/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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:21:24,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:21:24,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:21:24,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:21:24,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:21:24,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:21:24,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:21:24,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:21:24,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:21:24,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:21:24,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:21:24,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:21:24,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:21:24,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:21:24,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:21:24,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:21:24,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:21:24,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:21:24,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:21:24,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:21:24,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:21:24,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:21:24,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:21:24,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:21:24,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:21:24,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:21:24,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:21:24,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:21:24,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:21:24,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:21:24,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:21:24,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:21:24,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:21:24,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:21:24,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:21:24,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:21:24,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:21:24,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:21:24,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:21:24,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:21:24,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:21:24,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:21:24,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:21:24,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:21:24,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:21:24,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:21:24,408 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:21:24,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:21:24,408 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:21:24,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:21:24,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:21:24,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:21:24,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:21:24,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:21:24,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:21:24,410 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:21:24,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:21:24,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:21:24,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:21:24,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:21:24,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:21:24,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:21:24,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:21:24,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:21:24,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:21:24,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:21:24,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:21:24,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:21:24,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:24,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:21:24,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:21:24,413 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 [2020-07-21 12:21:24,680 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:21:24,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:21:24,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:21:24,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:21:24,703 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:21:24,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:21:24,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72aff1737/f832cdbd7e074fdabfd28b6970e9a889/FLAGa821a5096 [2020-07-21 12:21:25,464 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:21:25,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:21:25,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72aff1737/f832cdbd7e074fdabfd28b6970e9a889/FLAGa821a5096 [2020-07-21 12:21:25,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72aff1737/f832cdbd7e074fdabfd28b6970e9a889 [2020-07-21 12:21:25,658 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:21:25,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:21:25,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:21:25,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:21:25,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:21:25,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:25,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33014c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25, skipping insertion in model container [2020-07-21 12:21:25,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:25,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:21:25,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:21:27,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:21:27,033 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:21:27,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:21:27,491 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:21:27,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27 WrapperNode [2020-07-21 12:21:27,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:21:27,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:21:27,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:21:27,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:21:27,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... [2020-07-21 12:21:27,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:21:27,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:21:27,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:21:27,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:21:27,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:21:27,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:21:27,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:21:27,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:21:27,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:21:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:21:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:21:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 12:21:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:21:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:21:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:21:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:21:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:21:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:21:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:21:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:21:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:21:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:21:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:21:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:21:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:21:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:21:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:21:30,539 