/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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:32:20,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:32:20,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:32:20,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:32:20,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:32:20,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:32:20,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:32:20,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:32:20,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:32:20,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:32:20,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:32:20,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:32:20,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:32:20,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:32:20,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:32:20,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:32:20,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:32:20,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:32:20,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:32:20,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:32:20,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:32:20,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:32:20,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:32:20,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:32:20,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 12:32:20,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 12:32:20,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 12:32:20,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 12:32:20,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 12:32:20,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 12:32:20,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 12:32:20,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 12:32:20,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 12:32:20,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 12:32:20,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 12:32:20,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 12:32:20,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 12:32:20,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 12:32:20,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:32:20,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:32:20,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:32:20,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:32:20,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:32:20,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:32:20,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:32:20,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:32:20,703 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:32:20,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:32:20,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:32:20,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:32:20,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:32:20,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:32:20,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:32:20,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:32:20,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:32:20,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:32:20,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:32:20,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:32:20,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:32:20,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:32:20,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:32:20,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:32:20,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:32:20,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:32:20,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:32:20,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:32:20,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:32:20,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:32:20,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:20,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:32:20,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:32:20,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:32:21,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:32:21,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:32:21,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:32:21,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:32:21,070 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:32:21,072 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:32:21,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/316f9ba08/d3879b00692945e58639791b95973a56/FLAGc77f5ef3c [2020-07-20 12:32:21,800 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:32:21,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:32:21,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/316f9ba08/d3879b00692945e58639791b95973a56/FLAGc77f5ef3c [2020-07-20 12:32:21,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/316f9ba08/d3879b00692945e58639791b95973a56 [2020-07-20 12:32:21,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:32:21,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:32:21,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:32:21,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:32:21,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:32:21,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:32:21" (1/1) ... [2020-07-20 12:32:21,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:21, skipping insertion in model container [2020-07-20 12:32:21,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:32:21" (1/1) ... [2020-07-20 12:32:21,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:32:22,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:32:22,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:32:22,973 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:32:23,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:32:23,455 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:32:23,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23 WrapperNode [2020-07-20 12:32:23,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:32:23,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:32:23,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:32:23,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:32:23,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... [2020-07-20 12:32:23,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:32:23,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:32:23,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:32:23,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:32:23,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:32:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:32:23,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:32:23,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:32:23,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:32:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 12:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:32:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:32:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:32:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:32:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:32:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:32:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:32:23,725 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:32:23,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:32:23,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:32:23,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:32:26,240 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:32:26,240 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:32:26,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:32:26 BoogieIcfgContainer [2020-07-20 