/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:10:43,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:10:43,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:10:43,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:10:43,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:10:43,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:10:43,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:10:43,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:10:43,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:10:43,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:10:43,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:10:43,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:10:43,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:10:43,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:10:43,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:10:43,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:10:43,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:10:43,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:10:43,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:10:43,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:10:43,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:10:43,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:10:43,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:10:43,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:10:43,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 23:10:43,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 23:10:43,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 23:10:43,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 23:10:43,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 23:10:43,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 23:10:43,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:10:43,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:10:43,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:10:43,795 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 23:10:43,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:10:43,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:10:43,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:10:43,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:10:43,812 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:10:43,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:10:43,812 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:10:43,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:10:43,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:10:43,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:10:43,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:10:43,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:10:43,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:10:43,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:10:43,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:10:43,814 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:10:43,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:10:43,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:10:43,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:10:43,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:10:43,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:10:43,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:10:43,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:10:43,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:10:43,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:10:43,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:10:43,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:43,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:10:43,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:10:43,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:10:44,115 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:10:44,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:10:44,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:10:44,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:10:44,133 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:10:44,134 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 23:10:44,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b42d56a37/ce29a5f35ef94149b0866908ff8cb6e1/FLAGa1472c70b [2020-07-20 23:10:44,868 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:10:44,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 23:10:44,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b42d56a37/ce29a5f35ef94149b0866908ff8cb6e1/FLAGa1472c70b [2020-07-20 23:10:45,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b42d56a37/ce29a5f35ef94149b0866908ff8cb6e1 [2020-07-20 23:10:45,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:10:45,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:10:45,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:10:45,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:10:45,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:10:45,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:10:45" (1/1) ... [2020-07-20 23:10:45,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0f554d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:45, skipping insertion in model container [2020-07-20 23:10:45,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:10:45" (1/1) ... [2020-07-20 23:10:45,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:10:45,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:10:46,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:10:46,919 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:10:48,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:10:48,577 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:10:48,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48 WrapperNode [2020-07-20 23:10:48,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:10:48,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:10:48,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:10:48,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:10:48,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (1/1) ... [2020-07-20 23:10:48,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:10:48,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:10:48,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:10:48,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:10:48,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (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 23:10:48,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:10:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:10:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:10:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:10:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:10:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:10:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 23:10:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:10:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:10:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:10:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:10:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:10:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:10:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:10:48,900 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:10:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:10:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:10:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 23:10:48,901 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:10:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:10:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:10:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:10:48,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:10:53,315 