/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 BIGGEST_EQUIVALENCE_CLASS --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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:30:00,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:30:00,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:30:00,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 02:30:00,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:30:00,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:30:00,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:30:00,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:30:00,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:30:00,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:30:00,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:30:00,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:30:00,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:30:00,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:30:00,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:30:00,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:30:00,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:30:00,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:30:00,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:30:00,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:30:00,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:30:00,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:30:00,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:30:00,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:30:00,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:30:00,256 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:30:00,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:30:00,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:30:00,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:30:00,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:30:00,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:30:00,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:30:00,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:30:00,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:30:00,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:30:00,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:30:00,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:30:00,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:30:00,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:30:00,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:30:00,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:30:00,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:30:00,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:30:00,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:30:00,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:30:00,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:30:00,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:30:00,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:00,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:30:00,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:30:00,263 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 02:30:00,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:30:00,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:30:00,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:30:00,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:30:00,568 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:30:00,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 02:30:00,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9180ada7a/f572c71038024e8088d9157ded813613/FLAG4fe96aa70 [2020-07-21 02:30:01,401 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:30:01,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 02:30:01,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9180ada7a/f572c71038024e8088d9157ded813613/FLAG4fe96aa70 [2020-07-21 02:30:01,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9180ada7a/f572c71038024e8088d9157ded813613 [2020-07-21 02:30:01,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:30:01,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:30:01,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:30:01,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:30:01,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:30:01,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:30:01" (1/1) ... [2020-07-21 02:30:01,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ebb4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:01, skipping insertion in model container [2020-07-21 02:30:01,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:30:01" (1/1) ... [2020-07-21 02:30:01,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:30:01,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:30:04,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:30:04,226 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:30:06,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:30:06,059 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:30:06,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06 WrapperNode [2020-07-21 02:30:06,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:30:06,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:30:06,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:30:06,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:30:06,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... [2020-07-21 02:30:06,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:30:06,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:30:06,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:30:06,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:30:06,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:30:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:30:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:30:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:30:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:30:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:30:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:30:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:30:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:30:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:30:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:30:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:30:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:30:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:30:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:30:06,455 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:30:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:30:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:30:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:30:06,456 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:30:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:30:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:30:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:30:12,860 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:30:12,861 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:30:12,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:30:12 BoogieIcfgContainer [2020-07-21 02:30:12,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:30:12,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:30:12,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:30:12,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:30:12,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:30:01" (1/3) ... [2020-07-21 02:30:12,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193ec02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:30:12, skipping insertion in model container [2020-07-21 02:30:12,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:30:06" (2/3) ... [2020-07-21 02:30:12,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193ec02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:30:12, skipping insertion in model container [2020-07-21 02:30:12,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:30:12" (3/3) ... [2020-07-21 02:30:12,895 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 02:30:12,906 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:30:12,919 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 02:30:12,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 02:30:12,971 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:30:12,971 