/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 BIGGEST_EQUIVALENCE_CLASS --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/recursive-simple/fibo_2calls_10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:45:26,807 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:45:26,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:45:26,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:45:26,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:45:26,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:45:26,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:45:26,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:45:26,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:45:26,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:45:26,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:45:26,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:45:26,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:45:26,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:45:26,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:45:26,863 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 [2020-07-21 00:45:26,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:45:26,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:45:26,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:45:26,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:45:26,883 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:45:26,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:45:26,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:45:26,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:45:26,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:45:26,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:45:26,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:45:26,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:45:26,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:45:26,885 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:45:26,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:45:26,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:45:26,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:45:26,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:45:26,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:45:26,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:45:26,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:45:26,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:45:26,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:45:26,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:45:26,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:45:26,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:45:26,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:26,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:45:26,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:45:26,889 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 00:45:27,269 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:45:27,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:45:27,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:45:27,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:45:27,303 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:45:27,304 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-1.c [2020-07-21 00:45:27,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420a4da28/5ed7b777d70a4e98a9632aba8f9ea1a1/FLAGe8589d540 [2020-07-21 00:45:27,927 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:45:27,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-1.c [2020-07-21 00:45:27,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420a4da28/5ed7b777d70a4e98a9632aba8f9ea1a1/FLAGe8589d540 [2020-07-21 00:45:28,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420a4da28/5ed7b777d70a4e98a9632aba8f9ea1a1 [2020-07-21 00:45:28,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:45:28,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:45:28,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:45:28,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:45:28,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:45:28,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4487fdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28, skipping insertion in model container [2020-07-21 00:45:28,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:45:28,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:45:28,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:45:28,532 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:45:28,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:45:28,570 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:45:28,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28 WrapperNode [2020-07-21 00:45:28,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:45:28,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:45:28,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:45:28,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:45:28,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (1/1) ... [2020-07-21 00:45:28,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:45:28,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:45:28,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:45:28,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:45:28,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (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 [2020-07-21 00:45:28,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:45:28,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:45:28,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 00:45:28,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 00:45:28,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:45:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:45:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:45:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 00:45:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 00:45:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:45:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:45:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:45:29,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:45:29,051 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:45:29,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:45:29 BoogieIcfgContainer [2020-07-21 00:45:29,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:45:29,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:45:29,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:45:29,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:45:29,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:45:28" (1/3) ... [2020-07-21 00:45:29,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22765616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:45:29, skipping insertion in model container [2020-07-21 00:45:29,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:28" (2/3) ... [2020-07-21 00:45:29,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22765616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:45:29, skipping insertion in model container [2020-07-21 00:45:29,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:45:29" (3/3) ... [2020-07-21 00:45:29,071 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-1.c [2020-07-21 00:45:29,089 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:45:29,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:45:29,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:45:29,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:45:29,194 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:45:29,195 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:45:29,195 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:45:29,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:45:29,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:45:29,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:45:29,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:45:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 00:45:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:45:29,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:29,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:29,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:29,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 00:45:29,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:29,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847940173] [2020-07-21 00:45:29,267 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 [2020-07-21 00:45:29,343 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:29,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:45:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:45:29,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:45:29,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847940173] [2020-07-21 00:45:29,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:45:29,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:45:29,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706510377] [2020-07-21 00:45:29,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:45:29,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:45:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:45:29,477 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 00:45:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:29,612 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 00:45:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:45:29,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:45:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:29,628 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:45:29,628 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:45:29,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:45:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:45:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:45:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:45:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:45:29,690 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 00:45:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:29,691 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:45:29,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:45:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:45:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:45:29,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:29,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:29,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:29,909 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:29,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 00:45:29,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:29,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999980179] [2020-07-21 00:45:29,912 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 [2020-07-21 00:45:29,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:45:29,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:29,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:45:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:45:30,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:45:30,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999980179] [2020-07-21 00:45:30,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:45:30,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:45:30,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049605970] [2020-07-21 00:45:30,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:45:30,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:45:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:45:30,013 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 00:45:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:30,121 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:45:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:45:30,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:45:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:30,125 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:45:30,125 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 00:45:30,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:45:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 00:45:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 00:45:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:45:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:45:30,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 00:45:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:30,138 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:45:30,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:45:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:45:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:45:30,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:30,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:30,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:30,345 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 00:45:30,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:30,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805452991] [2020-07-21 00:45:30,348 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 [2020-07-21 00:45:30,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:30,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:30,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:45:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:45:30,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:30,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:30,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:45:30,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805452991] [2020-07-21 00:45:30,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:30,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:45:30,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028718656] [2020-07-21 00:45:30,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:45:30,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:45:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:45:30,831 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 00:45:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:30,989 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 00:45:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:45:30,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 00:45:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:30,992 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:45:30,992 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:45:30,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:45:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:45:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 00:45:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:45:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:45:31,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 00:45:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:31,005 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:45:31,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:45:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:45:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:45:31,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:31,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:31,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:31,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 00:45:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:31,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414921353] [2020-07-21 00:45:31,227 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 [2020-07-21 00:45:31,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:45:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:45:31,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:31,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:31,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:45:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414921353] [2020-07-21 00:45:31,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:31,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:45:31,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688654692] [2020-07-21 00:45:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:45:31,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:45:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:45:31,618 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 00:45:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:31,804 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 00:45:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:45:31,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 00:45:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:31,808 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:45:31,808 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:45:31,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:45:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:45:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 00:45:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:45:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:45:31,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 00:45:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:31,820 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:45:31,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:45:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:45:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:45:31,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:31,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2020-07-21 00:45:32,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:32,039 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 00:45:32,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:32,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363065018] [2020-07-21 00:45:32,042 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 [2020-07-21 00:45:32,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:45:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:45:32,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:32,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:32,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:32,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:45:32,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363065018] [2020-07-21 00:45:32,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:32,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:45:32,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283130009] [2020-07-21 00:45:32,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:45:32,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:45:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:45:32,638 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 00:45:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:32,851 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 00:45:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:45:32,851 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 00:45:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:32,854 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:45:32,854 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 00:45:32,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:45:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 00:45:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 00:45:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:45:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:45:32,875 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 00:45:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:32,876 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:45:32,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:45:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:45:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:45:32,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:32,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2020-07-21 00:45:33,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:33,081 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 00:45:33,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:33,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968338839] [2020-07-21 00:45:33,083 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 [2020-07-21 00:45:33,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:33,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:45:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:45:33,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:33,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:33,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:33,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:45:33,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968338839] [2020-07-21 00:45:33,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:33,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:45:33,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805538] [2020-07-21 00:45:33,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:45:33,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:33,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:45:33,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:45:33,536 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 00:45:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:33,717 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 