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:10:53,316 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:10:53,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:10:53 BoogieIcfgContainer [2020-07-20 23:10:53,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:10:53,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:10:53,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:10:53,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:10:53,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:10:45" (1/3) ... [2020-07-20 23:10:53,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d911e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:10:53, skipping insertion in model container [2020-07-20 23:10:53,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:48" (2/3) ... [2020-07-20 23:10:53,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d911e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:10:53, skipping insertion in model container [2020-07-20 23:10:53,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:10:53" (3/3) ... [2020-07-20 23:10:53,345 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 23:10:53,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:10:53,369 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 23:10:53,385 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 23:10:53,418 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:10:53,419 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:10:53,419 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:10:53,419 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:10:53,419 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:10:53,419 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:10:53,419 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:10:53,420 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:10:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-20 23:10:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 23:10:53,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:53,517 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 23:10:53,517 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-20 23:10:53,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:53,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229120189] [2020-07-20 23:10:53,534 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 23:10:54,207 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:10:54,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:54,830 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 23:10:54,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:54,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229120189] [2020-07-20 23:10:54,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:54,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:54,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960738978] [2020-07-20 23:10:54,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:54,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:54,862 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-20 23:10:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:55,385 INFO L93 Difference]: Finished difference Result 4461 states and 8055 transitions. [2020-07-20 23:10:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:10:55,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 23:10:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:55,432 INFO L225 Difference]: With dead ends: 4461 [2020-07-20 23:10:55,432 INFO L226 Difference]: Without dead ends: 2962 [2020-07-20 23:10:55,449 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 23:10:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-07-20 23:10:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2917. [2020-07-20 23:10:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-07-20 23:10:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4790 transitions. [2020-07-20 23:10:55,714 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4790 transitions. Word has length 493 [2020-07-20 23:10:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:55,718 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 4790 transitions. [2020-07-20 23:10:55,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4790 transitions. [2020-07-20 23:10:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 23:10:55,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:55,737 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 23:10:55,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:55,951 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:55,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1745979400, now seen corresponding path program 1 times [2020-07-20 23:10:55,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:55,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69579476] [2020-07-20 23:10:55,954 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 23:10:56,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:10:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:56,712 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 23:10:56,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:56,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69579476] [2020-07-20 23:10:56,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:56,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:56,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129527409] [2020-07-20 23:10:56,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:56,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:56,719 INFO L87 Difference]: Start difference. First operand 2917 states and 4790 transitions. Second operand 3 states. [2020-07-20 23:10:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:57,048 INFO L93 Difference]: Finished difference Result 8441 states and 13816 transitions. [2020-07-20 23:10:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:10:57,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-20 23:10:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:57,086 INFO L225 Difference]: With dead ends: 8441 [2020-07-20 23:10:57,087 INFO L226 Difference]: Without dead ends: 5753 [2020-07-20 23:10:57,095 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 23:10:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2020-07-20 23:10:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5710. [2020-07-20 23:10:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5710 states. [2020-07-20 23:10:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 9351 transitions. [2020-07-20 23:10:57,423 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 9351 transitions. Word has length 495 [2020-07-20 23:10:57,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:57,424 INFO L479 AbstractCegarLoop]: Abstraction has 5710 states and 9351 transitions. [2020-07-20 23:10:57,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:10:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 9351 transitions. [2020-07-20 23:10:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 23:10:57,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:57,441 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 23:10:57,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:57,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2031538529, now seen corresponding path program 1 times [2020-07-20 23:10:57,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:57,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752106947] [2020-07-20 23:10:57,658 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 23:10:58,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:10:58,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:58,221 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 23:10:58,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:58,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752106947] [2020-07-20 