/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:17:38,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:17:38,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:17:38,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:17:38,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:17:38,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:17:38,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:17:38,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:17:38,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:17:38,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:17:38,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:17:38,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:17:38,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:17:38,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:17:38,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:17:38,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:17:38,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:17:38,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:17:38,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:17:38,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:17:38,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:17:38,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:17:38,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:17:38,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:17:38,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:17:38,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:17:38,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:17:38,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:17:38,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:17:38,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:17:38,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:17:38,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:17:38,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:17:38,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:17:38,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:17:38,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:17:38,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:17:38,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:17:38,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:17:38,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:17:38,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:17:38,704 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 19:17:38,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:17:38,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:17:38,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:17:38,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:17:38,736 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:17:38,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:17:38,737 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:17:38,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:17:38,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:17:38,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:17:38,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:17:38,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:17:38,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:17:38,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:17:38,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:17:38,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:17:38,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:17:38,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:17:38,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:17:38,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:17:38,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:17:38,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:17:38,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:17:38,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:17:38,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:17:38,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:17:38,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:38,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:17:38,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:17:38,742 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 -> DAGSIZE 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 -> 2 [2020-07-21 19:17:39,016 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:17:39,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:17:39,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:17:39,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:17:39,033 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:17:39,033 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 19:17:39,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82696efcb/3e869bf5fc5d4fd78d356557b9006342/FLAGcdc90afd2 [2020-07-21 19:17:39,547 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:17:39,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 19:17:39,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82696efcb/3e869bf5fc5d4fd78d356557b9006342/FLAGcdc90afd2 [2020-07-21 19:17:39,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82696efcb/3e869bf5fc5d4fd78d356557b9006342 [2020-07-21 19:17:39,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:17:39,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:17:39,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:17:39,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:17:39,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:17:39,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:17:39" (1/1) ... [2020-07-21 19:17:40,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1941cf0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40, skipping insertion in model container [2020-07-21 19:17:40,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:17:39" (1/1) ... [2020-07-21 19:17:40,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:17:40,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:17:40,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:17:40,225 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:17:40,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:17:40,259 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:17:40,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40 WrapperNode [2020-07-21 19:17:40,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:17:40,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:17:40,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:17:40,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:17:40,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (1/1) ... [2020-07-21 19:17:40,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:17:40,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:17:40,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:17:40,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:17:40,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (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 19:17:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:17:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:17:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 19:17:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-21 19:17:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:17:40,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:17:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:17:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 19:17:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-21 19:17:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:17:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:17:40,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:17:40,626 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:17:40,626 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:17:40,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:17:40 BoogieIcfgContainer [2020-07-21 19:17:40,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:17:40,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:17:40,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:17:40,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:17:40,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:17:39" (1/3) ... [2020-07-21 19:17:40,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce53b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:17:40, skipping insertion in model container [2020-07-21 19:17:40,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:40" (2/3) ... [2020-07-21 19:17:40,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce53b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:17:40, skipping insertion in model container [2020-07-21 19:17:40,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:17:40" (3/3) ... [2020-07-21 19:17:40,638 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-21 19:17:40,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:17:40,655 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:17:40,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:17:40,726 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:17:40,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:17:40,727 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:17:40,727 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:17:40,727 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:17:40,727 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:17:40,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:17:40,728 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:17:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 19:17:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:17:40,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:40,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:40,759 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:40,766 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-21 19:17:40,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:40,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129431923] [2020-07-21 19:17:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:40,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:17:40,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:40,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:17:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:40,936 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 19:17:40,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:40,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129431923] [2020-07-21 19:17:40,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:40,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:17:40,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808075555] [2020-07-21 19:17:40,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:17:40,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:17:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:17:40,957 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 19:17:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:41,057 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 19:17:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:17:41,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 19:17:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:41,070 INFO L225 Difference]: With dead ends: 48 [2020-07-21 19:17:41,070 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 19:17:41,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 19:17:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 19:17:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 19:17:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 19:17:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-21 19:17:41,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-21 19:17:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:41,124 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-21 19:17:41,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:17:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-21 19:17:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 19:17:41,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:41,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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 19:17:41,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:41,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-21 19:17:41,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:41,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034284797] [2020-07-21 19:17:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:41,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:41,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 19:17:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 19:17:41,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:17:41,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034284797] [2020-07-21 19:17:41,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:41,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-21 19:17:41,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923822212] [2020-07-21 19:17:41,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:17:41,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:41,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:17:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:17:41,735 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-21 19:17:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:42,291 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-21 19:17:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 19:17:42,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-21 19:17:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:42,295 INFO L225 