/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:35:46,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:35:46,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:35:46,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:35:46,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:35:46,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:35:46,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:35:46,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:35:46,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:35:46,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:35:46,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:35:46,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:35:46,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:35:46,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:35:46,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:35:46,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:35:46,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:35:46,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:35:46,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:35:46,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:35:46,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:35:46,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:35:46,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:35:46,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:35:46,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 12:35:46,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 12:35:46,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 12:35:46,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 12:35:46,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 12:35:46,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 12:35:46,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 12:35:46,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 12:35:46,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 12:35:46,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 12:35:46,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 12:35:46,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 12:35:46,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 12:35:46,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 12:35:46,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:35:46,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:35:46,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:35:46,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:35:46,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:35:46,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:35:46,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:35:46,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:35:46,462 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:35:46,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:35:46,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:35:46,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:35:46,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:35:46,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:35:46,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:35:46,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:35:46,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:35:46,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:35:46,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:35:46,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:35:46,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:35:46,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:35:46,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:35:46,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:35:46,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:35:46,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:35:46,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:35:46,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:35:46,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:35:46,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:35:46,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:46,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:35:46,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:35:46,466 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 -> NOT_INCREMENTALLY [2020-07-20 12:35:46,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:35:46,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:35:46,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:35:46,772 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:35:46,772 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:35:46,773 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 12:35:46,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cafac4ab1/a09a91e9025c43c28052c5c7338e61d9/FLAG0536c20bf [2020-07-20 12:35:47,523 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:35:47,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 12:35:47,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cafac4ab1/a09a91e9025c43c28052c5c7338e61d9/FLAG0536c20bf [2020-07-20 12:35:47,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cafac4ab1/a09a91e9025c43c28052c5c7338e61d9 [2020-07-20 12:35:47,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:35:47,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:35:47,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:35:47,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:35:47,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:35:47,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:35:47" (1/1) ... [2020-07-20 12:35:47,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c6cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:47, skipping insertion in model container [2020-07-20 12:35:47,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:35:47" (1/1) ... [2020-07-20 12:35:47,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:35:47,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:35:48,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:35:48,953 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:35:49,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:35:49,538 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:35:49,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49 WrapperNode [2020-07-20 12:35:49,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:35:49,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:35:49,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:35:49,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:35:49,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... [2020-07-20 12:35:49,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:35:49,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:35:49,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:35:49,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:35:49,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:35:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:35:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:35:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:35:49,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:35:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:35:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:35:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:35:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:35:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:35:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:35:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:35:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:35:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:35:49,871 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:35:49,871 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:35:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:35:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:35:49,872 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:35:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:35:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:35:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:35:52,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:35:52,435 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:35:52,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:35:52 BoogieIcfgContainer [2020-07-20 12:35:52,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:35:52,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:35:52,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:35:52,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:35:52,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:35:47" (1/3) ... [2020-07-20 12:35:52,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512a5511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:35:52, skipping insertion in model container [2020-07-20 12:35:52,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:35:49" (2/3) ... [2020-07-20 