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:21:30,539 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:21:30,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:21:30 BoogieIcfgContainer [2020-07-21 12:21:30,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:21:30,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:21:30,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:21:30,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:21:30,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:21:25" (1/3) ... [2020-07-21 12:21:30,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fe52e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:21:30, skipping insertion in model container [2020-07-21 12:21:30,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:27" (2/3) ... [2020-07-21 12:21:30,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fe52e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:21:30, skipping insertion in model container [2020-07-21 12:21:30,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:21:30" (3/3) ... [2020-07-21 12:21:30,559 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:21:30,570 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:21:30,580 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:21:30,595 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:21:30,625 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:21:30,625 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:21:30,626 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:21:30,626 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:21:30,626 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:21:30,626 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:21:30,626 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:21:30,626 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:21:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-21 12:21:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:30,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:30,695 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] [2020-07-21 12:21:30,696 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-21 12:21:30,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:30,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122551927] [2020-07-21 12:21:30,711 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 [2020-07-21 12:21:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:31,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:31,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:31,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122551927] [2020-07-21 12:21:31,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:31,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:31,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874930584] [2020-07-21 12:21:31,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:31,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:31,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:31,544 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 3 states. [2020-07-21 12:21:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:31,852 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-07-21 12:21:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:31,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:21:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:31,882 INFO L225 Difference]: With dead ends: 1527 [2020-07-21 12:21:31,882 INFO L226 Difference]: Without dead ends: 1311 [2020-07-21 12:21:31,889 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 [2020-07-21 12:21:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-07-21 12:21:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-07-21 12:21:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-07-21 12:21:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-07-21 12:21:32,022 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-07-21 12:21:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:32,024 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-07-21 12:21:32,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-07-21 12:21:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:32,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:32,034 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] [2020-07-21 12:21:32,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:32,250 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-07-21 12:21:32,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:32,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418212414] [2020-07-21 12:21:32,252 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 [2020-07-21 12:21:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:32,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:32,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418212414] [2020-07-21 12:21:32,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:32,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:32,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079381438] [2020-07-21 12:21:32,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:32,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:32,881 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 3 states. [2020-07-21 12:21:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:33,135 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-07-21 12:21:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:33,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:21:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:33,152 INFO L225 Difference]: With dead ends: 2683 [2020-07-21 12:21:33,153 INFO L226 Difference]: Without dead ends: 2301 [2020-07-21 12:21:33,160 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 [2020-07-21 12:21:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-07-21 12:21:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-07-21 12:21:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-07-21 12:21:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-07-21 12:21:33,262 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-07-21 12:21:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:33,264 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-07-21 12:21:33,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-07-21 12:21:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:33,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:33,278 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] [2020-07-21 12:21:33,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:33,527 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-07-21 12:21:33,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:33,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244647738] [2020-07-21 12:21:33,529 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 [2020-07-21 12:21:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:34,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:34,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244647738] [2020-07-21 12:21:34,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:34,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:34,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866032825] [2020-07-21 12:21:34,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:34,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:34,074 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 3 states. [2020-07-21 12:21:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:34,385 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-07-21 12:21:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:34,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:21:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:34,418 