00:45:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:45:33,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 00:45:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:33,724 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:45:33,728 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 00:45:33,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:45:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 00:45:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 00:45:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:45:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:45:33,760 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 00:45:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:33,761 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:45:33,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:45:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:45:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:45:33,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:33,769 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:33,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:33,970 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 00:45:33,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:33,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197830451] [2020-07-21 00:45:33,972 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 [2020-07-21 00:45:34,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:34,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:34,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:45:34,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 00:45:34,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:34,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:34,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:34,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:34,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:45:34,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197830451] [2020-07-21 00:45:34,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:34,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:45:34,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47209480] [2020-07-21 00:45:34,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:45:34,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:45:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:45:34,704 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 00:45:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:34,906 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 00:45:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:45:34,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 00:45:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:34,909 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:45:34,909 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:45:34,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:45:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:45:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 00:45:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:45:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:45:34,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 00:45:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:34,921 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:45:34,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:45:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:45:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:45:34,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:34,923 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:35,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:35,129 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 00:45:35,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:35,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492189150] [2020-07-21 00:45:35,132 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 [2020-07-21 00:45:35,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:45:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 00:45:35,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:35,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:35,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:35,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:35,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:35,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:45:35,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492189150] [2020-07-21 00:45:35,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:35,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:45:35,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994024472] [2020-07-21 00:45:35,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:45:35,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:45:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:45:35,816 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 00:45:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:36,018 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 00:45:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:45:36,019 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 00:45:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:36,022 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:45:36,022 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:45:36,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:45:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:45:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 00:45:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:45:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:45:36,034 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 00:45:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:36,034 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:45:36,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:45:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:45:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 00:45:36,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:36,037 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:36,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:36,253 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 00:45:36,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:36,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56599434] [2020-07-21 00:45:36,255 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 [2020-07-21 00:45:36,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:36,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:45:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 00:45:36,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:37,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 00:45:37,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56599434] [2020-07-21 00:45:37,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:37,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:45:37,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769117064] [2020-07-21 00:45:37,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:45:37,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:45:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:45:37,388 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 00:45:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:37,647 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 00:45:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:45:37,648 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 00:45:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:37,651 INFO L225 Difference]: With dead ends: 71 [2020-07-21 00:45:37,651 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 00:45:37,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:45:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 00:45:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 00:45:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:45:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:45:37,663 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 00:45:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:37,664 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:45:37,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:45:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:45:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:45:37,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:37,666 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:37,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:37,880 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 00:45:37,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:37,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236827538] [2020-07-21 00:45:37,882 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 [2020-07-21 00:45:37,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:37,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:37,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:45:37,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 00:45:38,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:38,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:38,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:38,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:38,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 00:45:38,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236827538] [2020-07-21 00:45:38,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:38,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:45:38,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10674494] [2020-07-21 00:45:38,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:45:38,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:38,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:45:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:45:38,950 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 00:45:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:39,189 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 00:45:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:45:39,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 00:45:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:39,192 INFO L225 Difference]: With dead ends: 76 [2020-07-21 00:45:39,193 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:45:39,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:45:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:45:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 00:45:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:45:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:45:39,220 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 00:45:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:39,221 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:45:39,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:45:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:45:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 00:45:39,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:39,224 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:39,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:39,439 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 00:45:39,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:39,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155588007] [2020-07-21 00:45:39,442 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 [2020-07-21 00:45:39,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:39,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:39,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:45:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 00:45:39,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:40,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 00:45:41,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155588007] [2020-07-21 00:45:41,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:41,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 00:45:41,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664812506] [2020-07-21 00:45:41,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:45:41,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:45:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:45:41,437 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 00:45:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:41,695 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 00:45:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:45:41,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 00:45:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:41,699 INFO L225 Difference]: With dead ends: 81 [2020-07-21 00:45:41,699 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 00:45:41,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:45:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 00:45:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 00:45:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:45:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:45:41,711 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 00:45:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:41,712 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:45:41,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:45:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:45:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:45:41,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:41,714 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:41,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:41,926 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 00:45:41,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:41,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93116199] [2020-07-21 00:45:41,928 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 [2020-07-21 00:45:41,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:41,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:45:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 00:45:42,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:42,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 00:45:43,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93116199] [2020-07-21 00:45:43,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:43,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 00:45:43,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223284891] [2020-07-21 00:45:43,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:45:43,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:43,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:45:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:45:43,469 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 00:45:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:43,769 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 00:45:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:45:43,770 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 00:45:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:43,772 INFO L225 Difference]: With dead ends: 86 [2020-07-21 00:45:43,772 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 00:45:43,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:45:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 00:45:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 00:45:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:45:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:45:43,784 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 00:45:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:43,784 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:45:43,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:45:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:45:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 00:45:43,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:43,787 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:44,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:44,002 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 00:45:44,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:44,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213014800] [2020-07-21 00:45:44,004 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 [2020-07-21 00:45:44,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:44,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:44,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:45:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 00:45:44,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:45,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:45,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 00:45:46,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213014800] [2020-07-21 00:45:46,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:46,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 00:45:46,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008253293] [2020-07-21 00:45:46,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:45:46,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:46,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:45:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:45:46,616 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 00:45:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:47,033 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 00:45:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:45:47,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 00:45:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:47,036 INFO L225 Difference]: With dead ends: 91 [2020-07-21 00:45:47,037 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 00:45:47,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:45:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 00:45:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 00:45:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:45:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 00:45:47,050 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 00:45:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:47,050 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 00:45:47,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:45:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 00:45:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 00:45:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:47,054 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:47,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:47,268 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 00:45:47,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:47,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625398789] [2020-07-21 00:45:47,270 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 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 [2020-07-21 00:45:47,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:47,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:45:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 00:45:47,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:48,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 00:45:49,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625398789] [2020-07-21 00:45:49,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:49,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 00:45:49,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476303818] [2020-07-21 00:45:49,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:45:49,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:45:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:45:49,948 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 00:45:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:50,328 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 00:45:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:45:50,329 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 00:45:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:50,334 INFO L225 Difference]: With dead ends: 96 [2020-07-21 00:45:50,334 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 00:45:50,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:45:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 00:45:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 00:45:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:45:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 00:45:50,352 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 00:45:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:50,353 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 00:45:50,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:45:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 00:45:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 00:45:50,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:50,363 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:50,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:50,567 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:50,568 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 00:45:50,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:50,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650584100] [2020-07-21 00:45:50,569 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 [2020-07-21 00:45:50,706 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:50,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:50,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:45:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 