12:35:52,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512a5511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:35:52, skipping insertion in model container [2020-07-20 12:35:52,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:35:52" (3/3) ... [2020-07-20 12:35:52,465 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 12:35:52,477 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:35:52,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:35:52,506 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:35:52,539 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:35:52,539 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:35:52,539 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:35:52,539 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:35:52,539 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:35:52,540 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:35:52,540 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:35:52,540 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:35:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 12:35:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 12:35:52,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:52,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:52,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:52,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 12:35:52,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:52,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939200894] [2020-07-20 12:35:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:35:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:53,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:53,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939200894] [2020-07-20 12:35:53,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:53,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:35:53,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572401394] [2020-07-20 12:35:53,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:35:53,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:35:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:35:53,486 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 12:35:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:53,895 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-20 12:35:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:35:53,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 12:35:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:53,928 INFO L225 Difference]: With dead ends: 2333 [2020-07-20 12:35:53,929 INFO L226 Difference]: Without dead ends: 1545 [2020-07-20 12:35:53,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:35:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-20 12:35:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-20 12:35:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-20 12:35:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-20 12:35:54,138 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-20 12:35:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:54,140 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-20 12:35:54,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:35:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-20 12:35:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:35:54,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:54,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:54,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:54,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-20 12:35:54,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:54,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071212089] [2020-07-20 12:35:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:54,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:35:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:54,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:54,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071212089] [2020-07-20 12:35:54,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:54,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:35:54,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070968179] [2020-07-20 12:35:54,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:35:54,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:35:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:54,938 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 3 states. [2020-07-20 12:35:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:55,139 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-20 12:35:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:35:55,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:35:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:55,157 INFO L225 Difference]: With dead ends: 4438 [2020-07-20 12:35:55,158 INFO L226 Difference]: Without dead ends: 3024 [2020-07-20 12:35:55,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-20 12:35:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-20 12:35:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-20 12:35:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-20 12:35:55,285 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-20 12:35:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:55,286 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-20 12:35:55,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:35:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-20 12:35:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:35:55,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:55,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:55,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:55,512 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-20 12:35:55,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:55,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208638745] [2020-07-20 12:35:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:35:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:56,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:56,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208638745] [2020-07-20 12:35:56,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:56,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:35:56,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054140656] [2020-07-20 12:35:56,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:35:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:35:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:56,031 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 3 states. [2020-07-20 12:35:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:56,252 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-20 12:35:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:35:56,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:35:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:56,283 INFO L225 Difference]: With dead ends: 8991 [2020-07-20 12:35:56,283 INFO L226 Difference]: Without dead ends: 6011 [2020-07-20 12:35:56,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-20 12:35:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-20 12:35:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-20 12:35:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-20 12:35:56,508 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-20 12:35:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:56,509 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-20 12:35:56,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:35:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-20 12:35:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 12:35:56,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:56,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:56,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:56,737 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-20 12:35:56,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:56,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798662733] [2020-07-20 12:35:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:57,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:35:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:57,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:57,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798662733] [2020-07-20 12:35:57,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:57,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:35:57,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300179266] [2020-07-20 12:35:57,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:35:57,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:35:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:57,200 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 3 states. [2020-07-20 12:35:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:57,424 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-20 12:35:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:35:57,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 