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:30:12,971 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:30:12,972 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:30:12,972 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:30:12,972 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:30:12,972 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:30:12,972 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:30:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-21 02:30:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 02:30:13,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:13,072 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] [2020-07-21 02:30:13,072 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-21 02:30:13,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:13,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816222415] [2020-07-21 02:30:13,086 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 [2020-07-21 02:30:13,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:13,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:13,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:30:13,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:13,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:13,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816222415] [2020-07-21 02:30:13,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:13,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:13,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782780515] [2020-07-21 02:30:13,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:13,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:13,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:13,925 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 3 states. [2020-07-21 02:30:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:14,287 INFO L93 Difference]: Finished difference Result 5960 states and 10322 transitions. [2020-07-21 02:30:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:14,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 02:30:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:14,329 INFO L225 Difference]: With dead ends: 5960 [2020-07-21 02:30:14,330 INFO L226 Difference]: Without dead ends: 4221 [2020-07-21 02:30:14,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2020-07-21 02:30:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4121. [2020-07-21 02:30:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-07-21 02:30:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 7128 transitions. [2020-07-21 02:30:14,547 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 7128 transitions. Word has length 322 [2020-07-21 02:30:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:14,549 INFO L479 AbstractCegarLoop]: Abstraction has 4121 states and 7128 transitions. [2020-07-21 02:30:14,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 7128 transitions. [2020-07-21 02:30:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:30:14,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:14,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:14,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:14,783 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -24233743, now seen corresponding path program 1 times [2020-07-21 02:30:14,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:14,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187033097] [2020-07-21 02:30:14,785 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 [2020-07-21 02:30:15,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:15,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:30:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:15,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:15,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187033097] [2020-07-21 02:30:15,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:15,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:15,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345448690] [2020-07-21 02:30:15,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:15,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:15,439 INFO L87 Difference]: Start difference. First operand 4121 states and 7128 transitions. Second operand 3 states. [2020-07-21 02:30:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:15,763 INFO L93 Difference]: Finished difference Result 10257 states and 17622 transitions. [2020-07-21 02:30:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:15,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 02:30:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:15,803 INFO L225 Difference]: With dead ends: 10257 [2020-07-21 02:30:15,804 INFO L226 Difference]: Without dead ends: 7153 [2020-07-21 02:30:15,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2020-07-21 02:30:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 6957. [2020-07-21 02:30:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6957 states. [2020-07-21 02:30:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 11956 transitions. [2020-07-21 02:30:16,067 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 11956 transitions. Word has length 342 [2020-07-21 02:30:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:16,071 INFO L479 AbstractCegarLoop]: Abstraction has 6957 states and 11956 transitions. [2020-07-21 02:30:16,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 11956 transitions. [2020-07-21 02:30:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-07-21 02:30:16,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:16,093 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] [2020-07-21 02:30:16,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:16,307 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 828287305, now seen corresponding path program 1 times [2020-07-21 02:30:16,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:16,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819727665] [2020-07-21 02:30:16,310 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 [2020-07-21 02:30:16,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:16,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:30:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:16,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:16,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819727665] [2020-07-21 02:30:16,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:16,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:16,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123658303] [2020-07-21 02:30:16,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:16,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:16,942 INFO L87 Difference]: Start difference. First operand 6957 states and 11956 transitions. Second operand 3 states. [2020-07-21 02:30:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:17,315 INFO L93 Difference]: Finished difference Result 17761 states and 30416 transitions. [2020-07-21 02:30:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:17,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-07-21 02:30:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:17,376 INFO L225 Difference]: With dead ends: 17761 [2020-07-21 02:30:17,376 INFO L226 Difference]: Without dead ends: 12249 [2020-07-21 02:30:17,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12249 states. [2020-07-21 02:30:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12249 to 11861. [2020-07-21 02:30:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11861 states. [2020-07-21 02:30:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 20284 transitions. [2020-07-21 02:30:17,805 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 20284 transitions. Word has length 362 [2020-07-21 02:30:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:17,806 INFO L479 AbstractCegarLoop]: Abstraction has 11861 states and 20284 transitions. [2020-07-21 02:30:17,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 20284 transitions. [2020-07-21 02:30:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 02:30:17,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:17,845 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] [2020-07-21 02:30:18,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:18,059 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:18,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1599264653, now seen corresponding path program 1 times [2020-07-21 