Difference]: With dead ends: 78 [2020-07-21 19:17:42,296 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 19:17:42,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:17:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 19:17:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-21 19:17:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:17:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-21 19:17:42,322 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-21 19:17:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:42,323 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-21 19:17:42,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:17:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-21 19:17:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:17:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:42,327 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:42,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:42,541 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-21 19:17:42,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:42,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931146196] [2020-07-21 19:17:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:42,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:17:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:42,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:17:42,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:17:42,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:42,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:42,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 19:17:42,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931146196] [2020-07-21 19:17:42,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:42,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 19:17:42,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622385343] [2020-07-21 19:17:42,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:17:42,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:17:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:17:42,987 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 11 states. [2020-07-21 19:17:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:43,179 INFO L93 Difference]: Finished difference Result 108 states and 173 transitions. [2020-07-21 19:17:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:17:43,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 19:17:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:43,184 INFO L225 Difference]: With dead ends: 108 [2020-07-21 19:17:43,184 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 19:17:43,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:17:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 19:17:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-07-21 19:17:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 19:17:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-21 19:17:43,217 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 40 [2020-07-21 19:17:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:43,218 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-21 19:17:43,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:17:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-21 19:17:43,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 19:17:43,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:43,222 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] [2020-07-21 19:17:43,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:43,424 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-21 19:17:43,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:43,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961771581] [2020-07-21 19:17:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:43,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:17:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:17:43,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:43,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:43,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:43,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:17:43,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961771581] [2020-07-21 19:17:43,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:43,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:17:43,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785875552] [2020-07-21 19:17:43,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:17:43,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:43,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:17:43,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:17:43,822 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 13 states. [2020-07-21 19:17:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:43,998 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-21 19:17:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:17:43,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-07-21 19:17:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:44,002 INFO L225 Difference]: With dead ends: 80 [2020-07-21 19:17:44,002 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 19:17:44,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:17:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 19:17:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 19:17:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 19:17:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-07-21 19:17:44,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 36 [2020-07-21 19:17:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:44,025 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-07-21 19:17:44,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:17:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-07-21 19:17:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:17:44,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:44,034 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:44,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:44,235 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1240446734, now seen corresponding path program 3 times [2020-07-21 19:17:44,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:44,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318725639] [2020-07-21 19:17:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:44,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:44,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:17:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:17:44,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:44,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 19:17:44,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318725639] [2020-07-21 19:17:44,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:44,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 19:17:44,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375726286] [2020-07-21 19:17:44,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:17:44,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:17:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:17:44,611 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 11 states. [2020-07-21 19:17:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:44,772 INFO L93 Difference]: Finished difference Result 91 states and 141 transitions. [2020-07-21 19:17:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:17:44,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 19:17:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:44,775 INFO L225 Difference]: With dead ends: 91 [2020-07-21 19:17:44,775 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 19:17:44,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:17:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 19:17:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-07-21 19:17:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:17:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 19:17:44,789 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 40 [2020-07-21 19:17:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:44,790 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 19:17:44,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:17:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 19:17:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 19:17:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:44,793 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:44,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:44,997 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1471069545, now seen corresponding path program 4 times [2020-07-21 19:17:44,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:44,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042809488] [2020-07-21 19:17:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:45,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:45,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:45,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:17:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-21 19:17:45,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:45,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:45,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:45,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 19:17:45,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042809488] [2020-07-21 19:17:45,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:45,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:17:45,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189894948] [2020-07-21 19:17:45,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:17:45,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:45,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:17:45,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:17:45,480 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-21 19:17:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:45,631 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-21 19:17:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:17:45,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-07-21 19:17:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:45,634 INFO L225 Difference]: With dead ends: 58 [2020-07-21 19:17:45,634 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 19:17:45,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:17:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 19:17:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-21 19:17:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 19:17:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-07-21 19:17:45,644 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2020-07-21 19:17:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:45,644 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-07-21 19:17:45,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:17:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-07-21 19:17:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 19:17:45,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:45,646 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:45,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:45,854 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-21 19:17:45,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:45,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642788916] [2020-07-21 19:17:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:45,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:45,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 19:17:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-21 19:17:46,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 19:17:46,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642788916] [2020-07-21 19:17:46,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:46,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-21 19:17:46,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046669788] [2020-07-21 19:17:46,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 19:17:46,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:46,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 19:17:46,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:17:46,628 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 27 states. [2020-07-21 19:17:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:48,188 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-07-21 19:17:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 19:17:48,189 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-21 19:17:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:48,191 INFO L225 Difference]: With dead ends: 105 [2020-07-21 19:17:48,191 INFO L226 Difference]: Without dead ends: 101 [2020-07-21 19:17:48,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 19:17:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-21 19:17:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-07-21 19:17:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 19:17:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-07-21 19:17:48,224 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 56 [2020-07-21 19:17:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:48,228 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-07-21 19:17:48,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 19:17:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-07-21 19:17:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 19:17:48,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:48,230 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:48,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:48,448 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 3 times [2020-07-21 19:17:48,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:48,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273114730] [2020-07-21 19:17:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:48,504 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:17:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-21 19:17:48,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:48,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:48,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:48,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:48,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-21 19:17:49,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273114730] [2020-07-21 19:17:49,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:49,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:17:49,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021396557] [2020-07-21 19:17:49,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:17:49,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:17:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:17:49,109 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 17 states. [2020-07-21 19:17:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:49,336 INFO L93 Difference]: Finished difference Result 103 states and 147 transitions. [2020-07-21 19:17:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:17:49,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-07-21 19:17:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:49,339 INFO L225 Difference]: With dead ends: 103 [2020-07-21 19:17:49,339 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 19:17:49,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:17:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 19:17:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-07-21 19:17:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 19:17:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 19:17:49,356 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 62 [2020-07-21 19:17:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:49,357 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 19:17:49,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:17:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 19:17:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 19:17:49,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:49,359 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:49,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:49,576 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash -633873909, now seen corresponding path program 4 times [2020-07-21 19:17:49,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:49,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927961153] [2020-07-21 19:17:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:49,656 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:17:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-21 19:17:49,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:49,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:50,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:50,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:50,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:50,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:50,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 135 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 19:17:50,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927961153] [2020-07-21 19:17:50,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:50,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:17:50,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400644010] [2020-07-21 19:17:50,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:17:50,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:17:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:17:50,452 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-21 19:17:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:50,717 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2020-07-21 19:17:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:17:50,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-07-21 19:17:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:50,721 INFO L225 Difference]: With dead ends: 85 [2020-07-21 19:17:50,721 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 19:17:50,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:17:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 19:17:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-21 19:17:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:17:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-07-21 19:17:50,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 96 [2020-07-21 19:17:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:50,743 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-07-21 19:17:50,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:17:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-07-21 19:17:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 19:17:50,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:50,747 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:50,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:50,948 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash -913129353, now seen corresponding path program 5 times [2020-07-21 19:17:50,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:50,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010704447] [2020-07-21 19:17:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:51,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:17:51,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 19:17:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 192 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-07-21 19:17:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:51,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:51,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 213 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-07-21 19:17:51,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010704447] [2020-07-21 19:17:51,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:51,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 19:17:51,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837000816] [2020-07-21 19:17:51,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:17:51,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:17:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:17:51,768 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 16 states. [2020-07-21 19:17:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:52,032 INFO L93 Difference]: Finished difference Result 130 states and 206 transitions. [2020-07-21 19:17:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:17:52,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 122 [2020-07-21 19:17:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:52,035 INFO L225 Difference]: With dead ends: 130 [2020-07-21 19:17:52,035 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:17:52,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:17:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:17:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-21 19:17:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 19:17:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-07-21 19:17:52,047 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 122 [2020-07-21 19:17:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:52,048 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-07-21 19:17:52,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:17:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-07-21 19:17:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-21 19:17:52,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:52,050 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:52,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:52,264 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 6 times [2020-07-21 19:17:52,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:52,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551153702] [2020-07-21 19:17:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:17:52,356 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:52,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:52,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-21 19:17:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-21 19:17:52,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-21 19:17:54,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551153702] [2020-07-21 19:17:54,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:54,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-21 19:17:54,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161381001] [2020-07-21 19:17:54,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 19:17:54,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 19:17:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 19:17:54,177 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 45 states. [2020-07-21 19:18:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:00,990 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2020-07-21 19:18:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-21 19:18:00,991 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-21 19:18:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:00,994 INFO L225 Difference]: With dead ends: 211 [2020-07-21 19:18:00,994 INFO L226 Difference]: Without dead ends: 207 [2020-07-21 19:18:01,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1797, Invalid=10413, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 19:18:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-21 19:18:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2020-07-21 19:18:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 19:18:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2020-07-21 19:18:01,046 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 102 [2020-07-21 19:18:01,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:01,049 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2020-07-21 19:18:01,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 19:18:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2020-07-21 19:18:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:18:01,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:01,055 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:01,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:01,269 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 7 times [2020-07-21 19:18:01,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:01,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653817709] [2020-07-21 19:18:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:01,366 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:01,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:18:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-21 19:18:01,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:01,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:01,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:01,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:01,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:01,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:01,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-21 19:18:02,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653817709] [2020-07-21 19:18:02,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:02,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:18:02,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111956559] [2020-07-21 19:18:02,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:18:02,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:02,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:18:02,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:18:02,512 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand 21 states. [2020-07-21 19:18:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:02,839 INFO L93 Difference]: Finished difference Result 215 states and 295 transitions. [2020-07-21 19:18:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:18:02,840 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-21 19:18:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:02,843 INFO L225 Difference]: With dead ends: 215 [2020-07-21 19:18:02,843 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 19:18:02,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:18:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 19:18:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2020-07-21 19:18:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 19:18:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-07-21 19:18:02,862 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 108 [2020-07-21 19:18:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:02,862 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-07-21 19:18:02,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:18:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-07-21 19:18:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 19:18:02,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:02,865 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:03,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:03,078 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -370212393, now seen corresponding path program 8 times [2020-07-21 19:18:03,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:03,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591690952] [2020-07-21 19:18:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:03,197 