INFO L225 Difference]: With dead ends: 4867 [2020-07-21 12:21:34,419 INFO L226 Difference]: Without dead ends: 4201 [2020-07-21 12:21:34,422 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 [2020-07-21 12:21:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-07-21 12:21:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-07-21 12:21:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-07-21 12:21:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-07-21 12:21:34,636 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-07-21 12:21:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:34,637 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-07-21 12:21:34,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-07-21 12:21:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:34,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:34,657 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] [2020-07-21 12:21:34,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:34,872 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-07-21 12:21:34,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:34,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961472361] [2020-07-21 12:21:34,874 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 [2020-07-21 12:21:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:21:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:35,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:35,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961472361] [2020-07-21 12:21:35,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:35,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:35,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953359767] [2020-07-21 12:21:35,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:35,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:35,561 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 4 states. [2020-07-21 12:21:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:36,039 INFO L93 Difference]: Finished difference Result 12417 states and 19251 transitions. [2020-07-21 12:21:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:36,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 12:21:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:36,097 INFO L225 Difference]: With dead ends: 12417 [2020-07-21 12:21:36,097 INFO L226 Difference]: Without dead ends: 8231 [2020-07-21 12:21:36,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:21:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2020-07-21 12:21:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 8229. [2020-07-21 12:21:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-07-21 12:21:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12694 transitions. [2020-07-21 12:21:36,596 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12694 transitions. Word has length 330 [2020-07-21 12:21:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:36,596 INFO L479 AbstractCegarLoop]: Abstraction has 8229 states and 12694 transitions. [2020-07-21 12:21:36,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12694 transitions. [2020-07-21 12:21:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:21:36,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:36,620 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] [2020-07-21 12:21:36,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:36,834 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1672602794, now seen corresponding path program 1 times [2020-07-21 12:21:36,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:36,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981217973] [2020-07-21 12:21:36,836 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 [2020-07-21 12:21:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:37,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:37,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981217973] [2020-07-21 12:21:37,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:37,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:37,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643501392] [2020-07-21 12:21:37,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:37,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:37,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:37,387 INFO L87 Difference]: Start difference. First operand 8229 states and 12694 transitions. Second operand 3 states. [2020-07-21 12:21:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:38,239 INFO L93 Difference]: Finished difference Result 24215 states and 37281 transitions. [2020-07-21 12:21:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:38,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 12:21:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:38,351 INFO L225 Difference]: With dead ends: 24215 [2020-07-21 12:21:38,351 INFO L226 Difference]: Without dead ends: 16126 [2020-07-21 12:21:38,379 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 [2020-07-21 12:21:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16126 states. [2020-07-21 12:21:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16126 to 16124. [2020-07-21 12:21:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16124 states. [2020-07-21 12:21:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16124 states to 16124 states and 24722 transitions. [2020-07-21 12:21:39,212 INFO L78 Accepts]: Start accepts. Automaton has 16124 states and 24722 transitions. Word has length 332 [2020-07-21 12:21:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:39,218 INFO L479 AbstractCegarLoop]: Abstraction has 16124 states and 24722 transitions. [2020-07-21 12:21:39,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 16124 states and 24722 transitions. [2020-07-21 12:21:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:21:39,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:39,260 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] [2020-07-21 12:21:39,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:39,474 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1778588241, now seen corresponding path program 1 times [2020-07-21 12:21:39,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:39,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227371714] [2020-07-21 12:21:39,475 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 [2020-07-21 12:21:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:40,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:40,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227371714] [2020-07-21 12:21:40,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:40,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:40,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710714855] [2020-07-21 12:21:40,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:40,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:40,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:40,470 INFO L87 Difference]: Start difference. First operand 16124 states and 24722 transitions. Second operand 3 states. [2020-07-21 12:21:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:41,163 INFO L93 Difference]: Finished difference Result 48213 states and 73890 transitions. [2020-07-21 12:21:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:41,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 12:21:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:41,231 INFO L225 Difference]: With dead ends: 48213 [2020-07-21 12:21:41,231 INFO L226 Difference]: Without dead ends: 32116 [2020-07-21 12:21:41,261 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 [2020-07-21 12:21:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32116 states. [2020-07-21 12:21:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32116 to 16135. [2020-07-21 12:21:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16135 