00:45:50,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:52,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:53,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:53,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:53,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 00:45:54,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650584100] [2020-07-21 00:45:54,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:54,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 00:45:54,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507708324] [2020-07-21 00:45:54,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:45:54,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:54,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:45:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:45:54,761 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 00:45:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:55,261 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 00:45:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:45:55,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 00:45:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:55,269 INFO L225 Difference]: With dead ends: 101 [2020-07-21 00:45:55,269 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 00:45:55,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:45:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 00:45:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 00:45:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:45:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 00:45:55,297 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 00:45:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:55,301 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 00:45:55,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:45:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 00:45:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 00:45:55,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:55,306 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:55,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:55,520 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 00:45:55,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:55,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712740443] [2020-07-21 00:45:55,522 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 [2020-07-21 00:45:55,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:55,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:45:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 00:45:55,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:58,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:58,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:58,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 00:45:59,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712740443] [2020-07-21 00:45:59,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:59,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 00:45:59,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736059740] [2020-07-21 00:45:59,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:45:59,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:45:59,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:45:59,834 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 00:46:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:00,325 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 00:46:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:46:00,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 00:46:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:00,331 INFO L225 Difference]: With dead ends: 106 [2020-07-21 00:46:00,331 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 00:46:00,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:46:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 00:46:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 00:46:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:46:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 00:46:00,352 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 00:46:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:00,354 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 00:46:00,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:46:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 00:46:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 00:46:00,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:00,364 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:00,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:00,580 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 00:46:00,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:00,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54531359] [2020-07-21 00:46:00,582 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:00,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:00,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 00:46:01,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:05,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:06,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:07,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:07,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:07,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:07,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 00:46:08,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54531359] [2020-07-21 00:46:08,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:08,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 00:46:08,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386594641] [2020-07-21 00:46:08,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:46:08,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:08,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:46:08,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:46:08,824 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 00:46:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:09,416 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 00:46:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:09,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 00:46:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:09,421 INFO L225 Difference]: With dead ends: 111 [2020-07-21 00:46:09,421 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 00:46:09,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:46:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 00:46:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 00:46:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:46:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 00:46:09,433 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 00:46:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:09,434 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 00:46:09,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:46:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 00:46:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 00:46:09,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:09,438 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:09,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:09,652 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:09,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 00:46:09,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:09,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399979757] [2020-07-21 00:46:09,654 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:09,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:09,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 00:46:10,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:12,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:13,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:13,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:14,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:14,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 00:46:15,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399979757] [2020-07-21 00:46:15,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:15,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:46:15,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443663291] [2020-07-21 00:46:15,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:46:15,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:46:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:46:15,671 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 23 states. [2020-07-21 00:46:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:16,233 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 00:46:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:16,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 418 [2020-07-21 00:46:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:16,239 INFO L225 Difference]: With dead ends: 116 [2020-07-21 00:46:16,239 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 00:46:16,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:46:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 00:46:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 00:46:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:46:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 00:46:16,254 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 00:46:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:16,255 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 00:46:16,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:46:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 00:46:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 00:46:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:16,263 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 42, 41, 41, 31, 31, 31, 31, 31, 31, 31, 31, 20, 20, 20, 20, 20, 20, 20, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:16,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:16,478 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1777656900, now seen corresponding path program 8 times [2020-07-21 00:46:16,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:16,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691110232] [2020-07-21 00:46:16,480 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:16,810 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:16,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:46:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2104 refuted. 0 times theorem prover too weak. 11666 trivial. 0 not checked. [2020-07-21 00:46:17,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:21,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:21,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:22,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:22,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:23,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:24,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:24,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2156 refuted. 0 times theorem prover too weak. 11614 trivial. 0 not checked. [2020-07-21 00:46:25,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691110232] [2020-07-21 00:46:25,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:25,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:46:25,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446493162] [2020-07-21 00:46:25,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:46:25,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:46:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:46:25,898 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 25 states. [2020-07-21 00:46:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:26,527 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 00:46:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:46:26,528 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 676 [2020-07-21 00:46:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:26,532 INFO L225 Difference]: With dead ends: 121 [2020-07-21 00:46:26,532 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 00:46:26,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1309 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:46:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 00:46:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 00:46:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 00:46:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 00:46:26,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 676 [2020-07-21 00:46:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:26,547 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 00:46:26,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:46:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 00:46:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2020-07-21 00:46:26,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:26,557 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 49, 47, 47, 32, 32, 32, 32, 32, 32, 32, 32, 26, 23, 23, 23, 23, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:26,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:26,770 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:26,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1813836186, now seen corresponding path program 4 times [2020-07-21 00:46:26,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:26,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780230189] [2020-07-21 00:46:26,771 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:27,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2048 refuted. 0 times theorem prover too weak. 14594 trivial. 0 not checked. [2020-07-21 00:46:27,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:31,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:31,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:32,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:33,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:33,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2088 refuted. 0 times theorem prover too weak. 14554 trivial. 0 not checked. [2020-07-21 00:46:35,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780230189] [2020-07-21 00:46:35,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:35,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:46:35,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173965069] [2020-07-21 00:46:35,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:46:35,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:46:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:46:35,229 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 23 states. [2020-07-21 00:46:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:35,832 INFO L93 Difference]: Finished difference Result 159 states and 539 transitions. [2020-07-21 00:46:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:35,833 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 754 [2020-07-21 00:46:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:35,840 INFO L225 Difference]: With dead ends: 159 [2020-07-21 00:46:35,840 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 00:46:35,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1468 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:46:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 00:46:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2020-07-21 00:46:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 00:46:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2020-07-21 00:46:35,859 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 754 [2020-07-21 00:46:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:35,859 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2020-07-21 00:46:35,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:46:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2020-07-21 00:46:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-07-21 00:46:35,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:35,867 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 47, 45, 45, 45, 33, 33, 33, 33, 33, 33, 33, 25, 22, 22, 22, 22, 22, 22, 22, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:36,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:36,082 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash 848822556, now seen corresponding path program 1 times [2020-07-21 00:46:36,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:36,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756049121] [2020-07-21 00:46:36,084 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:36,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:36,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:46:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1891 refuted. 0 times theorem prover too weak. 15332 trivial. 0 not checked. [2020-07-21 00:46:36,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:40,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:40,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:41,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:41,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:41,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1924 refuted. 0 times theorem prover too weak. 15299 trivial. 0 not checked. [2020-07-21 00:46:43,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756049121] [2020-07-21 00:46:43,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:43,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:46:43,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462153419] [2020-07-21 00:46:43,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:46:43,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:46:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:46:43,222 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand 21 states. [2020-07-21 00:46:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:43,723 INFO L93 Difference]: Finished difference Result 179 states and 673 transitions. [2020-07-21 00:46:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:46:43,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 765 [2020-07-21 00:46:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:43,730 INFO L225 Difference]: With dead ends: 179 [2020-07-21 00:46:43,731 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 00:46:43,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1494 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:46:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 00:46:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2020-07-21 00:46:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 00:46:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2020-07-21 00:46:43,754 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 765 [2020-07-21 00:46:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:43,755 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2020-07-21 00:46:43,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:46:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2020-07-21 00:46:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1080 [2020-07-21 00:46:43,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:43,768 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 77, 77, 61, 57, 41, 41, 41, 41, 41, 41, 41, 38, 38, 38, 38, 38, 38, 38, 25, 20, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:43,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:43,984 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash 67032718, now seen corresponding path program 1 times [2020-07-21 00:46:43,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:43,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120817273] [2020-07-21 00:46:43,986 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:44,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:44,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34506 backedges. 604 proven. 3056 refuted. 0 times theorem prover too weak. 30846 trivial. 0 not checked. [2020-07-21 00:46:45,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:49,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:51,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:51,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34506 backedges. 604 proven. 3096 refuted. 0 times theorem prover too weak. 30806 trivial. 