23:10:58,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:58,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:58,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340178677] [2020-07-20 23:10:58,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:58,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:58,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:58,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:58,224 INFO L87 Difference]: Start difference. First operand 5710 states and 9351 transitions. Second operand 3 states. [2020-07-20 23:10:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:58,600 INFO L93 Difference]: Finished difference Result 16874 states and 27590 transitions. [2020-07-20 23:10:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:10:58,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 23:10:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:58,663 INFO L225 Difference]: With dead ends: 16874 [2020-07-20 23:10:58,663 INFO L226 Difference]: Without dead ends: 11195 [2020-07-20 23:10:58,677 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 23:10:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2020-07-20 23:10:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 5736. [2020-07-20 23:10:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5736 states. [2020-07-20 23:10:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 9389 transitions. [2020-07-20 23:10:58,946 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 9389 transitions. Word has length 496 [2020-07-20 23:10:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:58,947 INFO L479 AbstractCegarLoop]: Abstraction has 5736 states and 9389 transitions. [2020-07-20 23:10:58,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:10:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 9389 transitions. [2020-07-20 23:10:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 23:10:58,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:58,963 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 23:10:59,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:59,178 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:59,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1933455501, now seen corresponding path program 1 times [2020-07-20 23:10:59,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:59,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825190016] [2020-07-20 23:10:59,179 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 23:10:59,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:59,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:00,109 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 23:11:00,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:00,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825190016] [2020-07-20 23:11:00,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:00,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:00,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970962817] [2020-07-20 23:11:00,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:00,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:00,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:00,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:00,113 INFO L87 Difference]: Start difference. First operand 5736 states and 9389 transitions. Second operand 4 states. [2020-07-20 23:11:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:00,539 INFO L93 Difference]: Finished difference Result 13543 states and 22348 transitions. [2020-07-20 23:11:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:00,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-20 23:11:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:00,585 INFO L225 Difference]: With dead ends: 13543 [2020-07-20 23:11:00,585 INFO L226 Difference]: Without dead ends: 6868 [2020-07-20 23:11:00,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 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 23:11:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6868 states. [2020-07-20 23:11:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6868 to 6825. [2020-07-20 23:11:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6825 states. [2020-07-20 23:11:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 11231 transitions. [2020-07-20 23:11:00,878 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 11231 transitions. Word has length 497 [2020-07-20 23:11:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:00,878 INFO L479 AbstractCegarLoop]: Abstraction has 6825 states and 11231 transitions. [2020-07-20 23:11:00,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 11231 transitions. [2020-07-20 23:11:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 23:11:00,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:00,902 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 23:11:01,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:01,116 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash 791346258, now seen corresponding path program 1 times [2020-07-20 23:11:01,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:01,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694295359] [2020-07-20 23:11:01,118 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 23:11:01,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:01,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:01,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:11:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:01,723 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 23:11:01,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:01,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694295359] [2020-07-20 23:11:01,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:01,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:11:01,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316919971] [2020-07-20 23:11:01,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:11:01,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:01,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:11:01,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:11:01,726 INFO L87 Difference]: Start difference. First operand 6825 states and 11231 transitions. Second operand 9 states. [2020-07-20 23:11:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:10,522 INFO L93 Difference]: Finished difference Result 32838 states and 52782 transitions. [2020-07-20 23:11:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:11:10,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 499 [2020-07-20 23:11:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:10,605 INFO L225 Difference]: With dead ends: 32838 [2020-07-20 23:11:10,605 INFO L226 Difference]: Without dead ends: 31789 [2020-07-20 23:11:10,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:11:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31789 states. [2020-07-20 23:11:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31789 to 13499. [2020-07-20 23:11:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13499 states. [2020-07-20 23:11:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13499 states to 13499 states and 21840 transitions. [2020-07-20 23:11:11,360 INFO L78 Accepts]: Start accepts. Automaton has 13499 states and 21840 transitions. Word has length 499 [2020-07-20 23:11:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:11,361 INFO L479 AbstractCegarLoop]: Abstraction has 13499 states and 21840 transitions. [2020-07-20 23:11:11,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:11:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 13499 states and 21840 transitions. [2020-07-20 23:11:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 23:11:11,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:11,390 