/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_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:45:36,412 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:45:36,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:45:36,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:45:36,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:45:36,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:45:36,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:45:36,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:45:36,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:45:36,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:45:36,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:45:36,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:45:36,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:45:36,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:45:36,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:45:36,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:45:36,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:45:36,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:45:36,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:45:36,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:45:36,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:45:36,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:45:36,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:45:36,471 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 00:45:36,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:45:36,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:45:36,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:45:36,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:45:36,488 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:45:36,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:45:36,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:45:36,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:45:36,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:45:36,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:45:36,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:45:36,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:45:36,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:45:36,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:45:36,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:45:36,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:45:36,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:45:36,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:45:36,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:45:36,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:45:36,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:45:36,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:45:36,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:45:36,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:45:36,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:45:36,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:45:36,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:36,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:45:36,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:45:36,493 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 00:45:36,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:45:36,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:45:36,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:45:36,809 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:45:36,810 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:45:36,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 00:45:36,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61fc46cbe/535af1b452e54113851a3bdf2235bec6/FLAG4685972af [2020-07-21 00:45:37,396 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:45:37,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 00:45:37,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61fc46cbe/535af1b452e54113851a3bdf2235bec6/FLAG4685972af [2020-07-21 00:45:37,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61fc46cbe/535af1b452e54113851a3bdf2235bec6 [2020-07-21 00:45:37,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:45:37,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:45:37,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:45:37,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:45:37,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:45:37,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:45:37" (1/1) ... [2020-07-21 00:45:37,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d5b002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:37, skipping insertion in model container [2020-07-21 00:45:37,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:45:37" (1/1) ... [2020-07-21 00:45:37,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:45:37,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:45:38,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:45:38,027 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:45:38,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:45:38,056 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:45:38,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38 WrapperNode [2020-07-21 00:45:38,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:45:38,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:45:38,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:45:38,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:45:38,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (1/1) ... [2020-07-21 00:45:38,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:45:38,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:45:38,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:45:38,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:45:38,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (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 00:45:38,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:45:38,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:45:38,249 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 00:45:38,249 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 00:45:38,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:45:38,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:45:38,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:45:38,249 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 00:45:38,250 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 00:45:38,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:45:38,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:45:38,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:45:38,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:45:38,465 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:45:38,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:45:38 BoogieIcfgContainer [2020-07-21 00:45:38,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:45:38,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:45:38,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:45:38,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:45:38,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:45:37" (1/3) ... [2020-07-21 00:45:38,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25675230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:45:38, skipping insertion in model container [2020-07-21 00:45:38,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:45:38" (2/3) ... [2020-07-21 00:45:38,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25675230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:45:38, skipping insertion in model container [2020-07-21 00:45:38,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:45:38" (3/3) ... [2020-07-21 00:45:38,480 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2020-07-21 00:45:38,493 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:45:38,505 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:45:38,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:45:38,612 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:45:38,612 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:45:38,612 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:45:38,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:45:38,615 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:45:38,615 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:45:38,615 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:45:38,615 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:45:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 00:45:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:45:38,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:38,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:38,659 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:38,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 00:45:38,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:38,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748479493] [2020-07-21 00:45:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:45:38,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:38,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:38,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:45:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:38,828 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 00:45:38,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:45:38,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748479493] [2020-07-21 00:45:38,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:45:38,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:45:38,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369524608] [2020-07-21 00:45:38,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:45:38,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:38,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:45:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:45:38,853 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 00:45:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:38,978 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 00:45:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:45:38,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:45:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:38,993 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:45:38,994 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:45:38,998 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 00:45:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:45:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:45:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:45:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:45:39,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 00:45:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:39,054 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:45:39,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:45:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:45:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:45:39,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:39,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:39,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:39,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 00:45:39,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:39,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596022887] [2020-07-21 00:45:39,268 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 00:45:39,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:45:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:45:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:39,368 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 00:45:39,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:45:39,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596022887] [2020-07-21 00:45:39,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:45:39,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:45:39,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10292508] [2020-07-21 00:45:39,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:45:39,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:45:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:45:39,375 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 00:45:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:39,487 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:45:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:45:39,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:45:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:39,490 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:45:39,491 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 00:45:39,492 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 00:45:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 00:45:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 00:45:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:45:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:45:39,503 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 00:45:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:39,503 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:45:39,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:45:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:45:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:45:39,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:39,506 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 00:45:39,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:39,714 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 00:45:39,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:39,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193675037] [2020-07-21 00:45:39,717 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 00:45:39,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:45:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:39,841 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 00:45:39,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:40,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:40,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:40,133 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 00:45:40,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193675037] [2020-07-21 00:45:40,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:40,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:45:40,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489887063] [2020-07-21 00:45:40,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:45:40,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:45:40,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:45:40,138 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 00:45:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:40,322 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 00:45:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:45:40,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 00:45:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:40,326 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:45:40,327 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:45:40,328 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 00:45:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:45:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 00:45:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:45:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:45:40,350 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 00:45:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:40,351 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:45:40,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:45:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:45:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:45:40,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:40,353 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 00:45:40,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:40,567 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 00:45:40,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:40,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697400119] [2020-07-21 00:45:40,570 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 00:45:40,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:40,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:40,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:45:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:40,661 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 00:45:40,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:40,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:40,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:40,838 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 00:45:40,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697400119] [2020-07-21 00:45:40,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:40,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:45:40,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641822194] [2020-07-21 00:45:40,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:45:40,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:40,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:45:40,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:45:40,841 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 00:45:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:40,969 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 00:45:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:45:40,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 00:45:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:40,972 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:45:40,973 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:45:40,973 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 00:45:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:45:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 00:45:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:45:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:45:40,984 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 00:45:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:40,985 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:45:40,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:45:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:45:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:45:40,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:40,987 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 00:45:41,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:41,203 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:41,204 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 00:45:41,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:41,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578773141] [2020-07-21 00:45:41,205 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 00:45:41,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:45:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:41,296 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 00:45:41,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:41,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:41,689 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 00:45:41,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578773141] [2020-07-21 00:45:41,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:41,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:45:41,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499548933] [2020-07-21 00:45:41,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:45:41,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:41,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:45:41,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:45:41,692 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 00:45:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:41,874 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 00:45:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:45:41,875 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 00:45:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:41,877 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:45:41,878 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 00:45:41,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 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 00:45:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 00:45:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 00:45:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:45:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:45:41,902 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 00:45:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:41,902 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:45:41,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:45:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:45:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:45:41,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:41,905 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 00:45:42,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:42,122 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 00:45:42,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:42,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220831227] [2020-07-21 00:45:42,124 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 00:45:42,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:42,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:45:42,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:42,214 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 00:45:42,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:42,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:42,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:42,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:42,555 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 00:45:42,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220831227] [2020-07-21 00:45:42,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:42,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:45:42,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553285487] [2020-07-21 