0 not checked. [2020-07-21 00:46:55,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120817273] [2020-07-21 00:46:55,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:55,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:46:55,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833078960] [2020-07-21 00:46:55,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:46:55,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:46:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:46:55,162 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand 23 states. [2020-07-21 00:46:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:55,809 INFO L93 Difference]: Finished difference Result 156 states and 522 transitions. [2020-07-21 00:46:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:55,813 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1079 [2020-07-21 00:46:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:55,817 INFO L225 Difference]: With dead ends: 156 [2020-07-21 00:46:55,817 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 00:46:55,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2166 GetRequests, 2117 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:46:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 00:46:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-07-21 00:46:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 00:46:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2020-07-21 00:46:55,837 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 1079 [2020-07-21 00:46:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:55,838 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2020-07-21 00:46:55,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:46:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2020-07-21 00:46:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-07-21 00:46:55,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:55,850 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 70, 70, 62, 53, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 27, 17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:56,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:56,063 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:56,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1973171480, now seen corresponding path program 2 times [2020-07-21 00:46:56,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:56,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784802876] [2020-07-21 00:46:56,065 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:56,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:56,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:56,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:46:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 28341 backedges. 583 proven. 2408 refuted. 0 times theorem prover too weak. 25350 trivial. 0 not checked. [2020-07-21 00:46:57,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:01,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:01,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:02,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:02,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:03,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:03,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 28341 backedges. 583 proven. 2441 refuted. 0 times theorem prover too weak. 25317 trivial. 0 not checked. [2020-07-21 00:47:05,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784802876] [2020-07-21 00:47:05,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:05,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:47:05,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110280393] [2020-07-21 00:47:05,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:47:05,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:47:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:47:05,239 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand 21 states. [2020-07-21 00:47:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:05,793 INFO L93 Difference]: Finished difference Result 174 states and 639 transitions. [2020-07-21 00:47:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:47:05,795 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 980 [2020-07-21 00:47:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:05,800 INFO L225 Difference]: With dead ends: 174 [2020-07-21 00:47:05,800 INFO L226 Difference]: Without dead ends: 170 [2020-07-21 00:47:05,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1923 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:47:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-21 00:47:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 89. [2020-07-21 00:47:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-21 00:47:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 197 transitions. [2020-07-21 00:47:05,823 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 197 transitions. Word has length 980 [2020-07-21 00:47:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:05,824 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 197 transitions. [2020-07-21 00:47:05,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:47:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 197 transitions. [2020-07-21 00:47:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2020-07-21 00:47:05,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:05,840 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 79, 79, 65, 60, 44, 44, 44, 44, 44, 44, 44, 39, 39, 39, 39, 39, 39, 39, 28, 21, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:06,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:06,054 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash -191683652, now seen corresponding path program 3 times [2020-07-21 00:47:06,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:06,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878618355] [2020-07-21 00:47:06,056 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:06,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:47:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38234 backedges. 764 proven. 3598 refuted. 0 times theorem prover too weak. 33872 trivial. 0 not checked. [2020-07-21 00:47:07,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:12,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:14,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:18,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:19,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:19,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:19,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38234 backedges. 770 proven. 3644 refuted. 0 times theorem prover too weak. 33820 trivial. 0 not checked. [2020-07-21 00:47:20,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878618355] [2020-07-21 00:47:20,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:20,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:47:20,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700429007] [2020-07-21 00:47:20,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:47:20,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:47:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:47:20,918 INFO L87 Difference]: Start difference. First operand 89 states and 197 transitions. Second operand 25 states. [2020-07-21 00:47:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:22,011 INFO L93 Difference]: Finished difference Result 263 states and 1331 transitions. [2020-07-21 00:47:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:47:22,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1134 [2020-07-21 00:47:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:22,018 INFO L225 Difference]: With dead ends: 263 [2020-07-21 00:47:22,018 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 00:47:22,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2277 GetRequests, 2223 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:47:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 00:47:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-07-21 00:47:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 00:47:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 326 transitions. [2020-07-21 00:47:22,051 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 326 transitions. Word has length 1134 [2020-07-21 00:47:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:22,052 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 326 transitions. [2020-07-21 00:47:22,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:47:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 326 transitions. [2020-07-21 00:47:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2020-07-21 00:47:22,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:22,066 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 63, 63, 58, 53, 42, 42, 42, 42, 42, 42, 42, 31, 31, 31, 31, 31, 31, 31, 31, 22, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:22,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:22,281 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:22,282 INFO L82 PathProgramCache]: Analyzing trace with hash 873446842, now seen corresponding path program 4 times [2020-07-21 00:47:22,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:22,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087648530] [2020-07-21 00:47:22,283 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:22,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:47:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30091 backedges. 639 proven. 3185 refuted. 0 times theorem prover too weak. 26267 trivial. 0 not checked. [2020-07-21 00:47:23,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:30,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:30,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:32,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:32,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:34,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:35,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:35,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:35,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:35,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:36,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30091 backedges. 643 proven. 3233 refuted. 0 times theorem prover too weak. 26215 trivial. 0 not checked. [2020-07-21 00:47:37,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087648530] [2020-07-21 00:47:37,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:37,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:47:37,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219272984] [2020-07-21 00:47:37,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:47:37,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:47:37,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:47:37,206 INFO L87 Difference]: Start difference. First operand 142 states and 326 transitions. Second operand 25 states. [2020-07-21 00:47:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:38,441 INFO L93 Difference]: Finished difference Result 385 states and 1941 transitions. [2020-07-21 00:47:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:47:38,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1000 [2020-07-21 00:47:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:38,453 INFO L225 Difference]: With dead ends: 385 [2020-07-21 00:47:38,453 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:47:38,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2009 GetRequests, 1955 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:47:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:47:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2020-07-21 00:47:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 00:47:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 346 transitions. [2020-07-21 00:47:38,504 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 346 transitions. Word has length 1000 [2020-07-21 00:47:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:38,505 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 346 transitions. [2020-07-21 00:47:38,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:47:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 346 transitions. [2020-07-21 00:47:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1218 [2020-07-21 00:47:38,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:38,534 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 86, 86, 72, 64, 46, 46, 46, 46, 46, 46, 46, 43, 43, 43, 43, 43, 43, 43, 29, 22, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:38,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:38,748 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash 21011846, now seen corresponding path program 5 times [2020-07-21 00:47:38,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:38,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035620510] [2020-07-21 00:47:38,750 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:39,343 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:47:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44056 backedges. 574 proven. 3606 refuted. 0 times theorem prover too weak. 39876 trivial. 0 not checked. [2020-07-21 00:47:40,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:48,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:50,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:50,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:52,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:54,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:54,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:54,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:54,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44056 backedges. 576 proven. 3644 refuted. 0 times theorem prover too weak. 39836 trivial. 0 not checked. [2020-07-21 00:47:55,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035620510] [2020-07-21 00:47:55,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:55,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:47:55,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98269066] [2020-07-21 00:47:55,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:47:55,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:47:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:47:55,347 INFO L87 Difference]: Start difference. First operand 147 states and 346 transitions. Second operand 23 states. [2020-07-21 00:47:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:56,355 INFO L93 Difference]: Finished difference Result 263 states and 940 transitions. [2020-07-21 00:47:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:47:56,357 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1217 [2020-07-21 00:47:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:56,367 INFO L225 Difference]: With dead ends: 263 [2020-07-21 00:47:56,368 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 00:47:56,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2442 GetRequests, 2393 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:47:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 00:47:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 150. [2020-07-21 00:47:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 00:47:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 00:47:56,408 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 1217 [2020-07-21 00:47:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:56,409 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 00:47:56,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:47:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 00:47:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1083 [2020-07-21 00:47:56,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:56,429 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 75, 75, 63, 58, 42, 42, 42, 42, 42, 42, 42, 37, 37, 37, 37, 37, 37, 37, 26, 21, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:56,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:56,631 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1339920950, now seen corresponding path program 6 times [2020-07-21 00:47:56,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:56,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822046474] [2020-07-21 00:47:56,633 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:57,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:57,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:47:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34758 backedges. 556 proven. 2724 refuted. 0 times theorem prover too weak. 31478 trivial. 0 not checked. [2020-07-21 00:47:57,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:04,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:07,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:07,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:09,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:09,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:10,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34758 backedges. 556 proven. 2754 refuted. 0 times theorem prover too weak. 31448 trivial. 0 not checked. [2020-07-21 00:48:11,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822046474] [2020-07-21 00:48:11,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:11,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:48:11,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41924037] [2020-07-21 00:48:11,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:48:11,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:48:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:48:11,303 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 00:48:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:12,071 INFO L93 Difference]: Finished difference Result 299 states and 1198 transitions. [2020-07-21 00:48:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:48:12,073 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1082 [2020-07-21 00:48:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:12,081 INFO L225 Difference]: With dead ends: 299 [2020-07-21 00:48:12,081 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 00:48:12,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2171 GetRequests, 2127 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:48:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 00:48:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 150. [2020-07-21 00:48:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 00:48:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 00:48:12,128 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 1082 [2020-07-21 00:48:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:12,128 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 00:48:12,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:48:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 00:48:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2020-07-21 00:48:12,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:12,148 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 82, 82, 70, 69, 45, 45, 45, 45, 45, 45, 45, 41, 41, 41, 41, 41, 41, 41, 29, 24, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:12,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:12,361 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2095666861, now seen corresponding path program 7 times [2020-07-21 00:48:12,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:12,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930174902] [2020-07-21 00:48:12,363 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:13,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:13,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:13,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:48:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 41665 backedges. 933 proven. 3625 refuted. 0 times theorem prover too weak. 37107 trivial. 0 not checked. [2020-07-21 00:48:13,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:16,901 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 00:48:22,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:22,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:24,399 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 00:48:25,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:25,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:28,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 41665 backedges. 937 proven. 3673 refuted. 0 times theorem prover too weak. 37055 trivial. 0 not checked. [2020-07-21 00:48:33,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930174902] [2020-07-21 00:48:33,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:33,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:48:33,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742153518] [2020-07-21 00:48:33,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:48:33,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:33,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:48:33,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:48:33,288 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 25 states. [2020-07-21 00:48:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:34,505 INFO L93 Difference]: Finished difference Result 238 states and 729 transitions. [2020-07-21 00:48:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:48:34,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1184 [2020-07-21 00:48:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:34,513 INFO L225 Difference]: With dead ends: 238 [2020-07-21 00:48:34,513 INFO L226 Difference]: Without dead ends: 180 [2020-07-21 00:48:34,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2377 GetRequests, 2323 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:48:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-21 00:48:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 158. [2020-07-21 00:48:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-21 00:48:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 384 transitions. [2020-07-21 00:48:34,543 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 384 transitions. Word has length 1184 [2020-07-21 00:48:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:34,543 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 384 transitions. [2020-07-21 00:48:34,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:48:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 384 transitions. [2020-07-21 00:48:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2020-07-21 00:48:34,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:34,563 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 65, 63, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 24, 23, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:34,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:34,779 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:34,779 INFO L82 PathProgramCache]: Analyzing trace with hash 110307148, now seen corresponding path program 8 times [2020-07-21 00:48:34,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:34,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727222776] [2020-07-21 00:48:34,780 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:35,492 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:35,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:48:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36677 backedges. 