12:32:26,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:32:26,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:32:26,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:32:26,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:32:26,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:32:21" (1/3) ... [2020-07-20 12:32:26,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652801f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:32:26, skipping insertion in model container [2020-07-20 12:32:26,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:23" (2/3) ... [2020-07-20 12:32:26,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652801f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:32:26, skipping insertion in model container [2020-07-20 12:32:26,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:32:26" (3/3) ... [2020-07-20 12:32:26,261 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:32:26,274 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:32:26,289 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:32:26,304 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:32:26,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:32:26,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:32:26,342 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:32:26,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:32:26,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:32:26,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:32:26,342 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:32:26,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:32:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-20 12:32:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:32:26,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:26,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:26,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-20 12:32:26,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:26,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905564764] [2020-07-20 12:32:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:27,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:32:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:27,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:27,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905564764] [2020-07-20 12:32:27,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:27,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:27,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363414489] [2020-07-20 12:32:27,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:27,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:27,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:27,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:27,285 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 3 states. [2020-07-20 12:32:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:27,573 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-20 12:32:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:27,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:32:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:27,601 INFO L225 Difference]: With dead ends: 1489 [2020-07-20 12:32:27,602 INFO L226 Difference]: Without dead ends: 1273 [2020-07-20 12:32:27,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-20 12:32:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-20 12:32:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-20 12:32:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-20 12:32:27,728 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-20 12:32:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:27,729 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-20 12:32:27,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-20 12:32:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:32:27,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:27,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:27,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:27,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:27,958 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-20 12:32:27,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:27,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833952193] [2020-07-20 12:32:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:28,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:32:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:28,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:28,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833952193] [2020-07-20 12:32:28,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:28,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:28,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813875215] [2020-07-20 12:32:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:28,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:28,501 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 3 states. [2020-07-20 12:32:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:28,712 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-20 12:32:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:28,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:32:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:28,727 INFO L225 Difference]: With dead ends: 2607 [2020-07-20 12:32:28,728 INFO L226 Difference]: Without dead ends: 2225 [2020-07-20 12:32:28,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-20 12:32:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-20 12:32:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-20 12:32:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-20 12:32:28,839 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-20 12:32:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:28,841 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-20 12:32:28,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-20 12:32:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:32:28,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:28,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:29,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:29,068 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:29,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:29,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-20 12:32:29,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:29,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855594691] [2020-07-20 12:32:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:32:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:29,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:29,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855594691] [2020-07-20 12:32:29,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:29,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:29,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210436551] [2020-07-20 12:32:29,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:29,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:29,683 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 3 states. [2020-07-20 12:32:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:29,966 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-20 12:32:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:29,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:32:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:29,994 INFO L225 Difference]: With dead ends: 4715 [2020-07-20 12:32:29,994 INFO L226 Difference]: Without dead ends: 4049 [2020-07-20 12:32:29,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-20 12:32:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-20 12:32:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-20 12:32:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-20 12:32:30,265 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-20 12:32:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:30,266 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-20 12:32:30,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-20 12:32:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:32:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:30,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:30,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:30,500 