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 23:11:11,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:11,603 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash 736798959, now seen corresponding path program 1 times [2020-07-20 23:11:11,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:11,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344885081] [2020-07-20 23:11:11,605 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 23:11:12,030 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:12,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:12,201 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 23:11:12,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:12,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344885081] [2020-07-20 23:11:12,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:12,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:12,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307729255] [2020-07-20 23:11:12,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:12,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:12,205 INFO L87 Difference]: Start difference. First operand 13499 states and 21840 transitions. Second operand 3 states. [2020-07-20 23:11:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:12,938 INFO L93 Difference]: Finished difference Result 28875 states and 46343 transitions. [2020-07-20 23:11:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:12,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 23:11:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:12,979 INFO L225 Difference]: With dead ends: 28875 [2020-07-20 23:11:12,979 INFO L226 Difference]: Without dead ends: 18614 [2020-07-20 23:11:13,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 23:11:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18614 states. [2020-07-20 23:11:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18614 to 15798. [2020-07-20 23:11:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15798 states. [2020-07-20 23:11:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15798 states to 15798 states and 25636 transitions. [2020-07-20 23:11:13,736 INFO L78 Accepts]: Start accepts. Automaton has 15798 states and 25636 transitions. Word has length 499 [2020-07-20 23:11:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:13,736 INFO L479 AbstractCegarLoop]: Abstraction has 15798 states and 25636 transitions. [2020-07-20 23:11:13,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 15798 states and 25636 transitions. [2020-07-20 23:11:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 23:11:13,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:13,757 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 23:11:13,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:13,971 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:13,972 INFO L82 PathProgramCache]: Analyzing trace with hash -160987480, now seen corresponding path program 1 times [2020-07-20 23:11:13,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:13,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486586084] [2020-07-20 23:11:13,974 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 23:11:14,927 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1906 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:15,202 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 23:11:15,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:15,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486586084] [2020-07-20 23:11:15,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:15,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:15,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855636961] [2020-07-20 23:11:15,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:15,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:15,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:15,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:15,204 INFO L87 Difference]: Start difference. First operand 15798 states and 25636 transitions. Second operand 3 states. [2020-07-20 23:11:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:16,195 INFO L93 Difference]: Finished difference Result 46617 states and 75575 transitions. [2020-07-20 23:11:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:16,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 23:11:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:16,255 INFO L225 Difference]: With dead ends: 46617 [2020-07-20 23:11:16,256 INFO L226 Difference]: Without dead ends: 31195 [2020-07-20 23:11:16,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 23:11:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31195 states. [2020-07-20 23:11:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31195 to 31089. [2020-07-20 23:11:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31089 states. [2020-07-20 23:11:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31089 states to 31089 states and 50267 transitions. [2020-07-20 23:11:17,268 INFO L78 Accepts]: Start accepts. Automaton has 31089 states and 50267 transitions. Word has length 499 [2020-07-20 23:11:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:17,269 INFO L479 AbstractCegarLoop]: Abstraction has 31089 states and 50267 transitions. [2020-07-20 23:11:17,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 31089 states and 50267 transitions. [2020-07-20 23:11:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 23:11:17,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:17,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:11:17,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:17,504 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1312362157, now seen corresponding path program 1 times [2020-07-20 23:11:17,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:17,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993216595] [2020-07-20 23:11:17,507 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 23:11:17,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:17,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:17,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:18,123 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 23:11:18,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:18,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993216595] [2020-07-20 23:11:18,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:18,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:18,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817949513] [2020-07-20 23:11:18,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:18,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:18,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:18,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:18,127 INFO L87 Difference]: Start difference. First operand 31089 states and 50267 transitions. Second operand 3 states. [2020-07-20 23:11:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:19,750 INFO L93 Difference]: Finished difference Result 93014 states and 150365 transitions. [2020-07-20 23:11:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:19,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 23:11:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:19,821 INFO L225 Difference]: With dead ends: 93014 [2020-07-20 23:11:19,821 INFO L226 Difference]: Without dead ends: 62039 [2020-07-20 23:11:19,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 23:11:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62039 states. [2020-07-20 23:11:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62039 to 31187. [2020-07-20 23:11:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31187 states. [2020-07-20 23:11:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31187 states to 31187 states and 50401 transitions. [2020-07-20 23:11:22,276 INFO L78 Accepts]: