) [2020-07-20 01:58:29,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:58:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 01:58:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:58:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:58:31,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:58:31,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2020-07-20 01:58:31,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841193173] [2020-07-20 01:58:31,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 01:58:31,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:58:31,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 01:58:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 01:58:31,250 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 44 states. [2020-07-20 01:58:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:58:31,775 INFO L93 Difference]: Finished difference Result 450 states and 508 transitions. [2020-07-20 01:58:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 01:58:31,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 144 [2020-07-20 01:58:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:58:31,778 INFO L225 Difference]: With dead ends: 450 [2020-07-20 01:58:31,778 INFO L226 Difference]: Without dead ends: 285 [2020-07-20 01:58:31,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 01:58:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-20 01:58:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 256. [2020-07-20 01:58:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-20 01:58:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2020-07-20 01:58:31,786 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 144 [2020-07-20 01:58:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:58:31,786 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2020-07-20 01:58:31,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 01:58:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2020-07-20 01:58:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-20 01:58:31,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:58:31,787 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:58:32,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:58:32,002 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:58:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:58:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1641362984, now seen corresponding path program 37 times [2020-07-20 01:58:32,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:58:32,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829189663] [2020-07-20 01:58:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:58:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:58:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:58:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:58:32,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829189663] [2020-07-20 01:58:32,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130506635] [2020-07-20 01:58:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51311233 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:59:14,124 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51311233 issued 3 check-sat command(s) [2020-07-20 01:59:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:59:14,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 01:59:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:59:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:59:14,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:59:14,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2020-07-20 01:59:14,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235766399] [2020-07-20 01:59:14,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 01:59:14,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:59:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 01:59:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:59:14,668 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 45 states. [2020-07-20 01:59:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:59:15,171 INFO L93 Difference]: Finished difference Result 461 states and 521 transitions. [2020-07-20 01:59:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-20 01:59:15,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 146 [2020-07-20 01:59:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:59:15,173 INFO L225 Difference]: With dead ends: 461 [2020-07-20 01:59:15,173 INFO L226 Difference]: Without dead ends: 292 [2020-07-20 01:59:15,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:59:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-20 01:59:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2020-07-20 01:59:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-20 01:59:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 292 transitions. [2020-07-20 01:59:15,181 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 292 transitions. Word has length 146 [2020-07-20 01:59:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:59:15,183 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 292 transitions. [2020-07-20 01:59:15,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 01:59:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 292 transitions. [2020-07-20 01:59:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 01:59:15,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:59:15,185 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:59:15,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:59:15,399 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:59:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:59:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1694378170, now seen corresponding path program 38 times [2020-07-20 01:59:15,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:59:15,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549217902] [2020-07-20 01:59:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:59:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:59:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:59:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:59:16,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549217902] [2020-07-20 01:59:16,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893072205] [2020-07-20 01:59:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d813cb5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:59:47,368 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d813cb5 issued 3 check-sat command(s) [2020-07-20 01:59:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:59:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 01:59:47,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:59:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:59:47,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:59:47,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2020-07-20 01:59:47,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616366844] [2020-07-20 01:59:47,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 01:59:47,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:59:47,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 01:59:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 01:59:47,684 INFO L87 Difference]: Start difference. First operand 262 states and 292 transitions. Second operand 46 states. [2020-07-20 01:59:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:59:48,209 INFO L93 Difference]: Finished difference Result 472 states and 534 transitions. [2020-07-20 01:59:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 01:59:48,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-07-20 01:59:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:59:48,211 INFO L225 Difference]: With dead ends: 472 [2020-07-20 01:59:48,211 INFO L226 Difference]: Without dead ends: 299 [2020-07-20 01:59:48,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 01:59:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-20 01:59:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 268. [2020-07-20 01:59:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-20 01:59:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2020-07-20 01:59:48,223 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 148 [2020-07-20 01:59:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:59:48,223 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2020-07-20 01:59:48,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 01:59:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2020-07-20 01:59:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 01:59:48,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:59:48,224 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:59:48,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-20 01:59:48,438 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:59:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:59:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -998942948, now seen corresponding path program 39 times [2020-07-20 01:59:48,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:59:48,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822190143] [2020-07-20 01:59:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 01:59:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:59:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:59:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 01:59:49,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822190143] [2020-07-20 01:59:49,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969356201] [2020-07-20 01:59:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@89f7289 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:58,063 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@89f7289 issued 3 check-sat command(s) [2020-07-20 02:01:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 02:02:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 02:02:00,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 02:02:00,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2020-07-20 02:02:00,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125555111] [2020-07-20 02:02:00,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-20 02:02:00,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-20 02:02:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 02:02:00,426 INFO L87 Difference]: Start difference. First operand 268 states and 299 transitions. Second operand 47 states. [2020-07-20 02:02:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:00,978 INFO L93 Difference]: Finished difference Result 483 states and 547 transitions. [2020-07-20 02:02:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-20 02:02:00,979 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 150 [2020-07-20 02:02:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:00,981 INFO L225 Difference]: With dead ends: 483 [2020-07-20 02:02:00,981 INFO L226 Difference]: Without dead ends: 306 [2020-07-20 02:02:00,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 02:02:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-20 02:02:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 274. [2020-07-20 02:02:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 02:02:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 306 transitions. [2020-07-20 02:02:00,988 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 306 transitions. Word has length 150 [2020-07-20 02:02:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:00,988 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 306 transitions. [2020-07-20 02:02:00,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-20 02:02:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 306 transitions. [2020-07-20 02:02:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-20 02:02:00,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:00,990 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:01,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:01,203 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:01,203 INFO L82 PathProgramCache]: Analyzing trace with hash 584742142, now seen corresponding path program 40 times [2020-07-20 02:02:01,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:01,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658059539] [2020-07-20 02:02:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36cc026a [2020-07-20 02:02:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:02:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:02:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 02:02:02,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658059539] [2020-07-20 02:02:02,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841794406] [2020-07-20 02:02:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8f15ae1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true