00:45:42,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:45:42,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:45:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:45:42,558 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 00:45:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:42,717 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 00:45:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:45:42,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 00:45:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:42,722 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:45:42,722 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 00:45:42,723 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 00:45:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 00:45:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 00:45:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:45:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:45:42,744 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 00:45:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:42,746 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:45:42,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:45:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:45:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:45:42,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:42,749 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 00:45:42,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:42,951 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 00:45:42,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:42,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850267295] [2020-07-21 00:45:42,953 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 00:45:42,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:45:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:43,069 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 00:45:43,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:43,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:43,650 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 00:45:43,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850267295] [2020-07-21 00:45:43,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:43,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:45:43,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842253162] [2020-07-21 00:45:43,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:45:43,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:45:43,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:45:43,652 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 00:45:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:43,855 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 00:45:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:45:43,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 00:45:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:43,858 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:45:43,858 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:45:43,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 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 00:45:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:45:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 00:45:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:45:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:45:43,870 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 00:45:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:43,870 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:45:43,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:45:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:45:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:45:43,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:43,873 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 00:45:44,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:44,088 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 00:45:44,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:44,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651017504] [2020-07-21 00:45:44,091 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 00:45:44,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:44,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:45:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:44,216 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 00:45:44,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:44,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:44,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:44,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:44,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:44,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:44,779 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 00:45:44,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651017504] [2020-07-21 00:45:44,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:44,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:45:44,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289029601] [2020-07-21 00:45:44,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:45:44,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:44,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:45:44,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:45:44,782 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 00:45:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:44,985 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 00:45:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:45:44,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 00:45:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:44,988 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:45:44,988 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:45:44,989 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 00:45:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:45:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 00:45:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:45:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:45:45,001 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 00:45:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:45,001 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:45:45,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:45:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:45:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 00:45:45,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:45,004 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 00:45:45,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:45,208 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:45,209 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 00:45:45,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:45,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125359416] [2020-07-21 00:45:45,210 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 00:45:45,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:45:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:45,387 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 00:45:45,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:46,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:46,343 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 00:45:46,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125359416] [2020-07-21 00:45:46,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:46,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:45:46,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48628246] [2020-07-21 00:45:46,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:45:46,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:46,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:45:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:45:46,346 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 00:45:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:46,614 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 00:45:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:45:46,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 00:45:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:46,617 INFO L225 Difference]: With dead ends: 71 [2020-07-21 00:45:46,618 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 00:45:46,619 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 00:45:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 00:45:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 00:45:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:45:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:45:46,637 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 00:45:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:46,638 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:45:46,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:45:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:45:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:45:46,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:46,643 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 00:45:46,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:46,845 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 00:45:46,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:46,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563092716] [2020-07-21 00:45:46,847 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 00:45:46,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:45:46,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:46,994 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 00:45:46,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:47,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:47,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:47,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:47,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:47,990 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 00:45:47,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563092716] [2020-07-21 00:45:47,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:47,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:45:47,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553567071] [2020-07-21 00:45:47,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:45:47,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:45:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:45:47,995 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 00:45:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:48,231 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 00:45:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:45:48,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 00:45:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:48,234 INFO L225 Difference]: With dead ends: 76 [2020-07-21 00:45:48,234 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:45:48,235 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 00:45:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:45:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 00:45:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:45:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:45:48,262 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 00:45:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:48,265 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:45:48,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:45:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:45:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 00:45:48,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:48,271 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 00:45:48,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:48,487 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:48,488 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 00:45:48,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:48,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181663148] [2020-07-21 00:45:48,489 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 00:45:48,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:48,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:45:48,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:48,696 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 00:45:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:49,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:50,555 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 00:45:50,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181663148] [2020-07-21 00:45:50,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:50,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 00:45:50,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304952536] [2020-07-21 00:45:50,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:45:50,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:45:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:45:50,558 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 00:45:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:50,855 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 00:45:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:45:50,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 00:45:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:50,860 INFO L225 Difference]: With dead ends: 81 [2020-07-21 00:45:50,860 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 00:45:50,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:45:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 00:45:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 00:45:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:45:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:45:50,872 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 00:45:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:50,873 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:45:50,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:45:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:45:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:45:50,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:50,875 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 00:45:51,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:51,091 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 00:45:51,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:51,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848492004] [2020-07-21 00:45:51,093 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 00:45:51,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:51,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:45:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:51,255 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 00:45:51,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:52,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:52,793 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 00:45:52,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848492004] [2020-07-21 00:45:52,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:52,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 00:45:52,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138184531] [2020-07-21 00:45:52,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:45:52,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:52,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:45:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:45:52,798 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 00:45:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:53,104 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 00:45:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:45:53,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 00:45:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:53,108 INFO L225 Difference]: With dead ends: 86 [2020-07-21 00:45:53,108 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 00:45:53,109 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 00:45:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 00:45:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 00:45:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:45:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:45:53,119 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 00:45:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:53,120 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:45:53,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:45:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:45:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 00:45:53,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:53,122 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 00:45:53,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:53,336 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:53,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 00:45:53,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:53,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105405271] [2020-07-21 00:45:53,338 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 00:45:53,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:45:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:53,544 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 00:45:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:54,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:54,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:55,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:56,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:56,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:56,094 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 00:45:56,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105405271] [2020-07-21 00:45:56,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:56,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 00:45:56,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497354818] [2020-07-21 00:45:56,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:45:56,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:56,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:45:56,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:45:56,097 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 00:45:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:56,530 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 00:45:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:45:56,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 00:45:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:56,535 INFO L225 Difference]: With dead ends: 91 [2020-07-21 00:45:56,535 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 00:45:56,536 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 00:45:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 00:45:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 00:45:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:45:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 00:45:56,548 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 00:45:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:56,549 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 00:45:56,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:45:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 00:45:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 00:45:56,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:56,553 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 00:45:56,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:56,768 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 00:45:56,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:56,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570600535] [2020-07-21 00:45:56,771 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 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 00:45:56,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:45:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:45:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:57,051 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 00:45:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:58,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:58,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:58,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,536 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 00:45:59,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570600535] [2020-07-21 00:45:59,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:59,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 00:45:59,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892380393] [2020-07-21 00:45:59,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:45:59,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:45:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:45:59,539 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 00:45:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:59,898 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 00:45:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:45:59,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 00:45:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:59,904 INFO L225 Difference]: With dead ends: 96 [2020-07-21 00:45:59,904 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 00:45:59,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:45:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 00:45:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 00:45:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:45:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 00:45:59,926 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 00:45:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:59,927 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 00:45:59,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:45:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 00:45:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 00:45:59,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:59,935 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 00:46:00,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:00,150 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 00:46:00,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:00,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125681570] [2020-07-21 00:46:00,152 