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-20 12:32:30,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:30,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168949883] [2020-07-20 12:32:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:32:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:31,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:31,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168949883] [2020-07-20 12:32:31,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:31,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:32:31,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099145787] [2020-07-20 12:32:31,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:32:31,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:32:31,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:32:31,129 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 4 states. [2020-07-20 12:32:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:31,840 INFO L93 Difference]: Finished difference Result 12001 states and 18571 transitions. [2020-07-20 12:32:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:32:31,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 12:32:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:31,881 INFO L225 Difference]: With dead ends: 12001 [2020-07-20 12:32:31,881 INFO L226 Difference]: Without dead ends: 7967 [2020-07-20 12:32:31,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:32:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2020-07-20 12:32:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 7965. [2020-07-20 12:32:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2020-07-20 12:32:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12270 transitions. [2020-07-20 12:32:32,300 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12270 transitions. Word has length 326 [2020-07-20 12:32:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:32,301 INFO L479 AbstractCegarLoop]: Abstraction has 7965 states and 12270 transitions. [2020-07-20 12:32:32,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:32:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12270 transitions. [2020-07-20 12:32:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:32:32,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:32,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:32,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:32,536 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash -806411643, now seen corresponding path program 1 times [2020-07-20 12:32:32,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:32,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77124611] [2020-07-20 12:32:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:32,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:33,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:33,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77124611] [2020-07-20 12:32:33,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:33,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:33,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836617164] [2020-07-20 12:32:33,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:33,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:33,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:33,110 INFO L87 Difference]: Start difference. First operand 7965 states and 12270 transitions. Second operand 3 states. [2020-07-20 12:32:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:33,754 INFO L93 Difference]: Finished difference Result 23423 states and 36009 transitions. [2020-07-20 12:32:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:33,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 12:32:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:33,822 INFO L225 Difference]: With dead ends: 23423 [2020-07-20 12:32:33,823 INFO L226 Difference]: Without dead ends: 15598 [2020-07-20 12:32:33,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2020-07-20 12:32:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 15596. [2020-07-20 12:32:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15596 states. [2020-07-20 12:32:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15596 states to 15596 states and 23874 transitions. [2020-07-20 12:32:34,844 INFO L78 Accepts]: Start accepts. Automaton has 15596 states and 23874 transitions. Word has length 328 [2020-07-20 12:32:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:34,845 INFO L479 AbstractCegarLoop]: Abstraction has 15596 states and 23874 transitions. [2020-07-20 12:32:34,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15596 states and 23874 transitions. [2020-07-20 12:32:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:32:34,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:34,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:35,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:35,091 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:35,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1426419210, now seen corresponding path program 1 times [2020-07-20 12:32:35,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:35,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518799670] [2020-07-20 12:32:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:35,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:35,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518799670] [2020-07-20 12:32:35,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:35,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:35,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951897372] [2020-07-20 12:32:35,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:35,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:35,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:35,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:35,516 INFO L87 Difference]: Start difference. First operand 15596 states and 23874 transitions. Second operand 3 states. [2020-07-20 12:32:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:36,541 INFO L93 Difference]: Finished difference Result 46629 states and 71346 transitions. [2020-07-20 12:32:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:36,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 12:32:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:36,611 INFO L225 Difference]: With dead ends: 46629 [2020-07-20 12:32:36,611 INFO L226 Difference]: Without dead ends: 31060 [2020-07-20 12:32:36,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31060 states. [2020-07-20 12:32:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31060 to 15607. [2020-07-20 12:32:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15607 states. [2020-07-20 12:32:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15607 states to 15607 states and 23889 transitions. [2020-07-20 12:32:38,329 INFO L78 Accepts]: Start accepts. Automaton has 15607 states and 23889 transitions. Word has length 328 [2020-07-20 12:32:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:38,329 INFO L479 AbstractCegarLoop]: Abstraction has 15607 states and 23889 transitions. [2020-07-20 12:32:38,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 15607 states and 23889 transitions. [2020-07-20 12:32:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 12:32:38,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:38,373 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] [2020-07-20 12:32:38,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:38,588 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:38,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1038980822, now seen corresponding path program 1 times [2020-07-20 12:32:38,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:38,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907273595] [2020-07-20 12:32:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:39,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:39,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907273595] [2020-07-20 