Start accepts. Automaton has 31187 states and 50401 transitions. Word has length 499 [2020-07-20 23:11:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:22,276 INFO L479 AbstractCegarLoop]: Abstraction has 31187 states and 50401 transitions. [2020-07-20 23:11:22,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31187 states and 50401 transitions. [2020-07-20 23:11:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 23:11:22,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:22,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:11:22,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:22,499 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:22,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1131026839, now seen corresponding path program 1 times [2020-07-20 23:11:22,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:22,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382615625] [2020-07-20 23:11:22,501 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 23:11:22,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:22,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:23,050 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 23:11:23,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:23,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382615625] [2020-07-20 23:11:23,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:23,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:23,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567690217] [2020-07-20 23:11:23,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:23,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:23,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:23,058 INFO L87 Difference]: Start difference. First operand 31187 states and 50401 transitions. Second operand 3 states. [2020-07-20 23:11:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:25,285 INFO L93 Difference]: Finished difference Result 92607 states and 149623 transitions. [2020-07-20 23:11:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:25,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 23:11:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:25,344 INFO L225 Difference]: With dead ends: 92607 [2020-07-20 23:11:25,344 INFO L226 Difference]: Without dead ends: 61911 [2020-07-20 23:11:25,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 23:11:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61911 states. [2020-07-20 23:11:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61911 to 31339. [2020-07-20 23:11:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31339 states. [2020-07-20 23:11:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31339 states to 31339 states and 50625 transitions. [2020-07-20 23:11:26,735 INFO L78 Accepts]: Start accepts. Automaton has 31339 states and 50625 transitions. Word has length 500 [2020-07-20 23:11:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:26,735 INFO L479 AbstractCegarLoop]: Abstraction has 31339 states and 50625 transitions. [2020-07-20 23:11:26,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 31339 states and 50625 transitions. [2020-07-20 23:11:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 23:11:26,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:26,754 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, 1] [2020-07-20 23:11:26,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:26,955 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1322532038, now seen corresponding path program 1 times [2020-07-20 23:11:26,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:26,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7379603] [2020-07-20 23:11:26,958 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 23:11:27,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1906 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:27,515 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 23:11:27,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:27,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7379603] [2020-07-20 23:11:27,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:27,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:27,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715604925] [2020-07-20 23:11:27,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:27,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:27,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:27,517 INFO L87 Difference]: Start difference. First operand 31339 states and 50625 transitions. Second operand 3 states. [2020-07-20 23:11:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:30,153 INFO L93 Difference]: Finished difference Result 93616 states and 151232 transitions. [2020-07-20 23:11:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:30,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 23:11:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:30,211 INFO L225 Difference]: With dead ends: 93616 [2020-07-20 23:11:30,211 INFO L226 Difference]: Without dead ends: 62470 [2020-07-20 23:11:30,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 23:11:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62470 states. [2020-07-20 23:11:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62470 to 31466. [2020-07-20 23:11:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31466 states. [2020-07-20 23:11:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31466 states to 31466 states and 50803 transitions. [2020-07-20 23:11:31,573 INFO L78 Accepts]: Start accepts. Automaton has 31466 states and 50803 transitions. Word has length 500 [2020-07-20 23:11:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:31,573 INFO L479 AbstractCegarLoop]: Abstraction has 31466 states and 50803 transitions. [2020-07-20 23:11:31,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 31466 states and 50803 transitions. [2020-07-20 23:11:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 23:11:31,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:31,598 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, 1, 1] [2020-07-20 23:11:31,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:31,810 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:31,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1141222616, now seen corresponding path program 1 times [2020-07-20 23:11:31,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:31,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073434561] [2020-07-20 23:11:31,812 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 23:11:32,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:32,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:32,374 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 23:11:32,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:32,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073434561] [2020-07-20 23:11:32,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:32,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:32,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153946966] [2020-07-20 23:11:32,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:32,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:32,377 INFO L87 Difference]: Start difference. First operand 31466 states and 50803 transitions. Second operand 3 states. [2020-07-20 23:11:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:34,440 INFO L93 Difference]: Finished difference Result 72468 states and 116763 transitions. [2020-07-20 23:11:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:34,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 23:11:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:34,486 INFO L225 Difference]: With dead ends: 72468 [2020-07-20 23:11:34,487 INFO L226 Difference]: Without dead ends: 48126 [2020-07-20 23:11:34,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 