/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:30:19,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:30:19,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:30:19,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 14:30:19,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:30:19,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:30:19,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:30:19,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:30:19,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:30:19,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:30:19,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:30:19,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:30:19,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:30:19,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:30:19,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:30:19,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:30:19,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:30:19,931 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 14:30:19,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:30:19,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:30:19,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:30:19,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:30:19,953 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:30:19,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:30:19,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:30:19,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:30:19,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:30:19,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:30:19,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:30:19,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:30:19,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:30:19,956 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:30:19,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:30:19,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:30:19,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:30:19,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:30:19,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:30:19,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:30:19,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:30:19,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:30:19,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:30:19,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:30:19,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:30:19,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:30:19,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:19,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:30:19,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:30:19,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-20 14:30:20,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:30:20,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:30:20,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:30:20,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:30:20,261 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:30:20,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-20 14:30:20,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047ec901c/868a06bd23f3402dbd23ae8278ec524d/FLAGb56589c22 [2020-07-20 14:30:20,765 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:30:20,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-20 14:30:20,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047ec901c/868a06bd23f3402dbd23ae8278ec524d/FLAGb56589c22 [2020-07-20 14:30:21,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047ec901c/868a06bd23f3402dbd23ae8278ec524d [2020-07-20 14:30:21,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:30:21,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:30:21,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:30:21,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:30:21,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:30:21,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419ad10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21, skipping insertion in model container [2020-07-20 14:30:21,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:30:21,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:30:21,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:30:21,408 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:30:21,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:30:21,440 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:30:21,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21 WrapperNode [2020-07-20 14:30:21,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:30:21,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:30:21,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:30:21,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:30:21,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ... [2020-07-20 14:30:21,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:30:21,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:30:21,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:30:21,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:30:21,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (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 14:30:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:30:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:30:21,617 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:30:21,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:30:21,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:30:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:30:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:30:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:30:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:30:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:30:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:30:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:30:21,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:30:21,860 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:30:21,860 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:30:21,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:30:21 BoogieIcfgContainer [2020-07-20 14:30:21,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:30:21,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:30:21,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:30:21,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:30:21,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:30:21" (1/3) ... [2020-07-20 14:30:21,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c0f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:30:21, skipping insertion in model container [2020-07-20 14:30:21,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (2/3) ... [2020-07-20 14:30:21,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c0f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:30:21, skipping insertion in model container [2020-07-20 14:30:21,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:30:21" (3/3) ... [2020-07-20 14:30:21,873 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-07-20 14:30:21,885 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:30:21,893 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:30:21,908 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:30:21,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:30:21,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:30:21,931 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:30:21,932 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:30:21,932 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:30:21,932 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:30:21,932 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:30:21,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:30:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 14:30:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 14:30:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:21,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:21,959 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-07-20 14:30:21,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:21,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93472367] [2020-07-20 14:30:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:22,040 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:30:22,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:30:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:22,064 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 14:30:22,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:22,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93472367] [2020-07-20 14:30:22,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:22,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:30:22,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026854073] [2020-07-20 14:30:22,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:30:22,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:30:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:30:22,085 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-20 14:30:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:22,114 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-07-20 14:30:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:30:22,115 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-20 14:30:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:22,125 INFO L225 Difference]: With dead ends: 61 [2020-07-20 14:30:22,125 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 14:30:22,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:30:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 14:30:22,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 14:30:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 14:30:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-07-20 14:30:22,173 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-07-20 14:30:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:22,173 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-07-20 14:30:22,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:30:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-07-20 14:30:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 14:30:22,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:22,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:22,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:22,376 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:22,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-07-20 14:30:22,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:22,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854263814] [2020-07-20 14:30:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:22,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:22,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:30:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:22,452 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:22,478 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 14:30:22,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:22,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854263814] [2020-07-20 