/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:35:40,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:35:40,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:35:40,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:35:40,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:35:40,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:35:40,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:35:40,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:35:40,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:35:40,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:35:40,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:35:40,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:35:40,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:35:40,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:35:40,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:35:40,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:35:40,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:35:40,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:35:40,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:35:40,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:35:40,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:35:40,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:35:40,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:35:40,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:35:40,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:35:40,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:35:40,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:35:40,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:35:40,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:35:40,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:35:40,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:35:40,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:35:40,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:35:40,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:35:40,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:35:40,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:35:40,752 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 18:35:40,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:35:40,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:35:40,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:35:40,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:35:40,768 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:35:40,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:35:40,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:35:40,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:35:40,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:35:40,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:35:40,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:35:40,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:35:40,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:35:40,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:35:40,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:35:40,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:35:40,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:35:40,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:35:40,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:35:40,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:35:40,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:35:40,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:35:40,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:35:40,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:35:40,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:35:40,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:35:40,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:40,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:35:40,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:35:40,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:35:41,098 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:35:41,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:35:41,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:35:41,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:35:41,117 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:35:41,118 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 18:35:41,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08d9c743e/2e15c979ea6d4d0b91b56bf19d26834e/FLAG63fe55803 [2020-07-20 18:35:41,935 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:35:41,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 18:35:41,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08d9c743e/2e15c979ea6d4d0b91b56bf19d26834e/FLAG63fe55803 [2020-07-20 18:35:42,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08d9c743e/2e15c979ea6d4d0b91b56bf19d26834e [2020-07-20 18:35:42,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:35:42,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:35:42,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:35:42,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:35:42,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:35:42,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:35:42" (1/1) ... [2020-07-20 18:35:42,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2cae4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:42, skipping insertion in model container [2020-07-20 18:35:42,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:35:42" (1/1) ... [2020-07-20 18:35:42,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:35:42,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:35:44,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:35:44,092 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:35:45,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:35:45,692 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:35:45,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45 WrapperNode [2020-07-20 18:35:45,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:35:45,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:35:45,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:35:45,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:35:45,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (1/1) ... [2020-07-20 18:35:45,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:35:45,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:35:45,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:35:45,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:35:45,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (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 18:35:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:35:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:35:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:35:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:35:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:35:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:35:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:35:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:35:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:35:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:35:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:35:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:35:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:35:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:35:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 18:35:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:35:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:35:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:35:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:35:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:35:50,264 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:35:50,264 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:35:50,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:35:50 BoogieIcfgContainer [2020-07-20 18:35:50,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:35:50,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:35:50,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:35:50,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:35:50,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:35:42" (1/3) ... [2020-07-20 18:35:50,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb535dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:35:50, skipping insertion in