641 proven. 2786 refuted. 0 times theorem prover too weak. 33250 trivial. 0 not checked. [2020-07-21 00:48:36,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:44,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36677 backedges. 643 proven. 2817 refuted. 0 times theorem prover too weak. 33217 trivial. 0 not checked. [2020-07-21 00:48:51,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727222776] [2020-07-21 00:48:51,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:51,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:48:51,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568494253] [2020-07-21 00:48:51,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:48:51,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:48:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:48:51,745 INFO L87 Difference]: Start difference. First operand 158 states and 384 transitions. Second operand 21 states. [2020-07-21 00:48:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:53,191 INFO L93 Difference]: Finished difference Result 259 states and 851 transitions. [2020-07-21 00:48:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:48:53,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1113 [2020-07-21 00:48:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:53,206 INFO L225 Difference]: With dead ends: 259 [2020-07-21 00:48:53,206 INFO L226 Difference]: Without dead ends: 245 [2020-07-21 00:48:53,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2233 GetRequests, 2189 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:48:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-21 00:48:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 178. [2020-07-21 00:48:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-21 00:48:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 483 transitions. [2020-07-21 00:48:53,255 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 483 transitions. Word has length 1113 [2020-07-21 00:48:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:53,257 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 483 transitions. [2020-07-21 00:48:53,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:48:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 483 transitions. [2020-07-21 00:48:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2020-07-21 00:48:53,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:53,282 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 70, 69, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 25, 25, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:53,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:53,497 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1872165901, now seen corresponding path program 9 times [2020-07-21 00:48:53,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:53,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581417330] [2020-07-21 00:48:53,498 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:54,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:54,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:48:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48753 backedges. 698 proven. 3700 refuted. 0 times theorem prover too weak. 44355 trivial. 0 not checked. [2020-07-21 00:48:55,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:07,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:12,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:12,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:14,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:15,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:16,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:16,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:16,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:17,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:17,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:17,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48753 backedges. 700 proven. 3738 refuted. 0 times theorem prover too weak. 44315 trivial. 0 not checked. [2020-07-21 00:49:18,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581417330] [2020-07-21 00:49:18,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:18,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:49:18,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799165190] [2020-07-21 00:49:18,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:49:18,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:18,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:49:18,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:49:18,408 INFO L87 Difference]: Start difference. First operand 178 states and 483 transitions. Second operand 23 states. [2020-07-21 00:49:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:19,611 INFO L93 Difference]: Finished difference Result 267 states and 914 transitions. [2020-07-21 00:49:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:49:19,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1280 [2020-07-21 00:49:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:19,621 INFO L225 Difference]: With dead ends: 267 [2020-07-21 00:49:19,622 INFO L226 Difference]: Without dead ends: 253 [2020-07-21 00:49:19,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2568 GetRequests, 2519 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:49:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-21 00:49:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 179. [2020-07-21 00:49:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 00:49:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 489 transitions. [2020-07-21 00:49:19,660 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 489 transitions. Word has length 1280 [2020-07-21 00:49:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:19,661 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 489 transitions. [2020-07-21 00:49:19,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:49:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 489 transitions. [2020-07-21 00:49:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2020-07-21 00:49:19,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:19,675 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 56, 56, 50, 44, 30, 30, 30, 30, 30, 30, 30, 28, 28, 28, 28, 28, 28, 28, 22, 14, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:19,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:19,888 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1190495147, now seen corresponding path program 10 times [2020-07-21 00:49:19,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:19,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580463159] [2020-07-21 00:49:19,890 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:20,644 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:20,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:20,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:49:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18903 backedges. 543 proven. 1829 refuted. 0 times theorem prover too weak. 16531 trivial. 0 not checked. [2020-07-21 00:49:21,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:29,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:33,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:33,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:36,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:36,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18903 backedges. 543 proven. 1861 refuted. 0 times theorem prover too weak. 16499 trivial. 0 not checked. [2020-07-21 00:49:36,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580463159] [2020-07-21 00:49:36,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:36,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:49:36,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303897316] [2020-07-21 00:49:36,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:49:36,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:49:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:49:36,954 INFO L87 Difference]: Start difference. First operand 179 states and 489 transitions. Second operand 21 states. [2020-07-21 00:49:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:38,006 INFO L93 Difference]: Finished difference Result 295 states and 1090 transitions. [2020-07-21 00:49:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:49:38,009 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 803 [2020-07-21 00:49:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:38,017 INFO L225 Difference]: With dead ends: 295 [2020-07-21 00:49:38,017 INFO L226 Difference]: Without dead ends: 281 [2020-07-21 00:49:38,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1613 GetRequests, 1569 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:49:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-07-21 00:49:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 173. [2020-07-21 00:49:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 00:49:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 458 transitions. [2020-07-21 00:49:38,058 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 458 transitions. Word has length 803 [2020-07-21 00:49:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:38,059 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 458 transitions. [2020-07-21 00:49:38,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:49:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 458 transitions. [2020-07-21 00:49:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2020-07-21 00:49:38,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:38,078 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 82, 82, 70, 65, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 29, 23, 17, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:38,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:38,294 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash 892505976, now seen corresponding path program 11 times [2020-07-21 00:49:38,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:38,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975196632] [2020-07-21 00:49:38,296 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:39,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:39,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:49:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38783 backedges. 594 proven. 2499 refuted. 0 times theorem prover too weak. 35690 trivial. 0 not checked. [2020-07-21 00:49:39,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:47,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 38783 backedges. 594 proven. 2523 refuted. 0 times theorem prover too weak. 35666 trivial. 0 not checked. [2020-07-21 00:49:51,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975196632] [2020-07-21 00:49:51,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:51,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:49:51,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700837525] [2020-07-21 00:49:51,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:49:51,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:49:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:49:51,999 INFO L87 Difference]: Start difference. First operand 173 states and 458 transitions. Second operand 19 states. [2020-07-21 00:49:52,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:52,588 INFO L93 Difference]: Finished difference Result 348 states and 1590 transitions. [2020-07-21 00:49:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:49:52,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1144 [2020-07-21 00:49:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:52,601 INFO L225 Difference]: With dead ends: 348 [2020-07-21 00:49:52,601 INFO L226 Difference]: Without dead ends: 334 [2020-07-21 00:49:52,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2294 GetRequests, 2255 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:49:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-07-21 00:49:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 175. [2020-07-21 00:49:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-21 00:49:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 473 transitions. [2020-07-21 00:49:52,651 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 473 transitions. Word has length 1144 [2020-07-21 00:49:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:52,652 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 473 transitions. [2020-07-21 00:49:52,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:49:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 473 transitions. [2020-07-21 00:49:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2020-07-21 00:49:52,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:52,668 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 73, 73, 62, 57, 38, 38, 38, 38, 38, 38, 38, 36, 36, 36, 36, 36, 36, 36, 24, 21, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:52,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:52,882 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash 501231271, now seen corresponding path program 12 times [2020-07-21 00:49:52,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:52,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757560587] [2020-07-21 00:49:52,884 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:53,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:53,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:49:53,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30731 backedges. 664 proven. 2413 refuted. 0 times theorem prover too weak. 27654 trivial. 0 not checked. [2020-07-21 00:49:54,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:59,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:03,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:03,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30731 backedges. 666 proven. 2441 refuted. 0 times theorem prover too weak. 27624 trivial. 0 not checked. [2020-07-21 00:50:06,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757560587] [2020-07-21 00:50:06,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:06,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:50:06,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075528806] [2020-07-21 00:50:06,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:50:06,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:50:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:50:06,035 INFO L87 Difference]: Start difference. First operand 175 states and 473 transitions. Second operand 21 states. [2020-07-21 00:50:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:06,706 INFO L93 Difference]: Finished difference Result 261 states and 855 transitions. [2020-07-21 00:50:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:50:06,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1020 [2020-07-21 00:50:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:06,714 INFO L225 Difference]: With dead ends: 261 [2020-07-21 00:50:06,715 INFO L226 Difference]: Without dead ends: 247 [2020-07-21 00:50:06,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2047 GetRequests, 2003 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:50:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-21 00:50:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 173. [2020-07-21 00:50:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 00:50:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 458 transitions. [2020-07-21 00:50:06,746 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 458 transitions. Word has length 1020 [2020-07-21 00:50:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:06,747 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 458 transitions. [2020-07-21 00:50:06,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:50:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 458 transitions. [2020-07-21 00:50:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1307 [2020-07-21 00:50:06,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:06,768 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 94, 94, 78, 75, 48, 48, 48, 48, 48, 48, 48, 47, 47, 47, 47, 47, 47, 47, 30, 28, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:06,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:06,981 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1138066554, now seen corresponding path program 13 times [2020-07-21 00:50:06,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:06,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153556617] [2020-07-21 00:50:06,983 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:07,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:50:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 50722 backedges. 1085 proven. 3981 refuted. 0 times theorem prover too weak. 45656 trivial. 0 not checked. [2020-07-21 00:50:08,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:18,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:24,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:24,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:25,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:25,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 50722 backedges. 1087 proven. 4031 refuted. 0 times theorem prover too weak. 45604 trivial. 0 not checked. [2020-07-21 00:50:28,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153556617] [2020-07-21 00:50:28,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:28,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:50:28,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969470925] [2020-07-21 00:50:28,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:50:28,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:50:28,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:50:28,185 INFO L87 Difference]: Start difference. First operand 173 states and 458 transitions. Second operand 25 states. [2020-07-21 00:50:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:29,347 INFO L93 Difference]: Finished difference Result 244 states and 737 transitions. [2020-07-21 00:50:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:50:29,350 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1306 [2020-07-21 00:50:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:29,355 INFO L225 Difference]: With dead ends: 244 [2020-07-21 00:50:29,355 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:50:29,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2621 GetRequests, 2567 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:50:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:50:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2020-07-21 00:50:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-21 00:50:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 495 transitions. [2020-07-21 00:50:29,386 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 495 transitions. Word has length 1306 [2020-07-21 00:50:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:29,387 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 495 transitions. [2020-07-21 00:50:29,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:50:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 495 transitions. [2020-07-21 00:50:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1232 [2020-07-21 00:50:29,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:29,408 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 85, 85, 73, 65, 48, 48, 48, 48, 48, 48, 48, 42, 42, 42, 42, 42, 42, 42, 31, 23, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:29,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:29,622 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1839595087, now seen corresponding path program 14 times [2020-07-21 00:50:29,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:29,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594315760] [2020-07-21 00:50:29,624 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:30,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:30,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:30,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:50:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45184 backedges. 830 proven. 2989 refuted. 0 times theorem prover too weak. 41365 trivial. 0 not checked. [2020-07-21 00:50:31,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:39,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:42,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:46,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45184 backedges. 832 proven. 3020 refuted. 0 times theorem prover too weak. 41332 trivial. 