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 00:46:00,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:00,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:46:00,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:00,488 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 00:46:00,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:02,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:02,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:04,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:04,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:04,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:04,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:04,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:04,733 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 00:46:04,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125681570] [2020-07-21 00:46:04,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:04,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 00:46:04,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085024043] [2020-07-21 00:46:04,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:46:04,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:46:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:46:04,737 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 00:46:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:05,275 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 00:46:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:46:05,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 00:46:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:05,284 INFO L225 Difference]: With dead ends: 101 [2020-07-21 00:46:05,284 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 00:46:05,285 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 00:46:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 00:46:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 00:46:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:46:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 00:46:05,307 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 00:46:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:05,308 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 00:46:05,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:46:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 00:46:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 00:46:05,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:05,314 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 00:46:05,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:05,529 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 00:46:05,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:05,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072729834] [2020-07-21 00:46:05,530 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 00:46:05,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:05,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:05,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:46:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:05,898 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 00:46:05,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:08,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:08,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:09,957 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 00:46:09,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072729834] [2020-07-21 00:46:09,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:09,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 00:46:09,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775011934] [2020-07-21 00:46:09,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:46:09,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:09,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:46:09,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:46:09,960 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 00:46:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:10,447 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 00:46:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:46:10,448 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 00:46:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:10,450 INFO L225 Difference]: With dead ends: 106 [2020-07-21 00:46:10,451 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 00:46:10,453 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 00:46:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 00:46:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 00:46:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:46:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 00:46:10,470 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 00:46:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:10,472 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 00:46:10,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:46:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 00:46:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 00:46:10,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:10,481 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 00:46:10,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:10,695 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 00:46:10,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:10,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694735925] [2020-07-21 00:46:10,697 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 00:46:10,944 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:10,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:11,412 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 00:46:11,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:15,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:16,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:17,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:17,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:18,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:19,374 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 00:46:19,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694735925] [2020-07-21 00:46:19,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:19,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 00:46:19,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611890591] [2020-07-21 00:46:19,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:46:19,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:46:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:46:19,379 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 00:46:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:20,016 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 00:46:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:20,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 00:46:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:20,020 INFO L225 Difference]: With dead ends: 111 [2020-07-21 00:46:20,021 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 00:46:20,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:46:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 00:46:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 00:46:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:46:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 00:46:20,044 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 00:46:20,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:20,045 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 00:46:20,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:46:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 00:46:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 00:46:20,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:20,049 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 00:46:20,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:20,264 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:20,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 00:46:20,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:20,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788945649] [2020-07-21 00:46:20,265 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 00:46:20,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:20,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:20,791 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 00:46:20,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:23,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:24,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:24,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:25,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:26,524 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 00:46:26,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788945649] [2020-07-21 00:46:26,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:26,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:46:26,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299730856] [2020-07-21 00:46:26,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:46:26,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:46:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:46:26,527 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 23 states. [2020-07-21 00:46:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:27,095 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 00:46:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:27,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 418 [2020-07-21 00:46:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:27,100 INFO L225 Difference]: With dead ends: 116 [2020-07-21 00:46:27,101 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 00:46:27,102 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 00:46:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 00:46:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 00:46:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:46:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 00:46:27,115 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 00:46:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:27,116 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 00:46:27,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:46:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 00:46:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 00:46:27,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:27,147 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 00:46:27,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:27,361 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1777656900, now seen corresponding path program 8 times [2020-07-21 00:46:27,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:27,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888329414] [2020-07-21 00:46:27,363 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 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 00:46:27,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:27,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:46:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:28,033 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 00:46:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:32,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:32,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:33,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:33,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:35,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:35,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:35,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:36,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:36,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:36,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:36,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:36,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:36,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:37,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:37,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:37,295 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 00:46:37,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888329414] [2020-07-21 00:46:37,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:37,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:46:37,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411736717] [2020-07-21 00:46:37,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:46:37,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:37,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:46:37,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:46:37,299 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 25 states. [2020-07-21 00:46:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:37,903 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 00:46:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:46:37,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 676 [2020-07-21 00:46:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:37,907 INFO L225 Difference]: With dead ends: 121 [2020-07-21 00:46:37,907 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 00:46:37,914 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 00:46:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 00:46:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 00:46:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 00:46:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 00:46:37,929 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 676 [2020-07-21 00:46:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:37,929 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 00:46:37,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:46:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 00:46:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2020-07-21 00:46:37,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:37,938 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 00:46:38,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:38,153 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1813836186, now seen corresponding path program 4 times [2020-07-21 00:46:38,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:38,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480221002] [2020-07-21 00:46:38,155 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 00:46:38,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:38,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:38,960 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 00:46:38,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:42,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:43,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:45,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:45,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:45,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:46,825 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 00:46:46,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480221002] [2020-07-21 00:46:46,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:46,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:46:46,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703456251] [2020-07-21 00:46:46,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:46:46,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:46:46,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:46:46,827 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 23 states. [2020-07-21 00:46:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:47,489 INFO L93 Difference]: Finished difference Result 159 states and 539 transitions. [2020-07-21 00:46:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:47,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 754 [2020-07-21 00:46:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:47,496 INFO L225 Difference]: With dead ends: 159 [2020-07-21 00:46:47,496 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 00:46:47,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1468 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 00:46:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 00:46:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2020-07-21 00:46:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 00:46:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2020-07-21 00:46:47,518 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 754 [2020-07-21 00:46:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:47,519 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2020-07-21 00:46:47,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:46:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2020-07-21 00:46:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-07-21 00:46:47,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:47,528 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 00:46:47,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:47,741 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 848822556, now seen corresponding path program 1 times [2020-07-21 00:46:47,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:47,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820902287] [2020-07-21 00:46:47,742 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 00:46:48,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:48,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:46:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:48,555 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 00:46:48,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:51,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:51,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:52,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:53,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:54,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:55,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:55,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:55,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:55,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:55,426 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 00:46:55,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820902287] [2020-07-21 00:46:55,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:55,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:46:55,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948403351] [2020-07-21 00:46:55,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:46:55,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:46:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:46:55,429 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand 21 states. [2020-07-21 00:46:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:55,953 INFO L93 Difference]: Finished difference Result 179 states and 673 transitions. [2020-07-21 00:46:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:46:55,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 765 [2020-07-21 00:46:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:55,959 INFO L225 Difference]: With dead ends: 179 [2020-07-21 00:46:55,959 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 00:46:55,960 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 00:46:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 00:46:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2020-07-21 00:46:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 00:46:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2020-07-21 00:46:55,985 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 765 [2020-07-21 00:46:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:55,986 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2020-07-21 00:46:55,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:46:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2020-07-21 00:46:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1080 [2020-07-21 00:46:55,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:55,999 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 00:46:56,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:56,214 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash 67032718, now seen corresponding path program 1 times [2020-07-21 00:46:56,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:56,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390454373] [2020-07-21 00:46:56,216 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 00:46:56,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:46:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:57,389 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 00:46:57,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:01,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:05,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:05,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:07,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:07,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:07,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:07,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:07,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:07,701 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 00:47:07,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390454373] [2020-07-21 00:47:07,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:07,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:47:07,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954970928] [2020-07-21 00:47:07,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:47:07,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:47:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:47:07,704 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand 23 states. [2020-07-21 00:47:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:08,399 INFO L93 Difference]: Finished difference Result 156 states and 522 transitions. [2020-07-21 00:47:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:47:08,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1079 [2020-07-21 00:47:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:08,408 INFO L225 Difference]: With dead ends: 156 [2020-07-21 00:47:08,408 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 00:47:08,409 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 00:47:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 