model container [2020-07-20 18:35:50,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:45" (2/3) ... [2020-07-20 18:35:50,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb535dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:35:50, skipping insertion in model container [2020-07-20 18:35:50,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:35:50" (3/3) ... [2020-07-20 18:35:50,287 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 18:35:50,298 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:35:50,307 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 18:35:50,321 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 18:35:50,351 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:35:50,352 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:35:50,352 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:35:50,352 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:35:50,352 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:35:50,352 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:35:50,352 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:35:50,353 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:35:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-20 18:35:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 18:35:50,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:50,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:50,451 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-20 18:35:50,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:50,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872367249] [2020-07-20 18:35:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:51,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:51,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:51,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:35:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:51,790 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 18:35:51,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:51,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872367249] [2020-07-20 18:35:51,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:51,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:35:51,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066474333] [2020-07-20 18:35:51,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:35:51,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:35:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:35:51,815 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-20 18:35:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:52,314 INFO L93 Difference]: Finished difference Result 4299 states and 7757 transitions. [2020-07-20 18:35:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:35:52,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 18:35:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:52,350 INFO L225 Difference]: With dead ends: 4299 [2020-07-20 18:35:52,351 INFO L226 Difference]: Without dead ends: 2882 [2020-07-20 18:35:52,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 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 18:35:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2020-07-20 18:35:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2825. [2020-07-20 18:35:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2020-07-20 18:35:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4647 transitions. [2020-07-20 18:35:52,573 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4647 transitions. Word has length 484 [2020-07-20 18:35:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:52,578 INFO L479 AbstractCegarLoop]: Abstraction has 2825 states and 4647 transitions. [2020-07-20 18:35:52,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:35:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4647 transitions. [2020-07-20 18:35:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 18:35:52,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:52,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:52,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:52,814 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash 340770728, now seen corresponding path program 1 times [2020-07-20 18:35:52,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:52,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675622858] [2020-07-20 18:35:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:53,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:53,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:53,708 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 18:35:53,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:53,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675622858] [2020-07-20 18:35:53,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:53,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:53,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375808216] [2020-07-20 18:35:53,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:53,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:53,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:53,713 INFO L87 Difference]: Start difference. First operand 2825 states and 4647 transitions. Second operand 3 states. [2020-07-20 18:35:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:54,098 INFO L93 Difference]: Finished difference Result 8152 states and 13360 transitions. [2020-07-20 18:35:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:54,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 18:35:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:54,132 INFO L225 Difference]: With dead ends: 8152 [2020-07-20 18:35:54,132 INFO L226 Difference]: Without dead ends: 5493 [2020-07-20 18:35:54,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 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 18:35:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2020-07-20 18:35:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 5436. [2020-07-20 18:35:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5436 states. [2020-07-20 18:35:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 8897 transitions. [2020-07-20 18:35:54,357 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 8897 transitions. Word has length 486 [2020-07-20 18:35:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:54,358 INFO L479 AbstractCegarLoop]: Abstraction has 5436 states and 8897 transitions. [2020-07-20 18:35:54,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 8897 transitions. [2020-07-20 18:35:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 18:35:54,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:54,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:54,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:54,595 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash 945523819, now seen corresponding path program 1 times [2020-07-20 18:35:54,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:54,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021956925] [2020-07-20 18:35:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:55,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:55,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:55,313 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 18:35:55,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:55,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021956925] [2020-07-20 18:35:55,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:55,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:55,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157356000] [2020-07-20 18:35:55,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:55,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:55,316 INFO L87 Difference]: Start difference. First operand 5436 states and 8897 transitions. Second operand 3 states. [2020-07-20 18:35:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:55,615 INFO L93 Difference]: Finished difference Result 15792 states and 25749 transitions. [2020-07-20 18:35:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:55,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-20 18:35:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:55,666 INFO L225 Difference]: With dead ends: 15792 [2020-07-20 18:35:55,666 INFO L226 Difference]: Without dead ends: 10617 [2020-07-20 18:35:55,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 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 18:35:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2020-07-20 