0 not checked. [2020-07-21 00:50:47,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594315760] [2020-07-21 00:50:47,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:47,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:50:47,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175917492] [2020-07-21 00:50:47,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:50:47,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:50:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:50:47,324 INFO L87 Difference]: Start difference. First operand 192 states and 495 transitions. Second operand 21 states. [2020-07-21 00:50:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:48,300 INFO L93 Difference]: Finished difference Result 296 states and 1016 transitions. [2020-07-21 00:50:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:50:48,303 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1231 [2020-07-21 00:50:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:48,311 INFO L225 Difference]: With dead ends: 296 [2020-07-21 00:50:48,311 INFO L226 Difference]: Without dead ends: 279 [2020-07-21 00:50:48,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2469 GetRequests, 2425 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:50:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-21 00:50:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 215. [2020-07-21 00:50:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 00:50:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 622 transitions. [2020-07-21 00:50:48,348 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 622 transitions. Word has length 1231 [2020-07-21 00:50:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:48,349 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 622 transitions. [2020-07-21 00:50:48,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:50:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 622 transitions. [2020-07-21 00:50:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2020-07-21 00:50:48,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:48,368 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 84, 84, 69, 65, 44, 44, 44, 44, 44, 44, 44, 42, 42, 42, 42, 42, 42, 42, 25, 24, 23, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:48,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:48,583 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1390560003, now seen corresponding path program 15 times [2020-07-21 00:50:48,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:48,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592132519] [2020-07-21 00:50:48,585 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:49,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:50:49,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 41262 backedges. 796 proven. 3304 refuted. 0 times theorem prover too weak. 37162 trivial. 0 not checked. [2020-07-21 00:50:50,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:00,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:00,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:03,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:05,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:06,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:07,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:07,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:07,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:07,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:07,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:08,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:08,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:08,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:08,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 41262 backedges. 804 proven. 3336 refuted. 0 times theorem prover too weak. 37122 trivial. 0 not checked. [2020-07-21 00:51:09,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592132519] [2020-07-21 00:51:09,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:09,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:51:09,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080892499] [2020-07-21 00:51:09,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:51:09,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:09,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:51:09,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:09,394 INFO L87 Difference]: Start difference. First operand 215 states and 622 transitions. Second operand 23 states. [2020-07-21 00:51:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:10,577 INFO L93 Difference]: Finished difference Result 356 states and 1333 transitions. [2020-07-21 00:51:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:51:10,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1179 [2020-07-21 00:51:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:10,587 INFO L225 Difference]: With dead ends: 356 [2020-07-21 00:51:10,587 INFO L226 Difference]: Without dead ends: 284 [2020-07-21 00:51:10,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2366 GetRequests, 2317 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:51:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-07-21 00:51:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 244. [2020-07-21 00:51:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 00:51:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 738 transitions. [2020-07-21 00:51:10,631 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 738 transitions. Word has length 1179 [2020-07-21 00:51:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:10,632 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 738 transitions. [2020-07-21 00:51:10,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:51:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 738 transitions. [2020-07-21 00:51:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1130 [2020-07-21 00:51:10,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:10,652 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 78, 78, 61, 59, 44, 44, 44, 44, 44, 44, 44, 39, 39, 39, 39, 39, 39, 39, 30, 20, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:10,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:10,868 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash 509985748, now seen corresponding path program 16 times [2020-07-21 00:51:10,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:10,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793204527] [2020-07-21 00:51:10,870 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:11,851 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:51:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 37965 backedges. 898 proven. 2966 refuted. 0 times theorem prover too weak. 34101 trivial. 0 not checked. [2020-07-21 00:51:12,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:23,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:30,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 37965 backedges. 902 proven. 3002 refuted. 0 times theorem prover too weak. 34061 trivial. 0 not checked. [2020-07-21 00:51:34,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793204527] [2020-07-21 00:51:34,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:34,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:51:34,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578606683] [2020-07-21 00:51:34,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:51:34,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:34,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:51:34,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:34,760 INFO L87 Difference]: Start difference. First operand 244 states and 738 transitions. Second operand 23 states. [2020-07-21 00:51:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:35,843 INFO L93 Difference]: Finished difference Result 332 states and 1206 transitions. [2020-07-21 00:51:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:51:35,847 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1129 [2020-07-21 00:51:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:35,853 INFO L225 Difference]: With dead ends: 332 [2020-07-21 00:51:35,853 INFO L226 Difference]: Without dead ends: 315 [2020-07-21 00:51:35,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2266 GetRequests, 2217 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:51:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-21 00:51:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 248. [2020-07-21 00:51:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-21 00:51:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 722 transitions. [2020-07-21 00:51:35,901 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 722 transitions. Word has length 1129 [2020-07-21 00:51:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:35,902 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 722 transitions. [2020-07-21 00:51:35,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:51:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 722 transitions. [2020-07-21 00:51:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-07-21 00:51:35,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:35,940 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 122, 122, 105, 94, 62, 62, 62, 62, 62, 62, 62, 61, 61, 61, 61, 61, 61, 61, 44, 32, 28, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:36,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:36,154 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash -855580482, now seen corresponding path program 17 times [2020-07-21 00:51:36,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:36,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68781554] [2020-07-21 00:51:36,156 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:37,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:37,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:51:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 85239 backedges. 930 proven. 4286 refuted. 0 times theorem prover too weak. 80023 trivial. 0 not checked. [2020-07-21 00:51:38,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:55,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:01,166 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:52:01,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:01,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:04,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:05,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:05,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:05,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:06,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:06,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 85239 backedges. 932 proven. 4314 refuted. 0 times theorem prover too weak. 79993 trivial. 0 not checked. [2020-07-21 00:52:08,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68781554] [2020-07-21 00:52:08,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:08,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:52:08,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489335631] [2020-07-21 00:52:08,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:52:08,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:52:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:52:08,390 INFO L87 Difference]: Start difference. First operand 248 states and 722 transitions. Second operand 21 states. [2020-07-21 00:52:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:09,536 INFO L93 Difference]: Finished difference Result 400 states and 1594 transitions. [2020-07-21 00:52:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:52:09,541 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1688 [2020-07-21 00:52:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:09,551 INFO L225 Difference]: With dead ends: 400 [2020-07-21 00:52:09,551 INFO L226 Difference]: Without dead ends: 383 [2020-07-21 00:52:09,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3383 GetRequests, 3339 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:52:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-21 00:52:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 238. [2020-07-21 00:52:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 00:52:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 653 transitions. [2020-07-21 00:52:09,611 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 653 transitions. Word has length 1688 [2020-07-21 00:52:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:09,612 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 653 transitions. [2020-07-21 00:52:09,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:52:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 653 transitions. [2020-07-21 00:52:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2020-07-21 00:52:09,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:09,624 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 56, 54, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 22, 20, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:09,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:09,825 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 502361729, now seen corresponding path program 18 times [2020-07-21 00:52:09,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:09,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941560477] [2020-07-21 00:52:09,827 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:10,859 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:52:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25955 backedges. 699 proven. 1805 refuted. 0 times theorem prover too weak. 23451 trivial. 0 not checked. [2020-07-21 00:52:11,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:20,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:20,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:24,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:24,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:25,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:25,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:26,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:26,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:27,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25955 backedges. 699 proven. 1831 refuted. 0 times theorem prover too weak. 23425 trivial. 0 not checked. [2020-07-21 00:52:29,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941560477] [2020-07-21 00:52:29,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:29,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:52:29,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871799481] [2020-07-21 00:52:29,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:52:29,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:52:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:52:29,134 INFO L87 Difference]: Start difference. First operand 238 states and 653 transitions. Second operand 19 states. [2020-07-21 00:52:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:29,931 INFO L93 Difference]: Finished difference Result 489 states and 2374 transitions. [2020-07-21 00:52:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:52:29,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 939 [2020-07-21 00:52:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:29,950 INFO L225 Difference]: With dead ends: 489 [2020-07-21 00:52:29,950 INFO L226 Difference]: Without dead ends: 472 [2020-07-21 00:52:29,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1884 GetRequests, 1845 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:52:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-21 00:52:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 240. [2020-07-21 00:52:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-21 00:52:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 667 transitions. [2020-07-21 00:52:30,012 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 667 transitions. Word has length 939 [2020-07-21 00:52:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:30,013 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 667 transitions. [2020-07-21 00:52:30,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:52:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 667 transitions. [2020-07-21 00:52:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1829 [2020-07-21 00:52:30,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:30,049 INFO L422 BasicCegarLoop]: trace histogram [139, 139, 130, 130, 105, 102, 69, 69, 69, 69, 69, 69, 69, 65, 65, 65, 65, 65, 65, 65, 37, 37, 36, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:30,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:30,250 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1164348337, now seen corresponding path program 19 times [2020-07-21 00:52:30,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:30,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735438339] [2020-07-21 00:52:30,252 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:31,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:31,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:31,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:52:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 100219 backedges. 1258 proven. 5235 refuted. 0 times theorem prover too weak. 93726 trivial. 0 not checked. [2020-07-21 00:52:33,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:38,315 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:52:38,421 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:52:38,528 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:52:38,635 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:52:38,741 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:52:53,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:52:53,524 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:52:54,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:07,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:08,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:09,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:09,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:09,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:10,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 100219 backedges. 1264 proven. 5275 refuted. 0 times theorem prover too weak. 93680 trivial. 0 not checked. [2020-07-21 00:53:13,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735438339] [2020-07-21 00:53:13,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:13,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 00:53:13,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239713817] [2020-07-21 00:53:13,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:53:13,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:13,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:53:13,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:53:13,223 INFO L87 Difference]: Start difference. First operand 240 states and 667 transitions. Second operand 24 states. [2020-07-21 00:53:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:14,647 INFO L93 Difference]: Finished difference Result 494 states and 2235 transitions. [2020-07-21 00:53:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:53:14,650 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1828 [2020-07-21 00:53:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:14,668 INFO L225 Difference]: With dead ends: 494 [2020-07-21 00:53:14,668 INFO L226 Difference]: Without dead ends: 451 [2020-07-21 00:53:14,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3664 GetRequests, 3615 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:53:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-07-21 00:53:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 262. [2020-07-21 00:53:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-21 00:53:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 760 transitions. [2020-07-21 00:53:14,767 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 760 transitions. Word has length 1828 [2020-07-21 00:53:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:14,768 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 760 transitions. [2020-07-21 00:53:14,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:53:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 760 transitions. [2020-07-21 00:53:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1029 [2020-07-21 00:53:14,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:14,801 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 67, 60, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 30, 23, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:15,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:15,016 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1552744989, now seen corresponding path program 20 times [2020-07-21 00:53:15,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:15,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480497593] [2020-07-21 00:53:15,019 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:16,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:53:16,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:53:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 31213 backedges. 610 proven. 2942 refuted. 0 times theorem prover too weak. 27661 trivial. 