states. [2020-07-21 12:21:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 24737 transitions. [2020-07-21 12:21:42,008 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 24737 transitions. Word has length 332 [2020-07-21 12:21:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:42,008 INFO L479 AbstractCegarLoop]: Abstraction has 16135 states and 24737 transitions. [2020-07-21 12:21:42,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 24737 transitions. [2020-07-21 12:21:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 12:21:42,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:42,040 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] [2020-07-21 12:21:42,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:42,254 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1401798367, now seen corresponding path program 1 times [2020-07-21 12:21:42,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:42,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885923574] [2020-07-21 12:21:42,256 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 [2020-07-21 12:21:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:42,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:42,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885923574] [2020-07-21 12:21:42,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:42,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:42,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332285276] [2020-07-21 12:21:42,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:42,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:42,811 INFO L87 Difference]: Start difference. First operand 16135 states and 24737 transitions. Second operand 3 states. [2020-07-21 12:21:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:43,532 INFO L93 Difference]: Finished difference Result 48310 states and 74057 transitions. [2020-07-21 12:21:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:43,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 12:21:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:43,604 INFO L225 Difference]: With dead ends: 48310 [2020-07-21 12:21:43,605 INFO L226 Difference]: Without dead ends: 32225 [2020-07-21 12:21:43,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32225 states. [2020-07-21 12:21:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32225 to 16151. [2020-07-21 12:21:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-07-21 12:21:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24756 transitions. [2020-07-21 12:21:44,576 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24756 transitions. Word has length 333 [2020-07-21 12:21:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:44,577 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24756 transitions. [2020-07-21 12:21:44,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24756 transitions. [2020-07-21 12:21:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 12:21:44,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:44,611 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] [2020-07-21 12:21:44,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:44,827 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:44,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1472246491, now seen corresponding path program 1 times [2020-07-21 12:21:44,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:44,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356539901] [2020-07-21 12:21:44,828 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 [2020-07-21 12:21:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:45,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:45,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356539901] [2020-07-21 12:21:45,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:45,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:45,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832134323] [2020-07-21 12:21:45,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:45,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:45,392 INFO L87 Difference]: Start difference. First operand 16151 states and 24756 transitions. Second operand 3 states. [2020-07-21 12:21:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:45,970 INFO L93 Difference]: Finished difference Result 47564 states and 72785 transitions. [2020-07-21 12:21:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:45,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 12:21:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:46,032 INFO L225 Difference]: With dead ends: 47564 [2020-07-21 12:21:46,033 INFO L226 Difference]: Without dead ends: 31610 [2020-07-21 12:21:46,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31610 states. [2020-07-21 12:21:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31610 to 31608. [2020-07-21 12:21:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31608 states. [2020-07-21 12:21:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 48140 transitions. [2020-07-21 12:21:47,260 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 48140 transitions. Word has length 334 [2020-07-21 12:21:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:47,261 INFO L479 AbstractCegarLoop]: Abstraction has 31608 states and 48140 transitions. [2020-07-21 12:21:47,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 48140 transitions. [2020-07-21 12:21:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 12:21:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:47,302 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] [2020-07-21 12:21:47,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:47,516 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1502102914, now seen corresponding path program 1 times [2020-07-21 12:21:47,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:47,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224664171] [2020-07-21 12:21:47,518 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 [2020-07-21 12:21:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:21:47,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:48,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:48,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224664171] [2020-07-21 12:21:48,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:48,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:48,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248339268] [2020-07-21 12:21:48,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:48,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:48,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:48,030 INFO L87 Difference]: Start difference. First operand 31608 states and 48140 transitions. Second operand 4 states. [2020-07-21 12:21:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:50,205 INFO L93 Difference]: Finished difference Result 90298 states and 137296 transitions. [2020-07-21 12:21:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:50,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 12:21:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:50,285 INFO L225 Difference]: With dead ends: 90298 [2020-07-21 12:21:50,286 INFO L226 Difference]: Without dead ends: 59196 [2020-07-21 12:21:50,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:21:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59196 states. [2020-07-21 12:21:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59196 to 31857. [2020-07-21 12:21:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31857 states. [2020-07-21 12:21:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31857 states to 31857 states and 48559 transitions. [2020-07-21 12:21:51,493 INFO L78 Accepts]: Start accepts. Automaton has 31857 states and 48559 transitions. Word has length 334 [2020-07-21 12:21:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:51,494 INFO L479 AbstractCegarLoop]: Abstraction has 31857 states