00:47:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-07-21 00:47:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 00:47:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2020-07-21 00:47:08,427 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 1079 [2020-07-21 00:47:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:08,428 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2020-07-21 00:47:08,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:47:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2020-07-21 00:47:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-07-21 00:47:08,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:08,440 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 00:47:08,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:08,654 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1973171480, now seen corresponding path program 2 times [2020-07-21 00:47:08,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:08,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574157113] [2020-07-21 00:47:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:47:09,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:47:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:09,619 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 00:47:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:13,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:13,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:15,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:15,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:16,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:16,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:16,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:16,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:17,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:18,160 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 00:47:18,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574157113] [2020-07-21 00:47:18,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:18,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:47:18,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707025930] [2020-07-21 00:47:18,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:47:18,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:47:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:47:18,163 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand 21 states. [2020-07-21 00:47:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:18,764 INFO L93 Difference]: Finished difference Result 174 states and 639 transitions. [2020-07-21 00:47:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:47:18,765 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 980 [2020-07-21 00:47:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:18,771 INFO L225 Difference]: With dead ends: 174 [2020-07-21 00:47:18,771 INFO L226 Difference]: Without dead ends: 170 [2020-07-21 00:47:18,772 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 00:47:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-21 00:47:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 89. [2020-07-21 00:47:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-21 00:47:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 197 transitions. [2020-07-21 00:47:18,795 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 197 transitions. Word has length 980 [2020-07-21 00:47:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:18,796 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 197 transitions. [2020-07-21 00:47:18,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:47:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 197 transitions. [2020-07-21 00:47:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2020-07-21 00:47:18,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:18,813 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 00:47:19,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:19,027 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:19,028 INFO L82 PathProgramCache]: Analyzing trace with hash -191683652, now seen corresponding path program 3 times [2020-07-21 00:47:19,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:19,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589311400] [2020-07-21 00:47:19,029 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 00:47:19,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:47:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:20,795 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 00:47:20,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:26,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:28,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:31,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:32,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:33,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:34,442 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 00:47:34,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589311400] [2020-07-21 00:47:34,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:34,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:47:34,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653711054] [2020-07-21 00:47:34,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:47:34,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:34,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:47:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:47:34,445 INFO L87 Difference]: Start difference. First operand 89 states and 197 transitions. Second operand 25 states. [2020-07-21 00:47:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:35,541 INFO L93 Difference]: Finished difference Result 263 states and 1331 transitions. [2020-07-21 00:47:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:47:35,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1134 [2020-07-21 00:47:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:35,550 INFO L225 Difference]: With dead ends: 263 [2020-07-21 00:47:35,550 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 00:47:35,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2277 GetRequests, 2223 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:47:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 00:47:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-07-21 00:47:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 00:47:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 326 transitions. [2020-07-21 00:47:35,586 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 326 transitions. Word has length 1134 [2020-07-21 00:47:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:35,587 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 326 transitions. [2020-07-21 00:47:35,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:47:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 326 transitions. [2020-07-21 00:47:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2020-07-21 00:47:35,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:35,608 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 00:47:35,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:35,822 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash 873446842, now seen corresponding path program 4 times [2020-07-21 00:47:35,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:35,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075121831] [2020-07-21 00:47:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:47:36,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:36,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:47:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:36,929 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 00:47:36,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:43,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:43,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:45,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:45,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:47,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:48,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:48,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:48,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:48,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:50,421 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 00:47:50,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075121831] [2020-07-21 00:47:50,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:50,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:47:50,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014282477] [2020-07-21 00:47:50,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:47:50,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:47:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:47:50,424 INFO L87 Difference]: Start difference. First operand 142 states and 326 transitions. Second operand 25 states. [2020-07-21 00:47:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:51,484 INFO L93 Difference]: Finished difference Result 385 states and 1941 transitions. [2020-07-21 00:47:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:47:51,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1000 [2020-07-21 00:47:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:51,495 INFO L225 Difference]: With dead ends: 385 [2020-07-21 00:47:51,495 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:47:51,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2009 GetRequests, 1955 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 00:47:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:47:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2020-07-21 00:47:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 00:47:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 346 transitions. [2020-07-21 00:47:51,552 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 346 transitions. Word has length 1000 [2020-07-21 00:47:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:51,553 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 346 transitions. [2020-07-21 00:47:51,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:47:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 346 transitions. [2020-07-21 00:47:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2020-07-21 00:47:51,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:51,575 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 70, 70, 53, 51, 37, 37, 37, 37, 37, 37, 37, 35, 35, 35, 35, 35, 35, 35, 22, 19, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:51,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:51,792 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 401393431, now seen corresponding path program 5 times [2020-07-21 00:47:51,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:51,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640819333] [2020-07-21 00:47:51,794 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 00:47:52,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:47:52,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:47:52,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28457 backedges. 601 proven. 2717 refuted. 0 times theorem prover too weak. 25139 trivial. 0 not checked. [2020-07-21 00:47:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:58,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:01,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:03,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 28457 backedges. 603 proven. 2755 refuted. 0 times theorem prover too weak. 25099 trivial. 0 not checked. [2020-07-21 00:48:04,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640819333] [2020-07-21 00:48:04,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:04,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:48:04,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999529368] [2020-07-21 00:48:04,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:48:04,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:48:04,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:48:04,577 INFO L87 Difference]: Start difference. First operand 147 states and 346 transitions. Second operand 23 states. [2020-07-21 00:48:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:05,314 INFO L93 Difference]: Finished difference Result 263 states and 940 transitions. [2020-07-21 00:48:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:48:05,315 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 981 [2020-07-21 00:48:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:05,324 INFO L225 Difference]: With dead ends: 263 [2020-07-21 00:48:05,324 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 00:48:05,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1970 GetRequests, 1921 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:48:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 00:48:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 150. [2020-07-21 00:48:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 00:48:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 00:48:05,368 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 981 [2020-07-21 00:48:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:05,369 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 00:48:05,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:48:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 00:48:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2020-07-21 00:48:05,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:05,388 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 67, 67, 55, 50, 35, 35, 35, 35, 35, 35, 35, 33, 33, 33, 33, 33, 33, 33, 20, 20, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:05,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:05,603 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1939979877, now seen corresponding path program 6 times [2020-07-21 00:48:05,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:05,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356885200] [2020-07-21 00:48:05,604 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 00:48:06,287 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:06,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:48:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25706 backedges. 511 proven. 2289 refuted. 0 times theorem prover too weak. 22906 trivial. 0 not checked. [2020-07-21 00:48:06,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:12,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:13,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:13,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:15,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:15,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:16,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25706 backedges. 511 proven. 2319 refuted. 0 times theorem prover too weak. 22876 trivial. 0 not checked. [2020-07-21 00:48:17,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356885200] [2020-07-21 00:48:17,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:17,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:48:17,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253078668] [2020-07-21 00:48:17,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:48:17,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:48:17,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:48:17,014 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 00:48:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:17,777 INFO L93 Difference]: Finished difference Result 299 states and 1198 transitions. [2020-07-21 00:48:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:48:17,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 934 [2020-07-21 00:48:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:17,787 INFO L225 Difference]: With dead ends: 299 [2020-07-21 00:48:17,787 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 00:48:17,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1875 GetRequests, 1831 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:48:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 00:48:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 150. [2020-07-21 00:48:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 00:48:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 00:48:17,845 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 934 [2020-07-21 00:48:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:17,846 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 00:48:17,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:48:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 00:48:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1121 [2020-07-21 00:48:17,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:17,864 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 77, 77, 69, 66, 43, 43, 43, 43, 43, 43, 43, 38, 38, 38, 38, 38, 38, 38, 28, 26, 20, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:18,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:18,078 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1849137250, now seen corresponding path program 7 times [2020-07-21 00:48:18,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:18,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149346095] [2020-07-21 00:48:18,081 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 00:48:18,743 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:18,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:48:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 37239 backedges. 585 proven. 2878 refuted. 0 times theorem prover too weak. 33776 trivial. 0 not checked. [2020-07-21 00:48:19,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:26,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:26,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:28,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:29,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:29,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 37239 backedges. 587 proven. 2909 refuted. 0 times theorem prover too weak. 33743 trivial. 0 not checked. [2020-07-21 00:48:31,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149346095] [2020-07-21 00:48:31,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:31,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:48:31,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537781635] [2020-07-21 00:48:31,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:48:31,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:48:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:48:31,942 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 00:48:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:32,760 INFO L93 Difference]: Finished difference Result 251 states and 812 transitions. [2020-07-21 00:48:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:48:32,762 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1120 [2020-07-21 00:48:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:32,767 INFO L225 Difference]: With dead ends: 251 [2020-07-21 00:48:32,768 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 00:48:32,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2247 GetRequests, 2203 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 00:48:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 00:48:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 170. [2020-07-21 00:48:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 00:48:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 456 transitions. [2020-07-21 00:48:32,804 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 456 transitions. Word has length 1120 [2020-07-21 00:48:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:32,805 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 456 transitions. [2020-07-21 00:48:32,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:48:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 456 transitions. [2020-07-21 00:48:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2020-07-21 00:48:32,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:32,830 INFO L422 BasicCegarLoop]: trace histogram [103, 103, 92, 92, 72, 69, 51, 51, 51, 51, 51, 51, 51, 46, 46, 46, 46, 46, 46, 46, 31, 26, 23, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:33,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:33,044 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1147462940, now seen corresponding path program 8 times [2020-07-21 00:48:33,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:33,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765459419] [2020-07-21 00:48:33,046 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 00:48:33,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:48:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 51898 backedges. 728 proven. 3822 refuted. 0 times theorem prover too weak. 47348 trivial. 0 not checked. [2020-07-21 00:48:34,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:43,299 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:48:44,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:46,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:46,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51898 backedges. 730 proven. 3860 refuted. 0 times theorem prover too weak. 47308 trivial. 