23:11:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48126 states. [2020-07-20 23:11:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48126 to 41272. [2020-07-20 23:11:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41272 states. [2020-07-20 23:11:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41272 states to 41272 states and 66951 transitions. [2020-07-20 23:11:37,383 INFO L78 Accepts]: Start accepts. Automaton has 41272 states and 66951 transitions. Word has length 501 [2020-07-20 23:11:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:37,384 INFO L479 AbstractCegarLoop]: Abstraction has 41272 states and 66951 transitions. [2020-07-20 23:11:37,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 41272 states and 66951 transitions. [2020-07-20 23:11:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 23:11:37,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:37,409 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, 1, 1] [2020-07-20 23:11:37,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:37,623 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:37,624 INFO L82 PathProgramCache]: Analyzing trace with hash 56197873, now seen corresponding path program 1 times [2020-07-20 23:11:37,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:37,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717275] [2020-07-20 23:11:37,625 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 23:11:38,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:38,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:38,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:38,267 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 23:11:38,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:38,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717275] [2020-07-20 23:11:38,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:38,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:38,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69090122] [2020-07-20 23:11:38,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:38,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:38,270 INFO L87 Difference]: Start difference. First operand 41272 states and 66951 transitions. Second operand 3 states. [2020-07-20 23:11:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:41,556 INFO L93 Difference]: Finished difference Result 120637 states and 195504 transitions. [2020-07-20 23:11:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:41,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 23:11:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:41,638 INFO L225 Difference]: With dead ends: 120637 [2020-07-20 23:11:41,638 INFO L226 Difference]: Without dead ends: 80909 [2020-07-20 23:11:41,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 23:11:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80909 states. [2020-07-20 23:11:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80909 to 80868. [2020-07-20 23:11:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80868 states. [2020-07-20 23:11:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80868 states to 80868 states and 130735 transitions. [2020-07-20 23:11:45,117 INFO L78 Accepts]: Start accepts. Automaton has 80868 states and 130735 transitions. Word has length 501 [2020-07-20 23:11:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:45,117 INFO L479 AbstractCegarLoop]: Abstraction has 80868 states and 130735 transitions. [2020-07-20 23:11:45,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 80868 states and 130735 transitions. [2020-07-20 23:11:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 23:11:46,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:46,810 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, 1, 1, 1] [2020-07-20 23:11:47,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:47,012 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1880531176, now seen corresponding path program 1 times [2020-07-20 23:11:47,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:47,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079264417] [2020-07-20 23:11:47,014 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 23:11:47,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:11:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:47,639 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 23:11:47,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:47,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079264417] [2020-07-20 23:11:47,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:47,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:47,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212677671] [2020-07-20 23:11:47,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:47,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:47,642 INFO L87 Difference]: Start difference. First operand 80868 states and 130735 transitions. Second operand 4 states. [2020-07-20 23:11:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:54,375 INFO L93 Difference]: Finished difference Result 238294 states and 385211 transitions. [2020-07-20 23:11:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:54,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 23:11:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:54,550 INFO L225 Difference]: With dead ends: 238294 [2020-07-20 23:11:54,550 INFO L226 Difference]: Without dead ends: 159132 [2020-07-20 23:11:54,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 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 23:11:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159132 states. [2020-07-20 23:12:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159132 to 158850. [2020-07-20 23:12:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158850 states. [2020-07-20 23:12:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158850 states to 158850 states and 256035 transitions. [2020-07-20 23:12:05,394 INFO L78 Accepts]: Start accepts. Automaton has 158850 states and 256035 transitions. Word has length 502 [2020-07-20 23:12:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:05,395 INFO L479 AbstractCegarLoop]: Abstraction has 158850 states and 256035 transitions. [2020-07-20 23:12:05,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:12:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 158850 states and 256035 transitions. [2020-07-20 23:12:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-20 23:12:05,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:05,457 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, 1, 1, 1, 1] [2020-07-20 23:12:05,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:05,666 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1646646296, now seen corresponding path program 1 times [2020-07-20 23:12:05,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:05,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251847059] [2020-07-20 23:12:05,667 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 23:12:06,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:12:06,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:06,572 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 23:12:06,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:06,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251847059] [2020-07-20 23:12:06,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:06,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:06,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96602738] [2020-07-20 23:12:06,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:06,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:06,574 INFO L87 Difference]: Start difference. First operand 158850 states and 256035 transitions. Second operand 3 states. [2020-07-20 23:12:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:22,817 