and 48559 transitions. [2020-07-21 12:21:51,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31857 states and 48559 transitions. [2020-07-21 12:21:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:21:51,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:51,513 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] [2020-07-21 12:21:51,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:51,720 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1975409793, now seen corresponding path program 1 times [2020-07-21 12:21:51,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:51,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776355467] [2020-07-21 12:21:51,721 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 [2020-07-21 12:21:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:21:52,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:52,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:52,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776355467] [2020-07-21 12:21:52,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:52,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:21:52,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713878722] [2020-07-21 12:21:52,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:21:52,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:21:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:21:52,369 INFO L87 Difference]: Start difference. First operand 31857 states and 48559 transitions. Second operand 8 states. [2020-07-21 12:21:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:57,646 INFO L93 Difference]: Finished difference Result 104401 states and 160979 transitions. [2020-07-21 12:21:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:21:57,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 12:21:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:57,727 INFO L225 Difference]: With dead ends: 104401 [2020-07-21 12:21:57,728 INFO L226 Difference]: Without dead ends: 74579 [2020-07-21 12:21:57,764 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 [2020-07-21 12:21:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74579 states. [2020-07-21 12:21:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74579 to 46533. [2020-07-21 12:21:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46533 states. [2020-07-21 12:21:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46533 states to 46533 states and 70487 transitions. [2020-07-21 12:21:59,685 INFO L78 Accepts]: Start accepts. Automaton has 46533 states and 70487 transitions. Word has length 336 [2020-07-21 12:21:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:59,686 INFO L479 AbstractCegarLoop]: Abstraction has 46533 states and 70487 transitions. [2020-07-21 12:21:59,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:21:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 46533 states and 70487 transitions. [2020-07-21 12:21:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:21:59,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:59,719 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] [2020-07-21 12:21:59,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:59,934 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:59,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1507143924, now seen corresponding path program 1 times [2020-07-21 12:21:59,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:59,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766578359] [2020-07-21 12:21:59,937 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 [2020-07-21 12:22:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:00,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:00,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:00,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766578359] [2020-07-21 12:22:00,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:00,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:00,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618382313] [2020-07-21 12:22:00,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:00,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:00,410 INFO L87 Difference]: Start difference. First operand 46533 states and 70487 transitions. Second operand 3 states. [2020-07-21 12:22:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:02,716 INFO L93 Difference]: Finished difference Result 110589 states and 167989 transitions. [2020-07-21 12:22:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:02,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 12:22:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:02,807 INFO L225 Difference]: With dead ends: 110589 [2020-07-21 12:22:02,807 INFO L226 Difference]: Without dead ends: 65811 [2020-07-21 12:22:02,875 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 [2020-07-21 12:22:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65811 states. [2020-07-21 12:22:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65811 to 54993. [2020-07-21 12:22:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54993 states. [2020-07-21 12:22:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54993 states to 54993 states and 84067 transitions. [2020-07-21 12:22:06,971 INFO L78 Accepts]: Start accepts. Automaton has 54993 states and 84067 transitions. Word has length 336 [2020-07-21 12:22:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:06,972 INFO L479 AbstractCegarLoop]: Abstraction has 54993 states and 84067 transitions. [2020-07-21 12:22:06,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 54993 states and 84067 transitions. [2020-07-21 12:22:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:22:07,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:07,007 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] [2020-07-21 12:22:07,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:07,221 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1980323331, now seen corresponding path program 1 times [2020-07-21 12:22:07,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:07,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23478406] [2020-07-21 12:22:07,223 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 [2020-07-21 12:22:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:07,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:07,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23478406] [2020-07-21 12:22:07,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:07,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:07,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851454579] [2020-07-21 12:22:07,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:07,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:07,685 INFO L87 Difference]: Start difference. First operand 54993 states and 84067 transitions. Second operand 3 states. [2020-07-21 12:22:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:13,488 INFO L93 Difference]: Finished difference Result 163467 states and 249552 transitions. [2020-07-21 12:22:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:13,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 12:22:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:13,594 INFO L225 Difference]: With dead ends: 163467 [2020-07-21 12:22:13,595 INFO L226 Difference]: Without dead ends: 109237 [2020-07-21 12:22:13,635 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 [2020-07-21 12:22:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109237 states. [2020-07-21 12:22:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109237 to 55097. [2020-07-21 12:22:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55097 states. [2020-07-21 12:22:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55097 states to 55097 states and 84203 transitions. [2020-07-21 12:22:16,342 INFO L78 Accepts]: Start accepts. Automaton has 55097 states and 84203 transitions. Word has length 336 [2020-07-21 