0 not checked. [2020-07-21 00:48:52,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765459419] [2020-07-21 00:48:52,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:52,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:48:52,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519880884] [2020-07-21 00:48:52,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:48:52,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:48:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:48:52,404 INFO L87 Difference]: Start difference. First operand 170 states and 456 transitions. Second operand 23 states. [2020-07-21 00:48:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:53,107 INFO L93 Difference]: Finished difference Result 254 states and 839 transitions. [2020-07-21 00:48:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:48:53,110 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1318 [2020-07-21 00:48:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:53,115 INFO L225 Difference]: With dead ends: 254 [2020-07-21 00:48:53,115 INFO L226 Difference]: Without dead ends: 240 [2020-07-21 00:48:53,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2644 GetRequests, 2595 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 00:48:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-21 00:48:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 166. [2020-07-21 00:48:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 00:48:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 436 transitions. [2020-07-21 00:48:53,153 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 436 transitions. Word has length 1318 [2020-07-21 00:48:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:53,154 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 436 transitions. [2020-07-21 00:48:53,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:48:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 436 transitions. [2020-07-21 00:48:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2020-07-21 00:48:53,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:53,176 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 79, 79, 65, 65, 41, 41, 41, 41, 41, 41, 41, 39, 39, 39, 39, 39, 39, 39, 26, 24, 17, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:53,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:53,392 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash -462615337, now seen corresponding path program 9 times [2020-07-21 00:48:53,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:53,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352072996] [2020-07-21 00:48:53,393 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 00:48:54,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:54,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:48:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36012 backedges. 649 proven. 2690 refuted. 0 times theorem prover too weak. 32673 trivial. 0 not checked. [2020-07-21 00:48:54,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:01,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:03,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:03,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:04,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:05,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:05,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:06,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:06,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:06,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:06,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:06,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36012 backedges. 649 proven. 2722 refuted. 0 times theorem prover too weak. 32641 trivial. 0 not checked. [2020-07-21 00:49:07,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352072996] [2020-07-21 00:49:07,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:07,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:49:07,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4440464] [2020-07-21 00:49:07,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:49:07,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:49:07,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:49:07,487 INFO L87 Difference]: Start difference. First operand 166 states and 436 transitions. Second operand 21 states. [2020-07-21 00:49:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:08,135 INFO L93 Difference]: Finished difference Result 269 states and 930 transitions. [2020-07-21 00:49:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:49:08,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1103 [2020-07-21 00:49:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:08,143 INFO L225 Difference]: With dead ends: 269 [2020-07-21 00:49:08,143 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 00:49:08,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2213 GetRequests, 2169 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 00:49:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 00:49:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-07-21 00:49:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 00:49:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 409 transitions. [2020-07-21 00:49:08,183 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 409 transitions. Word has length 1103 [2020-07-21 00:49:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:08,184 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 409 transitions. [2020-07-21 00:49:08,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:49:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 409 transitions. [2020-07-21 00:49:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1443 [2020-07-21 00:49:08,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:08,216 INFO L422 BasicCegarLoop]: trace histogram [110, 110, 101, 101, 87, 82, 55, 55, 55, 55, 55, 55, 55, 50, 50, 50, 50, 50, 50, 50, 32, 32, 28, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:08,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:08,430 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1255370812, now seen corresponding path program 10 times [2020-07-21 00:49:08,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:08,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237216833] [2020-07-21 00:49:08,433 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 00:49:09,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:09,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:49:09,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 62082 backedges. 688 proven. 3232 refuted. 0 times theorem prover too weak. 58162 trivial. 0 not checked. [2020-07-21 00:49:10,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:18,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:18,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:21,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:23,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:23,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 62082 backedges. 688 proven. 3256 refuted. 0 times theorem prover too weak. 58138 trivial. 0 not checked. [2020-07-21 00:49:24,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237216833] [2020-07-21 00:49:24,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:24,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:49:24,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470416798] [2020-07-21 00:49:24,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:49:24,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:49:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:49:24,461 INFO L87 Difference]: Start difference. First operand 160 states and 409 transitions. Second operand 19 states. [2020-07-21 00:49:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:25,170 INFO L93 Difference]: Finished difference Result 324 states and 1425 transitions. [2020-07-21 00:49:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:49:25,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1442 [2020-07-21 00:49:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:25,190 INFO L225 Difference]: With dead ends: 324 [2020-07-21 00:49:25,190 INFO L226 Difference]: Without dead ends: 310 [2020-07-21 00:49:25,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2890 GetRequests, 2851 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:49:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-21 00:49:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 162. [2020-07-21 00:49:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 00:49:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 422 transitions. [2020-07-21 00:49:25,271 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 422 transitions. Word has length 1442 [2020-07-21 00:49:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:25,272 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 422 transitions. [2020-07-21 00:49:25,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:49:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 422 transitions. [2020-07-21 00:49:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2020-07-21 00:49:25,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:25,304 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 75, 75, 68, 57, 46, 46, 46, 46, 46, 46, 46, 37, 37, 37, 37, 37, 37, 37, 31, 24, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:25,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:25,520 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash -485072896, now seen corresponding path program 11 times [2020-07-21 00:49:25,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:25,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424545673] [2020-07-21 00:49:25,522 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 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 00:49:26,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:26,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:49:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 38522 backedges. 751 proven. 2756 refuted. 0 times theorem prover too weak. 35015 trivial. 0 not checked. [2020-07-21 00:49:27,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:33,163 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 00:49:34,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:36,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:39,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:39,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:39,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:39,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:39,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:39,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38522 backedges. 753 proven. 2787 refuted. 0 times theorem prover too weak. 34982 trivial. 0 not checked. [2020-07-21 00:49:40,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424545673] [2020-07-21 00:49:40,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:40,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:49:40,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071200372] [2020-07-21 00:49:40,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:49:40,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:40,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:49:40,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:49:40,837 INFO L87 Difference]: Start difference. First operand 162 states and 422 transitions. Second operand 21 states. [2020-07-21 00:49:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:41,733 INFO L93 Difference]: Finished difference Result 263 states and 912 transitions. [2020-07-21 00:49:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:49:41,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1134 [2020-07-21 00:49:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:41,743 INFO L225 Difference]: With dead ends: 263 [2020-07-21 00:49:41,743 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 00:49:41,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2275 GetRequests, 2231 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 00:49:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 00:49:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 182. [2020-07-21 00:49:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 00:49:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 527 transitions. [2020-07-21 00:49:41,791 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 527 transitions. Word has length 1134 [2020-07-21 00:49:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:41,792 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 527 transitions. [2020-07-21 00:49:41,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:49:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 527 transitions. [2020-07-21 00:49:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1592 [2020-07-21 00:49:41,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:41,833 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 110, 110, 91, 83, 62, 62, 62, 62, 62, 62, 62, 55, 55, 55, 55, 55, 55, 55, 42, 29, 28, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:42,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:42,047 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash -14080814, now seen corresponding path program 12 times [2020-07-21 00:49:42,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:42,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185498362] [2020-07-21 00:49:42,050 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 00:49:43,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:49:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 75982 backedges. 939 proven. 4687 refuted. 0 times theorem prover too weak. 70356 trivial. 0 not checked. [2020-07-21 00:49:44,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:56,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:02,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:03,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:03,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:04,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:05,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 75982 backedges. 947 proven. 4719 refuted. 0 times theorem prover too weak. 70316 trivial. 0 not checked. [2020-07-21 00:50:06,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185498362] [2020-07-21 00:50:06,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:06,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:50:06,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907316513] [2020-07-21 00:50:06,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:50:06,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:50:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:50:06,315 INFO L87 Difference]: Start difference. First operand 182 states and 527 transitions. Second operand 23 states. [2020-07-21 00:50:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:07,496 INFO L93 Difference]: Finished difference Result 308 states and 1146 transitions. [2020-07-21 00:50:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:50:07,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1591 [2020-07-21 00:50:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:07,504 INFO L225 Difference]: With dead ends: 308 [2020-07-21 00:50:07,504 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 00:50:07,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3190 GetRequests, 3141 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:50:07,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 00:50:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2020-07-21 00:50:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-21 00:50:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 624 transitions. [2020-07-21 00:50:07,542 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 624 transitions. Word has length 1591 [2020-07-21 00:50:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:07,543 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 624 transitions. [2020-07-21 00:50:07,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:50:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 624 transitions. [2020-07-21 00:50:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1164 [2020-07-21 00:50:07,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:07,563 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 84, 84, 65, 65, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 23, 22, 22, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:07,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:07,779 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1199306388, now seen corresponding path program 13 times [2020-07-21 00:50:07,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:07,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242774718] [2020-07-21 00:50:07,780 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 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 00:50:08,603 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:50:08,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40124 backedges. 912 proven. 3559 refuted. 0 times theorem prover too weak. 35653 trivial. 0 not checked. [2020-07-21 00:50:09,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:12,622 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:50:18,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:22,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:27,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:28,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:30,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 40124 backedges. 916 proven. 3607 refuted. 0 times theorem prover too weak. 35601 trivial. 0 not checked. [2020-07-21 00:50:30,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242774718] [2020-07-21 00:50:30,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:30,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:50:30,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385335118] [2020-07-21 00:50:30,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:50:30,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:50:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:50:30,975 INFO L87 Difference]: Start difference. First operand 211 states and 624 transitions. Second operand 25 states. [2020-07-21 00:50:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:32,507 INFO L93 Difference]: Finished difference Result 318 states and 1199 transitions. [2020-07-21 00:50:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:50:32,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1163 [2020-07-21 00:50:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:32,515 INFO L225 Difference]: With dead ends: 318 [2020-07-21 00:50:32,515 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 00:50:32,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2335 GetRequests, 2281 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:50:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 00:50:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 215. [2020-07-21 00:50:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 00:50:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 668 transitions. [2020-07-21 00:50:32,555 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 668 transitions. Word has length 1163 [2020-07-21 00:50:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:32,556 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 668 transitions. [2020-07-21 00:50:32,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:50:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 668 transitions. [2020-07-21 00:50:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1163 [2020-07-21 00:50:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:32,576 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 82, 82, 65, 64, 44, 44, 44, 44, 44, 44, 44, 41, 41, 41, 41, 41, 41, 41, 24, 24, 20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:32,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:32,790 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2052854340, now seen corresponding path program 14 times [2020-07-21 00:50:32,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:32,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936310358] [2020-07-21 00:50:32,792 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 00:50:33,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:33,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:50:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40108 backedges. 653 proven. 2865 refuted. 0 times theorem prover too weak. 36590 trivial. 0 not checked. [2020-07-21 00:50:34,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:44,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:44,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:49,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:51,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:51,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 40108 backedges. 655 proven. 2893 refuted. 0 times theorem prover too weak. 36560 trivial. 0 not checked. [2020-07-21 00:50:52,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936310358] [2020-07-21 00:50:52,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:52,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:50:52,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593630831] [2020-07-21 00:50:52,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:50:52,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:50:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:50:52,188 INFO L87 Difference]: Start difference. First operand 215 states and 668 transitions. Second operand 21 states. [2020-07-21 00:50:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:53,140 INFO L93 Difference]: Finished difference Result 320 states and 1205 transitions. [2020-07-21 00:50:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:50:53,143 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1162 [2020-07-21 00:50:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:53,149 INFO L225 Difference]: With dead ends: 320 [2020-07-21 00:50:53,149 INFO L226 Difference]: Without dead ends: 306 [2020-07-21 00:50:53,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 2287 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:50:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-21 00:50:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 216. [2020-07-21 00:50:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 00:50:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 668 transitions. [2020-07-21 00:50:53,195 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 668 transitions. Word has length 1162 [2020-07-21 00:50:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:53,196 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 668 transitions. [2020-07-21 00:50:53,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:50:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 668 transitions. [2020-07-21 00:50:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2049 [2020-07-21 00:50:53,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:53,239 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 140, 140, 113, 110, 81, 81, 81, 81, 81, 81, 81, 70, 70, 70, 70, 70, 70, 70, 50, 43, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:53,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:53,453 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1320243700, now seen corresponding path program 15 times [2020-07-21 00:50:53,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:53,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530508427] [2020-07-21 00:50:53,456 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 00:50:54,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:50:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 126675 backedges. 