0 not checked. [2020-07-21 00:53:16,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:20,052 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:20,155 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:20,265 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:21,339 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:53:21,544 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:53:29,409 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:29,518 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:30,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:35,621 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:35,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:38,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:38,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:40,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:41,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:41,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:42,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:43,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:43,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31213 backedges. 622 proven. 2970 refuted. 0 times theorem prover too weak. 27621 trivial. 0 not checked. [2020-07-21 00:53:43,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480497593] [2020-07-21 00:53:43,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:43,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:53:43,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680095792] [2020-07-21 00:53:43,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:53:43,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:43,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:53:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:53:43,640 INFO L87 Difference]: Start difference. First operand 262 states and 760 transitions. Second operand 23 states. [2020-07-21 00:53:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:45,294 INFO L93 Difference]: Finished difference Result 687 states and 3863 transitions. [2020-07-21 00:53:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:53:45,298 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1028 [2020-07-21 00:53:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:45,321 INFO L225 Difference]: With dead ends: 687 [2020-07-21 00:53:45,321 INFO L226 Difference]: Without dead ends: 441 [2020-07-21 00:53:45,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2064 GetRequests, 2015 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:53:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-07-21 00:53:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 259. [2020-07-21 00:53:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-07-21 00:53:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 745 transitions. [2020-07-21 00:53:45,396 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 745 transitions. Word has length 1028 [2020-07-21 00:53:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:45,397 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 745 transitions. [2020-07-21 00:53:45,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:53:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 745 transitions. [2020-07-21 00:53:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1435 [2020-07-21 00:53:45,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:45,417 INFO L422 BasicCegarLoop]: trace histogram [106, 106, 105, 105, 81, 80, 53, 53, 53, 53, 53, 53, 53, 52, 52, 52, 52, 52, 52, 52, 28, 28, 26, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:45,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:45,618 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1305951852, now seen corresponding path program 21 times [2020-07-21 00:53:45,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:45,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118924392] [2020-07-21 00:53:45,621 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:46,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:53:46,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:53:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61316 backedges. 1054 proven. 3976 refuted. 0 times theorem prover too weak. 56286 trivial. 0 not checked. [2020-07-21 00:53:47,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:50,652 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:53:50,757 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:53:51,502 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:51,612 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:51,737 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:51,855 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:53,386 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:53:53,511 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:53:53,629 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:53:53,761 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:53:53,882 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 00:53:53,996 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:53:54,102 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:53:54,285 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:54:08,260 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:09,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:09,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:15,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:19,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:19,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:20,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:21,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:21,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:21,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:22,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:22,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:22,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:23,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 61316 backedges. 1058 proven. 4014 refuted. 0 times theorem prover too weak. 56244 trivial. 0 not checked. [2020-07-21 00:54:25,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118924392] [2020-07-21 00:54:25,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:25,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:54:25,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207866340] [2020-07-21 00:54:25,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:54:25,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:25,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:54:25,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:54:25,714 INFO L87 Difference]: Start difference. First operand 259 states and 745 transitions. Second operand 23 states. [2020-07-21 00:54:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:27,284 INFO L93 Difference]: Finished difference Result 405 states and 1509 transitions. [2020-07-21 00:54:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:54:27,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1434 [2020-07-21 00:54:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:27,297 INFO L225 Difference]: With dead ends: 405 [2020-07-21 00:54:27,297 INFO L226 Difference]: Without dead ends: 362 [2020-07-21 00:54:27,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2876 GetRequests, 2827 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:54:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-21 00:54:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 236. [2020-07-21 00:54:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 00:54:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 664 transitions. [2020-07-21 00:54:27,332 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 664 transitions. Word has length 1434 [2020-07-21 00:54:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:27,332 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 664 transitions. [2020-07-21 00:54:27,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:54:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 664 transitions. [2020-07-21 00:54:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2020-07-21 00:54:27,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:27,347 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 78, 78, 64, 62, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 24, 23, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:27,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:27,548 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash 148365018, now seen corresponding path program 22 times [2020-07-21 00:54:27,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:27,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968086157] [2020-07-21 00:54:27,552 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:28,714 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:54:28,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:28,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:54:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34963 backedges. 832 proven. 2094 refuted. 0 times theorem prover too weak. 32037 trivial. 0 not checked. [2020-07-21 00:54:29,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:34,183 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 00:54:34,292 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 00:54:41,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:48,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:48,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:52,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:53,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:53,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:53,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:54,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:54,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:55,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34963 backedges. 834 proven. 2116 refuted. 0 times theorem prover too weak. 32013 trivial. 0 not checked. [2020-07-21 00:54:57,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968086157] [2020-07-21 00:54:57,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:57,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:54:57,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671503263] [2020-07-21 00:54:57,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:54:57,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:54:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:54:57,502 INFO L87 Difference]: Start difference. First operand 236 states and 664 transitions. Second operand 19 states. [2020-07-21 00:54:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:58,984 INFO L93 Difference]: Finished difference Result 403 states and 1619 transitions. [2020-07-21 00:54:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:54:58,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1087 [2020-07-21 00:54:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:59,002 INFO L225 Difference]: With dead ends: 403 [2020-07-21 00:54:59,002 INFO L226 Difference]: Without dead ends: 385 [2020-07-21 00:54:59,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2180 GetRequests, 2141 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:54:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-07-21 00:54:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 250. [2020-07-21 00:54:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-21 00:54:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 725 transitions. [2020-07-21 00:54:59,067 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 725 transitions. Word has length 1087 [2020-07-21 00:54:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:59,068 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 725 transitions. [2020-07-21 00:54:59,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:54:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 725 transitions. [2020-07-21 00:54:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1297 [2020-07-21 00:54:59,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:59,098 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 89, 89, 75, 68, 51, 51, 51, 51, 51, 51, 51, 44, 44, 44, 44, 44, 44, 44, 31, 27, 21, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:59,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:59,312 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash 33980198, now seen corresponding path program 23 times [2020-07-21 00:54:59,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:59,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627058609] [2020-07-21 00:54:59,313 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:00,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:55:00,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:00,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:55:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50205 backedges. 880 proven. 3081 refuted. 0 times theorem prover too weak. 46244 trivial. 0 not checked. [2020-07-21 00:55:01,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:04,290 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:55:04,394 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:55:05,958 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:55:06,074 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:55:06,200 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:55:06,321 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:55:08,070 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:55:08,199 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:55:08,339 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:55:08,479 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:55:08,617 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:55:08,740 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:55:08,855 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:55:08,960 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:55:19,363 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:55:19,473 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:55:21,067 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:55:21,181 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:55:21,304 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:55:21,425 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:55:21,544 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:55:21,653 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:55:22,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:31,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:31,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:34,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:34,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:34,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:35,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:35,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:35,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:36,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:36,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:36,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50205 backedges. 880 proven. 3113 refuted. 0 times theorem prover too weak. 46212 trivial. 0 not checked. [2020-07-21 00:55:39,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627058609] [2020-07-21 00:55:39,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:39,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:55:39,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301094243] [2020-07-21 00:55:39,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:55:39,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:39,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:55:39,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:55:39,145 INFO L87 Difference]: Start difference. First operand 250 states and 725 transitions. Second operand 21 states. [2020-07-21 00:55:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:40,748 INFO L93 Difference]: Finished difference Result 364 states and 1299 transitions. [2020-07-21 00:55:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:55:40,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1296 [2020-07-21 00:55:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:40,764 INFO L225 Difference]: With dead ends: 364 [2020-07-21 00:55:40,765 INFO L226 Difference]: Without dead ends: 347 [2020-07-21 00:55:40,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2599 GetRequests, 2555 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:55:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-07-21 00:55:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 241. [2020-07-21 00:55:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-07-21 00:55:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 688 transitions. [2020-07-21 00:55:40,820 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 688 transitions. Word has length 1296 [2020-07-21 00:55:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:40,820 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 688 transitions. [2020-07-21 00:55:40,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:55:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 688 transitions. [2020-07-21 00:55:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1118 [2020-07-21 00:55:40,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:40,835 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 80, 80, 67, 65, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 26, 25, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:41,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:41,036 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 578041596, now seen corresponding path program 24 times [2020-07-21 00:55:41,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:41,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078890789] [2020-07-21 00:55:41,038 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:42,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:55:42,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:55:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36943 backedges. 1086 proven. 2788 refuted. 0 times theorem prover too weak. 33069 trivial. 0 not checked. [2020-07-21 00:55:43,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:45,578 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 00:55:45,691 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:55:45,802 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:55:46,787 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:55:46,907 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:55:47,033 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:55:47,157 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:55:48,131 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:55:48,268 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:55:48,417 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:55:48,566 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:55:49,929 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:55:50,088 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:55:50,256 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:55:50,422 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:55:50,584 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:55:50,733 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 00:55:50,875 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:55:51,008 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:55:51,223 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:55:58,624 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:55:59,531 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:55:59,641 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:55:59,756 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:55:59,874 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:00,914 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:56:01,062 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:56:01,211 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:56:01,362 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:56:01,505 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:56:01,640 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:56:01,765 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:56:01,880 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:56:01,985 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:56:02,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:07,177 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:56:07,285 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:56:08,291 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:56:08,410 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:56:08,538 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:08,668 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:08,789 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:56:08,902 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:56:09,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:09,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:15,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:17,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:17,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:18,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:19,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:20,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:20,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:21,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36943 backedges. 1092 proven. 2822 refuted. 0 times theorem prover too weak. 33029 trivial. 