12:22:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:16,342 INFO L479 AbstractCegarLoop]: Abstraction has 55097 states and 84203 transitions. [2020-07-21 12:22:16,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 55097 states and 84203 transitions. [2020-07-21 12:22:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 12:22:16,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:16,366 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] [2020-07-21 12:22:16,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:16,567 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash -769888141, now seen corresponding path program 1 times [2020-07-21 12:22:16,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:16,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627468011] [2020-07-21 12:22:16,569 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 [2020-07-21 12:22:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:16,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:17,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:17,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627468011] [2020-07-21 12:22:17,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:17,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:17,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411587400] [2020-07-21 12:22:17,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:17,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:17,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:17,039 INFO L87 Difference]: Start difference. First operand 55097 states and 84203 transitions. Second operand 3 states. [2020-07-21 12:22:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:21,243 INFO L93 Difference]: Finished difference Result 163600 states and 249717 transitions. [2020-07-21 12:22:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:23,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 12:22:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:23,127 INFO L225 Difference]: With dead ends: 163600 [2020-07-21 12:22:23,128 INFO L226 Difference]: Without dead ends: 109357 [2020-07-21 12:22:23,174 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 [2020-07-21 12:22:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109357 states. [2020-07-21 12:22:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109357 to 55239. [2020-07-21 12:22:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55239 states. [2020-07-21 12:22:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55239 states to 55239 states and 84374 transitions. [2020-07-21 12:22:25,974 INFO L78 Accepts]: Start accepts. Automaton has 55239 states and 84374 transitions. Word has length 337 [2020-07-21 12:22:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:25,974 INFO L479 AbstractCegarLoop]: Abstraction has 55239 states and 84374 transitions. [2020-07-21 12:22:25,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 55239 states and 84374 transitions. [2020-07-21 12:22:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 12:22:26,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:26,000 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] [2020-07-21 12:22:26,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:26,201 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1319224410, now seen corresponding path program 1 times [2020-07-21 12:22:26,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:26,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025193870] [2020-07-21 12:22:26,203 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 [2020-07-21 12:22:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:22:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:26,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:26,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025193870] [2020-07-21 12:22:26,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:26,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:22:26,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197903691] [2020-07-21 12:22:26,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:22:26,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:22:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:22:26,797 INFO L87 Difference]: Start difference. First operand 55239 states and 84374 transitions. Second operand 8 states. [2020-07-21 12:22:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:35,087 INFO L93 Difference]: Finished difference Result 167105 states and 257024 transitions. [2020-07-21 12:22:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:22:35,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 338 [2020-07-21 12:22:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:35,251 INFO L225 Difference]: With dead ends: 167105 [2020-07-21 12:22:35,251 INFO L226 Difference]: Without dead ends: 140455 [2020-07-21 12:22:35,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:22:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140455 states. [2020-07-21 12:22:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140455 to 80593. [2020-07-21 12:22:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80593 states. [2020-07-21 12:22:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80593 states to 80593 states and 123220 transitions. [2020-07-21 12:22:42,163 INFO L78 Accepts]: Start accepts. Automaton has 80593 states and 123220 transitions. Word has length 338 [2020-07-21 12:22:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:42,163 INFO L479 AbstractCegarLoop]: Abstraction has 80593 states and 123220 transitions. [2020-07-21 12:22:42,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:22:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 80593 states and 123220 transitions. [2020-07-21 12:22:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 12:22:42,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:42,198 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, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:42,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:42,399 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:42,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1178643344, now seen corresponding path program 1 times [2020-07-21 12:22:42,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:42,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102463136] [2020-07-21 12:22:42,401 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 [2020-07-21 12:22:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:42,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:42,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:42,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102463136] [2020-07-21 12:22:42,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:42,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:42,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131839691] [2020-07-21 12:22:42,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:42,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:42,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:42,902 INFO L87 Difference]: Start difference. First operand 80593 states and 123220 transitions. Second operand 3 states. [2020-07-21 12:22:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:48,917 INFO L93 Difference]: Finished difference Result 194837 states and 298942 transitions. [2020-07-21 12:22:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:48,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 12:22:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:49,067 INFO L225 Difference]: With dead ends: 194837 [2020-07-21 12:22:49,067 INFO L226 Difference]: Without dead ends: 116393 [2020-07-21 12:22:49,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116393 states. [2020-07-21 12:22:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116393 to 100167. [2020-07-21 12:22:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100167 