1183 proven. 6035 refuted. 0 times theorem prover too weak. 119457 trivial. 0 not checked. [2020-07-21 00:50:56,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:01,060 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:51:15,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:21,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:25,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:25,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:25,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:26,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 126675 backedges. 1187 proven. 6071 refuted. 0 times theorem prover too weak. 119417 trivial. 0 not checked. [2020-07-21 00:51:29,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530508427] [2020-07-21 00:51:29,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:29,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:51:29,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143721788] [2020-07-21 00:51:29,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:51:29,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:51:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:29,172 INFO L87 Difference]: Start difference. First operand 216 states and 668 transitions. Second operand 23 states. [2020-07-21 00:51:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:30,113 INFO L93 Difference]: Finished difference Result 293 states and 1058 transitions. [2020-07-21 00:51:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:51:30,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 2048 [2020-07-21 00:51:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:30,126 INFO L225 Difference]: With dead ends: 293 [2020-07-21 00:51:30,126 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 00:51:30,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4104 GetRequests, 4055 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:51:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 00:51:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 209. [2020-07-21 00:51:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-21 00:51:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 628 transitions. [2020-07-21 00:51:30,177 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 628 transitions. Word has length 2048 [2020-07-21 00:51:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:30,178 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 628 transitions. [2020-07-21 00:51:30,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:51:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 628 transitions. [2020-07-21 00:51:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2020-07-21 00:51:30,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:30,200 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 81, 81, 67, 64, 42, 42, 42, 42, 42, 42, 42, 40, 40, 40, 40, 40, 40, 40, 27, 22, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:30,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:30,416 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 329808029, now seen corresponding path program 16 times [2020-07-21 00:51:30,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:30,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181996681] [2020-07-21 00:51:30,418 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 00:51:31,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:31,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:51:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 37695 backedges. 1075 proven. 3263 refuted. 0 times theorem prover too weak. 33357 trivial. 0 not checked. [2020-07-21 00:51:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:35,582 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:51:35,685 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:51:38,010 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:51:42,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:46,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:46,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:48,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:52,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:52,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:52,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:52,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:52,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37695 backedges. 1077 proven. 3313 refuted. 0 times theorem prover too weak. 33305 trivial. 0 not checked. [2020-07-21 00:51:54,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181996681] [2020-07-21 00:51:54,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:54,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:51:54,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340969263] [2020-07-21 00:51:54,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:51:54,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:54,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:51:54,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:54,227 INFO L87 Difference]: Start difference. First operand 209 states and 628 transitions. Second operand 25 states. [2020-07-21 00:51:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:55,986 INFO L93 Difference]: Finished difference Result 303 states and 1021 transitions. [2020-07-21 00:51:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:51:55,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1128 [2020-07-21 00:51:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:55,996 INFO L225 Difference]: With dead ends: 303 [2020-07-21 00:51:55,996 INFO L226 Difference]: Without dead ends: 257 [2020-07-21 00:51:56,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2265 GetRequests, 2211 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:51:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-21 00:51:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 248. [2020-07-21 00:51:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-21 00:51:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 722 transitions. [2020-07-21 00:51:56,039 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 722 transitions. Word has length 1128 [2020-07-21 00:51:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:56,039 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 722 transitions. [2020-07-21 00:51:56,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:51:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 722 transitions. [2020-07-21 00:51:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-21 00:51:56,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:56,059 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 58, 58, 50, 47, 31, 31, 31, 31, 31, 31, 31, 29, 29, 29, 29, 29, 29, 29, 21, 16, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:56,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:56,274 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1582221189, now seen corresponding path program 17 times [2020-07-21 00:51:56,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:56,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495644075] [2020-07-21 00:51:56,276 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 00:51:57,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:51:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20214 backedges. 690 proven. 1769 refuted. 0 times theorem prover too weak. 17755 trivial. 0 not checked. [2020-07-21 00:51:57,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:04,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:09,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:10,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:10,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:10,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:10,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20214 backedges. 692 proven. 1797 refuted. 0 times theorem prover too weak. 17725 trivial. 0 not checked. [2020-07-21 00:52:11,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495644075] [2020-07-21 00:52:11,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:11,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:52:11,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201643871] [2020-07-21 00:52:11,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:52:11,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:52:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:52:11,775 INFO L87 Difference]: Start difference. First operand 248 states and 722 transitions. Second operand 21 states. [2020-07-21 00:52:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:12,723 INFO L93 Difference]: Finished difference Result 400 states and 1594 transitions. [2020-07-21 00:52:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:52:12,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 830 [2020-07-21 00:52:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:12,737 INFO L225 Difference]: With dead ends: 400 [2020-07-21 00:52:12,737 INFO L226 Difference]: Without dead ends: 383 [2020-07-21 00:52:12,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1667 GetRequests, 1623 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 00:52:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-21 00:52:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 238. [2020-07-21 00:52:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 00:52:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 653 transitions. [2020-07-21 00:52:12,800 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 653 transitions. Word has length 830 [2020-07-21 00:52:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:12,801 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 653 transitions. [2020-07-21 00:52:12,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:52:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 653 transitions. [2020-07-21 00:52:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1199 [2020-07-21 00:52:12,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:12,820 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 86, 86, 71, 70, 44, 44, 44, 44, 44, 44, 44, 43, 43, 43, 43, 43, 43, 43, 28, 26, 18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:13,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:13,021 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -424998, now seen corresponding path program 18 times [2020-07-21 00:52:13,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:13,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063976659] [2020-07-21 00:52:13,023 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 00:52:14,147 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:52:14,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42580 backedges. 729 proven. 2513 refuted. 0 times theorem prover too weak. 39338 trivial. 0 not checked. [2020-07-21 00:52:15,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:25,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:25,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:28,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:28,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:30,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:30,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:30,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:31,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:31,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:31,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:32,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42580 backedges. 729 proven. 2539 refuted. 0 times theorem prover too weak. 39312 trivial. 0 not checked. [2020-07-21 00:52:33,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063976659] [2020-07-21 00:52:33,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:33,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:52:33,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440941590] [2020-07-21 00:52:33,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:52:33,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:52:33,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:52:33,590 INFO L87 Difference]: Start difference. First operand 238 states and 653 transitions. Second operand 19 states. [2020-07-21 00:52:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:34,706 INFO L93 Difference]: Finished difference Result 489 states and 2374 transitions. [2020-07-21 00:52:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:52:34,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1198 [2020-07-21 00:52:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:34,725 INFO L225 Difference]: With dead ends: 489 [2020-07-21 00:52:34,725 INFO L226 Difference]: Without dead ends: 472 [2020-07-21 00:52:34,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2402 GetRequests, 2363 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 00:52:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-21 00:52:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 240. [2020-07-21 00:52:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-21 00:52:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 667 transitions. [2020-07-21 00:52:34,817 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 667 transitions. Word has length 1198 [2020-07-21 00:52:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:34,817 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 667 transitions. [2020-07-21 00:52:34,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:52:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 667 transitions. [2020-07-21 00:52:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1295 [2020-07-21 00:52:34,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:34,845 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 91, 91, 78, 75, 49, 49, 49, 49, 49, 49, 49, 45, 45, 45, 45, 45, 45, 45, 33, 26, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:35,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:35,061 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:35,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1605483095, now seen corresponding path program 19 times [2020-07-21 00:52:35,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:35,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064010237] [2020-07-21 00:52:35,063 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 00:52:36,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:36,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:52:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49834 backedges. 983 proven. 3209 refuted. 0 times theorem prover too weak. 45642 trivial. 0 not checked. [2020-07-21 00:52:37,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:41,398 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:52:41,523 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:52:51,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:51,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:59,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:59,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:01,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:02,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:03,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:04,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:04,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:04,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:04,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49834 backedges. 993 proven. 3231 refuted. 0 times theorem prover too weak. 45610 trivial. 0 not checked. [2020-07-21 00:53:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064010237] [2020-07-21 00:53:06,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:06,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:53:06,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201766395] [2020-07-21 00:53:06,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:53:06,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:53:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:53:06,656 INFO L87 Difference]: Start difference. First operand 240 states and 667 transitions. Second operand 21 states. [2020-07-21 00:53:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:08,002 INFO L93 Difference]: Finished difference Result 428 states and 1691 transitions. [2020-07-21 00:53:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:53:08,007 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1294 [2020-07-21 00:53:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:08,019 INFO L225 Difference]: With dead ends: 428 [2020-07-21 00:53:08,020 INFO L226 Difference]: Without dead ends: 382 [2020-07-21 00:53:08,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2595 GetRequests, 2551 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:53:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-07-21 00:53:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 266. [2020-07-21 00:53:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-21 00:53:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 797 transitions. [2020-07-21 00:53:08,091 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 797 transitions. Word has length 1294 [2020-07-21 00:53:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:08,092 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 797 transitions. [2020-07-21 00:53:08,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:53:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 797 transitions. [2020-07-21 00:53:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1205 [2020-07-21 00:53:08,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:08,119 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 87, 87, 68, 67, 45, 45, 45, 45, 45, 45, 45, 43, 43, 43, 43, 43, 43, 43, 25, 22, 22, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:08,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:08,333 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1383458389, now seen corresponding path program 20 times [2020-07-21 00:53:08,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:08,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899978561] [2020-07-21 00:53:08,335 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 00:53:09,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:53:09,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:09,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:53:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 43045 backedges. 771 proven. 2953 refuted. 0 times theorem prover too weak. 39321 trivial. 0 not checked. [2020-07-21 00:53:11,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:25,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:31,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:31,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:34,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:34,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:36,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:36,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:36,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:36,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:37,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:53:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 43045 backedges. 783 proven. 2973 refuted. 0 times theorem prover too weak. 39289 trivial. 0 not checked. [2020-07-21 00:53:39,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899978561] [2020-07-21 00:53:39,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:53:39,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:53:39,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182211591] [2020-07-21 00:53:39,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:53:39,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:53:39,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:53:39,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:53:39,247 INFO L87 Difference]: Start difference. First operand 266 states and 797 transitions. Second operand 21 states. [2020-07-21 00:53:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:53:40,748 INFO L93 Difference]: Finished difference Result 384 states and 1364 transitions. [2020-07-21 00:53:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:53:40,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1204 [2020-07-21 00:53:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:53:40,765 INFO L225 Difference]: With dead ends: 384 [2020-07-21 00:53:40,765 INFO L226 Difference]: Without dead ends: 323 [2020-07-21 00:53:40,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2415 GetRequests, 2371 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:53:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-07-21 00:53:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 245. [2020-07-21 00:53:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-07-21 00:53:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 675 transitions. [2020-07-21 00:53:40,811 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 675 transitions. Word has length 1204 [2020-07-21 00:53:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:53:40,811 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 675 transitions. [2020-07-21 00:53:40,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:53:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 675 transitions. [2020-07-21 00:53:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1089 [2020-07-21 00:53:40,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:53:40,825 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 64, 63, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 24, 24, 17, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:53:41,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:53:41,026 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:53:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:53:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 941360514, now seen corresponding path program 21 times [2020-07-21 00:53:41,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:53:41,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800934560] [2020-07-21 00:53:41,029 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 00:53:42,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:53:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:53:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:53:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:53:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 35017 backedges. 