12:35:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:57,454 INFO L225 Difference]: With dead ends: 9010 [2020-07-20 12:35:57,455 INFO L226 Difference]: Without dead ends: 6029 [2020-07-20 12:35:57,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-20 12:35:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-20 12:35:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-20 12:35:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-20 12:35:57,633 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-20 12:35:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:57,633 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-20 12:35:57,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:35:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-20 12:35:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:35:57,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:57,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:57,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:57,858 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-20 12:35:57,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:57,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718244696] [2020-07-20 12:35:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:35:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:58,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:58,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718244696] [2020-07-20 12:35:58,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:58,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:35:58,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296188287] [2020-07-20 12:35:58,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:35:58,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:35:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:58,393 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 3 states. [2020-07-20 12:35:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:58,684 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-20 12:35:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:35:58,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 12:35:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:58,715 INFO L225 Difference]: With dead ends: 8718 [2020-07-20 12:35:58,716 INFO L226 Difference]: Without dead ends: 5904 [2020-07-20 12:35:58,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-20 12:35:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-20 12:35:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-20 12:35:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-20 12:35:58,979 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-20 12:35:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:58,980 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-20 12:35:58,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:35:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-20 12:35:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:35:58,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:58,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:59,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:59,211 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-20 12:35:59,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:59,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506447593] [2020-07-20 12:35:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:35:59,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:59,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:59,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506447593] [2020-07-20 12:35:59,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:59,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:35:59,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869928579] [2020-07-20 12:35:59,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:35:59,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:59,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:35:59,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:35:59,675 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 4 states. [2020-07-20 12:36:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:00,018 INFO L93 Difference]: Finished difference Result 16157 states and 24615 transitions. [2020-07-20 12:36:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:36:00,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 12:36:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:00,070 INFO L225 Difference]: With dead ends: 16157 [2020-07-20 12:36:00,071 INFO L226 Difference]: Without dead ends: 10795 [2020-07-20 12:36:00,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:36:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2020-07-20 12:36:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6137. [2020-07-20 12:36:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6137 states. [2020-07-20 12:36:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9444 transitions. [2020-07-20 12:36:00,505 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9444 transitions. Word has length 328 [2020-07-20 12:36:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:00,506 INFO L479 AbstractCegarLoop]: Abstraction has 6137 states and 9444 transitions. [2020-07-20 12:36:00,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:36:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9444 transitions. [2020-07-20 12:36:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:36:00,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:00,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:00,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:00,737 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1740117251, now seen corresponding path program 1 times [2020-07-20 12:36:00,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:00,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128645405] [2020-07-20 12:36:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:01,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:01,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128645405] [2020-07-20 12:36:01,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:01,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:01,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531437117] [2020-07-20 12:36:01,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:01,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:01,202 INFO L87 Difference]: Start difference. First operand 6137 states and 9444 transitions. Second operand 3 states. [2020-07-20 12:36:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:01,558 INFO L93 Difference]: Finished difference Result 16841 states and 25613 transitions. [2020-07-20 12:36:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:01,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:36:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:01,591 INFO L225 Difference]: With dead ends: 16841 [2020-07-20 12:36:01,592 INFO L226 Difference]: Without dead ends: 11507 [2020-07-20 12:36:01,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2020-07-20 12:36:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 6241. [2020-07-20 12:36:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6241 states. [2020-07-20 12:36:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9587 transitions. [2020-07-20 12:36:02,036 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9587 transitions. Word has length 330 [2020-07-20 12:36:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:02,036 INFO L479 AbstractCegarLoop]: Abstraction has 6241 states and 9587 transitions. [2020-07-20 12:36:02,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9587 transitions. [2020-07-20 12:36:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:36:02,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:02,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:02,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:02,266 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:02,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-20 12:36:02,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:02,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791030500] [2020-07-20 12:36:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:02,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:36:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:02,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:02,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791030500] [2020-07-20 12:36:02,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:02,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:36:02,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713318097] [2020-07-20 12:36:02,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:36:02,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:36:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:36:02,867 INFO L87 Difference]: Start difference. First operand 6241 states and 9587 transitions. Second operand 8 states. [2020-07-20 12:36:04,257 