18:35:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 5488. [2020-07-20 18:35:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5488 states. [2020-07-20 18:35:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 8977 transitions. [2020-07-20 18:35:55,950 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 8977 transitions. Word has length 487 [2020-07-20 18:35:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:55,950 INFO L479 AbstractCegarLoop]: Abstraction has 5488 states and 8977 transitions. [2020-07-20 18:35:55,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 8977 transitions. [2020-07-20 18:35:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 18:35:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:55,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:56,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:56,181 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1834032381, now seen corresponding path program 1 times [2020-07-20 18:35:56,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:56,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416845281] [2020-07-20 18:35:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:56,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:57,076 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 18:35:57,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:57,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416845281] [2020-07-20 18:35:57,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:57,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:57,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690506205] [2020-07-20 18:35:57,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:57,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:57,080 INFO L87 Difference]: Start difference. First operand 5488 states and 8977 transitions. Second operand 3 states. [2020-07-20 18:35:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:57,535 INFO L93 Difference]: Finished difference Result 16005 states and 26116 transitions. [2020-07-20 18:35:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:57,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 18:35:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:57,585 INFO L225 Difference]: With dead ends: 16005 [2020-07-20 18:35:57,586 INFO L226 Difference]: Without dead ends: 10777 [2020-07-20 18:35:57,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 18:35:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10777 states. [2020-07-20 18:35:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10777 to 10720. [2020-07-20 18:35:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10720 states. [2020-07-20 18:35:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10720 states to 10720 states and 17458 transitions. [2020-07-20 18:35:58,083 INFO L78 Accepts]: Start accepts. Automaton has 10720 states and 17458 transitions. Word has length 488 [2020-07-20 18:35:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:58,083 INFO L479 AbstractCegarLoop]: Abstraction has 10720 states and 17458 transitions. [2020-07-20 18:35:58,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10720 states and 17458 transitions. [2020-07-20 18:35:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 18:35:58,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:58,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:58,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:58,323 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash 44730760, now seen corresponding path program 1 times [2020-07-20 18:35:58,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:58,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799249134] [2020-07-20 18:35:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:58,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:35:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:58,990 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 18:35:58,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:58,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799249134] [2020-07-20 18:35:58,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:58,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:58,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644850250] [2020-07-20 18:35:58,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:58,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:58,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:58,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:58,996 INFO L87 Difference]: Start difference. First operand 10720 states and 17458 transitions. Second operand 3 states. [2020-07-20 18:35:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:59,521 INFO L93 Difference]: Finished difference Result 31176 states and 50598 transitions. [2020-07-20 18:35:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:59,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 18:35:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:59,573 INFO L225 Difference]: With dead ends: 31176 [2020-07-20 18:35:59,573 INFO L226 Difference]: Without dead ends: 20949 [2020-07-20 18:35:59,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 18:35:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20949 states. [2020-07-20 18:36:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20949 to 10860. [2020-07-20 18:36:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10860 states. [2020-07-20 18:36:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 17654 transitions. [2020-07-20 18:36:00,179 INFO L78 Accepts]: Start accepts. Automaton has 10860 states and 17654 transitions. Word has length 488 [2020-07-20 18:36:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:00,179 INFO L479 AbstractCegarLoop]: Abstraction has 10860 states and 17654 transitions. [2020-07-20 18:36:00,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10860 states and 17654 transitions. [2020-07-20 18:36:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 18:36:00,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:00,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:00,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:00,421 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1693969294, now seen corresponding path program 1 times [2020-07-20 18:36:00,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:00,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588100520] [2020-07-20 18:36:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:01,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:01,157 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 18:36:01,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:01,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588100520] [2020-07-20 18:36:01,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:01,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:01,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645652365] [2020-07-20 18:36:01,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:01,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:01,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:01,160 INFO L87 Difference]: Start difference. First operand 10860 states and 17654 transitions. Second operand 3 states. [2020-07-20 18:36:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:01,899 INFO L93 Difference]: Finished difference Result 31470 states and 51010 transitions. [2020-07-20 18:36:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:01,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-20 18:36:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:01,935 INFO L225 Difference]: With dead ends: 31470 [2020-07-20 18:36:01,935 INFO L226 Difference]: Without dead ends: 21157 [2020-07-20 18:36:01,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 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 18:36:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2020-07-20 18:36:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 11068. [2020-07-20 18:36:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11068 states. [2020-07-20 18:36:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11068 states to 11068 states and 17938 transitions. [2020-07-20 18:36:02,493 INFO L78 Accepts]: Start accepts. Automaton has 11068 states and 17938 transitions. Word has length 489 [2020-07-20 18:36:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:02,493 INFO L479 AbstractCegarLoop]: Abstraction has 11068 states and 17938 transitions. [2020-07-20 