14:30:22,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:22,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:30:22,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033530366] [2020-07-20 14:30:22,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:30:22,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:22,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:30:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:30:22,487 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-07-20 14:30:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:22,586 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-20 14:30:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:30:22,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 14:30:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:22,588 INFO L225 Difference]: With dead ends: 35 [2020-07-20 14:30:22,588 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 14:30:22,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:30:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 14:30:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 14:30:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 14:30:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-07-20 14:30:22,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-07-20 14:30:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:22,602 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-07-20 14:30:22,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:30:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-20 14:30:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 14:30:22,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:22,604 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:22,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:22,820 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-07-20 14:30:22,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:22,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362290366] [2020-07-20 14:30:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:22,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:30:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:22,886 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:22,888 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:22,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:22,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362290366] [2020-07-20 14:30:22,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:22,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:30:22,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859612016] [2020-07-20 14:30:22,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:30:22,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:30:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:30:22,919 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-07-20 14:30:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:23,033 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-20 14:30:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:30:23,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 14:30:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:23,035 INFO L225 Difference]: With dead ends: 48 [2020-07-20 14:30:23,035 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 14:30:23,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:30:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 14:30:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-20 14:30:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 14:30:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-20 14:30:23,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-07-20 14:30:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:23,049 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-20 14:30:23,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:30:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-20 14:30:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 14:30:23,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:23,051 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:23,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:23,268 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-07-20 14:30:23,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:23,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546987512] [2020-07-20 14:30:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:23,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:30:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:23,328 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:30:23,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:23,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546987512] [2020-07-20 14:30:23,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:23,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:30:23,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384995155] [2020-07-20 14:30:23,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:30:23,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:23,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:30:23,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:30:23,365 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-07-20 14:30:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:23,439 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-07-20 14:30:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:30:23,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 14:30:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:23,441 INFO L225 Difference]: With dead ends: 55 [2020-07-20 14:30:23,441 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 14:30:23,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:30:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 14:30:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-20 14:30:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 14:30:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-07-20 14:30:23,453 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-07-20 14:30:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:23,453 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-07-20 14:30:23,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:30:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-07-20 14:30:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 14:30:23,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:23,455 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:23,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:23,670 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:23,671 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-07-20 14:30:23,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:23,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134342005] [2020-07-20 14:30:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:23,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:23,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:30:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:23,751 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:23,753 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 14:30:23,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:23,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134342005] [2020-07-20 14:30:23,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:23,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:30:23,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419989018] [2020-07-20 14:30:23,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:30:23,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:30:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:30:23,770 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-07-20 14:30:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:23,921 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-20 14:30:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:30:23,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 14:30:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:23,924 INFO L225 Difference]: With dead ends: 70 [2020-07-20 14:30:23,924 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 14:30:23,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:30:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 14:30:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-20 14:30:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 14:30:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-20 14:30:23,936 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-07-20 14:30:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:23,937 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-20 14:30:23,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:30:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-20 14:30:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:30:23,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:23,938 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:24,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:24,148 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:24,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-07-20 14:30:24,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:24,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002074006] [2020-07-20 14:30:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:24,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:24,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:30:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:24,223 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:24,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 14:30:24,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:24,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002074006] [2020-07-20 14:30:24,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:24,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 14:30:24,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376796778] [2020-07-20 14:30:24,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:30:24,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:24,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:30:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:30:24,253 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-07-20 14:30:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:24,401 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-07-20 14:30:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:30:24,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-20 14:30:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:24,403 INFO L225 Difference]: With dead ends: 72 [2020-07-20 14:30:24,403 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 14:30:24,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:30:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 14:30:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-07-20 14:30:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 14:30:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-20 14:30:24,422 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-07-20 14:30:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:24,422 