states. [2020-07-21 12:22:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100167 states to 100167 states and 153666 transitions. [2020-07-21 12:22:58,142 INFO L78 Accepts]: Start accepts. Automaton has 100167 states and 153666 transitions. Word has length 338 [2020-07-21 12:22:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:58,142 INFO L479 AbstractCegarLoop]: Abstraction has 100167 states and 153666 transitions. [2020-07-21 12:22:58,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 100167 states and 153666 transitions. [2020-07-21 12:22:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 12:22:58,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:58,177 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] [2020-07-21 12:22:58,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:58,378 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:58,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1840473814, now seen corresponding path program 1 times [2020-07-21 12:22:58,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:58,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363168639] [2020-07-21 12:22:58,379 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 [2020-07-21 12:22:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:22:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:58,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:58,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363168639] [2020-07-21 12:22:58,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:58,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:22:58,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766552798] [2020-07-21 12:22:58,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:22:58,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:58,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:22:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:22:58,846 INFO L87 Difference]: Start difference. First operand 100167 states and 153666 transitions. Second operand 4 states. [2020-07-21 12:23:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:04,066 INFO L93 Difference]: Finished difference Result 192961 states and 295690 transitions. [2020-07-21 12:23:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:04,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 12:23:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:04,177 INFO L225 Difference]: With dead ends: 192961 [2020-07-21 12:23:04,177 INFO L226 Difference]: Without dead ends: 93770 [2020-07-21 12:23:04,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:23:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93770 states. [2020-07-21 12:23:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93770 to 93728. [2020-07-21 12:23:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93728 states. [2020-07-21 12:23:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93728 states to 93728 states and 143558 transitions. [2020-07-21 12:23:09,975 INFO L78 Accepts]: Start accepts. Automaton has 93728 states and 143558 transitions. Word has length 338 [2020-07-21 12:23:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:09,975 INFO L479 AbstractCegarLoop]: Abstraction has 93728 states and 143558 transitions. [2020-07-21 12:23:09,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93728 states and 143558 transitions. [2020-07-21 12:23:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 12:23:10,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:10,009 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] [2020-07-21 12:23:10,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:10,210 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1731573835, now seen corresponding path program 1 times [2020-07-21 12:23:10,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:10,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947062383] [2020-07-21 12:23:10,212 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 [2020-07-21 12:23:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:11,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:11,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947062383] [2020-07-21 12:23:11,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:11,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:11,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198296822] [2020-07-21 12:23:11,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:11,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:11,229 INFO L87 Difference]: Start difference. First operand 93728 states and 143558 transitions. Second operand 4 states. [2020-07-21 12:23:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:22,795 INFO L93 Difference]: Finished difference Result 244024 states and 377300 transitions. [2020-07-21 12:23:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:22,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 12:23:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:23,039 INFO L225 Difference]: With dead ends: 244024 [2020-07-21 12:23:23,040 INFO L226 Difference]: Without dead ends: 184630 [2020-07-21 12:23:23,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184630 states. [2020-07-21 12:23:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184630 to 184628. [2020-07-21 12:23:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184628 states. [2020-07-21 12:23:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184628 states to 184628 states and 282430 transitions. [2020-07-21 12:23:38,304 INFO L78 Accepts]: Start accepts. Automaton has 184628 states and 282430 transitions. Word has length 339 [2020-07-21 12:23:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:38,305 INFO L479 AbstractCegarLoop]: Abstraction has 184628 states and 282430 transitions. [2020-07-21 12:23:38,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 184628 states and 282430 transitions. [2020-07-21 12:23:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 12:23:38,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:38,373 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] [2020-07-21 12:23:38,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:38,580 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:38,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1980174633, now seen corresponding path program 1 times [2020-07-21 12:23:38,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:38,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832021542] [2020-07-21 12:23:38,581 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 [2020-07-21 12:23:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:39,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:39,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832021542] [2020-07-21 12:23:39,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:39,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:39,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405828177] [2020-07-21 12:23:39,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:39,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:39,155 INFO L87 Difference]: Start difference. First operand 184628 states and 282430 transitions. Second operand 4 states. [2020-07-21 12:24:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:00,870 INFO L93 Difference]: Finished difference Result 547709 states and 837283 transitions. [2020-07-21 12:24:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:00,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 12:24:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:01,784 INFO L225 Difference]: With dead ends: 547709 [2020-07-21 12:24:01,784 INFO L226 Difference]: Without dead ends: 363416 [2020-07-21 12:24:01,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:24:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363416 states. [2020-07-21 12:24:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363416 to 363414. [2020-07-21 