18:36:02,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 11068 states and 17938 transitions. [2020-07-20 18:36:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 18:36:02,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:02,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:02,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:02,730 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash 147667729, now seen corresponding path program 1 times [2020-07-20 18:36:02,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:02,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387077477] [2020-07-20 18:36:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:03,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:36:03,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:36:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:04,013 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 18:36:04,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:04,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387077477] [2020-07-20 18:36:04,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:04,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:36:04,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255413026] [2020-07-20 18:36:04,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:36:04,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:36:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:36:04,016 INFO L87 Difference]: Start difference. First operand 11068 states and 17938 transitions. Second operand 4 states. [2020-07-20 18:36:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:04,708 INFO L93 Difference]: Finished difference Result 16194 states and 26070 transitions. [2020-07-20 18:36:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:04,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 18:36:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:04,742 INFO L225 Difference]: With dead ends: 16194 [2020-07-20 18:36:04,743 INFO L226 Difference]: Without dead ends: 14465 [2020-07-20 18:36:04,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 487 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 18:36:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14465 states. [2020-07-20 18:36:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14465 to 14465. [2020-07-20 18:36:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14465 states. [2020-07-20 18:36:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14465 states to 14465 states and 23127 transitions. [2020-07-20 18:36:05,365 INFO L78 Accepts]: Start accepts. Automaton has 14465 states and 23127 transitions. Word has length 490 [2020-07-20 18:36:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:05,366 INFO L479 AbstractCegarLoop]: Abstraction has 14465 states and 23127 transitions. [2020-07-20 18:36:05,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 14465 states and 23127 transitions. [2020-07-20 18:36:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 18:36:05,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:05,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:05,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:05,606 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1647369883, now seen corresponding path program 1 times [2020-07-20 18:36:05,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:05,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400626301] [2020-07-20 18:36:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:06,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:06,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:06,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2906 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:06,287 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 18:36:06,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:06,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400626301] [2020-07-20 18:36:06,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:06,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:06,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971488684] [2020-07-20 18:36:06,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:06,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:06,290 INFO L87 Difference]: Start difference. First operand 14465 states and 23127 transitions. Second operand 3 states. [2020-07-20 18:36:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:06,855 INFO L93 Difference]: Finished difference Result 28077 states and 44544 transitions. [2020-07-20 18:36:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:06,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-20 18:36:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:06,885 INFO L225 Difference]: With dead ends: 28077 [2020-07-20 18:36:06,886 INFO L226 Difference]: Without dead ends: 18627 [2020-07-20 18:36:06,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 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 18:36:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18627 states. [2020-07-20 18:36:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18627 to 16089. [2020-07-20 18:36:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16089 states. [2020-07-20 18:36:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16089 states to 16089 states and 25799 transitions. [2020-07-20 18:36:07,527 INFO L78 Accepts]: Start accepts. Automaton has 16089 states and 25799 transitions. Word has length 490 [2020-07-20 18:36:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:07,528 INFO L479 AbstractCegarLoop]: Abstraction has 16089 states and 25799 transitions. [2020-07-20 18:36:07,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 16089 states and 25799 transitions. [2020-07-20 18:36:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 18:36:07,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:07,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:07,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:07,750 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:07,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1880444542, now seen corresponding path program 1 times [2020-07-20 18:36:07,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:07,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964725814] [2020-07-20 18:36:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:08,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:08,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:08,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:08,701 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 18:36:08,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:08,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964725814] [2020-07-20 18:36:08,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:08,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:08,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987981715] [2020-07-20 18:36:08,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:08,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:08,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:08,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:08,704 INFO L87 Difference]: Start difference. First operand 16089 states and 25799 transitions. Second operand 3 states. [2020-07-20 18:36:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:09,497 INFO L93 Difference]: Finished difference Result 46782 states and 74936 transitions. [2020-07-20 18:36:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:09,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-20 18:36:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:09,545 INFO L225 Difference]: With dead ends: 46782 [2020-07-20 18:36:09,545 INFO L226 Difference]: Without dead ends: 31226 [2020-07-20 18:36:09,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 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 18:36:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31226 states. [2020-07-20 18:36:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31226 to 31169. [2020-07-20 18:36:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31169 states. [2020-07-20 18:36:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31169 states to 31169 states and 49777 transitions. [2020-07-20 18:36:10,617 INFO L78 Accepts]: Start accepts. Automaton has 31169 states and 49777 transitions. Word has length 490 [2020-07-20 18:36:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:10,618 INFO L479 AbstractCegarLoop]: Abstraction has 31169 states and 49777 transitions. [2020-07-20 18:36:10,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 31169 states and 49777 transitions. [2020-07-20 18:36:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 18:36:10,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:10,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:10,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:10,846 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash 201719899, now seen corresponding path program 1 times [2020-07-20 18:36:10,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:10,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874829458] [2020-07-20 18:36:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:11,200 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:11,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:36:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:11,458 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 18:36:11,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:11,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874829458] [2020-07-20 18:36:11,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:11,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:36:11,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278811176] [2020-07-20 18:36:11,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:36:11,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:11,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:36:11,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:36:11,460 INFO L87 Difference]: Start difference. First operand 31169 states and 49777 transitions. Second operand 4 states. [2020-07-20 18:36:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:12,499 INFO L93 Difference]: Finished difference Result 69946 states and 112215 transitions. [2020-07-20 18:36:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:12,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 18:36:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:12,540 INFO L225 Difference]: With dead ends: 69946 [2020-07-20 18:36:12,541 INFO L226 Difference]: Without dead ends: 35995 [2020-07-20 18:36:12,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 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 18:36:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35995 states. [2020-07-20 18:36:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35995 to 35938. [2020-07-20 18:36:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35938 states. [2020-07-20 18:36:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35938 states to 35938 states and 57463 transitions. [2020-07-20 18:36:14,582 INFO L78 Accepts]: Start accepts. Automaton has 35938 states and 57463 transitions. Word has length 490 [2020-07-20 18:36:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:14,582 INFO L479 AbstractCegarLoop]: Abstraction has 35938 states and 57463 transitions. [2020-07-20 18:36:14,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 35938 states and 57463 transitions. [2020-07-20 18:36:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 18:36:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:14,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:14,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:14,831 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1107742702, now seen corresponding path program 1 times [2020-07-20 18:36:14,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:14,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063379428] [2020-07-20 18:36:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:15,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:36:15,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:36:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:15,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:15,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063379428] [2020-07-20 18:36:15,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:15,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:36:15,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022739309] [2020-07-20 18:36:15,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:36:15,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:36:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:36:15,534 INFO L87 Difference]: Start difference. First operand 35938 states and 57463 transitions. Second operand 4 states. [2020-07-20 18:36:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:17,678 INFO L93 Difference]: Finished difference Result 98187 states and 156073 transitions. [2020-07-20 18:36:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:17,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-20 18:36:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:17,749 INFO L225 Difference]: With dead ends: 98187 [2020-07-20 18:36:17,749 INFO L226 Difference]: Without dead ends: 67842 [2020-07-20 18:36:17,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 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 18:36:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67842 states. [2020-07-20 18:36:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67842 to 39553. [2020-07-20 18:36:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39553 states. [2020-07-20 18:36:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39553 states to 39553 states and 63704 transitions. [2020-07-20 18:36:20,625 INFO L78 Accepts]: Start accepts. Automaton has 39553 states and 63704 transitions. Word has length 492 [2020-07-20 18:36:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:20,625 INFO L479 AbstractCegarLoop]: Abstraction has 39553 states and 63704 transitions. [2020-07-20 18:36:20,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 39553 states and 63704 transitions. [2020-07-20 18:36:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 18:36:20,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:20,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:20,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:20,881 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash -370129229, now seen corresponding path program 1 times [2020-07-20 18:36:20,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:20,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095541500] [2020-07-20 18:36:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:21,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:21,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:21,537 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 18:36:21,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:21,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095541500] [2020-07-20 18:36:21,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:21,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:21,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539829350] [2020-07-20 18:36:21,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:21,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:21,542 INFO L87 Difference]: Start difference. First operand 39553 states and 63704 transitions. Second operand 3 states. [2020-07-20 18:36:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:23,180 INFO L93 Difference]: Finished difference Result 75063 states and 119452 transitions. [2020-07-20 18:36:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:23,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-20 18:36:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:23,245 INFO L225 Difference]: With dead ends: 75063 [2020-07-20 18:36:23,245 INFO L226 Difference]: Without dead ends: 52386 [2020-07-20 18:36:23,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 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 18:36:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52386 states. [2020-07-20 18:36:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52386 to 45209. [2020-07-20 18:36:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45209 states. [2020-07-20 18:36:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45209 states to 45209 states and 72960 transitions. [2020-07-20 18:36:25,060 INFO L78 Accepts]: Start accepts. Automaton has 45209 states and 72960 transitions. Word has length 492 [2020-07-20 18:36:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:25,060 INFO L479 AbstractCegarLoop]: Abstraction has 45209 states and 72960 transitions. [2020-07-20 18:36:25,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45209 states and 72960 