0 not checked. [2020-07-21 00:56:24,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078890789] [2020-07-21 00:56:24,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:56:24,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:56:24,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904106997] [2020-07-21 00:56:24,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:56:24,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:56:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:56:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:56:24,486 INFO L87 Difference]: Start difference. First operand 241 states and 688 transitions. Second operand 23 states. [2020-07-21 00:56:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:56:26,161 INFO L93 Difference]: Finished difference Result 330 states and 1039 transitions. [2020-07-21 00:56:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:56:26,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1117 [2020-07-21 00:56:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:56:26,172 INFO L225 Difference]: With dead ends: 330 [2020-07-21 00:56:26,173 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 00:56:26,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2242 GetRequests, 2193 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:56:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 00:56:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 251. [2020-07-21 00:56:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-07-21 00:56:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 764 transitions. [2020-07-21 00:56:26,213 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 764 transitions. Word has length 1117 [2020-07-21 00:56:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:56:26,214 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 764 transitions. [2020-07-21 00:56:26,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:56:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 764 transitions. [2020-07-21 00:56:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2020-07-21 00:56:26,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:56:26,238 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 91, 91, 69, 68, 48, 48, 48, 48, 48, 48, 48, 45, 45, 45, 45, 45, 45, 45, 28, 23, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:56:26,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:26,453 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:56:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:56:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1429826384, now seen corresponding path program 25 times [2020-07-21 00:56:26,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:56:26,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158480417] [2020-07-21 00:56:26,455 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:27,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:56:27,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:56:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:56:27,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:56:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47716 backedges. 954 proven. 2908 refuted. 0 times theorem prover too weak. 43854 trivial. 0 not checked. [2020-07-21 00:56:28,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:56:32,287 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:56:33,816 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:56:33,934 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:56:34,041 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:56:34,146 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:56:44,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:50,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:54,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:54,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:55,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:55,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:55,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:55,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:56,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:56,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:56,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:56,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:56,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:57,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47716 backedges. 958 proven. 2934 refuted. 0 times theorem prover too weak. 43824 trivial. 0 not checked. [2020-07-21 00:56:59,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158480417] [2020-07-21 00:56:59,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:56:59,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:56:59,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882184915] [2020-07-21 00:56:59,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:56:59,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:56:59,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:56:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:56:59,759 INFO L87 Difference]: Start difference. First operand 251 states and 764 transitions. Second operand 21 states. [2020-07-21 00:57:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:57:01,088 INFO L93 Difference]: Finished difference Result 343 states and 1165 transitions. [2020-07-21 00:57:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:57:01,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1266 [2020-07-21 00:57:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:57:01,101 INFO L225 Difference]: With dead ends: 343 [2020-07-21 00:57:01,101 INFO L226 Difference]: Without dead ends: 320 [2020-07-21 00:57:01,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2539 GetRequests, 2495 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:57:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-21 00:57:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 238. [2020-07-21 00:57:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 00:57:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 663 transitions. [2020-07-21 00:57:01,131 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 663 transitions. Word has length 1266 [2020-07-21 00:57:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:57:01,132 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 663 transitions. [2020-07-21 00:57:01,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:57:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 663 transitions. [2020-07-21 00:57:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1601 [2020-07-21 00:57:01,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:57:01,155 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 115, 115, 95, 88, 60, 60, 60, 60, 60, 60, 60, 57, 57, 57, 57, 57, 57, 57, 38, 28, 27, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:57:01,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:57:01,369 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:57:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:57:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1037801092, now seen corresponding path program 26 times [2020-07-21 00:57:01,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:57:01,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434506005] [2020-07-21 00:57:01,372 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:57:02,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:57:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:57:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:57:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:57:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 76537 backedges. 923 proven. 3359 refuted. 0 times theorem prover too weak. 72255 trivial. 0 not checked. [2020-07-21 00:57:04,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:57:28,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:28,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:34,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:39,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:39,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:40,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:40,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:40,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:40,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:40,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:41,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:41,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:42,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 76537 backedges. 923 proven. 3382 refuted. 0 times theorem prover too weak. 72232 trivial. 0 not checked. [2020-07-21 00:57:44,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434506005] [2020-07-21 00:57:44,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:57:44,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:57:44,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107942561] [2020-07-21 00:57:44,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:57:44,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:57:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:57:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:57:44,977 INFO L87 Difference]: Start difference. First operand 238 states and 663 transitions. Second operand 19 states. [2020-07-21 00:57:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:57:46,297 INFO L93 Difference]: Finished difference Result 324 states and 1006 transitions. [2020-07-21 00:57:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:57:46,304 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1600 [2020-07-21 00:57:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:57:46,312 INFO L225 Difference]: With dead ends: 324 [2020-07-21 00:57:46,312 INFO L226 Difference]: Without dead ends: 306 [2020-07-21 00:57:46,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3206 GetRequests, 3167 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:57:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-21 00:57:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 229. [2020-07-21 00:57:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 00:57:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 613 transitions. [2020-07-21 00:57:46,341 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 613 transitions. Word has length 1600 [2020-07-21 00:57:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:57:46,342 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 613 transitions. [2020-07-21 00:57:46,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:57:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 613 transitions. [2020-07-21 00:57:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1134 [2020-07-21 00:57:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:57:46,355 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 81, 81, 68, 68, 42, 42, 42, 42, 42, 42, 42, 40, 40, 40, 40, 40, 40, 40, 28, 26, 16, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:57:46,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:57:46,556 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:57:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:57:46,557 INFO L82 PathProgramCache]: Analyzing trace with hash -513056765, now seen corresponding path program 27 times [2020-07-21 00:57:46,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:57:46,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764229779] [2020-07-21 00:57:46,558 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:57:47,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:57:47,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:57:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:57:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:57:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 38024 backedges. 1471 proven. 2892 refuted. 0 times theorem prover too weak. 33661 trivial. 0 not checked. [2020-07-21 00:57:48,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:57:51,645 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:57:51,754 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:57:52,248 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:52,377 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:52,507 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:57:52,623 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:57:52,750 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:57:52,873 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:57:53,010 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:57:53,142 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:57:53,912 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:57:54,018 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:57:54,133 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:57:54,254 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:57:55,488 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:57:55,647 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:57:55,811 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:57:55,976 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:57:56,134 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:57:56,279 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 00:57:56,417 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:57:56,548 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 00:57:56,669 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:57:56,787 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:57:56,901 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:58:06,852 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:06,968 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:07,085 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:58:07,206 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:58:07,338 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:58:07,466 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:58:07,608 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:07,748 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:08,552 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:58:08,699 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:58:08,854 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:58:09,008 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:58:09,158 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 00:58:09,294 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 00:58:09,427 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:58:09,551 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:58:09,666 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:58:09,773 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:58:10,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:10,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:12,679 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:58:16,070 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:16,174 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:16,639 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:16,844 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:58:16,963 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:58:17,091 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:58:17,223 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:58:17,360 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:17,496 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:17,628 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:58:17,743 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:58:17,847 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:58:18,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:18,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:19,696 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 00:58:20,333 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:20,447 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:20,958 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:21,079 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:21,205 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:58:21,334 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:58:21,456 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:58:21,566 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:21,671 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:21,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:21,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:25,060 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 00:58:25,269 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:25,382 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:25,492 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:58:25,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:25,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:28,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:29,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:30,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:30,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:30,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:31,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:31,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:32,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38024 backedges. 1473 proven. 2942 refuted. 0 times theorem prover too weak. 33609 trivial. 0 not checked. [2020-07-21 00:58:36,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764229779] [2020-07-21 00:58:36,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:58:36,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:58:36,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908810597] [2020-07-21 00:58:36,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:58:36,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:58:36,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:58:36,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:58:36,083 INFO L87 Difference]: Start difference. First operand 229 states and 613 transitions. Second operand 25 states. [2020-07-21 00:58:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:58:38,707 INFO L93 Difference]: Finished difference Result 345 states and 1048 transitions. [2020-07-21 00:58:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:58:38,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1133 [2020-07-21 00:58:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:58:38,723 INFO L225 Difference]: With dead ends: 345 [2020-07-21 00:58:38,723 INFO L226 Difference]: Without dead ends: 314 [2020-07-21 00:58:38,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2275 GetRequests, 2221 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:58:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-21 00:58:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 287. [2020-07-21 00:58:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-07-21 00:58:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 772 transitions. [2020-07-21 00:58:38,760 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 772 transitions. Word has length 1133 [2020-07-21 00:58:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:58:38,761 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 772 transitions. [2020-07-21 00:58:38,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:58:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 772 transitions. [2020-07-21 00:58:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1332 [2020-07-21 00:58:38,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:58:38,783 INFO L422 BasicCegarLoop]: trace histogram [99, 99, 96, 96, 78, 76, 49, 49, 49, 49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 30, 27, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:58:38,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:58:38,984 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:58:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:58:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash 637933490, now seen corresponding path program 28 times [2020-07-21 00:58:38,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:58:38,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559090119] [2020-07-21 00:58:38,987 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:58:40,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:58:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:58:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:58:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:58:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 52713 backedges. 1090 proven. 3045 refuted. 0 times theorem prover too weak. 48578 trivial. 0 not checked. [2020-07-21 00:58:41,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:58:44,365 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:44,476 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:45,247 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:45,365 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:45,487 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:45,612 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:48,192 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:48,313 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:48,456 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:58:48,599 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:58:48,741 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:58:48,869 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:58:48,989 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:58:49,101 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:49,205 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43