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:18:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 268 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-21 19:18:03,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:03,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:03,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:03,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:03,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 281 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-21 19:18:04,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591690952] [2020-07-21 19:18:04,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:04,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:18:04,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429705418] [2020-07-21 19:18:04,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:18:04,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:18:04,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:18:04,506 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 19 states. [2020-07-21 19:18:04,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:04,895 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2020-07-21 19:18:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 19:18:04,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-21 19:18:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:04,904 INFO L225 Difference]: With dead ends: 252 [2020-07-21 19:18:04,904 INFO L226 Difference]: Without dead ends: 182 [2020-07-21 19:18:04,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:18:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-21 19:18:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2020-07-21 19:18:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-21 19:18:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2020-07-21 19:18:04,922 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 142 [2020-07-21 19:18:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:04,922 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2020-07-21 19:18:04,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:18:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2020-07-21 19:18:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-21 19:18:04,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:04,924 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:05,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:05,138 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 9 times [2020-07-21 19:18:05,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:05,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105751918] [2020-07-21 19:18:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:05,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:05,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:05,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:18:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 396 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2020-07-21 19:18:05,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:05,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:05,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:05,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 416 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-07-21 19:18:06,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105751918] [2020-07-21 19:18:06,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:06,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:18:06,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428642108] [2020-07-21 19:18:06,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:18:06,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:18:06,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:18:06,821 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand 21 states. [2020-07-21 19:18:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:07,162 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2020-07-21 19:18:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:18:07,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-07-21 19:18:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:07,166 INFO L225 Difference]: With dead ends: 175 [2020-07-21 19:18:07,167 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 19:18:07,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 327 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:18:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 19:18:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2020-07-21 19:18:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 19:18:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2020-07-21 19:18:07,193 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 182 [2020-07-21 19:18:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:07,194 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2020-07-21 19:18:07,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:18:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2020-07-21 19:18:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-21 19:18:07,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:07,197 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:07,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:07,411 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 10 times [2020-07-21 19:18:07,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:07,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255974749] [2020-07-21 19:18:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:07,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:07,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-21 19:18:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-21 19:18:08,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-21 19:18:13,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255974749] [2020-07-21 19:18:13,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:13,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-21 19:18:13,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899368563] [2020-07-21 19:18:13,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-21 19:18:13,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-21 19:18:13,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-21 19:18:13,106 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand 75 states. [2020-07-21 19:18:13,621 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2020-07-21 19:18:13,855 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-21 19:18:14,101 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-07-21 19:18:14,313 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-21 19:18:14,527 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 44 [2020-07-21 19:18:14,720 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-21 19:18:14,928 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 41 [2020-07-21 19:18:15,120 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-21 19:18:15,330 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-07-21 19:18:15,506 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-21 19:18:15,761 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-07-21 19:18:15,931 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-21 19:18:16,179 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-07-21 19:18:18,987 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2020-07-21 19:18:19,335 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-21 19:18:19,679 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-21 19:18:19,987 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-21 19:18:20,296 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-21 19:18:20,606 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-21 19:18:20,882 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-21 19:18:22,767 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 44 [2020-07-21 19:18:23,125 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-21 19:18:23,446 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-21 19:18:23,755 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-21 19:18:24,040 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-21 19:18:24,333 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-21 19:18:24,607 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-21 19:18:24,898 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-21 19:18:25,173 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-21 19:18:25,442 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-21 19:18:25,693 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-21 19:18:25,948 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-21 19:18:26,177 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-21 19:18:26,419 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2020-07-21 19:18:26,866 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 26 [2020-07-21 19:18:29,668 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-07-21 19:18:30,033 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-21 19:18:30,407 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-07-21 19:18:30,769 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-07-21 19:18:31,089 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2020-07-21 19:18:31,419 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-21 19:18:31,726 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-21 19:18:32,040 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-21 19:18:32,330 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-21 19:18:32,646 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 38 [2020-07-21 19:18:32,912 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-21 19:18:33,198 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 35 [2020-07-21 19:18:33,449 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 30 [2020-07-21 19:18:33,723 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 32 [2020-07-21 19:18:34,144 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 19:18:35,728 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 19:18:36,820 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-21 19:18:37,320 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-21 19:18:39,026 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-21 19:18:39,347 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-21 19:18:39,677 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-21 19:18:40,113 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-07-21 19:18:40,472 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-21 19:18:40,793 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-21 19:18:41,413 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-21 19:18:41,787 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-21 19:18:42,001 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 7 [2020-07-21 19:18:42,735 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-21 19:18:43,062 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-21 19:18:43,385 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-21 19:18:43,699 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-21 19:18:44,141 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-21 19:18:47,634 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-21 19:18:47,898 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-21 19:18:48,426 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-07-21 19:18:48,745 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-21 19:18:49,228 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-21 19:18:49,556 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-21 19:18:50,025 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-21 19:18:50,989 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-21 19:18:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:51,048 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2020-07-21 19:18:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-21 19:18:51,053 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-21 19:18:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:51,062 INFO L225 Difference]: With dead ends: 528 [2020-07-21 19:18:51,062 INFO L226 Difference]: Without dead ends: 524 [2020-07-21 19:18:51,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 262 SyntacticMatches, 42 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16708 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=8020, Invalid=46970, Unknown=0, NotChecked=0, Total=54990 [2020-07-21 19:18:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-21 19:18:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 441. [2020-07-21 19:18:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-21 19:18:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2020-07-21 19:18:51,130 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 188 [2020-07-21 19:18:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:51,131 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2020-07-21 19:18:51,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-21 19:18:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2020-07-21 19:18:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-21 19:18:51,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:51,136 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:51,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:51,349 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 11 times [2020-07-21 19:18:51,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:51,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070021939] [2020-07-21 19:18:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:51,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:18:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-21 