transitions. [2020-07-20 18:36:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 18:36:25,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:25,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:25,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:25,291 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1124043707, now seen corresponding path program 1 times [2020-07-20 18:36:25,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:25,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506276168] [2020-07-20 18:36:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:36:25,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:36:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:26,051 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 18:36:26,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:26,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506276168] [2020-07-20 18:36:26,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:26,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:36:26,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064384305] [2020-07-20 18:36:26,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:36:26,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:26,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:36:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:36:26,053 INFO L87 Difference]: Start difference. First operand 45209 states and 72960 transitions. Second operand 5 states. [2020-07-20 18:36:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:29,213 INFO L93 Difference]: Finished difference Result 72414 states and 115878 transitions. [2020-07-20 18:36:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:36:29,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-20 18:36:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:29,268 INFO L225 Difference]: With dead ends: 72414 [2020-07-20 18:36:29,268 INFO L226 Difference]: Without dead ends: 45209 [2020-07-20 18:36:29,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 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 18:36:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45209 states. [2020-07-20 18:36:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45209 to 45209. [2020-07-20 18:36:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45209 states. [2020-07-20 18:36:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45209 states to 45209 states and 72546 transitions. [2020-07-20 18:36:31,151 INFO L78 Accepts]: Start accepts. Automaton has 45209 states and 72546 transitions. Word has length 493 [2020-07-20 18:36:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:31,152 INFO L479 AbstractCegarLoop]: Abstraction has 45209 states and 72546 transitions. [2020-07-20 18:36:31,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:36:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 45209 states and 72546 transitions. [2020-07-20 18:36:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 18:36:31,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:31,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:31,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:31,388 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 253092854, now seen corresponding path program 1 times [2020-07-20 18:36:31,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:31,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682072259] [2020-07-20 18:36:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:31,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 2912 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:36:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:32,146 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 18:36:32,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:32,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682072259] [2020-07-20 18:36:32,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:32,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:36:32,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303609766] [2020-07-20 18:36:32,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:36:32,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:32,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:36:32,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:36:32,148 INFO L87 Difference]: Start difference. First operand 45209 states and 72546 transitions. Second operand 4 states. [2020-07-20 18:36:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:35,497 INFO L93 Difference]: Finished difference Result 134374 states and 215574 transitions. [2020-07-20 18:36:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:35,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 18:36:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:35,642 INFO L225 Difference]: With dead ends: 134374 [2020-07-20 18:36:35,643 INFO L226 Difference]: Without dead ends: 89182 [2020-07-20 18:36:35,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 18:36:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89182 states. [2020-07-20 18:36:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89182 to 89128. [2020-07-20 18:36:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89128 states. [2020-07-20 18:36:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89128 states to 89128 states and 142463 transitions. [2020-07-20 18:36:40,849 INFO L78 Accepts]: Start accepts. Automaton has 89128 states and 142463 transitions. Word has length 493 [2020-07-20 18:36:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:40,850 INFO L479 AbstractCegarLoop]: Abstraction has 89128 states and 142463 transitions. [2020-07-20 18:36:40,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 89128 states and 142463 transitions. [2020-07-20 18:36:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 18:36:40,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:40,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:41,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:41,146 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1830330358, now seen corresponding path program 1 times [2020-07-20 18:36:41,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:41,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184548437] [2020-07-20 18:36:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:41,693 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:41,895 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 18:36:41,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:41,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184548437] [2020-07-20 18:36:41,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:41,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:41,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340269784] [2020-07-20 18:36:41,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:41,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:41,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:41,897 INFO L87 Difference]: Start difference. First operand 89128 states and 142463 transitions. Second operand 3 states. [2020-07-20 18:36:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:50,636 INFO L93 Difference]: Finished difference Result 261125 states and 417244 transitions. [2020-07-20 18:36:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:50,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-20 18:36:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:51,060 INFO L225 Difference]: With dead ends: 261125 [2020-07-20 18:36:51,060 INFO L226 Difference]: Without dead ends: 176297 [2020-07-20 18:36:51,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 18:36:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176297 states. [2020-07-20 18:36:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176297 to 176245. [2020-07-20 18:36:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176245 states. [2020-07-20 18:36:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176245 states to 176245 states and 280644 transitions. [2020-07-20 18:36:58,518 INFO L78 Accepts]: Start accepts. Automaton has 176245 states and 280644 transitions. Word has length 495 [2020-07-20 18:36:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:58,519 INFO L479 AbstractCegarLoop]: Abstraction has 176245 states and 280644 transitions. [2020-07-20 18:36:58,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 176245 states and 280644 transitions. [2020-07-20 