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 12:36:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:05,381 INFO L93 Difference]: Finished difference Result 15832 states and 24500 transitions. [2020-07-20 12:36:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:36:05,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2020-07-20 12:36:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:05,412 INFO L225 Difference]: With dead ends: 15832 [2020-07-20 12:36:05,413 INFO L226 Difference]: Without dead ends: 11586 [2020-07-20 12:36:05,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:36:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2020-07-20 12:36:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 8093. [2020-07-20 12:36:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8093 states. [2020-07-20 12:36:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8093 states to 8093 states and 12299 transitions. [2020-07-20 12:36:05,895 INFO L78 Accepts]: Start accepts. Automaton has 8093 states and 12299 transitions. Word has length 330 [2020-07-20 12:36:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:05,896 INFO L479 AbstractCegarLoop]: Abstraction has 8093 states and 12299 transitions. [2020-07-20 12:36:05,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:36:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8093 states and 12299 transitions. [2020-07-20 12:36:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:36:05,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:05,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:06,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:06,127 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1247460253, now seen corresponding path program 1 times [2020-07-20 12:36:06,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:06,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145790582] [2020-07-20 12:36:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:06,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:06,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145790582] [2020-07-20 12:36:06,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:06,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:06,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132994994] [2020-07-20 12:36:06,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:06,598 INFO L87 Difference]: Start difference. First operand 8093 states and 12299 transitions. Second operand 3 states. [2020-07-20 12:36:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:07,001 INFO L93 Difference]: Finished difference Result 16173 states and 24573 transitions. [2020-07-20 12:36:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:07,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:36:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:07,027 INFO L225 Difference]: With dead ends: 16173 [2020-07-20 12:36:07,028 INFO L226 Difference]: Without dead ends: 9971 [2020-07-20 12:36:07,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2020-07-20 12:36:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 8633. [2020-07-20 12:36:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8633 states. [2020-07-20 12:36:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 13191 transitions. [2020-07-20 12:36:07,568 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 13191 transitions. Word has length 330 [2020-07-20 12:36:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:07,568 INFO L479 AbstractCegarLoop]: Abstraction has 8633 states and 13191 transitions. [2020-07-20 12:36:07,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 13191 transitions. [2020-07-20 12:36:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 12:36:07,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:07,652 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:07,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:07,853 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -763365383, now seen corresponding path program 1 times [2020-07-20 12:36:07,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:07,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618225980] [2020-07-20 12:36:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:08,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:08,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618225980] [2020-07-20 12:36:08,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:08,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:08,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408600655] [2020-07-20 12:36:08,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:08,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:08,285 INFO L87 Difference]: Start difference. First operand 8633 states and 13191 transitions. Second operand 3 states. [2020-07-20 12:36:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:09,092 INFO L93 Difference]: Finished difference Result 24149 states and 36591 transitions. [2020-07-20 12:36:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:09,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 12:36:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:09,119 INFO L225 Difference]: With dead ends: 24149 [2020-07-20 12:36:09,119 INFO L226 Difference]: Without dead ends: 16416 [2020-07-20 12:36:09,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16416 states. [2020-07-20 12:36:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16416 to 8758. [2020-07-20 12:36:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8758 states. [2020-07-20 12:36:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13337 transitions. [2020-07-20 12:36:09,737 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13337 transitions. Word has length 331 [2020-07-20 12:36:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:09,737 INFO L479 AbstractCegarLoop]: Abstraction has 8758 states and 13337 transitions. [2020-07-20 12:36:09,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13337 transitions. [2020-07-20 12:36:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:36:09,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:09,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:09,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:09,949 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:09,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-20 12:36:09,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:09,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777430186] [2020-07-20 12:36:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:36:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:10,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:10,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777430186] [2020-07-20 12:36:10,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:10,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:36:10,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446220606] [2020-07-20 12:36:10,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:36:10,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:10,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:36:10,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:36:10,533 INFO L87 Difference]: Start difference. First operand 8758 states and 13337 transitions. Second operand 8 states. [2020-07-20 12:36:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:12,573 INFO L93 Difference]: Finished difference Result 19643 states and 30271 transitions. [2020-07-20 12:36:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:36:12,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-20 12:36:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:12,605 INFO L225 Difference]: With dead ends: 19643 [2020-07-20 12:36:12,606 INFO L226 Difference]: Without dead ends: 16573 [2020-07-20 12:36:12,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:36:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2020-07-20 12:36:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 10457. [2020-07-20 12:36:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-07-20 12:36:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 15924 transitions. [2020-07-20 12:36:13,187 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 15924 transitions. Word has length 332 [2020-07-20 12:36:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:13,188 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 15924 transitions. [2020-07-20 12:36:13,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:36:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 15924 transitions. [2020-07-20 12:36:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:36:13,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:13,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:13,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:13,399 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash -160876658, now seen corresponding path program 1 times [2020-07-20 12:36:13,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:13,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766702495] [2020-07-20 