19:18:51,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:52,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:52,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-21 19:18:53,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070021939] [2020-07-21 19:18:53,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:53,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:18:53,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744914116] [2020-07-21 19:18:53,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:18:53,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:18:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:18:53,820 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand 25 states. [2020-07-21 19:18:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:54,259 INFO L93 Difference]: Finished difference Result 502 states and 783 transitions. [2020-07-21 19:18:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:18:54,260 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-21 19:18:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:54,265 INFO L225 Difference]: With dead ends: 502 [2020-07-21 19:18:54,266 INFO L226 Difference]: Without dead ends: 478 [2020-07-21 19:18:54,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 343 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:18:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-07-21 19:18:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 427. [2020-07-21 19:18:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-21 19:18:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 618 transitions. [2020-07-21 19:18:54,316 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 618 transitions. Word has length 194 [2020-07-21 19:18:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:54,316 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 618 transitions. [2020-07-21 19:18:54,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:18:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 618 transitions. [2020-07-21 19:18:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 19:18:54,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:54,321 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:54,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:54,535 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash -547968693, now seen corresponding path program 12 times [2020-07-21 19:18:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:54,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560608784] [2020-07-21 19:18:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:54,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:18:54,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2020-07-21 19:18:55,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:55,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:55,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:55,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:57,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:57,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:57,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:58,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:58,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:58,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2020-07-21 19:18:58,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560608784] [2020-07-21 19:18:58,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:58,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:18:58,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942779752] [2020-07-21 19:18:58,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:18:58,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:18:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:18:58,286 INFO L87 Difference]: Start difference. First operand 427 states and 618 transitions. Second operand 25 states. [2020-07-21 19:18:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:58,727 INFO L93 Difference]: Finished difference Result 478 states and 724 transitions. [2020-07-21 19:18:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:18:58,728 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 348 [2020-07-21 19:18:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:58,734 INFO L225 Difference]: With dead ends: 478 [2020-07-21 19:18:58,734 INFO L226 Difference]: Without dead ends: 443 [2020-07-21 19:18:58,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 651 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:18:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-21 19:18:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 394. [2020-07-21 19:18:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-21 19:18:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 572 transitions. [2020-07-21 19:18:58,774 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 572 transitions. Word has length 348 [2020-07-21 19:18:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:58,774 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 572 transitions. [2020-07-21 19:18:58,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:18:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 572 transitions. [2020-07-21 19:18:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 19:18:58,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:58,779 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:59,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:59,026 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 13 times [2020-07-21 19:18:59,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:59,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739437159] [2020-07-21 19:18:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:18:59,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:59,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:59,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-21 19:18:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:19:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-21 19:19:00,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:19:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 19:19:15,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739437159] [2020-07-21 19:19:15,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:19:15,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-21 19:19:15,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275249749] [2020-07-21 19:19:15,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-21 19:19:15,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:19:15,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-21 19:19:15,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-21 19:19:15,511 INFO L87 Difference]: Start difference. First operand 394 states and 572 transitions. Second operand 129 states. [2020-07-21 19:19:16,019 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-21 19:19:16,855 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 97 [2020-07-21 19:19:17,506 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-21 19:19:18,229 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 95 [2020-07-21 19:19:18,908 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-21 19:19:19,601 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2020-07-21 19:19:20,195 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-21 19:19:20,840 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 89 [2020-07-21 19:19:21,452 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-21 19:19:22,099 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 86 [2020-07-21 19:19:22,682 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-21 19:19:23,317 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 83 [2020-07-21 19:19:23,867 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-21 19:19:24,578 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 80 [2020-07-21 19:19:25,141 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-21 19:19:25,841 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 77 [2020-07-21 19:19:26,371 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-21 19:19:27,043 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 74 [2020-07-21 19:19:27,549 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-21 19:19:28,235 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 71 [2020-07-21 19:19:28,696 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-21 19:19:29,301 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 68 [2020-07-21 19:19:29,761 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-21 19:19:30,339 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 65 [2020-07-21 19:19:30,781 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-21 19:19:31,359 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 62 [2020-07-21 19:19:31,778 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-21 19:19:32,365 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 59 [2020-07-21 19:19:32,767 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-21 19:19:33,302 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2020-07-21 19:19:33,699 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-21 19:19:34,227 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-07-21 19:19:34,606 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-21 19:19:35,118 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2020-07-21 19:19:35,473 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-21 19:19:35,971 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-07-21 19:19:36,300 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-21 19:19:36,753 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 44 [2020-07-21 19:19:37,079 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-21 19:19:37,520 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 41 [2020-07-21 19:19:37,828 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-21 19:19:38,257 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2020-07-21 19:19:38,545 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-21 19:19:38,951 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-07-21 19:19:39,226 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-21 19:19:39,647 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2020-07-21 19:19:39,920 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-21 19:19:40,304 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2020-07-21 19:19:40,908 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2020-07-21 19:19:44,970 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-21 19:19:45,960 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-21 19:19:46,903 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-21 19:19:47,858 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-21 19:19:48,760 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-21 19:19:49,656 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-21 19:19:50,525 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-21 19:19:51,367 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-21 19:19:52,162 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-21 19:19:52,939 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-21 19:19:53,689 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-21 19:19:54,415 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-21 19:19:55,119 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-21 19:19:55,771 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-21 19:19:56,402 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-21 19:19:57,004 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-21 19:19:57,580 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-21 19:19:58,140 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-21 19:19:58,667 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-21 19:19:59,196 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-21 19:19:59,684 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-21 19:20:00,142 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-21 19:20:00,590 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-21 19:20:03,988 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-21 19:20:05,010 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-21 19:20:05,980 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-21 19:20:06,981 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-21 19:20:07,945 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-21 19:20:08,919 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 86 [2020-07-21 19:20:09,819 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-21 19:20:10,761 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 83 [2020-07-21 19:20:11,633 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-21 19:20:12,559 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 80 [2020-07-21 19:20:13,408 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-21 19:20:14,268 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-21 19:20:15,073 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-21 19:20:15,923 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-21 19:20:16,709 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-21 19:20:17,547 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-21 19:20:18,311 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-21 19:20:19,097 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-21 19:20:19,843 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-21 19:20:20,615 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-21 19:20:21,347 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-21 19:20:22,087 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-21 19:20:22,769 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-21 19:20:23,478 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-21 19:20:24,151 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-21 