18:36:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:36:58,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:58,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:58,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:58,840 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2088879661, now seen corresponding path program 1 times [2020-07-20 18:36:58,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:58,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572737159] [2020-07-20 18:36:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:01,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:37:01,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:37:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:02,111 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 18:37:02,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:02,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572737159] [2020-07-20 18:37:02,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:02,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:37:02,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082787051] [2020-07-20 18:37:02,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:37:02,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:02,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:37:02,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:02,113 INFO L87 Difference]: Start difference. First operand 176245 states and 280644 transitions. Second operand 3 states. [2020-07-20 18:37:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:37:16,020 INFO L93 Difference]: Finished difference Result 528638 states and 841764 transitions. [2020-07-20 18:37:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:37:16,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 18:37:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:37:16,484 INFO L225 Difference]: With dead ends: 528638 [2020-07-20 18:37:16,484 INFO L226 Difference]: Without dead ends: 352445 [2020-07-20 18:37:16,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 18:37:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352445 states. [2020-07-20 18:37:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352445 to 176292. [2020-07-20 18:37:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176292 states. [2020-07-20 18:37:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176292 states to 176292 states and 280718 transitions. [2020-07-20 18:37:29,952 INFO L78 Accepts]: Start accepts. Automaton has 176292 states and 280718 transitions. Word has length 496 [2020-07-20 18:37:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:37:29,952 INFO L479 AbstractCegarLoop]: Abstraction has 176292 states and 280718 transitions. [2020-07-20 18:37:29,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:37:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 176292 states and 280718 transitions. [2020-07-20 18:37:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 18:37:30,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:37:30,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:30,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:30,275 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:37:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:37:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1487169137, now seen corresponding path program 1 times [2020-07-20 18:37:30,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:37:30,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327246128] [2020-07-20 18:37:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:30,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:37:30,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:37:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:31,012 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 18:37:31,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:31,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327246128] [2020-07-20 18:37:31,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:31,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:37:31,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819332468] [2020-07-20 18:37:31,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:37:31,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:37:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:31,014 INFO L87 Difference]: Start difference. First operand 176292 states and 280718 transitions. Second operand 3 states. [2020-07-20 18:37:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:37:49,300 INFO L93 Difference]: Finished difference Result 519850 states and 828044 transitions. [2020-07-20 18:37:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:37:49,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 18:37:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:37:49,679 INFO L225 Difference]: With dead ends: 519850 [2020-07-20 18:37:49,679 INFO L226 Difference]: Without dead ends: 348627 [2020-07-20 18:37:49,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 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 18:37:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348627 states. [2020-07-20 18:38:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348627 to 348577. [2020-07-20 18:38:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348577 states. [2020-07-20 18:38:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348577 states to 348577 states and 553393 transitions. [2020-07-20 18:38:13,960 INFO L78 Accepts]: Start accepts. Automaton has 348577 states and 553393 transitions. Word has length 497 [2020-07-20 18:38:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:38:13,960 INFO L479 AbstractCegarLoop]: Abstraction has 348577 states and 553393 transitions. [2020-07-20 18:38:13,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:38:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 348577 states and 553393 transitions. [2020-07-20 18:38:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 18:38:14,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:38:14,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:14,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:14,418 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:38:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:38:14,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1116891222, now seen corresponding path program 1 times [2020-07-20 18:38:14,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:38:14,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164561016] [2020-07-20 18:38:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:14,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:38:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:38:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:38:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:38:14,907 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 18:38:14,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:38:14,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164561016] [2020-07-20 18:38:14,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:38:14,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:38:14,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645841354] [2020-07-20 18:38:14,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:38:14,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:38:14,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:38:14,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:38:14,915 INFO L87 Difference]: Start difference. First operand 348577 states and 553393 transitions. Second operand 3 states. [2020-07-20 18:38:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:38:58,509 INFO L93 Difference]: Finished difference Result 1045461 states and 1659703 transitions. [2020-07-20 18:38:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:38:58,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 18:38:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:38:59,331 INFO L225 Difference]: With dead ends: 1045461 [2020-07-20 18:38:59,332 INFO L226 Difference]: Without dead ends: 697023 [2020-07-20 18:38:59,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 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 18:39:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697023 states. [2020-07-20 18:39:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697023 to 348656. [2020-07-20 18:39:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348656 states. [2020-07-20 18:39:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348656 states to 348656 