12:36:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:13,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:13,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766702495] [2020-07-20 12:36:13,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:13,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:13,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465016676] [2020-07-20 12:36:13,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:13,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:13,900 INFO L87 Difference]: Start difference. First operand 10457 states and 15924 transitions. Second operand 3 states. [2020-07-20 12:36:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:14,555 INFO L93 Difference]: Finished difference Result 22162 states and 33933 transitions. [2020-07-20 12:36:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:14,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 12:36:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:14,586 INFO L225 Difference]: With dead ends: 22162 [2020-07-20 12:36:14,586 INFO L226 Difference]: Without dead ends: 14009 [2020-07-20 12:36:14,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14009 states. [2020-07-20 12:36:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14009 to 12559. [2020-07-20 12:36:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12559 states. [2020-07-20 12:36:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12559 states to 12559 states and 19294 transitions. [2020-07-20 12:36:15,362 INFO L78 Accepts]: Start accepts. Automaton has 12559 states and 19294 transitions. Word has length 332 [2020-07-20 12:36:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:15,362 INFO L479 AbstractCegarLoop]: Abstraction has 12559 states and 19294 transitions. [2020-07-20 12:36:15,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 12559 states and 19294 transitions. [2020-07-20 12:36:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:36:15,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:15,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:15,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:15,997 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:15,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash 26974230, now seen corresponding path program 1 times [2020-07-20 12:36:15,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:15,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465704457] [2020-07-20 12:36:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:36:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:16,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:16,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465704457] [2020-07-20 12:36:16,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:16,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:36:16,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172732327] [2020-07-20 12:36:16,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:36:16,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:36:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:16,425 INFO L87 Difference]: Start difference. First operand 12559 states and 19294 transitions. Second operand 4 states. [2020-07-20 12:36:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:16,949 INFO L93 Difference]: Finished difference Result 23174 states and 35485 transitions. [2020-07-20 12:36:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:36:16,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 12:36:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:16,969 INFO L225 Difference]: With dead ends: 23174 [2020-07-20 12:36:16,970 INFO L226 Difference]: Without dead ends: 11478 [2020-07-20 12:36:17,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:36:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11478 states. [2020-07-20 12:36:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11478 to 11458. [2020-07-20 12:36:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-07-20 12:36:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 17608 transitions. [2020-07-20 12:36:17,699 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 17608 transitions. Word has length 332 [2020-07-20 12:36:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:17,699 INFO L479 AbstractCegarLoop]: Abstraction has 11458 states and 17608 transitions. [2020-07-20 12:36:17,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:36:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 17608 transitions. [2020-07-20 12:36:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 12:36:17,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:17,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:17,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:17,910 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-20 12:36:17,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:17,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979769916] [2020-07-20 12:36:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:18,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:36:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:18,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:18,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979769916] [2020-07-20 12:36:18,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:18,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:36:18,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475609011] [2020-07-20 12:36:18,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:36:18,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:36:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:18,383 INFO L87 Difference]: Start difference. First operand 11458 states and 17608 transitions. Second operand 4 states. [2020-07-20 12:36:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:19,458 INFO L93 Difference]: Finished difference Result 26120 states and 40662 transitions. [2020-07-20 12:36:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:36:19,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 12:36:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:19,485 INFO L225 Difference]: With dead ends: 26120 [2020-07-20 12:36:19,486 INFO L226 Difference]: Without dead ends: 20527 [2020-07-20 12:36:19,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20527 states. [2020-07-20 12:36:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20527 to 20525. [2020-07-20 12:36:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20525 states. [2020-07-20 12:36:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20525 states to 20525 states and 31568 transitions. [2020-07-20 12:36:20,814 INFO L78 Accepts]: Start accepts. Automaton has 20525 states and 31568 transitions. Word has length 333 [2020-07-20 12:36:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:20,815 INFO L479 AbstractCegarLoop]: Abstraction has 20525 states and 31568 transitions. [2020-07-20 12:36:20,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:36:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20525 states and 31568 transitions. [2020-07-20 12:36:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 12:36:20,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:20,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:21,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:21,028 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-20 12:36:21,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:21,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460647767] [2020-07-20 12:36:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:36:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:21,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:21,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460647767] [2020-07-20 12:36:21,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:21,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:36:21,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675219832] [2020-07-20 12:36:21,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:36:21,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:21,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:36:21,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:21,520 INFO L87 Difference]: Start difference. First operand 20525 states and 31568 transitions. Second operand 4 states. [2020-07-20 12:36:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:23,672 INFO L93 Difference]: Finished difference Result 60368 states and 92806 transitions. [2020-07-20 12:36:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:36:23,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 12:36:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:23,716 INFO L225 Difference]: With dead ends: 60368 [2020-07-20 12:36:23,717 INFO L226 Difference]: Without dead ends: 39915 [2020-07-20 12:36:23,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:36:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39915 states. [2020-07-20 12:36:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39915 