INFO L93 Difference]: Finished difference Result 467871 states and 753521 transitions. [2020-07-20 23:12:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:12:22,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2020-07-20 23:12:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:23,227 INFO L225 Difference]: With dead ends: 467871 [2020-07-20 23:12:23,227 INFO L226 Difference]: Without dead ends: 312293 [2020-07-20 23:12:23,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 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 23:12:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312293 states. [2020-07-20 23:12:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312293 to 312155. [2020-07-20 23:12:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312155 states. [2020-07-20 23:12:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312155 states to 312155 states and 501315 transitions. [2020-07-20 23:12:43,385 INFO L78 Accepts]: Start accepts. Automaton has 312155 states and 501315 transitions. Word has length 503 [2020-07-20 23:12:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:43,385 INFO L479 AbstractCegarLoop]: Abstraction has 312155 states and 501315 transitions. [2020-07-20 23:12:43,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:12:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 312155 states and 501315 transitions. [2020-07-20 23:12:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-20 23:12:44,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:44,331 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, 1, 1, 1, 1] [2020-07-20 23:12:44,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:44,532 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -158101499, now seen corresponding path program 1 times [2020-07-20 23:12:44,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:44,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626743197] [2020-07-20 23:12:44,534 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 23:12:44,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:12:44,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:12:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:44,999 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 23:12:44,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:45,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626743197] [2020-07-20 23:12:45,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:45,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:12:45,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490525899] [2020-07-20 23:12:45,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:12:45,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:12:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:12:45,001 INFO L87 Difference]: Start difference. First operand 312155 states and 501315 transitions. Second operand 4 states. [2020-07-20 23:13:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:13:18,968 INFO L93 Difference]: Finished difference Result 903382 states and 1448017 transitions. [2020-07-20 23:13:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:13:18,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-07-20 23:13:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:13:25,704 INFO L225 Difference]: With dead ends: 903382 [2020-07-20 23:13:25,704 INFO L226 Difference]: Without dead ends: 602716 [2020-07-20 23:13:25,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 500 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 23:13:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602716 states. [2020-07-20 23:13:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602716 to 320390. [2020-07-20 23:13:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320390 states. [2020-07-20 23:13:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320390 states to 320390 states and 515659 transitions. [2020-07-20 23:13:50,449 INFO L78 Accepts]: Start accepts. Automaton has 320390 states and 515659 transitions. Word has length 503 [2020-07-20 23:13:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:13:50,450 INFO L479 AbstractCegarLoop]: Abstraction has 320390 states and 515659 transitions. [2020-07-20 23:13:50,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:13:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 320390 states and 515659 transitions. [2020-07-20 23:13:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 23:13:50,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:13:50,650 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, 1, 1, 1, 1, 1] [2020-07-20 23:13:50,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:50,851 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:13:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:13:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash 746858481, now seen corresponding path program 1 times [2020-07-20 23:13:50,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:13:50,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815411219] [2020-07-20 23:13:50,853 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 23:13:51,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:13:51,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:13:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1926 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:13:51,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:13:51,577 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 23:13:51,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:13:51,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815411219] [2020-07-20 23:13:51,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:13:51,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:13:51,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480093893] [2020-07-20 23:13:51,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:13:51,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:13:51,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:13:51,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:13:51,579 INFO L87 Difference]: Start difference. First operand 320390 states and 515659 transitions. Second operand 3 states. [2020-07-20 23:14:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:14:30,902 INFO L93 Difference]: Finished difference Result 931533 states and 1495510 transitions. [2020-07-20 23:14:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:14:30,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-20 23:14:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:14:31,744 INFO L225 Difference]: With dead ends: 931533 [2020-07-20 23:14:31,744 INFO L226 Difference]: Without dead ends: 623777 [2020-07-20 23:14:31,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 23:14:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623777 states. [2020-07-20 23:15:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623777 to 623495. [2020-07-20 23:15:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623495 states. [2020-07-20 23:15:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623495 states to 623495 states and 998454 transitions. [2020-07-20 23:15:25,453 INFO L78 Accepts]: Start accepts. Automaton has 623495 states and 998454 transitions. Word has length 504 [2020-07-20 23:15:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:15:25,454 INFO L479 AbstractCegarLoop]: Abstraction has 623495 states and 998454 transitions. [2020-07-20 23:15:25,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:15:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 623495 states and 998454 transitions. [2020-07-20 23:15:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 23:15:25,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:15:25,785 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:15:25,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:15:25,986 