930 proven. 2825 refuted. 0 times theorem prover too weak. 31262 trivial. 0 not checked. [2020-07-21 00:53:42,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:53:45,971 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:47,055 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:53:47,174 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:53:47,293 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:53:47,414 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:53:47,541 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:53:47,655 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 00:53:47,760 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:53:57,875 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:53:57,978 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:53:58,572 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:58,684 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:53:58,806 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:58,926 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:53:59,043 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:53:59,151 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:53:59,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:03,847 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:03,952 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:04,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:04,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:07,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:09,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:09,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:09,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:10,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:10,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:10,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:11,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:11,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:11,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:11,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:12,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 35017 backedges. 936 proven. 2865 refuted. 0 times theorem prover too weak. 31216 trivial. 0 not checked. [2020-07-21 00:54:14,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800934560] [2020-07-21 00:54:14,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:14,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 00:54:14,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256035875] [2020-07-21 00:54:14,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:54:14,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:14,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:54:14,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:54:14,062 INFO L87 Difference]: Start difference. First operand 245 states and 675 transitions. Second operand 24 states. [2020-07-21 00:54:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:15,972 INFO L93 Difference]: Finished difference Result 507 states and 2268 transitions. [2020-07-21 00:54:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:54:15,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1088 [2020-07-21 00:54:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:15,991 INFO L225 Difference]: With dead ends: 507 [2020-07-21 00:54:15,991 INFO L226 Difference]: Without dead ends: 464 [2020-07-21 00:54:15,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2184 GetRequests, 2135 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:54:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-07-21 00:54:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 250. [2020-07-21 00:54:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-21 00:54:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 706 transitions. [2020-07-21 00:54:16,048 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 706 transitions. Word has length 1088 [2020-07-21 00:54:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:16,049 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 706 transitions. [2020-07-21 00:54:16,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:54:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 706 transitions. [2020-07-21 00:54:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1148 [2020-07-21 00:54:16,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:16,075 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 71, 67, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 29, 26, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:16,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:16,291 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash 225615650, now seen corresponding path program 22 times [2020-07-21 00:54:16,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:16,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643279012] [2020-07-21 00:54:16,293 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 00:54:17,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:54:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:54:17,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38976 backedges. 720 proven. 3264 refuted. 0 times theorem prover too weak. 34992 trivial. 0 not checked. [2020-07-21 00:54:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:54:21,121 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:21,225 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:22,228 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:54:22,340 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:54:22,468 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:54:22,585 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:54:23,492 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:54:23,623 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:54:23,764 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:54:23,903 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:54:24,038 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:54:24,160 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 00:54:24,276 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:54:24,386 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:54:24,489 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:54:30,611 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:30,714 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:31,772 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:54:31,881 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:54:32,004 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:54:32,129 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:54:32,253 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:54:32,367 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:54:32,471 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:54:32,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:40,310 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:40,421 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:54:40,528 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:54:40,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:40,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:47,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:47,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:49,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:49,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:50,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:51,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:51,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:52,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:52,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:52,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:54:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 38976 backedges. 732 proven. 3292 refuted. 0 times theorem prover too weak. 34952 trivial. 0 not checked. [2020-07-21 00:54:53,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643279012] [2020-07-21 00:54:53,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:54:53,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:54:53,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510356734] [2020-07-21 00:54:53,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:54:53,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:54:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:54:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:54:53,180 INFO L87 Difference]: Start difference. First operand 250 states and 706 transitions. Second operand 23 states. [2020-07-21 00:54:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:54:55,210 INFO L93 Difference]: Finished difference Result 675 states and 3741 transitions. [2020-07-21 00:54:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:54:55,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1147 [2020-07-21 00:54:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:54:55,230 INFO L225 Difference]: With dead ends: 675 [2020-07-21 00:54:55,230 INFO L226 Difference]: Without dead ends: 429 [2020-07-21 00:54:55,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2302 GetRequests, 2253 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:54:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-07-21 00:54:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 250. [2020-07-21 00:54:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-21 00:54:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 706 transitions. [2020-07-21 00:54:55,312 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 706 transitions. Word has length 1147 [2020-07-21 00:54:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:54:55,313 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 706 transitions. [2020-07-21 00:54:55,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:54:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 706 transitions. [2020-07-21 00:54:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2020-07-21 00:54:55,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:54:55,337 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 78, 78, 64, 63, 41, 41, 41, 41, 41, 41, 41, 39, 39, 39, 39, 39, 39, 39, 24, 23, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:54:55,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:54:55,552 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:54:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:54:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1747137833, now seen corresponding path program 23 times [2020-07-21 00:54:55,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:54:55,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748278912] [2020-07-21 00:54:55,555 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 00:54:56,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:54:56,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:54:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:54:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:54:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35837 backedges. 985 proven. 2825 refuted. 0 times theorem prover too weak. 32027 trivial. 0 not checked. [2020-07-21 00:54:57,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:01,618 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:55:01,744 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:55:01,878 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:55:02,011 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:55:02,138 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:55:02,258 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 00:55:02,369 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:55:02,474 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:55:10,506 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:55:11,023 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:55:11,133 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:55:11,251 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:55:11,369 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:55:11,483 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:55:11,587 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:55:12,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:12,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:15,848 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:55:16,048 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:55:16,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:16,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:21,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:21,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:22,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:22,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:23,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:23,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:23,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:24,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:24,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:24,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:25,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 35837 backedges. 989 proven. 2863 refuted. 0 times theorem prover too weak. 31985 trivial. 0 not checked. [2020-07-21 00:55:27,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748278912] [2020-07-21 00:55:27,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:27,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:55:27,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155525110] [2020-07-21 00:55:27,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:55:27,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:55:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:55:27,104 INFO L87 Difference]: Start difference. First operand 250 states and 706 transitions. Second operand 23 states. [2020-07-21 00:55:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:29,108 INFO L93 Difference]: Finished difference Result 410 states and 1512 transitions. [2020-07-21 00:55:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:55:29,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1100 [2020-07-21 00:55:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:29,123 INFO L225 Difference]: With dead ends: 410 [2020-07-21 00:55:29,123 INFO L226 Difference]: Without dead ends: 367 [2020-07-21 00:55:29,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2208 GetRequests, 2159 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 00:55:29,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-07-21 00:55:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 233. [2020-07-21 00:55:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 00:55:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 649 transitions. [2020-07-21 00:55:29,177 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 649 transitions. Word has length 1100 [2020-07-21 00:55:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:29,178 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 649 transitions. [2020-07-21 00:55:29,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:55:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 649 transitions. [2020-07-21 00:55:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1045 [2020-07-21 00:55:29,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:29,198 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 60, 59, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 22, 21, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:29,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:29,411 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:29,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1830240593, now seen corresponding path program 24 times [2020-07-21 00:55:29,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:29,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517187466] [2020-07-21 00:55:29,413 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 00:55:30,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:55:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:55:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:55:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 32209 backedges. 850 proven. 2295 refuted. 0 times theorem prover too weak. 29064 trivial. 0 not checked. [2020-07-21 00:55:31,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:55:42,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:47,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:47,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:52,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:52,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:52,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:53,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:53,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:53,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:53,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:54,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:54,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:54,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:54,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:55:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32209 backedges. 850 proven. 2327 refuted. 0 times theorem prover too weak. 29032 trivial. 0 not checked. [2020-07-21 00:55:56,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517187466] [2020-07-21 00:55:56,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:55:56,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:55:56,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140124465] [2020-07-21 00:55:56,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:55:56,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:55:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:55:56,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:55:56,826 INFO L87 Difference]: Start difference. First operand 233 states and 649 transitions. Second operand 21 states. [2020-07-21 00:55:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:55:58,230 INFO L93 Difference]: Finished difference Result 347 states and 1206 transitions. [2020-07-21 00:55:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:55:58,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1044 [2020-07-21 00:55:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:55:58,244 INFO L225 Difference]: With dead ends: 347 [2020-07-21 00:55:58,244 INFO L226 Difference]: Without dead ends: 330 [2020-07-21 00:55:58,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2095 GetRequests, 2051 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 00:55:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-21 00:55:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 222. [2020-07-21 00:55:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-21 00:55:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 598 transitions. [2020-07-21 00:55:58,281 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 598 transitions. Word has length 1044 [2020-07-21 00:55:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:55:58,282 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 598 transitions. [2020-07-21 00:55:58,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:55:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 598 transitions. [2020-07-21 00:55:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2020-07-21 00:55:58,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:55:58,298 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 81, 81, 69, 62, 44, 44, 44, 44, 44, 44, 44, 40, 40, 40, 40, 40, 40, 40, 29, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:55:58,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:55:58,499 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:55:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:55:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1284174865, now seen corresponding path program 25 times [2020-07-21 00:55:58,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:55:58,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824381060] [2020-07-21 00:55:58,501 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 00:55:59,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:55:59,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:55:59,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:55:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:56:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 39413 backedges. 944 proven. 2553 refuted. 0 times theorem prover too weak. 35916 trivial. 0 not checked. [2020-07-21 00:56:00,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:56:05,243 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:56:05,443 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:56:05,565 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:56:05,685 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:56:05,796 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:56:13,199 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:56:13,303 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:56:13,414 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:56:13,526 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:56:14,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:14,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:20,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:25,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:25,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:25,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:25,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:26,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:26,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:26,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:26,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:26,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:26,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:27,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:27,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39413 backedges. 948 proven. 2579 refuted. 0 times theorem prover too weak. 35886 trivial. 