to 39913. [2020-07-20 12:36:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39913 states. [2020-07-20 12:36:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39913 states to 39913 states and 61083 transitions. [2020-07-20 12:36:26,800 INFO L78 Accepts]: Start accepts. Automaton has 39913 states and 61083 transitions. Word has length 333 [2020-07-20 12:36:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:26,800 INFO L479 AbstractCegarLoop]: Abstraction has 39913 states and 61083 transitions. [2020-07-20 12:36:26,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:36:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 39913 states and 61083 transitions. [2020-07-20 12:36:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 12:36:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:26,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:27,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:27,021 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1906330768, now seen corresponding path program 1 times [2020-07-20 12:36:27,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:27,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96082098] [2020-07-20 12:36:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:27,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:27,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96082098] [2020-07-20 12:36:27,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:27,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:27,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160250885] [2020-07-20 12:36:27,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:27,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:27,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:27,653 INFO L87 Difference]: Start difference. First operand 39913 states and 61083 transitions. Second operand 3 states. [2020-07-20 12:36:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:31,705 INFO L93 Difference]: Finished difference Result 116533 states and 178115 transitions. [2020-07-20 12:36:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:31,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 12:36:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:31,806 INFO L225 Difference]: With dead ends: 116533 [2020-07-20 12:36:31,806 INFO L226 Difference]: Without dead ends: 77869 [2020-07-20 12:36:31,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77869 states. [2020-07-20 12:36:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77869 to 77867. [2020-07-20 12:36:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77867 states. [2020-07-20 12:36:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77867 states to 77867 states and 118696 transitions. [2020-07-20 12:36:37,587 INFO L78 Accepts]: Start accepts. Automaton has 77867 states and 118696 transitions. Word has length 335 [2020-07-20 12:36:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:37,588 INFO L479 AbstractCegarLoop]: Abstraction has 77867 states and 118696 transitions. [2020-07-20 12:36:37,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 77867 states and 118696 transitions. [2020-07-20 12:36:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:36:37,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:37,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:37,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:37,847 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -496610298, now seen corresponding path program 1 times [2020-07-20 12:36:37,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:37,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332628144] [2020-07-20 12:36:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:36:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:38,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:36:38,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:38,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:38,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332628144] [2020-07-20 12:36:38,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:38,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:36:38,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537815730] [2020-07-20 12:36:38,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:36:38,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:36:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:36:38,379 INFO L87 Difference]: Start difference. First operand 77867 states and 118696 transitions. Second operand 8 states. [2020-07-20 12:36:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:51,052 INFO L93 Difference]: Finished difference Result 194089 states and 298278 transitions. [2020-07-20 12:36:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:36:51,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-20 12:36:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:51,256 INFO L225 Difference]: With dead ends: 194089 [2020-07-20 12:36:51,256 INFO L226 Difference]: Without dead ends: 174805 [2020-07-20 12:36:51,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:36:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174805 states. [2020-07-20 12:37:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174805 to 94535. [2020-07-20 12:37:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94535 states. [2020-07-20 12:37:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94535 states to 94535 states and 144036 transitions. [2020-07-20 12:37:00,184 INFO L78 Accepts]: Start accepts. Automaton has 94535 states and 144036 transitions. Word has length 336 [2020-07-20 12:37:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:00,185 INFO L479 AbstractCegarLoop]: Abstraction has 94535 states and 144036 transitions. [2020-07-20 12:37:00,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:37:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 94535 states and 144036 transitions. [2020-07-20 12:37:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:37:00,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:00,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:00,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:00,426 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1180141058, now seen corresponding path program 1 times [2020-07-20 12:37:00,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:00,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654909407] [2020-07-20 12:37:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:37:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:37:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:37:00,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:00,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654909407] [2020-07-20 12:37:00,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:00,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:00,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690030220] [2020-07-20 12:37:00,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:00,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:00,835 INFO L87 Difference]: Start difference. First operand 94535 states and 144036 transitions. Second operand 3 states. [2020-07-20 12:37:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:09,745 INFO L93 Difference]: Finished difference Result 227675 states and 348798 transitions. [2020-07-20 12:37:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:37:09,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 12:37:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:09,969 INFO L225 Difference]: With dead ends: 227675 [2020-07-20 12:37:09,969 INFO L226 Difference]: Without dead ends: 140329 [2020-07-20 12:37:10,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140329 states. [2020-07-20 12:37:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140329 to 127767. [2020-07-20 12:37:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127767 states. [2020-07-20 12:37:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127767 states to 127767 states and 195876 transitions. [2020-07-20 12:37:21,332 INFO L78 Accepts]: Start accepts. Automaton has 127767 states and 195876 transitions. Word has length 336 [2020-07-20 12:37:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:21,333 INFO L479 AbstractCegarLoop]: Abstraction has 127767 states and 195876 transitions. [2020-07-20 12:37:21,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:37:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 127767 states and 195876 transitions. [2020-07-20 12:37:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 12:37:21,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:21,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:21,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:21,575 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1940830443, now seen corresponding path program 1 times [2020-07-20 12:37:21,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214501330] [2020-07-20 