19:20:24,855 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-21 19:20:25,471 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-21 19:20:26,128 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-21 19:20:26,733 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-21 19:20:27,363 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-21 19:20:27,925 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-21 19:20:28,517 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-21 19:20:29,081 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-21 19:20:29,657 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-21 19:20:30,191 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-21 19:20:30,737 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-21 19:20:31,241 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-21 19:20:31,754 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-21 19:20:32,241 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-21 19:20:32,752 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-21 19:20:33,209 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-21 19:20:33,667 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-21 19:20:34,095 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-21 19:20:34,545 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-21 19:20:34,951 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-21 19:20:35,391 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2020-07-21 19:20:35,776 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-21 19:20:36,190 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 23 [2020-07-21 19:20:36,933 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-07-21 19:20:39,398 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-21 19:20:41,106 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-21 19:20:42,245 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-21 19:20:43,351 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-21 19:20:44,480 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-21 19:20:45,557 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-21 19:20:46,650 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-21 19:20:47,708 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-21 19:20:48,769 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-21 19:20:49,778 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-21 19:20:50,814 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-21 19:20:51,806 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-21 19:20:52,794 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-21 19:20:53,741 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-21 19:20:54,719 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-21 19:20:55,657 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-21 19:20:56,615 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 74 [2020-07-21 19:20:57,534 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-21 19:20:58,459 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 71 [2020-07-21 19:20:59,331 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-21 19:21:00,202 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 68 [2020-07-21 19:21:01,060 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-21 19:21:01,913 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 65 [2020-07-21 19:21:02,745 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-21 19:21:03,573 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 62 [2020-07-21 19:21:04,368 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-21 19:21:05,161 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2020-07-21 19:21:05,920 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-21 19:21:06,690 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 56 [2020-07-21 19:21:07,705 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-21 19:21:08,454 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-21 19:21:09,274 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-21 19:21:10,005 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 50 [2020-07-21 19:21:10,659 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-21 19:21:11,357 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2020-07-21 19:21:11,982 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-21 19:21:12,657 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 44 [2020-07-21 19:21:13,282 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-21 19:21:13,926 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 41 [2020-07-21 19:21:14,512 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-21 19:21:15,125 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 38 [2020-07-21 19:21:15,689 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-21 19:21:16,279 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-07-21 19:21:16,802 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-21 19:21:17,338 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2020-07-21 19:21:17,775 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-21 19:21:18,215 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-21 19:21:18,607 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-21 19:21:19,029 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-21 19:21:21,528 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-21 19:21:21,892 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-21 19:21:22,315 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-21 19:21:22,994 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-21 19:21:23,403 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-21 19:21:23,808 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-21 19:21:24,254 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-21 19:21:26,795 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-21 19:21:28,551 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-21 19:21:29,275 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 19:21:31,137 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 19:21:31,988 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-21 19:21:33,089 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-21 19:21:34,101 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-21 19:21:35,117 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-21 19:21:36,101 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-21 19:21:37,148 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-21 19:21:38,111 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-21 19:21:38,821 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-21 19:21:39,827 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-21 19:21:40,948 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-21 19:21:42,112 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 86 [2020-07-21 19:21:43,277 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 71 [2020-07-21 19:21:44,477 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-07-21 19:21:45,768 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-07-21 19:21:46,969 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 74 [2020-07-21 19:21:47,946 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-21 19:21:49,134 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 80 [2020-07-21 19:21:50,375 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 89 [2020-07-21 19:21:51,702 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 220 DAG size of output: 95 [2020-07-21 19:21:53,222 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 92 [2020-07-21 19:21:54,454 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-07-21 19:21:55,839 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 229 DAG size of output: 98 [2020-07-21 19:21:56,584 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-21 19:21:57,113 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-21 19:21:58,703 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-21 19:22:00,209 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 268 DAG size of output: 97 [2020-07-21 19:22:01,732 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-21 19:22:03,177 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 260 DAG size of output: 94 [2020-07-21 19:22:04,612 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-21 19:22:06,070 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 252 DAG size of output: 91 [2020-07-21 19:22:07,436 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-21 19:22:08,818 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 245 DAG size of output: 88 [2020-07-21 19:22:10,234 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-21 19:22:11,618 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 240 DAG size of output: 85 [2020-07-21 19:22:12,943 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-21 19:22:14,302 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 233 DAG size of output: 82 [2020-07-21 19:22:15,594 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-21 19:22:16,894 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 79 [2020-07-21 19:22:18,164 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-21 19:22:19,463 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 76 [2020-07-21 19:22:20,686 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 70 [2020-07-21 19:22:21,948 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 73 [2020-07-21 19:22:23,457 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 258 DAG size of output: 95 [2020-07-21 19:22:24,999 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 266 DAG size of output: 98 [2020-07-21 19:22:26,227 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2020-07-21 19:22:27,464 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 70 [2020-07-21 19:22:28,951 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 250 DAG size of output: 92 [2020-07-21 19:22:30,146 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 64 [2020-07-21 19:22:31,342 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 67 [2020-07-21 19:22:32,819 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 243 DAG size of output: 89 [2020-07-21 19:22:33,988 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 61 [2020-07-21 19:22:35,133 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2020-07-21 19:22:36,618 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 238 DAG size of output: 86 [2020-07-21 19:22:37,835 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 58 [2020-07-21 19:22:38,993 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 61 [2020-07-21 19:22:40,579 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 231 DAG size of output: 83 [2020-07-21 19:22:41,733 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-21 19:22:42,878 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 58 [2020-07-21 19:22:44,421 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 80 [2020-07-21 19:22:45,505 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-21 19:22:46,594 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 55 [2020-07-21 19:22:48,117 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 77 [2020-07-21 19:22:49,244 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-21 19:22:50,195 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-21 19:22:51,128 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-21 19:22:52,037 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-21 19:22:53,111 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-21 19:22:53,982 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-21 19:22:54,925 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-21 19:22:55,736 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-21 19:22:56,524 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-21 19:22:57,309 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-21 19:22:58,465 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-07-21 19:22:58,922 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-07-21 19:22:59,520 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-07-21 19:23:00,002 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-07-21 19:23:00,584 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-07-21 19:23:03,568 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-21 19:23:04,304 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-21 19:23:05,304 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2020-07-21 19:23:06,659 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 200 DAG size of output: 83 [2020-07-21 19:23:07,957 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 68 [2020-07-21 19:23:08,932 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2020-07-21 19:23:10,276 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 74 [2020-07-21 19:23:11,670 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 62 [2020-07-21 19:23:12,990 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 65 [2020-07-21 19:23:14,449 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 71 [2020-07-21 19:23:15,702 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-07-21 19:23:17,216 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 77 [2020-07-21 19:23:18,365 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2020-07-21 19:23:19,860 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 226 DAG size of output: 92 [2020-07-21 19:23:21,038 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-07-21 19:23:22,230 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-07-21 19:23:23,706 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 208 DAG size of output: 86 [2020-07-21 19:23:25,217 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 217 DAG size of output: 89 [2020-07-21 19:23:27,007 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2020-07-21 19:23:29,137 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-07-21 