0 not checked. [2020-07-21 00:56:29,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824381060] [2020-07-21 00:56:29,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:56:29,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:56:29,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272396587] [2020-07-21 00:56:29,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:56:29,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:56:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:56:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:56:29,194 INFO L87 Difference]: Start difference. First operand 222 states and 598 transitions. Second operand 21 states. [2020-07-21 00:56:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:56:30,460 INFO L93 Difference]: Finished difference Result 308 states and 944 transitions. [2020-07-21 00:56:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:56:30,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1152 [2020-07-21 00:56:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:56:30,472 INFO L225 Difference]: With dead ends: 308 [2020-07-21 00:56:30,472 INFO L226 Difference]: Without dead ends: 288 [2020-07-21 00:56:30,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2311 GetRequests, 2267 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:56:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-07-21 00:56:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 222. [2020-07-21 00:56:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-21 00:56:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 572 transitions. [2020-07-21 00:56:30,505 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 572 transitions. Word has length 1152 [2020-07-21 00:56:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:56:30,505 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 572 transitions. [2020-07-21 00:56:30,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:56:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 572 transitions. [2020-07-21 00:56:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1115 [2020-07-21 00:56:30,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:56:30,519 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 77, 77, 68, 61, 43, 43, 43, 43, 43, 43, 43, 38, 38, 38, 38, 38, 38, 38, 30, 18, 18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:56:30,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:56:30,720 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:56:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:56:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1406008794, now seen corresponding path program 26 times [2020-07-21 00:56:30,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:56:30,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103612394] [2020-07-21 00:56:30,722 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 00:56:32,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:56:32,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:56:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:56:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:56:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36856 backedges. 1014 proven. 2826 refuted. 0 times theorem prover too weak. 33016 trivial. 0 not checked. [2020-07-21 00:56:33,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:56:35,516 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:35,621 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:36,198 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:56:36,395 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:56:36,513 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:56:37,731 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:56:37,863 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:56:37,999 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:56:38,114 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:56:38,228 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:56:38,353 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 00:56:38,469 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:56:38,575 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:56:47,175 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:47,279 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:47,871 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:56:47,978 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:56:48,188 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:56:48,304 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:56:48,413 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:56:48,518 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:56:48,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:49,934 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:56:53,538 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:53,647 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:56:54,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:54,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:57,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:58,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:58,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:56:59,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:00,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:00,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:00,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:00,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:00,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:00,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:01,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:01,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36856 backedges. 1020 proven. 2860 refuted. 0 times theorem prover too weak. 32976 trivial. 0 not checked. [2020-07-21 00:57:03,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103612394] [2020-07-21 00:57:03,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:57:03,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:57:03,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370660677] [2020-07-21 00:57:03,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:57:03,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:57:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:57:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:57:03,153 INFO L87 Difference]: Start difference. First operand 222 states and 572 transitions. Second operand 23 states. [2020-07-21 00:57:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:57:05,066 INFO L93 Difference]: Finished difference Result 329 states and 951 transitions. [2020-07-21 00:57:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:57:05,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1114 [2020-07-21 00:57:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:57:05,077 INFO L225 Difference]: With dead ends: 329 [2020-07-21 00:57:05,077 INFO L226 Difference]: Without dead ends: 283 [2020-07-21 00:57:05,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2187 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:57:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-21 00:57:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 241. [2020-07-21 00:57:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-07-21 00:57:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 680 transitions. [2020-07-21 00:57:05,108 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 680 transitions. Word has length 1114 [2020-07-21 00:57:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:57:05,108 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 680 transitions. [2020-07-21 00:57:05,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:57:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 680 transitions. [2020-07-21 00:57:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-07-21 00:57:05,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:57:05,122 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 79, 79, 66, 60, 42, 42, 42, 42, 42, 42, 42, 39, 39, 39, 39, 39, 39, 39, 27, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:57:05,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:57:05,323 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:57:05,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:57:05,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1954449538, now seen corresponding path program 27 times [2020-07-21 00:57:05,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:57:05,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960266770] [2020-07-21 00:57:05,325 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 00:57:06,938 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:57:06,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:57:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:57:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:57:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36591 backedges. 845 proven. 2078 refuted. 0 times theorem prover too weak. 33668 trivial. 0 not checked. [2020-07-21 00:57:07,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:57:12,037 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:12,151 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 00:57:12,262 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 00:57:12,371 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:57:19,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:25,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:25,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:30,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:30,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:31,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:31,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:31,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:32,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:32,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:32,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:33,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:57:33,577 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:57:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36591 backedges. 845 proven. 2101 refuted. 0 times theorem prover too weak. 33645 trivial. 0 not checked. [2020-07-21 00:57:35,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960266770] [2020-07-21 00:57:35,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:57:35,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 00:57:35,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061820607] [2020-07-21 00:57:35,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:57:35,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:57:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:57:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:57:35,478 INFO L87 Difference]: Start difference. First operand 241 states and 680 transitions. Second operand 19 states. [2020-07-21 00:57:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:57:36,794 INFO L93 Difference]: Finished difference Result 327 states and 1025 transitions. [2020-07-21 00:57:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:57:36,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1111 [2020-07-21 00:57:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:57:36,808 INFO L225 Difference]: With dead ends: 327 [2020-07-21 00:57:36,808 INFO L226 Difference]: Without dead ends: 309 [2020-07-21 00:57:36,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2228 GetRequests, 2189 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:57:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-07-21 00:57:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 232. [2020-07-21 00:57:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 00:57:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 630 transitions. [2020-07-21 00:57:36,840 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 630 transitions. Word has length 1111 [2020-07-21 00:57:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:57:36,840 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 630 transitions. [2020-07-21 00:57:36,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:57:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 630 transitions. [2020-07-21 00:57:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1292 [2020-07-21 00:57:36,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:57:36,858 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 93, 93, 76, 74, 48, 48, 48, 48, 48, 48, 48, 46, 46, 46, 46, 46, 46, 46, 30, 26, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:57:37,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:57:37,061 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:57:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:57:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2093754191, now seen corresponding path program 28 times [2020-07-21 00:57:37,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:57:37,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495648832] [2020-07-21 00:57:37,063 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 00:57:38,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:57:38,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:57:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:57:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:57:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49555 backedges. 1054 proven. 2957 refuted. 0 times theorem prover too weak. 45544 trivial. 0 not checked. [2020-07-21 00:57:39,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:57:42,919 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:43,025 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:43,142 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:57:43,258 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:57:45,085 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:57:45,203 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:57:45,334 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:57:45,460 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:57:45,586 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:57:45,698 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:57:45,802 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:57:57,675 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:57:58,652 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:58,764 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:57:58,880 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:57:58,998 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:57:59,112 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:57:59,215 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:57:59,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:05,567 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 00:58:06,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:07,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:07,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:08,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:08,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:09,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:09,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:10,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:11,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49555 backedges. 1058 proven. 2986 refuted. 0 times theorem prover too weak. 45511 trivial. 0 not checked. [2020-07-21 00:58:14,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495648832] [2020-07-21 00:58:14,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:58:14,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 00:58:14,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494938100] [2020-07-21 00:58:14,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:58:14,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:58:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:58:14,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:58:14,953 INFO L87 Difference]: Start difference. First operand 232 states and 630 transitions. Second operand 21 states. [2020-07-21 00:58:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:58:16,562 INFO L93 Difference]: Finished difference Result 366 states and 1330 transitions. [2020-07-21 00:58:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:58:16,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1291 [2020-07-21 00:58:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:58:16,579 INFO L225 Difference]: With dead ends: 366 [2020-07-21 00:58:16,579 INFO L226 Difference]: Without dead ends: 357 [2020-07-21 00:58:16,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2589 GetRequests, 2545 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:58:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-07-21 00:58:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 284. [2020-07-21 00:58:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-21 00:58:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 931 transitions. [2020-07-21 00:58:16,632 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 931 transitions. Word has length 1291 [2020-07-21 00:58:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:58:16,633 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 931 transitions. [2020-07-21 00:58:16,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:58:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 931 transitions. [2020-07-21 00:58:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1380 [2020-07-21 00:58:16,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:58:16,654 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 101, 101, 79, 75, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 29, 26, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:58:16,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:58:16,855 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:58:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:58:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1903085320, now seen corresponding path program 29 times [2020-07-21 00:58:16,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:58:16,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224923973] [2020-07-21 00:58:16,857 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:58:18,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:58:18,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:58:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:58:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:58:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 56660 backedges. 1224 proven. 3532 refuted. 0 times theorem prover too weak. 51904 trivial. 0 not checked. [2020-07-21 00:58:19,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:58:22,374 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:22,481 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:22,599 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:22,713 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:58:22,840 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:22,966 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:24,345 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:24,473 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:24,607 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:58:24,743 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:58:26,519 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:58:26,667 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:58:26,827 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:58:26,980 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:58:27,134 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 00:58:27,274 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 00:58:27,403 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:58:27,527 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:58:27,641 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:58:27,747 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:58:40,576 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:42,224 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:42,365 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:58:42,519 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:58:42,666 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:58:42,804 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 00:58:42,934 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:58:43,053 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:58:43,170 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:58:43,276 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:58:43,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:55,035 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:55,147 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:58:55,256 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:58:55,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:57,429 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:57,535 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:58:57,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:59,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:59,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:58:59,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:00,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:00,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:00,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:00,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:00,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:00,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:01,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:59:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 56660 backedges. 1228 proven. 3568 refuted. 0 times theorem prover too weak. 51864 trivial. 0 not checked. [2020-07-21 00:59:04,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224923973] [2020-07-21 00:59:04,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:04,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 00:59:04,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983638630] [2020-07-21 00:59:04,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:59:04,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:59:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:59:04,727 INFO L87 Difference]: Start difference. First operand 284 states and 931 transitions. Second operand 23 states.