02:30:18,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:18,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083377724] [2020-07-21 02:30:18,061 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 [2020-07-21 02:30:18,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2174 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:30:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:18,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:18,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083377724] [2020-07-21 02:30:18,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:18,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:18,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101684994] [2020-07-21 02:30:18,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:18,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:18,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:18,739 INFO L87 Difference]: Start difference. First operand 11861 states and 20284 transitions. Second operand 3 states. [2020-07-21 02:30:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:19,234 INFO L93 Difference]: Finished difference Result 30541 states and 52152 transitions. [2020-07-21 02:30:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:19,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-21 02:30:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:19,288 INFO L225 Difference]: With dead ends: 30541 [2020-07-21 02:30:19,288 INFO L226 Difference]: Without dead ends: 20905 [2020-07-21 02:30:19,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2020-07-21 02:30:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 20133. [2020-07-21 02:30:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20133 states. [2020-07-21 02:30:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20133 states to 20133 states and 34284 transitions. [2020-07-21 02:30:20,591 INFO L78 Accepts]: Start accepts. Automaton has 20133 states and 34284 transitions. Word has length 382 [2020-07-21 02:30:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:20,592 INFO L479 AbstractCegarLoop]: Abstraction has 20133 states and 34284 transitions. [2020-07-21 02:30:20,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20133 states and 34284 transitions. [2020-07-21 02:30:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-21 02:30:20,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:20,647 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] [2020-07-21 02:30:20,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:20,862 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash -486636909, now seen corresponding path program 1 times [2020-07-21 02:30:20,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:20,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18710767] [2020-07-21 02:30:20,863 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 [2020-07-21 02:30:21,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:21,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:30:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:21,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:21,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18710767] [2020-07-21 02:30:21,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:21,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:21,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110531987] [2020-07-21 02:30:21,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:21,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:21,457 INFO L87 Difference]: Start difference. First operand 20133 states and 34284 transitions. Second operand 3 states. [2020-07-21 02:30:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:22,233 INFO L93 Difference]: Finished difference Result 51645 states and 87920 transitions. [2020-07-21 02:30:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:22,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 402 [2020-07-21 02:30:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:22,337 INFO L225 Difference]: With dead ends: 51645 [2020-07-21 02:30:22,340 INFO L226 Difference]: Without dead ends: 35145 [2020-07-21 02:30:22,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35145 states. [2020-07-21 02:30:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35145 to 33605. [2020-07-21 02:30:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 02:30:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56972 transitions. [2020-07-21 02:30:23,513 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56972 transitions. Word has length 402 [2020-07-21 02:30:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:23,513 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56972 transitions. [2020-07-21 02:30:23,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56972 transitions. [2020-07-21 02:30:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 02:30:23,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:23,576 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] [2020-07-21 02:30:23,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:23,792 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 788712997, now seen corresponding path program 1 times [2020-07-21 02:30:23,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:23,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332531526] [2020-07-21 02:30:23,795 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 [2020-07-21 02:30:24,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:30:24,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:24,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:24,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332531526] [2020-07-21 02:30:24,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:24,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:24,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536233971] [2020-07-21 02:30:24,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:24,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:24,395 INFO L87 Difference]: Start difference. First operand 33605 states and 56972 transitions. Second operand 4 states. [2020-07-21 02:30:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:25,914 INFO L93 Difference]: Finished difference Result 66659 states and 112908 transitions. [2020-07-21 02:30:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:30:25,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-07-21 02:30:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:25,994 INFO L225 Difference]: With dead ends: 66659 [2020-07-21 02:30:25,994 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 02:30:26,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:30:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 02:30:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 02:30:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 02:30:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56907 transitions. [2020-07-21 02:30:26,770 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56907 transitions. Word has length 422 [2020-07-21 02:30:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:26,770 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56907 transitions. [2020-07-21 02:30:26,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56907 transitions. [2020-07-21 02:30:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:30:26,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:26,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:27,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:27,197 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1111374784, now seen corresponding path program 1 times [2020-07-21 02:30:27,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:27,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036310813] [2020-07-21 02:30:27,200 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 [2020-07-21 02:30:27,642 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:27,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:27,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:27,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036310813] [2020-07-21 02:30:27,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:27,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:27,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518625657] [2020-07-21 02:30:27,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:27,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:27,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:27,887 INFO L87 Difference]: Start