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-20 14:30:24,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:30:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-20 14:30:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 14:30:24,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:24,425 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:24,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:24,639 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-07-20 14:30:24,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:24,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001396290] [2020-07-20 14:30:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:24,677 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 14:30:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:24,795 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:30:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 14:30:24,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:24,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 14:30:24,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001396290] [2020-07-20 14:30:24,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:24,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-20 14:30:24,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116276428] [2020-07-20 14:30:24,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 14:30:24,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 14:30:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:30:24,948 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 13 states. [2020-07-20 14:30:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:25,414 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-20 14:30:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 14:30:25,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-07-20 14:30:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:25,418 INFO L225 Difference]: With dead ends: 110 [2020-07-20 14:30:25,418 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 14:30:25,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-07-20 14:30:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 14:30:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-20 14:30:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 14:30:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-07-20 14:30:25,434 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56 [2020-07-20 14:30:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:25,434 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-07-20 14:30:25,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 14:30:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-07-20 14:30:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 14:30:25,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:25,436 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:25,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:25,652 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-07-20 14:30:25,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:25,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894825736] [2020-07-20 14:30:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:25,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 14:30:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:25,754 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:25,755 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 14:30:25,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:25,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 14:30:25,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894825736] [2020-07-20 14:30:25,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:25,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 14:30:25,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880542769] [2020-07-20 14:30:25,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:30:25,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:25,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:30:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:30:25,863 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 12 states. [2020-07-20 14:30:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:26,050 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-07-20 14:30:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:30:26,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-07-20 14:30:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:26,056 INFO L225 Difference]: With dead ends: 93 [2020-07-20 14:30:26,056 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 14:30:26,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:30:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 14:30:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-20 14:30:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 14:30:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-20 14:30:26,082 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58 [2020-07-20 14:30:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:26,082 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-20 14:30:26,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:30:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-20 14:30:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 14:30:26,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:26,089 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:26,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:26,303 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:26,304 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-07-20 14:30:26,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:26,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383060074] [2020-07-20 14:30:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:26,349 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 14:30:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:26,453 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:26,456 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 14:30:26,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:26,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 14:30:26,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383060074] [2020-07-20 14:30:26,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:26,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 14:30:26,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14618079] [2020-07-20 14:30:26,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 14:30:26,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 14:30:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:30:26,633 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-07-20 14:30:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:27,053 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-07-20 14:30:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 14:30:27,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-07-20 14:30:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:27,056 INFO L225 Difference]: With dead ends: 112 [2020-07-20 14:30:27,056 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 14:30:27,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2020-07-20 14:30:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 14:30:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-20 14:30:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 14:30:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-07-20 14:30:27,084 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 83 [2020-07-20 14:30:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:27,085 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-07-20 14:30:27,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 14:30:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-07-20 14:30:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 14:30:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:27,093 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:27,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:27,307 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times [2020-07-20 14:30:27,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:27,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745532511] [2020-07-20 14:30:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:27,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:27,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 14:30:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:27,531 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:30:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 14:30:27,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:27,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:27,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:27,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 14:30:27,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745532511] [2020-07-20 14:30:27,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:27,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-07-20 14:30:27,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331333251] [2020-07-20 14:30:27,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 14:30:27,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:27,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 14:30:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-07-20 14:30:27,838 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 21 states. [2020-07-20 14:30:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:28,823 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-07-20 14:30:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 14:30:28,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-07-20 14:30:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:28,826 INFO L225 Difference]: With dead ends: 171 [2020-07-20 14:30:28,826 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 14:30:28,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 14:30:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 14:30:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-07-20 14:30:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-20 14:30:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2020-07-20 14:30:28,844 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 106 [2020-07-20 14:30:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:28,844 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2020-07-20 14:30:28,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 14:30:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2020-07-20 14:30:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 14:30:28,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:28,846 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:29,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:29,072 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-07-20 14:30:29,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:29,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284984863] [2020-07-20 14:30:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:29,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:29,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 14:30:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:29,263 