12:32:39,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:39,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:39,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581994252] [2020-07-20 12:32:39,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:39,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:39,108 INFO L87 Difference]: Start difference. First operand 15607 states and 23889 transitions. Second operand 3 states. [2020-07-20 12:32:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:40,121 INFO L93 Difference]: Finished difference Result 46726 states and 71513 transitions. [2020-07-20 12:32:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:40,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-20 12:32:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:40,198 INFO L225 Difference]: With dead ends: 46726 [2020-07-20 12:32:40,199 INFO L226 Difference]: Without dead ends: 31169 [2020-07-20 12:32:40,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31169 states. [2020-07-20 12:32:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31169 to 15623. [2020-07-20 12:32:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-07-20 12:32:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23908 transitions. [2020-07-20 12:32:41,093 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23908 transitions. Word has length 329 [2020-07-20 12:32:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:41,094 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23908 transitions. [2020-07-20 12:32:41,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23908 transitions. [2020-07-20 12:32:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:32:41,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:41,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:41,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:41,341 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1758000128, now seen corresponding path program 1 times [2020-07-20 12:32:41,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:41,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017132778] [2020-07-20 12:32:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:42,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:42,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017132778] [2020-07-20 12:32:42,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:42,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:42,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111536250] [2020-07-20 12:32:42,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:42,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:42,056 INFO L87 Difference]: Start difference. First operand 15623 states and 23908 transitions. Second operand 3 states. [2020-07-20 12:32:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:42,825 INFO L93 Difference]: Finished difference Result 45980 states and 70241 transitions. [2020-07-20 12:32:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:42,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:32:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:42,900 INFO L225 Difference]: With dead ends: 45980 [2020-07-20 12:32:42,900 INFO L226 Difference]: Without dead ends: 30554 [2020-07-20 12:32:42,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30554 states. [2020-07-20 12:32:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30554 to 30552. [2020-07-20 12:32:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30552 states. [2020-07-20 12:32:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30552 states to 30552 states and 46444 transitions. [2020-07-20 12:32:44,173 INFO L78 Accepts]: Start accepts. Automaton has 30552 states and 46444 transitions. Word has length 330 [2020-07-20 12:32:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:44,174 INFO L479 AbstractCegarLoop]: Abstraction has 30552 states and 46444 transitions. [2020-07-20 12:32:44,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 30552 states and 46444 transitions. [2020-07-20 12:32:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:32:44,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:44,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:44,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:44,441 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash -730946851, now seen corresponding path program 1 times [2020-07-20 12:32:44,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:44,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830857847] [2020-07-20 12:32:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:44,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:32:44,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:44,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:44,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830857847] [2020-07-20 12:32:44,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:44,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:32:44,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552012002] [2020-07-20 12:32:44,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:32:44,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:32:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:32:44,865 INFO L87 Difference]: Start difference. First operand 30552 states and 46444 transitions. Second operand 4 states. [2020-07-20 12:32:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:46,267 INFO L93 Difference]: Finished difference Result 87242 states and 132392 transitions. [2020-07-20 12:32:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:32:46,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 12:32:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:46,416 INFO L225 Difference]: With dead ends: 87242 [2020-07-20 12:32:46,417 INFO L226 Difference]: Without dead ends: 57196 [2020-07-20 12:32:46,474 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 [2020-07-20 12:32:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57196 states. [2020-07-20 12:32:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57196 to 30801. [2020-07-20 12:32:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30801 states. [2020-07-20 12:32:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30801 states to 30801 states and 46863 transitions. [2020-07-20 12:32:48,561 INFO L78 Accepts]: Start accepts. Automaton has 30801 states and 46863 transitions. Word has length 330 [2020-07-20 12:32:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:48,561 INFO L479 AbstractCegarLoop]: Abstraction has 30801 states and 46863 transitions. [2020-07-20 12:32:48,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:32:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 30801 states and 46863 transitions. [2020-07-20 12:32:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 12:32:48,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:48,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:48,843 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 937296763, now seen corresponding path program 1 times [2020-07-20 12:32:48,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:48,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445666318] [2020-07-20 12:32:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:32:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:49,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:49,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445666318] [2020-07-20 12:32:49,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:49,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:32:49,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047695130] [2020-07-20 12:32:49,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:32:49,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:32:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:32:49,658 INFO L87 Difference]: Start difference. First operand 30801 states and 46863 transitions. Second operand 8 states. [2020-07-20 12:32:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:53,483 INFO L93 Difference]: Finished difference Result 96281 states and 148799 transitions. [2020-07-20 12:32:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:32:53,484 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-07-20 