difference. First operand 33605 states and 56907 transitions. Second operand 3 states. [2020-07-21 02:30:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:28,624 INFO L93 Difference]: Finished difference Result 63275 states and 107127 transitions. [2020-07-21 02:30:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:28,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:30:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:28,692 INFO L225 Difference]: With dead ends: 63275 [2020-07-21 02:30:28,692 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 02:30:28,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 02:30:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 02:30:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 02:30:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56905 transitions. [2020-07-21 02:30:29,677 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56905 transitions. Word has length 486 [2020-07-21 02:30:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:29,678 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56905 transitions. [2020-07-21 02:30:29,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56905 transitions. [2020-07-21 02:30:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:30:29,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:29,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:29,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:29,934 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1136399616, now seen corresponding path program 1 times [2020-07-21 02:30:29,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:29,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075485952] [2020-07-21 02:30:29,937 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 [2020-07-21 02:30:30,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:30,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:30,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075485952] [2020-07-21 02:30:30,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:30,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:30,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898103166] [2020-07-21 02:30:30,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:30,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:30,514 INFO L87 Difference]: Start difference. First operand 33605 states and 56905 transitions. Second operand 3 states. [2020-07-21 02:30:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:31,037 INFO L93 Difference]: Finished difference Result 62861 states and 106431 transitions. [2020-07-21 02:30:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:31,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:30:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:31,101 INFO L225 Difference]: With dead ends: 62861 [2020-07-21 02:30:31,102 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 02:30:31,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 02:30:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 02:30:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 02:30:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56901 transitions. [2020-07-21 02:30:31,752 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56901 transitions. Word has length 486 [2020-07-21 02:30:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:31,753 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56901 transitions. [2020-07-21 02:30:31,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56901 transitions. [2020-07-21 02:30:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:30:31,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:31,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:31,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:31,990 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:31,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:31,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1479898462, now seen corresponding path program 1 times [2020-07-21 02:30:31,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:31,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286582832] [2020-07-21 02:30:31,993 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 [2020-07-21 02:30:32,465 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:33,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:33,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286582832] [2020-07-21 02:30:33,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:33,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:33,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103266126] [2020-07-21 02:30:33,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:33,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:33,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:33,597 INFO L87 Difference]: Start difference. First operand 33605 states and 56901 transitions. Second operand 3 states. [2020-07-21 02:30:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:34,031 INFO L93 Difference]: Finished difference Result 61721 states and 104503 transitions. [2020-07-21 02:30:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:34,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:30:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:34,082 INFO L225 Difference]: With dead ends: 61721 [2020-07-21 02:30:34,082 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 02:30:34,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 02:30:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 02:30:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 02:30:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56885 transitions. [2020-07-21 02:30:34,649 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56885 transitions. Word has length 486 [2020-07-21 02:30:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:34,650 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56885 transitions. [2020-07-21 02:30:34,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56885 transitions. [2020-07-21 02:30:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:30:34,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:34,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:34,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:34,878 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1601272388, now seen corresponding path program 1 times [2020-07-21 02:30:34,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:34,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287768747] [2020-07-21 02:30:34,880 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 [2020-07-21 02:30:35,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2157 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:30:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:35,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:35,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287768747] [2020-07-21 02:30:35,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:35,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:30:35,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962958165] [2020-07-21 02:30:35,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:30:35,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:30:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:30:35,739 INFO L87 Difference]: Start difference. First operand 33605 states and 56885 transitions. Second operand 7 states. [2020-07-21 02:30:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:40,019 INFO L93 Difference]: Finished difference Result 221236 states and 374255 transitions. [2020-07-21 02:30:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:30:40,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2020-07-21 02:30:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:40,216 INFO L225 Difference]: With dead ends: 221236 [2020-07-21 02:30:40,216 INFO L226 Difference]: Without dead ends: 189776 [2020-07-21 02:30:40,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:30:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189776 states. [2020-07-21 02:30:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189776 to 66439. [2020-07-21 02:30:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66439 states. [2020-07-21 02:30:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66439 states to 66439 states and 111854 transitions. [2020-07-21 02:30:44,668 INFO L78 Accepts]: Start accepts. Automaton has 66439 states and 111854 transitions. Word has length 486 [2020-07-21 