12:24:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363414 states. [2020-07-21 12:24:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363414 states to 363414 states and 553136 transitions. [2020-07-21 12:24:36,380 INFO L78 Accepts]: Start accepts. Automaton has 363414 states and 553136 transitions. Word has length 339 [2020-07-21 12:24:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:36,380 INFO L479 AbstractCegarLoop]: Abstraction has 363414 states and 553136 transitions. [2020-07-21 12:24:36,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:24:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 363414 states and 553136 transitions. [2020-07-21 12:24:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 12:24:36,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:36,527 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] [2020-07-21 12:24:36,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:36,727 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash 448011604, now seen corresponding path program 1 times [2020-07-21 12:24:36,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:36,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476331450] [2020-07-21 12:24:36,729 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 [2020-07-21 12:24:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:37,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:37,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:37,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476331450] [2020-07-21 12:24:37,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:37,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:37,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838883629] [2020-07-21 12:24:37,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:37,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:37,241 INFO L87 Difference]: Start difference. First operand 363414 states and 553136 transitions. Second operand 3 states. [2020-07-21 12:25:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:27,643 INFO L93 Difference]: Finished difference Result 1072659 states and 1632612 transitions. [2020-07-21 12:25:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:25:27,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 12:25:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:29,377 INFO L225 Difference]: With dead ends: 1072659 [2020-07-21 12:25:29,377 INFO L226 Difference]: Without dead ends: 710633 [2020-07-21 12:25:29,700 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 [2020-07-21 12:25:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710633 states. [2020-07-21 12:26:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710633 to 710631. [2020-07-21 12:26:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710631 states. [2020-07-21 12:26:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710631 states to 710631 states and 1076559 transitions. [2020-07-21 12:26:38,399 INFO L78 Accepts]: Start accepts. Automaton has 710631 states and 1076559 transitions. Word has length 341 [2020-07-21 12:26:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:38,399 INFO L479 AbstractCegarLoop]: Abstraction has 710631 states and 1076559 transitions. [2020-07-21 12:26:38,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 710631 states and 1076559 transitions. [2020-07-21 12:26:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:26:38,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:38,687 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] [2020-07-21 12:26:38,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:38,888 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -3893075, now seen corresponding path program 1 times [2020-07-21 12:26:38,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:38,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372576417] [2020-07-21 12:26:38,890 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 [2020-07-21 12:26:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:39,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:39,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372576417] [2020-07-21 12:26:39,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:39,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:39,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208629582] [2020-07-21 12:26:39,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:39,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:39,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:39,374 INFO L87 Difference]: Start difference. First operand 710631 states and 1076559 transitions. Second operand 3 states. [2020-07-21 12:28:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:11,234 INFO L93 Difference]: Finished difference Result 1618271 states and 2443525 transitions. [2020-07-21 12:28:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:28:11,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 12:28:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:12,955 INFO L225 Difference]: With dead ends: 1618271 [2020-07-21 12:28:12,956 INFO L226 Difference]: Without dead ends: 1119934 [2020-07-21 12:28:13,370 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 [2020-07-21 12:28:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119934 states. [2020-07-21 12:29:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119934 to 710374. [2020-07-21 12:29:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710374 states. [2020-07-21 12:29:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710374 states to 710374 states and 1076123 transitions. [2020-07-21 12:29:36,049 INFO L78 Accepts]: Start accepts. Automaton has 710374 states and 1076123 transitions. Word has length 342 [2020-07-21 12:29:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:36,049 INFO L479 AbstractCegarLoop]: Abstraction has 710374 states and 1076123 transitions. [2020-07-21 12:29:36,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 710374 states and 1076123 transitions. [2020-07-21 12:29:36,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:29:36,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:36,337 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] [2020-07-21 12:29:36,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:36,538 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:36,539 INFO L82 PathProgramCache]: Analyzing trace with hash 685969943, now seen corresponding path program 1 times [2020-07-21 12:29:36,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:36,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327124720] [2020-07-21 12:29:36,540 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 [2020-07-21 12:29:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:38,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:38,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327124720] [2020-07-21 12:29:38,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:38,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:38,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041559966] [2020-07-21 12:29:38,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:38,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:38,378 INFO L87 Difference]: Start difference. First operand 710374 states and 1076123 transitions. Second operand 3 states. [2020-07-21 12:31:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:34,539 INFO L93 Difference]: Finished difference Result 2018835 states and 3052565 transitions. [2020-07-21 12:31:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:31:34,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 12:31:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:36,788 INFO L225 Difference]: With dead ends: 2018835 [2020-07-21 12:31:36,788 INFO L226 Difference]: Without dead ends: 1309069 [2020-07-21 12:31:37,387 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 [2020-07-21 12:31:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309069 states.