12:37:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:37:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:37:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:37:21,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:21,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214501330] [2020-07-20 12:37:21,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:21,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:21,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299615334] [2020-07-20 12:37:21,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:21,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:21,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:21,996 INFO L87 Difference]: Start difference. First operand 127767 states and 195876 transitions. Second operand 3 states. [2020-07-20 12:37:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:40,938 INFO L93 Difference]: Finished difference Result 375740 states and 575792 transitions. [2020-07-20 12:37:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:37:40,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 12:37:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:41,519 INFO L225 Difference]: With dead ends: 375740 [2020-07-20 12:37:41,520 INFO L226 Difference]: Without dead ends: 249320 [2020-07-20 12:37:41,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249320 states. [2020-07-20 12:38:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249320 to 249318. [2020-07-20 12:38:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249318 states. [2020-07-20 12:38:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249318 states to 249318 states and 380307 transitions. [2020-07-20 12:38:03,227 INFO L78 Accepts]: Start accepts. Automaton has 249318 states and 380307 transitions. Word has length 337 [2020-07-20 12:38:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:38:03,228 INFO L479 AbstractCegarLoop]: Abstraction has 249318 states and 380307 transitions. [2020-07-20 12:38:03,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:38:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 249318 states and 380307 transitions. [2020-07-20 12:38:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 12:38:03,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:38:03,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:38:03,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:38:03,514 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:38:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:38:03,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1726977432, now seen corresponding path program 1 times [2020-07-20 12:38:03,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:38:03,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266302625] [2020-07-20 12:38:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:38:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:38:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:38:03,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:38:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:38:03,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:38:03,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266302625] [2020-07-20 12:38:03,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:38:03,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:38:03,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044810246] [2020-07-20 12:38:03,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:38:03,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:38:03,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:38:03,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:38:03,942 INFO L87 Difference]: Start difference. First operand 249318 states and 380307 transitions. Second operand 4 states. [2020-07-20 12:38:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:38:37,473 INFO L93 Difference]: Finished difference Result 678958 states and 1033574 transitions. [2020-07-20 12:38:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:38:37,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 12:38:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:38:38,255 INFO L225 Difference]: With dead ends: 678958 [2020-07-20 12:38:38,255 INFO L226 Difference]: Without dead ends: 432932 [2020-07-20 12:38:38,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:38:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432932 states. [2020-07-20 12:39:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432932 to 243898. [2020-07-20 12:39:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243898 states. [2020-07-20 12:39:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243898 states to 243898 states and 371825 transitions. [2020-07-20 12:39:04,101 INFO L78 Accepts]: Start accepts. Automaton has 243898 states and 371825 transitions. Word has length 337 [2020-07-20 12:39:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:39:04,101 INFO L479 AbstractCegarLoop]: Abstraction has 243898 states and 371825 transitions. [2020-07-20 12:39:04,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:39:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 243898 states and 371825 transitions. [2020-07-20 12:39:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 12:39:04,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:39:04,180 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:39:04,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:39:04,381 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:39:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:39:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash 494961172, now seen corresponding path program 1 times [2020-07-20 12:39:04,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:39:04,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300063299] [2020-07-20 12:39:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:39:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:39:04,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:39:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:39:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:39:04,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:39:04,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300063299] [2020-07-20 12:39:04,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:39:04,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:39:04,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11425455] [2020-07-20 12:39:04,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:39:04,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:39:04,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:39:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:39:04,795 INFO L87 Difference]: Start difference. First operand 243898 states and 371825 transitions. Second operand 3 states. [2020-07-20 12:39:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:39:41,734 INFO L93 Difference]: Finished difference Result 675356 states and 1028070 transitions. [2020-07-20 12:39:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:39:41,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 12:39:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:39:42,433 INFO L225 Difference]: With dead ends: 675356 [2020-07-20 12:39:42,434 INFO L226 Difference]: Without dead ends: 442178 [2020-07-20 12:39:47,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:39:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442178 states. [2020-07-20 12:40:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442178 to 244379. [2020-07-20 12:40:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244379 states. [2020-07-20 12:40:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244379 states to 244379 states and 372423 transitions. [2020-07-20 12:40:08,351 INFO L78 Accepts]: Start accepts. Automaton has 244379 states and 372423 transitions. Word has length 340 [2020-07-20 12:40:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:08,351 INFO L479 AbstractCegarLoop]: Abstraction has 244379 states and 372423 transitions. [2020-07-20 12:40:08,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 244379 states and 372423 transitions. [2020-07-20 12:40:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 12:40:08,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:08,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:08,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:08,634 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:08,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1233391883, now seen corresponding path program 1 times [2020-07-20 12:40:08,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:08,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941421608] [2020-07-20 12:40:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:40:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:08,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:09,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:09,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941421608] [2020-07-20 