12:32:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:53,601 INFO L225 Difference]: With dead ends: 96281 [2020-07-20 12:32:53,602 INFO L226 Difference]: Without dead ends: 67515 [2020-07-20 12:32:53,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:32:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2020-07-20 12:32:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42117. [2020-07-20 12:32:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42117 states. [2020-07-20 12:32:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42117 states to 42117 states and 63927 transitions. [2020-07-20 12:32:56,591 INFO L78 Accepts]: Start accepts. Automaton has 42117 states and 63927 transitions. Word has length 331 [2020-07-20 12:32:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:56,591 INFO L479 AbstractCegarLoop]: Abstraction has 42117 states and 63927 transitions. [2020-07-20 12:32:56,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:32:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 42117 states and 63927 transitions. [2020-07-20 12:32:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 12:32:56,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:56,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:56,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:56,840 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:56,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:56,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1588208884, now seen corresponding path program 1 times [2020-07-20 12:32:56,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:56,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271435774] [2020-07-20 12:32:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:57,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:57,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:57,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271435774] [2020-07-20 12:32:57,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:57,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:57,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916861384] [2020-07-20 12:32:57,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:57,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:57,437 INFO L87 Difference]: Start difference. First operand 42117 states and 63927 transitions. Second operand 3 states. [2020-07-20 12:32:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:59,649 INFO L93 Difference]: Finished difference Result 96477 states and 147221 transitions. [2020-07-20 12:32:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:59,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 12:32:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:59,738 INFO L225 Difference]: With dead ends: 96477 [2020-07-20 12:32:59,738 INFO L226 Difference]: Without dead ends: 56115 [2020-07-20 12:32:59,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56115 states. [2020-07-20 12:33:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56115 to 50417. [2020-07-20 12:33:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50417 states. [2020-07-20 12:33:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50417 states to 50417 states and 77315 transitions. [2020-07-20 12:33:03,324 INFO L78 Accepts]: Start accepts. Automaton has 50417 states and 77315 transitions. Word has length 331 [2020-07-20 12:33:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:03,324 INFO L479 AbstractCegarLoop]: Abstraction has 50417 states and 77315 transitions. [2020-07-20 12:33:03,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:33:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 50417 states and 77315 transitions. [2020-07-20 12:33:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:33:03,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:03,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:03,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:03,568 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1591586090, now seen corresponding path program 1 times [2020-07-20 12:33:03,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:03,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617948535] [2020-07-20 12:33:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:03,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:33:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:03,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:03,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617948535] [2020-07-20 12:33:03,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:03,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:33:03,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525653734] [2020-07-20 12:33:03,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:33:03,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:03,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:33:03,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:03,980 INFO L87 Difference]: Start difference. First operand 50417 states and 77315 transitions. Second operand 3 states. [2020-07-20 12:33:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:08,343 INFO L93 Difference]: Finished difference Result 149739 states and 229296 transitions. [2020-07-20 12:33:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:33:08,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 12:33:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:08,465 INFO L225 Difference]: With dead ends: 149739 [2020-07-20 12:33:08,465 INFO L226 Difference]: Without dead ends: 100085 [2020-07-20 12:33:08,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100085 states. [2020-07-20 12:33:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100085 to 50521. [2020-07-20 12:33:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50521 states. [2020-07-20 12:33:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50521 states to 50521 states and 77451 transitions. [2020-07-20 12:33:12,911 INFO L78 Accepts]: Start accepts. Automaton has 50521 states and 77451 transitions. Word has length 332 [2020-07-20 12:33:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:12,911 INFO L479 AbstractCegarLoop]: Abstraction has 50521 states and 77451 transitions. [2020-07-20 12:33:12,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:33:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50521 states and 77451 transitions. [2020-07-20 12:33:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 12:33:12,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:12,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:13,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:13,134 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2104552222, now seen corresponding path program 1 times [2020-07-20 12:33:13,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:13,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744162355] [2020-07-20 12:33:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:33:13,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:13,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:13,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744162355] [2020-07-20 12:33:13,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:13,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:33:13,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886402745] [2020-07-20 12:33:13,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:33:13,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:33:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:13,534 INFO L87 Difference]: Start difference. First operand 50521 states and 77451 transitions. Second operand 3 states. [2020-07-20 12:33:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:17,426 INFO L93 Difference]: Finished difference Result 149872 states and 229461 transitions. [2020-07-20 12:33:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:33:17,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 12:33:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:17,879 INFO L225 Difference]: With dead ends: 149872 [2020-07-20 12:33:17,879 INFO L226 Difference]: Without dead ends: 100205 [2020-07-20 12:33:17,930 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 [2020-07-20 12:33:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100205 states. [2020-07-20 12:33:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100205 to 50663. [2020-07-20 12:33:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50663 states. [2020-07-20 12:33:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 77622 transitions. [2020-07-20 12:33:22,726 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 77622 transitions. Word has length 333 [2020-07-20 12:33:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:22,726 INFO L479 AbstractCegarLoop]: Abstraction has 50663 states and 77622 transitions. [2020-07-20 12:33:22,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:33:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 77622 transitions. [2020-07-20 12:33:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 12:33:22,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:22,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:22,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:22,948 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash 11426176, now seen corresponding path program 1 times [2020-07-20 12:33:22,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:22,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695100438] [2020-07-20 12:33:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:33:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:23,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:23,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695100438] [2020-07-20 12:33:23,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:23,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:33:23,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291544336] [2020-07-20 12:33:23,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:33:23,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:33:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:33:23,388 INFO L87 Difference]: Start difference. First operand 50663 states and 77622 transitions. Second operand 5 states. [2020-07-20 12:33:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:26,205 INFO L93 Difference]: Finished difference Result 99341 states and 152183 transitions. [2020-07-20 12:33:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:33:26,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-20 12:33:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:26,263 INFO L225 Difference]: With dead ends: 99341 [2020-07-20 12:33:26,263 INFO L226 Difference]: Without dead ends: 50663 [2020-07-20 12:33:26,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:33:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2020-07-20 12:33:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2020-07-20 12:33:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50663 states. [2020-07-20 12:33:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 77122 transitions. [2020-07-20 12:33:28,641 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 77122 transitions. Word has length 334 [2020-07-20 12:33:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:28,642 INFO L479 AbstractCegarLoop]: Abstraction has 50663 states and 77122 transitions. [2020-07-20 12:33:28,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:33:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 77122 transitions. [2020-07-20 12:33:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 12:33:28,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:28,665 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (15)] Forcibly destroying the process [2020-07-20 12:33:28,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:28,877 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash -468640859, now seen corresponding path program 1 times [2020-07-20 12:33:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:28,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452930630] [2020-07-20 12:33:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:33:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:29,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:29,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452930630] [2020-07-20 12:33:29,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:29,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:33:29,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147936616] [2020-07-20 12:33:29,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:33:29,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:33:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:33:29,394 INFO L87 Difference]: Start difference. First operand 50663 states and 77122 transitions. Second operand 4 states. [2020-07-20 12:33:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:33,896 INFO L93 Difference]: Finished difference Result 122927 states and 189724 transitions. [2020-07-20 12:33:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:33:33,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 12:33:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:34,016 INFO L225 Difference]: With dead ends: 122927 [2020-07-20 12:33:34,016 INFO L226 Difference]: Without dead ends: 96109 [2020-07-20 12:33:34,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:33:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96109 states. [2020-07-20 12:33:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96109 to 96107. [2020-07-20 12:33:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96107 states. [2020-07-20 12:33:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96107 states to 96107 states and 146342 transitions. [2020-07-20 12:33:39,667 INFO L78 Accepts]: Start accepts. Automaton has 96107 states and 146342 transitions. Word has length 334 [2020-07-20 12:33:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:39,668 INFO L479 AbstractCegarLoop]: Abstraction has 96107 states and 146342 transitions. [2020-07-20 12:33:39,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:33:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 96107 states and 146342 transitions. [2020-07-20 12:33:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 12:33:39,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:39,707 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] [2020-07-20 12:33:39,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:39,914 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 114577969, now seen corresponding path program 1 times [2020-07-20 12:33:39,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:39,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686774331] [2020-07-20 12:33:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:33:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:40,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:40,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686774331] [2020-07-20 12:33:40,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:40,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:33:40,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745194518] [2020-07-20 12:33:40,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:33:40,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:40,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:33:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:33:40,810 INFO L87 Difference]: Start difference. First operand 96107 states and 146342 transitions. Second operand 4 states. [2020-07-20 12:33:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:45,891 INFO L93 Difference]: Finished difference Result 192542 states and 292996 transitions. [2020-07-20 12:33:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:33:45,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 12:33:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:48,580 INFO L225 Difference]: With dead ends: 192542 [2020-07-20 12:33:48,580 INFO L226 Difference]: Without dead ends: 96954 [2020-07-20 12:33:48,649 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 [2020-07-20 12:33:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96954 states. [2020-07-20 12:33:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96954 to 96031. [2020-07-20 