19:23:30,467 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-07-21 19:23:31,698 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-07-21 19:23:32,816 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 26 [2020-07-21 19:23:34,200 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2020-07-21 19:23:35,655 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 14 [2020-07-21 19:23:36,505 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-07-21 19:23:44,021 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-21 19:23:45,231 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2020-07-21 19:23:47,316 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-07-21 19:23:48,373 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-07-21 19:23:49,115 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-07-21 19:23:50,527 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-07-21 19:23:52,033 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-07-21 19:24:12,040 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 231 DAG size of output: 98 [2020-07-21 19:24:13,039 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 7 [2020-07-21 19:24:13,708 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-21 19:24:14,357 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:16,440 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 222 DAG size of output: 95 [2020-07-21 19:24:18,455 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 213 DAG size of output: 92 [2020-07-21 19:24:20,237 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 205 DAG size of output: 89 [2020-07-21 19:24:22,211 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 199 DAG size of output: 86 [2020-07-21 19:24:24,121 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 192 DAG size of output: 83 [2020-07-21 19:24:26,010 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 184 DAG size of output: 80 [2020-07-21 19:24:27,766 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 178 DAG size of output: 77 [2020-07-21 19:24:29,410 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 171 DAG size of output: 74 [2020-07-21 19:24:31,836 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-07-21 19:24:34,291 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 162 DAG size of output: 71 [2020-07-21 19:24:36,122 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 154 DAG size of output: 68 [2020-07-21 19:24:37,812 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 65 [2020-07-21 19:24:39,431 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2020-07-21 19:24:40,972 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-07-21 19:24:42,798 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2020-07-21 19:24:44,321 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-07-21 19:24:46,037 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 194 DAG size of output: 80 [2020-07-21 19:24:48,881 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-07-21 19:24:54,433 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:55,153 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:55,935 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:56,652 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:57,440 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:58,160 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:58,941 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 19:24:59,663 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-21 19:25:00,827 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-21 19:25:01,986 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-21 19:25:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:25:02,264 INFO L93 Difference]: Finished difference Result 1231 states and 2149 transitions. [2020-07-21 19:25:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2020-07-21 19:25:02,267 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-21 19:25:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:25:02,280 INFO L225 Difference]: With dead ends: 1231 [2020-07-21 19:25:02,280 INFO L226 Difference]: Without dead ends: 1227 [2020-07-21 19:25:02,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 516 SyntacticMatches, 66 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88263 ImplicationChecksByTransitivity, 274.5s TimeCoverageRelationStatistics Valid=38389, Invalid=228383, Unknown=0, NotChecked=0, Total=266772 [2020-07-21 19:25:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2020-07-21 19:25:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1036. [2020-07-21 19:25:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-07-21 19:25:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1613 transitions. [2020-07-21 19:25:02,449 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1613 transitions. Word has length 354 [2020-07-21 19:25:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:25:02,450 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1613 transitions. [2020-07-21 19:25:02,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-21 19:25:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1613 transitions. [2020-07-21 19:25:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-21 19:25:02,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:25:02,466 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:25:02,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:25:02,680 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:25:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:25:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 14 times [2020-07-21 19:25:02,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:25:02,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487959255] [2020-07-21 19:25:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:25:03,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:25:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:25:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:25:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:25:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-21 19:25:03,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:25:05,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:05,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:06,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:06,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:06,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:07,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:07,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:11,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:11,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:13,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:13,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:13,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:14,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:14,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-21 19:25:14,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487959255] [2020-07-21 19:25:14,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:25:14,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 19:25:14,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272671495] [2020-07-21 19:25:14,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 19:25:14,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:25:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 19:25:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:25:14,576 INFO L87 Difference]: Start difference. First operand 1036 states and 1613 transitions. Second operand 29 states. [2020-07-21 19:25:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:25:16,041 INFO L93 Difference]: Finished difference Result 1221 states and 2313 transitions. [2020-07-21 19:25:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 19:25:16,046 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-21 19:25:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:25:16,059 INFO L225 Difference]: With dead ends: 1221 [2020-07-21 19:25:16,060 INFO L226 Difference]: Without dead ends: 1194 [2020-07-21 19:25:16,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 19:25:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-07-21 19:25:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1024. [2020-07-21 19:25:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-07-21 19:25:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1655 transitions. [2020-07-21 19:25:16,267 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1655 transitions. Word has length 360 [2020-07-21 19:25:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:25:16,268 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1655 transitions. [2020-07-21 19:25:16,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 19:25:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1655 transitions. [2020-07-21 19:25:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 19:25:16,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:25:16,279 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 40, 39, 39, 39, 39, 39, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:25:16,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:25:16,493 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:25:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:25:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash 548363287, now seen corresponding path program 15 times [2020-07-21 19:25:16,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:25:16,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516289639] [2020-07-21 19:25:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:25:16,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:25:16,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:25:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-21 19:25:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:25:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 967 proven. 1942 refuted. 0 times theorem prover too weak. 10949 trivial. 0 not checked. [2020-07-21 19:25:17,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:25:25,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:25,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:26,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:26,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 967 proven. 2015 refuted. 0 times theorem prover too weak. 10876 trivial. 0 not checked. [2020-07-21 19:25:26,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516289639] [2020-07-21 19:25:26,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:25:26,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 19:25:26,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217418838] [2020-07-21 19:25:26,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 19:25:26,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:25:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 19:25:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:25:26,357 INFO L87 Difference]: Start difference. First operand 1024 states and 1655 transitions. Second operand 24 states. [2020-07-21 19:25:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:25:28,547 INFO L93 Difference]: Finished difference Result 2081 states and 3730 transitions. [2020-07-21 19:25:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 19:25:28,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 434 [2020-07-21 19:25:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:25:28,562 INFO L225 Difference]: With dead ends: 2081 [2020-07-21 19:25:28,562 INFO L226 Difference]: Without dead ends: 1307 [2020-07-21 19:25:28,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 845 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=1031, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 19:25:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-07-21 19:25:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 981. [2020-07-21 19:25:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-21 19:25:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1359 transitions. [2020-07-21 19:25:28,719 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1359 transitions. Word has length 434 [2020-07-21 19:25:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:25:28,719 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1359 transitions. [2020-07-21 19:25:28,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 19:25:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1359 transitions. [2020-07-21 19:25:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 19:25:28,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:25:28,728 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 48, 47, 47, 47, 47, 47, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:25:28,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:25:28,942 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:25:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:25:28,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1908418025, now seen corresponding path program 16 times [2020-07-21 19:25:28,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:25:28,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106453335] [2020-07-21 19:25:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:25:29,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:25:29,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:25:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2426 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 19:25:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:25:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20074 backedges. 1640 proven. 2215 refuted. 0 times theorem prover too weak. 16219 trivial. 