02:30:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:44,669 INFO L479 AbstractCegarLoop]: Abstraction has 66439 states and 111854 transitions. [2020-07-21 02:30:44,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:30:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66439 states and 111854 transitions. [2020-07-21 02:30:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:30:44,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:44,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:44,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:44,929 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash 434909845, now seen corresponding path program 1 times [2020-07-21 02:30:44,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:44,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457031700] [2020-07-21 02:30:44,931 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 [2020-07-21 02:30:45,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:30:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:45,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:45,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457031700] [2020-07-21 02:30:45,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:45,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:30:45,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198437820] [2020-07-21 02:30:45,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:30:45,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:30:45,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:30:45,600 INFO L87 Difference]: Start difference. First operand 66439 states and 111854 transitions. Second operand 7 states. [2020-07-21 02:30:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:53,037 INFO L93 Difference]: Finished difference Result 221044 states and 373359 transitions. [2020-07-21 02:30:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:30:53,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 02:30:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:53,247 INFO L225 Difference]: With dead ends: 221044 [2020-07-21 02:30:53,247 INFO L226 Difference]: Without dead ends: 189776 [2020-07-21 02:30:53,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:30:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189776 states. [2020-07-21 02:30:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189776 to 98326. [2020-07-21 02:30:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98326 states. [2020-07-21 02:30:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98326 states to 98326 states and 165519 transitions. [2020-07-21 02:30:56,541 INFO L78 Accepts]: Start accepts. Automaton has 98326 states and 165519 transitions. Word has length 487 [2020-07-21 02:30:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:56,541 INFO L479 AbstractCegarLoop]: Abstraction has 98326 states and 165519 transitions. [2020-07-21 02:30:56,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:30:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 98326 states and 165519 transitions. [2020-07-21 02:30:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:30:56,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:56,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:56,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:56,824 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1664588137, now seen corresponding path program 1 times [2020-07-21 02:30:56,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:56,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823333631] [2020-07-21 02:30:56,826 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 [2020-07-21 02:30:57,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:30:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:57,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:57,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823333631] [2020-07-21 02:30:57,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:57,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:30:57,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047412157] [2020-07-21 02:30:57,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:30:57,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:30:57,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:30:57,484 INFO L87 Difference]: Start difference. First operand 98326 states and 165519 transitions. Second operand 7 states. [2020-07-21 02:31:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:05,994 INFO L93 Difference]: Finished difference Result 251923 states and 425344 transitions. [2020-07-21 02:31:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:31:05,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 02:31:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:06,241 INFO L225 Difference]: With dead ends: 251923 [2020-07-21 02:31:06,242 INFO L226 Difference]: Without dead ends: 221663 [2020-07-21 02:31:06,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:31:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221663 states. [2020-07-21 02:31:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221663 to 129091. [2020-07-21 02:31:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129091 states. [2020-07-21 02:31:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129091 states to 129091 states and 217307 transitions. [2020-07-21 02:31:11,003 INFO L78 Accepts]: Start accepts. Automaton has 129091 states and 217307 transitions. Word has length 487 [2020-07-21 02:31:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:11,003 INFO L479 AbstractCegarLoop]: Abstraction has 129091 states and 217307 transitions. [2020-07-21 02:31:11,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:31:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 129091 states and 217307 transitions. [2020-07-21 02:31:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:31:11,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:11,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:11,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:11,333 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1064136043, now seen corresponding path program 1 times [2020-07-21 02:31:11,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:11,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503879344] [2020-07-21 02:31:11,335 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 [2020-07-21 02:31:11,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:31:11,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:11,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:31:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:11,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:11,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503879344] [2020-07-21 02:31:11,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:11,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:31:11,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145976262] [2020-07-21 02:31:11,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:31:11,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:31:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:31:11,989 INFO L87 Difference]: Start difference. First operand 129091 states and 217307 transitions. Second operand 7 states. [2020-07-21 02:31:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:22,924 INFO L93 Difference]: Finished difference Result 281095 states and 474470 transitions. [2020-07-21 02:31:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:31:22,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 02:31:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:23,184 INFO L225 Difference]: With dead ends: 281095 [2020-07-21 02:31:23,184 INFO L226 Difference]: Without dead ends: 251171 [2020-07-21 02:31:23,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:31:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251171 states. [2020-07-21 02:31:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251171 to 159247. [2020-07-21 02:31:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159247 states. [2020-07-21 02:31:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159247 states to 159247 states and 268073 transitions. [2020-07-21 02:31:29,935 INFO L78 Accepts]: Start accepts. Automaton has 159247 states and 268073 transitions. Word has length 487 [2020-07-21 02:31:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:29,935 INFO L479 AbstractCegarLoop]: Abstraction has 159247 states and 268073 transitions. [2020-07-21 