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:29,264 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 14:30:29,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:29,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:29,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:29,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:29,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:29,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 14:30:29,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284984863] [2020-07-20 14:30:29,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:29,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 14:30:29,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730417863] [2020-07-20 14:30:29,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 14:30:29,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 14:30:29,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-07-20 14:30:29,569 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 23 states. [2020-07-20 14:30:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:30,228 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-07-20 14:30:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 14:30:30,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-07-20 14:30:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:30,230 INFO L225 Difference]: With dead ends: 154 [2020-07-20 14:30:30,230 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 14:30:30,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 14:30:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 14:30:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-07-20 14:30:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 14:30:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-07-20 14:30:30,251 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 108 [2020-07-20 14:30:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:30,254 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-07-20 14:30:30,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 14:30:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-07-20 14:30:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-20 14:30:30,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:30,257 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:30,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:30,470 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 335068695, now seen corresponding path program 4 times [2020-07-20 14:30:30,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:30,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378483115] [2020-07-20 14:30:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:30,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:30,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 14:30:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:30,885 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:30,886 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 14:30:30,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:31,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:31,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:31,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:31,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:31,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:31,297 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 14:30:31,301 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 14:30:31,373 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 14:30:31,375 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 14:30:31,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:31,379 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 14:30:31,380 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 14:30:31,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:31,422 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 14:30:31,423 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 14:30:31,423 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 14:30:31,431 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 14:30:31,432 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 14:30:31,432 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 14:30:31,514 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 14:30:31,514 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 14:30:31,515 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 14:30:31,519 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 14:30:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 14:30:31,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378483115] [2020-07-20 14:30:31,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:31,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2020-07-20 14:30:31,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852023699] [2020-07-20 14:30:31,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 14:30:31,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:31,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 14:30:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 14:30:31,642 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 35 states. [2020-07-20 14:30:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:33,978 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2020-07-20 14:30:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 14:30:33,978 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 158 [2020-07-20 14:30:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:33,980 INFO L225 Difference]: With dead ends: 202 [2020-07-20 14:30:33,981 INFO L226 Difference]: Without dead ends: 200 [2020-07-20 14:30:33,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3181, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 14:30:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-20 14:30:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2020-07-20 14:30:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-20 14:30:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2020-07-20 14:30:34,008 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 158 [2020-07-20 14:30:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:34,009 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2020-07-20 14:30:34,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 14:30:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2020-07-20 14:30:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-20 14:30:34,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:34,014 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:34,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:34,227 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash 254282874, now seen corresponding path program 3 times [2020-07-20 14:30:34,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:34,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664465362] [2020-07-20 14:30:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:34,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:34,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 14:30:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:34,640 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:30:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 14:30:34,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:34,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:34,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:34,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:35,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:35,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:35,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 14:30:35,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664465362] [2020-07-20 14:30:35,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:35,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-07-20 14:30:35,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932936379] [2020-07-20 14:30:35,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 14:30:35,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 14:30:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 14:30:35,502 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand 37 states. [2020-07-20 14:30:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:37,440 INFO L93 Difference]: Finished difference Result 275 states and 376 transitions. [2020-07-20 14:30:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 14:30:37,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 206 [2020-07-20 14:30:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:37,444 INFO L225 Difference]: With dead ends: 275 [2020-07-20 14:30:37,444 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 14:30:37,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 373 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1051, Invalid=2371, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 14:30:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 14:30:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2020-07-20 14:30:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-20 14:30:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 290 transitions. [2020-07-20 14:30:37,466 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 290 transitions. Word has length 206 [2020-07-20 14:30:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:37,467 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 290 transitions. [2020-07-20 14:30:37,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 14:30:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 290 transitions. [2020-07-20 14:30:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-20 14:30:37,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:37,471 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:37,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:37,684 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1789545513, now seen corresponding path program 5 times [2020-07-20 14:30:37,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:37,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493925613] [2020-07-20 14:30:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:37,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:37,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:37,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 14:30:37,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:40,322 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:40,323 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:30:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-20 14:30:40,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:40,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:40,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:40,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:40,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:40,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:41,044 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 14:30:41,044 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 14:30:41,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:41,048 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 14:30:41,180 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 14:30:41,180 