12:33:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96031 states. [2020-07-20 12:33:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96031 states to 96031 states and 146207 transitions. [2020-07-20 12:33:53,903 INFO L78 Accepts]: Start accepts. Automaton has 96031 states and 146207 transitions. Word has length 334 [2020-07-20 12:33:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:53,903 INFO L479 AbstractCegarLoop]: Abstraction has 96031 states and 146207 transitions. [2020-07-20 12:33:53,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:33:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 96031 states and 146207 transitions. [2020-07-20 12:33:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:33:53,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:53,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:54,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:54,145 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash -434706177, now seen corresponding path program 1 times [2020-07-20 12:33:54,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:54,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125047945] [2020-07-20 12:33:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:33:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:54,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:54,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125047945] [2020-07-20 12:33:54,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:54,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:33:54,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021617298] [2020-07-20 12:33:54,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:33:54,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:33:54,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:33:54,576 INFO L87 Difference]: Start difference. First operand 96031 states and 146207 transitions. Second operand 4 states. [2020-07-20 12:34:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:34:07,146 INFO L93 Difference]: Finished difference Result 282882 states and 429964 transitions. [2020-07-20 12:34:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:34:07,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-20 12:34:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:34:07,426 INFO L225 Difference]: With dead ends: 282882 [2020-07-20 12:34:07,426 INFO L226 Difference]: Without dead ends: 186990 [2020-07-20 12:34:07,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:34:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186990 states. [2020-07-20 12:34:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186990 to 186922. [2020-07-20 12:34:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186922 states. [2020-07-20 12:34:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186922 states to 186922 states and 282331 transitions. [2020-07-20 12:34:19,276 INFO L78 Accepts]: Start accepts. Automaton has 186922 states and 282331 transitions. Word has length 336 [2020-07-20 12:34:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:34:19,277 INFO L479 AbstractCegarLoop]: Abstraction has 186922 states and 282331 transitions. [2020-07-20 12:34:19,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:34:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 186922 states and 282331 transitions. [2020-07-20 12:34:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 12:34:19,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:34:19,355 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] [2020-07-20 12:34:19,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:19,556 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:34:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:34:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1136607777, now seen corresponding path program 1 times [2020-07-20 12:34:19,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:34:19,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380868382] [2020-07-20 12:34:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:34:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:34:19,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:34:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:34:20,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:34:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380868382] [2020-07-20 12:34:20,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:34:20,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:34:20,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597362204] [2020-07-20 12:34:20,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:34:20,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:34:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:34:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:34:20,012 INFO L87 Difference]: Start difference. First operand 186922 states and 282331 transitions. Second operand 3 states. [2020-07-20 12:34:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:34:42,541 INFO L93 Difference]: Finished difference Result 553406 states and 836000 transitions. [2020-07-20 12:34:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:34:42,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 12:34:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:34:43,088 INFO L225 Difference]: With dead ends: 553406 [2020-07-20 12:34:43,088 INFO L226 Difference]: Without dead ends: 367092 [2020-07-20 12:34:43,257 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 [2020-07-20 12:34:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367092 states. [2020-07-20 12:35:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367092 to 367090. [2020-07-20 12:35:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367090 states. [2020-07-20 12:35:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367090 states to 367090 states and 552269 transitions. [2020-07-20 12:35:17,203 INFO L78 Accepts]: Start accepts. Automaton has 367090 states and 552269 transitions. Word has length 338 [2020-07-20 12:35:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:17,203 INFO L479 AbstractCegarLoop]: Abstraction has 367090 states and 552269 transitions. [2020-07-20 12:35:17,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:35:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 367090 states and 552269 transitions. [2020-07-20 12:35:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 12:35:17,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:17,368 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] [2020-07-20 12:35:17,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:17,569 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1425161252, now seen corresponding path program 1 times [2020-07-20 12:35:17,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:17,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032546466] [2020-07-20 12:35:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:17,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:35:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:17,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:17,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032546466] [2020-07-20 12:35:17,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:17,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:35:17,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248505377] [2020-07-20 12:35:17,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:35:17,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:35:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:17,976 INFO L87 Difference]: Start difference. First operand 367090 states and 552269 transitions. Second operand 3 states. [2020-07-20 12:36:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:10,701 INFO L93 Difference]: Finished difference Result 1100709 states and 1655876 transitions. [2020-07-20 12:36:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:10,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 12:36:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:11,796 INFO L225 Difference]: With dead ends: 1100709 [2020-07-20 12:36:11,796 INFO L226 Difference]: Without dead ends: 733815 [2020-07-20 12:36:12,750 