states and 553498 transitions. [2020-07-20 18:39:30,675 INFO L78 Accepts]: Start accepts. Automaton has 348656 states and 553498 transitions. Word has length 497 [2020-07-20 18:39:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:39:30,675 INFO L479 AbstractCegarLoop]: Abstraction has 348656 states and 553498 transitions. [2020-07-20 18:39:30,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:39:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 348656 states and 553498 transitions. [2020-07-20 18:39:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 18:39:30,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:39:30,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:39:31,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:31,126 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:39:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:39:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash -728663764, now seen corresponding path program 1 times [2020-07-20 18:39:31,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:39:31,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883790713] [2020-07-20 18:39:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:31,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:39:31,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:39:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:39:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:39:32,232 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 18:39:32,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:39:32,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883790713] [2020-07-20 18:39:32,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:39:32,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:39:32,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753075929] [2020-07-20 18:39:32,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:39:32,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:39:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:39:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:39:32,234 INFO L87 Difference]: Start difference. First operand 348656 states and 553498 transitions. Second operand 3 states. [2020-07-20 18:40:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:40:14,463 INFO L93 Difference]: Finished difference Result 1045621 states and 1659924 transitions. [2020-07-20 18:40:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:40:14,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-20 18:40:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:40:15,294 INFO L225 Difference]: With dead ends: 1045621 [2020-07-20 18:40:15,294 INFO L226 Difference]: Without dead ends: 697159 [2020-07-20 18:40:15,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 18:40:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697159 states. [2020-07-20 18:40:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697159 to 348792. [2020-07-20 18:40:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348792 states. [2020-07-20 18:40:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348792 states to 348792 states and 553690 transitions. [2020-07-20 18:40:50,245 INFO L78 Accepts]: Start accepts. Automaton has 348792 states and 553690 transitions. Word has length 498 [2020-07-20 18:40:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:40:50,246 INFO L479 AbstractCegarLoop]: Abstraction has 348792 states and 553690 transitions. [2020-07-20 18:40:50,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:40:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 348792 states and 553690 transitions. [2020-07-20 18:40:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 18:40:50,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:40:50,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:40:50,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:40:50,720 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:40:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:40:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -852792610, now seen corresponding path program 1 times [2020-07-20 18:40:50,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:40:50,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94624881] [2020-07-20 18:40:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:40:51,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:40:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:40:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:40:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:40:51,300 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 18:40:51,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:40:51,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94624881] [2020-07-20 18:40:51,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:40:51,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:40:51,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778848269] [2020-07-20 18:40:51,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:40:51,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:40:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:40:51,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:40:51,303 INFO L87 Difference]: Start difference. First operand 348792 states and 553690 transitions. Second operand 9 states. [2020-07-20 18:44:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:44:16,060 INFO L93 Difference]: Finished difference Result 2527243 states and 3986359 transitions. [2020-07-20 18:44:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 18:44:16,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 499 [2020-07-20 18:44:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:44:19,703 INFO L225 Difference]: With dead ends: 2527243 [2020-07-20 18:44:19,703 INFO L226 Difference]: Without dead ends: 2453032 [2020-07-20 18:44:20,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 18:44:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453032 states. [2020-07-20 18:46:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453032 to 788388. [2020-07-20 18:46:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788388 states. [2020-07-20 18:46:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788388 states to 788388 states and 1237370 transitions. [2020-07-20 18:46:01,846 INFO L78 Accepts]: Start accepts. Automaton has 788388 states and 1237370 transitions. Word has length 499 [2020-07-20 18:46:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:46:01,847 INFO L479 AbstractCegarLoop]: Abstraction has 788388 states and 1237370 transitions. [2020-07-20 18:46:01,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:46:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 788388 states and 1237370 transitions. [2020-07-20 18:46:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 18:46:02,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:46:02,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:46:02,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:46:02,548 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:46:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:46:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash -7718581, now seen corresponding path program 1 times [2020-07-20 18:46:02,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:46:02,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211444740] [2020-07-20 18:46:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:46:03,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:46:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:46:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 2923 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:46:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:46:04,402 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 18:46:04,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:46:04,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211444740] [2020-07-20 18:46:04,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:46:04,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:46:04,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963320] [2020-07-20 18:46:04,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:46:04,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:46:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:46:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:46:04,404 INFO L87 Difference]: Start difference. First operand 788388 states and 1237370 transitions. Second operand 3 states.