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 14:30:41,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:41,184 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 14:30:41,185 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 14:30:41,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:41,265 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 14:30:41,266 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 14:30:41,266 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 14:30:41,271 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 14:30:41,272 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 14:30:41,272 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 14:30:41,407 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 14:30:41,414 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 14:30:41,483 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-20 14:30:41,487 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 14:30:41,487 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 14:30:41,488 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 14:30:41,638 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 14:30:41,639 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 14:30:41,639 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 14:30:41,648 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 14:30:41,648 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 14:30:41,648 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 14:30:41,730 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 14:30:41,731 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 6, 1] term [2020-07-20 14:30:41,731 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 6 conjuncts [2020-07-20 14:30:41,737 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 14:30:41,907 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 14:30:41,914 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 14:30:42,012 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 14:30:42,018 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 14:30:42,207 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 14:30:42,213 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 14:30:42,214 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[8, 7, 1] term [2020-07-20 14:30:42,214 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 7 conjuncts [2020-07-20 14:30:42,318 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 14:30:42,319 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 14:30:42,320 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 14:30:42,325 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 14:30:42,326 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 14:30:42,326 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 14:30:42,512 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 14:30:42,513 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 14:30:42,514 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 14:30:42,526 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 14:30:42,527 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 14:30:42,527 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 14:30:42,636 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 14:30:42,641 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 14:30:42,859 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 14:30:42,871 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 14:30:43,007 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 14:30:43,016 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 14:30:43,245 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 14:30:43,250 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-20 14:30:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-20 14:30:43,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493925613] [2020-07-20 14:30:43,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:43,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 67 [2020-07-20 14:30:43,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420903116] [2020-07-20 14:30:43,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 14:30:43,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:43,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 14:30:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3521, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 14:30:43,648 INFO L87 Difference]: Start difference. First operand 231 states and 290 transitions. Second operand 67 states. [2020-07-20 14:30:47,461 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-07-20 14:30:47,734 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 14:30:47,960 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 14:30:48,201 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 14:30:48,448 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 14:30:48,676 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 14:30:49,159 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 14:30:51,337 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 14:30:53,637 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 14:30:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:53,810 INFO L93 Difference]: Finished difference Result 302 states and 398 transitions. [2020-07-20 14:30:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-20 14:30:53,811 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2020-07-20 14:30:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:53,814 INFO L225 Difference]: With dead ends: 302 [2020-07-20 14:30:53,814 INFO L226 Difference]: Without dead ends: 300 [2020-07-20 14:30:53,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 447 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3232, Invalid=12770, Unknown=0, NotChecked=0, Total=16002 [2020-07-20 14:30:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-07-20 14:30:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-07-20 14:30:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-20 14:30:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 347 transitions. [2020-07-20 14:30:53,843 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 347 transitions. Word has length 258 [2020-07-20 14:30:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:53,844 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 347 transitions. [2020-07-20 14:30:53,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 14:30:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 347 transitions. [2020-07-20 14:30:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 14:30:53,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:53,852 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:54,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:54,066 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1039722502, now seen corresponding path program 4 times [2020-07-20 14:30:54,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:54,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839631253] [2020-07-20 14:30:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:54,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:54,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:54,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 14:30:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:55,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:30:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-20 14:30:55,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:55,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:55,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:55,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:55,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:56,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:56,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:57,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:57,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:57,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:30:57,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:57,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:30:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-20 14:30:57,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839631253] [2020-07-20 14:30:57,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:57,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 69 [2020-07-20 14:30:57,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880169552] [2020-07-20 14:30:57,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 14:30:57,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 14:30:57,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=3064, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 14:30:57,974 INFO L87 Difference]: Start difference. First operand 270 states and 347 transitions. Second operand 69 states. [2020-07-20 14:31:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:31:02,584 INFO L93 Difference]: Finished difference Result 455 states and 649 transitions. [2020-07-20 14:31:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 14:31:02,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 406 [2020-07-20 14:31:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:31:02,588 INFO L225 Difference]: With dead ends: 455 [2020-07-20 14:31:02,588 INFO L226 Difference]: Without dead ends: 395 [2020-07-20 14:31:02,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 741 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3587, Invalid=7755, Unknown=0, NotChecked=0, Total=11342 [2020-07-20 14:31:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-20 14:31:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2020-07-20 14:31:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-07-20 14:31:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 507 transitions. [2020-07-20 14:31:02,626 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 507 transitions. Word has length 406 [2020-07-20 14:31:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:31:02,627 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 507 transitions. [2020-07-20 14:31:02,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 14:31:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 507 transitions. [2020-07-20 14:31:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 14:31:02,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:31:02,632 INFO L422 BasicCegarLoop]: trace histogram [80, 79, 79, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:31:02,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:31:02,840 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:31:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:31:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1959696841, now seen corresponding path program 6 times [2020-07-20 14:31:02,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:31:02,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956901462] [2020-07-20 14:31:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:31:02,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:31:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:31:02,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 88 conjunts are in the unsatisfiable core [2020-07-20 14:31:03,006 INFO L286 TraceCheckSpWp]: Computing forward predicates...