0 not checked. [2020-07-21 19:25:29,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:25:35,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:35,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:35,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:35,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:36,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:36,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:36,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:41,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:41,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:42,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:42,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:43,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:43,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:43,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:43,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:43,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20074 backedges. 1640 proven. 2256 refuted. 0 times theorem prover too weak. 16178 trivial. 0 not checked. [2020-07-21 19:25:43,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106453335] [2020-07-21 19:25:43,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:25:43,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 27 [2020-07-21 19:25:43,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835946123] [2020-07-21 19:25:43,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 19:25:43,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:25:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 19:25:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:25:43,953 INFO L87 Difference]: Start difference. First operand 981 states and 1359 transitions. Second operand 27 states. [2020-07-21 19:25:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:25:45,845 INFO L93 Difference]: Finished difference Result 1347 states and 1939 transitions. [2020-07-21 19:25:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 19:25:45,849 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 514 [2020-07-21 19:25:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:25:45,859 INFO L225 Difference]: With dead ends: 1347 [2020-07-21 19:25:45,859 INFO L226 Difference]: Without dead ends: 1181 [2020-07-21 19:25:45,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 979 SyntacticMatches, 23 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=489, Invalid=1403, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 19:25:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-07-21 19:25:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 978. [2020-07-21 19:25:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-21 19:25:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1326 transitions. [2020-07-21 19:25:45,975 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1326 transitions. Word has length 514 [2020-07-21 19:25:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:25:45,976 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1326 transitions. [2020-07-21 19:25:45,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 19:25:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1326 transitions. [2020-07-21 19:25:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-21 19:25:45,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:25:45,987 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:25:46,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:25:46,200 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:25:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:25:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2099436055, now seen corresponding path program 17 times [2020-07-21 19:25:46,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:25:46,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911753901] [2020-07-21 19:25:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:25:46,810 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:25:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:25:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:25:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:25:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2020-07-21 19:25:47,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:25:48,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:48,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:49,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:49,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:49,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:49,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:49,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:58,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:25:58,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:01,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:01,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:03,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:03,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:03,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:03,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:04,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:04,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:26:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2802 refuted. 0 times theorem prover too weak. 32623 trivial. 0 not checked. [2020-07-21 19:26:04,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911753901] [2020-07-21 19:26:04,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:26:04,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 19:26:04,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721552143] [2020-07-21 19:26:04,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 19:26:04,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:26:04,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 19:26:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:26:04,686 INFO L87 Difference]: Start difference. First operand 978 states and 1326 transitions. Second operand 29 states. [2020-07-21 19:26:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:26:06,041 INFO L93 Difference]: Finished difference Result 1043 states and 1391 transitions. [2020-07-21 19:26:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 19:26:06,047 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 674 [2020-07-21 19:26:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:26:06,055 INFO L225 Difference]: With dead ends: 1043 [2020-07-21 19:26:06,055 INFO L226 Difference]: Without dead ends: 1039 [2020-07-21 19:26:06,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1295 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 19:26:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-07-21 19:26:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 981. [2020-07-21 19:26:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-21 19:26:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1329 transitions. [2020-07-21 19:26:06,185 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1329 transitions. Word has length 674 [2020-07-21 19:26:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:26:06,186 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1329 transitions. [2020-07-21 19:26:06,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 19:26:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1329 transitions. [2020-07-21 19:26:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-21 19:26:06,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:26:06,196 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:26:06,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:26:06,412 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:26:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:26:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 18 times [2020-07-21 19:26:06,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:26:06,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715062863] [2020-07-21 19:26:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 19:26:07,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:26:07,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:26:07,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-21 19:26:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:26:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-21 19:26:11,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:28:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 35698 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-21 19:28:13,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715062863] [2020-07-21 19:28:13,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:28:13,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 206] total 231 [2020-07-21 19:28:13,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959576618] [2020-07-21 19:28:13,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 231 states [2020-07-21 19:28:13,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:28:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2020-07-21 19:28:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=52346, Unknown=0, NotChecked=0, Total=53130 [2020-07-21 19:28:13,788 INFO L87 Difference]: Start difference. First operand 981 states and 1329 transitions. Second operand 231 states. [2020-07-21 19:28:16,397 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 377 DAG size of output: 6 [2020-07-21 19:28:21,794 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 439 DAG size of output: 193 [2020-07-21 19:28:25,948 WARN L193 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 414 DAG size of output: 190 [2020-07-21 19:28:30,216 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 433 DAG size of output: 191 [2020-07-21 19:28:34,605 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 408 DAG size of output: 187 [2020-07-21 19:28:39,554 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 427 DAG size of output: 188 [2020-07-21 19:28:43,824 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 402 DAG size of output: 184 [2020-07-21 19:28:48,606 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 421 DAG size of output: 185 [2020-07-21 19:28:52,795 WARN L193 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 396 DAG size of output: 181 [2020-07-21 19:28:57,620 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 414 DAG size of output: 182 [2020-07-21 19:29:01,587 WARN L193 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 391 DAG size of output: 178 [2020-07-21 19:29:06,308 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 409 DAG size of output: 179 [2020-07-21 19:29:10,435 WARN L193 SmtUtils]: Spent 3.63 s on a formula simplification. DAG size of input: 386 DAG size of output: 175 [2020-07-21 19:29:15,108 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 404 DAG size of output: 176 [2020-07-21 19:29:18,753 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 380 DAG size of output: 172 [2020-07-21 19:29:24,037 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 397 DAG size of output: 173 [2020-07-21 19:29:28,147 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 376 DAG size of output: 169 [2020-07-21 19:29:32,966 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 393 DAG size of output: 170 [2020-07-21 19:29:36,942 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 371 DAG size of output: 166 [2020-07-21 19:29:42,093 WARN L193 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 388 DAG size of output: 167 [2020-07-21 19:29:45,712 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 364 DAG size of output: 163 [2020-07-21 19:29:50,793 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 381 DAG size of output: 164 [2020-07-21 19:29:54,520 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 357 DAG size of output: 160 [2020-07-21 19:29:59,373 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 373 DAG size of output: 161 [2020-07-21 19:30:03,302 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 352 DAG size of output: 157 [2020-07-21 19:30:08,355 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 368 DAG size of output: 158 [2020-07-21 19:30:12,126 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 347 DAG size of output: 154 [2020-07-21 19:30:17,274 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 363 DAG size of output: 155 [2020-07-21 19:30:20,976 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 340 DAG size of output: 151 [2020-07-21 19:30:25,154 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 355 DAG size of output: 152 [2020-07-21 19:30:28,867 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 336 DAG size of output: 148 [2020-07-21 19:30:32,943 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 351 DAG size of output: 149 [2020-07-21 19:30:36,664 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 332 DAG size of output: 145 [2020-07-21 19:30:41,027 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 347 DAG size of output: 146 [2020-07-21 19:30:44,569 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 325 DAG size of output: 142 [2020-07-21 19:30:48,790 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 340 DAG size of output: 143 [2020-07-21 19:30:52,324 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 318 DAG size of output: 139 [2020-07-21 19:30:56,700 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 333 DAG size of output: 140 [2020-07-21 19:31:00,213 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 311 DAG size of output: 136 [2020-07-21 19:31:04,509 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 325 DAG size of output: 137 [2020-07-21 19:31:07,981 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 306 DAG size of output: 133 [2020-07-21 19:31:12,824 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 320 DAG size of output: 134