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:15:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:15:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1052628053, now seen corresponding path program 1 times [2020-07-20 23:15:25,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:15:25,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770239117] [2020-07-20 23:15:25,988 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 23:15:26,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:15:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:15:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:15:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:15:27,581 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 23:15:27,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:15:27,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770239117] [2020-07-20 23:15:27,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:15:27,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:15:27,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281001648] [2020-07-20 23:15:27,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:15:27,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:15:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:15:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:15:27,586 INFO L87 Difference]: Start difference. First operand 623495 states and 998454 transitions. Second operand 3 states. [2020-07-20 23:16:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:16:57,593 INFO L93 Difference]: Finished difference Result 1810749 states and 2890291 transitions. [2020-07-20 23:16:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:16:57,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-20 23:16:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:16:59,269 INFO L225 Difference]: With dead ends: 1810749 [2020-07-20 23:16:59,269 INFO L226 Difference]: Without dead ends: 1217281 [2020-07-20 23:16:59,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 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 23:17:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217281 states. [2020-07-20 23:18:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217281 to 628903. [2020-07-20 23:18:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628903 states. [2020-07-20 23:18:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628903 states to 628903 states and 1006417 transitions. [2020-07-20 23:18:11,231 INFO L78 Accepts]: Start accepts. Automaton has 628903 states and 1006417 transitions. Word has length 506 [2020-07-20 23:18:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:18:11,232 INFO L479 AbstractCegarLoop]: Abstraction has 628903 states and 1006417 transitions. [2020-07-20 23:18:11,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:18:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 628903 states and 1006417 transitions. [2020-07-20 23:18:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 23:18:11,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:18:11,558 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:18:11,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:18:11,759 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:18:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:18:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1636980973, now seen corresponding path program 1 times [2020-07-20 23:18:11,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:18:11,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824632190] [2020-07-20 23:18:11,761 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 23:18:12,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:18:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:18:12,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:18:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:18:12,253 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 23:18:12,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:18:12,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824632190] [2020-07-20 23:18:12,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:18:12,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:18:12,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911005762] [2020-07-20 23:18:12,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:18:12,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:18:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:18:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:18:12,255 INFO L87 Difference]: Start difference. First operand 628903 states and 1006417 transitions. Second operand 4 states. [2020-07-20 23:19:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:19:09,897 INFO L93 Difference]: Finished difference Result 1361094 states and 2180214 transitions. [2020-07-20 23:19:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:19:09,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-20 23:19:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:19:10,794 INFO L225 Difference]: With dead ends: 1361094 [2020-07-20 23:19:10,794 INFO L226 Difference]: Without dead ends: 687786 [2020-07-20 23:19:11,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 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 23:19:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687786 states. [2020-07-20 23:20:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687786 to 687648. [2020-07-20 23:20:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687648 states. [2020-07-20 23:20:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687648 states to 687648 states and 1098669 transitions. [2020-07-20 23:20:20,614 INFO L78 Accepts]: Start accepts. Automaton has 687648 states and 1098669 transitions. Word has length 507 [2020-07-20 23:20:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:20:20,614 INFO L479 AbstractCegarLoop]: Abstraction has 687648 states and 1098669 transitions. [2020-07-20 23:20:20,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:20:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 687648 states and 1098669 transitions. [2020-07-20 23:20:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 23:20:21,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:20:21,008 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:20:21,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:20:21,209 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:20:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:20:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2108167364, now seen corresponding path program 1 times [2020-07-20 23:20:21,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:20:21,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769706574] [2020-07-20 23:20:21,211 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 23:20:21,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:20:21,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:20:21,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:20:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:20:24,052 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 23:20:24,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:20:24,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769706574] [2020-07-20 23:20:24,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:20:24,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:20:24,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175539105] [2020-07-20 23:20:24,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:20:24,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:20:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:20:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:20:24,055 INFO L87 Difference]: Start difference. First operand 687648 states and 1098669 transitions. Second operand 3 states.