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 [2020-07-20 12:36:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733815 states. [2020-07-20 12:36:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733815 to 367147. [2020-07-20 12:36:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367147 states. [2020-07-20 12:36:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367147 states to 367147 states and 552347 transitions. [2020-07-20 12:36:54,292 INFO L78 Accepts]: Start accepts. Automaton has 367147 states and 552347 transitions. Word has length 338 [2020-07-20 12:36:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:54,293 INFO L479 AbstractCegarLoop]: Abstraction has 367147 states and 552347 transitions. [2020-07-20 12:36:54,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 367147 states and 552347 transitions. [2020-07-20 12:36:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 12:36:54,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:54,464 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] [2020-07-20 12:36:54,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:54,665 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash 214411520, now seen corresponding path program 1 times [2020-07-20 12:36:54,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:54,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030310422] [2020-07-20 12:36:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:55,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:55,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030310422] [2020-07-20 12:36:55,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:55,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:55,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937314805] [2020-07-20 12:36:55,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:55,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:55,100 INFO L87 Difference]: Start difference. First operand 367147 states and 552347 transitions. Second operand 3 states. [2020-07-20 12:37:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:53,975 INFO L93 Difference]: Finished difference Result 1100912 states and 1656196 transitions. [2020-07-20 12:37:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:37:53,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 12:37:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:55,098 INFO L225 Difference]: With dead ends: 1100912 [2020-07-20 12:37:55,098 INFO L226 Difference]: Without dead ends: 733963 [2020-07-20 12:37:55,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733963 states. [2020-07-20 12:38:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733963 to 367249. [2020-07-20 12:38:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367249 states. [2020-07-20 12:38:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367249 states to 367249 states and 552491 transitions. [2020-07-20 12:38:37,109 INFO L78 Accepts]: Start accepts. Automaton has 367249 states and 552491 transitions. Word has length 339 [2020-07-20 12:38:37,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:38:37,109 INFO L479 AbstractCegarLoop]: Abstraction has 367249 states and 552491 transitions. [2020-07-20 12:38:37,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:38:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 367249 states and 552491 transitions. [2020-07-20 12:38:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 12:38:37,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:38:37,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:38:37,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:38:37,488 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:38:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:38:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1871380838, now seen corresponding path program 1 times [2020-07-20 12:38:37,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:38:37,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742532904] [2020-07-20 12:38:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:38:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:38:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:38:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:38:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:38:38,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:38:38,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742532904] [2020-07-20 12:38:38,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:38:38,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:38:38,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402593634] [2020-07-20 12:38:38,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:38:38,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:38:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:38:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:38:38,600 INFO L87 Difference]: Start difference. First operand 367249 states and 552491 transitions. Second operand 3 states. [2020-07-20 12:39:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:39:32,664 INFO L93 Difference]: Finished difference Result 1043071 states and 1568285 transitions. [2020-07-20 12:39:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:39:32,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 12:39:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:39:33,802 INFO L225 Difference]: With dead ends: 1043071 [2020-07-20 12:39:33,802 INFO L226 Difference]: Without dead ends: 678137 [2020-07-20 12:39:34,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:39:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678137 states. [2020-07-20 12:40:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678137 to 678135. [2020-07-20 12:40:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678135 states. [2020-07-20 12:40:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678135 states to 678135 states and 1014168 transitions. [2020-07-20 12:40:42,724 INFO L78 Accepts]: Start accepts. Automaton has 678135 states and 1014168 transitions. Word has length 340 [2020-07-20 12:40:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:42,724 INFO L479 AbstractCegarLoop]: Abstraction has 678135 states and 1014168 transitions. [2020-07-20 12:40:42,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 678135 states and 1014168 transitions. [2020-07-20 12:40:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 12:40:43,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:43,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:43,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:43,232 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1452643785, now seen corresponding path program 1 times [2020-07-20 12:40:43,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:43,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667295327] [2020-07-20 12:40:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:40:43,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:43,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:43,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667295327] [2020-07-20 12:40:43,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:43,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:43,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804627741] [2020-07-20 12:40:43,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:43,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:43,697 INFO L87 Difference]: Start difference. First operand 678135 states and 1014168 transitions. Second operand 4 states. [2020-07-20 12:42:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:40,453 INFO L93 Difference]: Finished difference Result 1981568 states and 2962001 transitions. [2020-07-20 12:42:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:42:40,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 12:42:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:42,680 INFO L225 Difference]: With dead ends: 1981568 [2020-07-20 12:42:42,680 INFO L226 Difference]: Without dead ends: 1309585 [2020-07-20 12:42:43,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:42:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309585 states.