12:40:09,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:09,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:09,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934434663] [2020-07-20 12:40:09,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:09,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:09,051 INFO L87 Difference]: Start difference. First operand 244379 states and 372423 transitions. Second operand 3 states. [2020-07-20 12:40:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:47,936 INFO L93 Difference]: Finished difference Result 668702 states and 1027223 transitions. [2020-07-20 12:40:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:47,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 12:40:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:48,634 INFO L225 Difference]: With dead ends: 668702 [2020-07-20 12:40:48,634 INFO L226 Difference]: Without dead ends: 436857 [2020-07-20 12:40:48,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436857 states. [2020-07-20 12:41:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436857 to 382255. [2020-07-20 12:41:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382255 states. [2020-07-20 12:41:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382255 states to 382255 states and 595672 transitions. [2020-07-20 12:41:27,497 INFO L78 Accepts]: Start accepts. Automaton has 382255 states and 595672 transitions. Word has length 341 [2020-07-20 12:41:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:27,498 INFO L479 AbstractCegarLoop]: Abstraction has 382255 states and 595672 transitions. [2020-07-20 12:41:27,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:41:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 382255 states and 595672 transitions. [2020-07-20 12:41:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 12:41:27,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:27,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:27,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:27,818 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:27,819 INFO L82 PathProgramCache]: Analyzing trace with hash -253048940, now seen corresponding path program 1 times [2020-07-20 12:41:27,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:27,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637859924] [2020-07-20 12:41:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:41:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:28,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:41:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:28,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:28,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637859924] [2020-07-20 12:41:28,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:28,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:41:28,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583995628] [2020-07-20 12:41:28,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:41:28,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:41:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:41:28,245 INFO L87 Difference]: Start difference. First operand 382255 states and 595672 transitions. Second operand 4 states. [2020-07-20 12:42:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:06,908 INFO L93 Difference]: Finished difference Result 718230 states and 1118171 transitions. [2020-07-20 12:42:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:42:06,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-20 12:42:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:07,471 INFO L225 Difference]: With dead ends: 718230 [2020-07-20 12:42:07,471 INFO L226 Difference]: Without dead ends: 341287 [2020-07-20 12:42:07,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:42:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341287 states. [2020-07-20 12:42:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341287 to 340960. [2020-07-20 12:42:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340960 states. [2020-07-20 12:42:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340960 states to 340960 states and 530438 transitions. [2020-07-20 12:42:42,967 INFO L78 Accepts]: Start accepts. Automaton has 340960 states and 530438 transitions. Word has length 341 [2020-07-20 12:42:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:42:42,967 INFO L479 AbstractCegarLoop]: Abstraction has 340960 states and 530438 transitions. [2020-07-20 12:42:42,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:42:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 340960 states and 530438 transitions. [2020-07-20 12:42:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:42:43,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:42:43,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:42:43,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:43,241 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:42:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:42:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1057024975, now seen corresponding path program 1 times [2020-07-20 12:42:43,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:42:43,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322256010] [2020-07-20 12:42:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:42:43,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:42:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:42:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:42:43,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:42:43,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322256010] [2020-07-20 12:42:43,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:42:43,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:42:43,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539848953] [2020-07-20 12:42:43,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:42:43,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:42:43,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:42:43,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:43,650 INFO L87 Difference]: Start difference. First operand 340960 states and 530438 transitions. Second operand 3 states. [2020-07-20 12:43:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:48,431 INFO L93 Difference]: Finished difference Result 994710 states and 1546472 transitions. [2020-07-20 12:43:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:48,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 12:43:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:49,534 INFO L225 Difference]: With dead ends: 994710 [2020-07-20 12:43:49,534 INFO L226 Difference]: Without dead ends: 665512 [2020-07-20 12:43:49,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665512 states. [2020-07-20 12:44:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665512 to 665510. [2020-07-20 12:44:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665510 states. [2020-07-20 12:44:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665510 states to 665510 states and 1027052 transitions. [2020-07-20 12:44:59,048 INFO L78 Accepts]: Start accepts. Automaton has 665510 states and 1027052 transitions. Word has length 342 [2020-07-20 12:44:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:44:59,048 INFO L479 AbstractCegarLoop]: Abstraction has 665510 states and 1027052 transitions. [2020-07-20 12:44:59,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:44:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 665510 states and 1027052 transitions. [2020-07-20 12:44:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:44:59,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:44:59,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:44:59,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:59,384 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:44:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:44:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1023408404, now seen corresponding path program 1 times [2020-07-20 12:44:59,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:44:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764480947] [2020-07-20 12:44:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:44:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 12:44:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:45:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:45:00,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:45:00,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764480947] [2020-07-20 12:45:00,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:45:00,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 12:45:00,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221925920] [2020-07-20 12:45:00,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 12:45:00,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:45:00,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 12:45:00,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 12:45:00,946 INFO L87 Difference]: Start difference. First operand 665510 states and 1027052 transitions. Second operand 9 states.