02:31:29,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:31:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 159247 states and 268073 transitions. [2020-07-21 02:31:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:31:30,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:30,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:30,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:30,274 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2070221461, now seen corresponding path program 1 times [2020-07-21 02:31:30,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:30,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267758298] [2020-07-21 02:31:30,280 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 [2020-07-21 02:31:30,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:31:30,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:31:30,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:30,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:30,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267758298] [2020-07-21 02:31:30,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:30,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:31:30,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204645109] [2020-07-21 02:31:30,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:31:30,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:30,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:31:30,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:31:30,989 INFO L87 Difference]: Start difference. First operand 159247 states and 268073 transitions. Second operand 7 states. [2020-07-21 02:31:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:43,161 INFO L93 Difference]: Finished difference Result 312359 states and 527080 transitions. [2020-07-21 02:31:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:31:43,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 02:31:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:43,428 INFO L225 Difference]: With dead ends: 312359 [2020-07-21 02:31:43,429 INFO L226 Difference]: Without dead ends: 281763 [2020-07-21 02:31:43,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:31:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281763 states. [2020-07-21 02:31:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281763 to 190465. [2020-07-21 02:31:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190465 states. [2020-07-21 02:31:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190465 states to 190465 states and 320622 transitions. [2020-07-21 02:31:51,642 INFO L78 Accepts]: Start accepts. Automaton has 190465 states and 320622 transitions. Word has length 487 [2020-07-21 02:31:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:51,643 INFO L479 AbstractCegarLoop]: Abstraction has 190465 states and 320622 transitions. [2020-07-21 02:31:51,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:31:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 190465 states and 320622 transitions. [2020-07-21 02:31:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:31:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:51,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:51,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:51,999 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash 61917545, now seen corresponding path program 1 times [2020-07-21 02:31:52,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:52,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777471442] [2020-07-21 02:31:52,001 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 [2020-07-21 02:31:52,448 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:31:52,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:52,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:31:52,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:52,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:52,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777471442] [2020-07-21 02:31:52,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:52,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:31:52,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092643850] [2020-07-21 02:31:52,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:31:52,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:31:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:31:52,663 INFO L87 Difference]: Start difference. First operand 190465 states and 320622 transitions. Second operand 7 states. [2020-07-21 02:32:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:07,944 INFO L93 Difference]: Finished difference Result 344025 states and 580372 transitions. [2020-07-21 02:32:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:32:07,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 02:32:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:08,293 INFO L225 Difference]: With dead ends: 344025 [2020-07-21 02:32:08,293 INFO L226 Difference]: Without dead ends: 313093 [2020-07-21 02:32:08,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:32:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313093 states. [2020-07-21 02:32:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313093 to 222058. [2020-07-21 02:32:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222058 states. [2020-07-21 02:32:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222058 states to 222058 states and 373797 transitions. [2020-07-21 02:32:22,732 INFO L78 Accepts]: Start accepts. Automaton has 222058 states and 373797 transitions. Word has length 487 [2020-07-21 02:32:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:22,733 INFO L479 AbstractCegarLoop]: Abstraction has 222058 states and 373797 transitions. [2020-07-21 02:32:22,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:32:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 222058 states and 373797 transitions. [2020-07-21 02:32:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 02:32:22,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:22,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:32:23,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:23,144 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash 361727920, now seen corresponding path program 1 times [2020-07-21 02:32:23,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:23,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647823775] [2020-07-21 02:32:23,146 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 [2020-07-21 02:32:23,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:32:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:23,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:32:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:23,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:23,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647823775] [2020-07-21 02:32:23,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:23,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:32:23,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689772821] [2020-07-21 02:32:23,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:32:23,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:32:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:23,715 INFO L87 Difference]: Start difference. First operand 222058 states and 373797 transitions. Second operand 3 states. [2020-07-21 02:32:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:29,158 INFO L93 Difference]: Finished difference Result 342566 states and 576652 transitions. [2020-07-21 02:32:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:32:29,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 02:32:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:29,312 INFO L225 Difference]: With dead ends: 342566 [2020-07-21 02:32:29,312 INFO L226 Difference]: Without dead ends: 123711 [2020-07-21 02:32:29,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123711 states. [2020-07-21 02:32:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123711 to 123709. [2020-07-21 02:32:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123709 states. [2020-07-21 02:32:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123709 states to 123709 states and 207816 transitions. [2020-07-21 02:32:39,026 INFO L78 Accepts]: Start accepts. Automaton has 123709 states and 207816 transitions. Word has length 488 [2020-07-21 02:32:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:39,027 INFO L479 AbstractCegarLoop]: Abstraction has 123709 states and 207816 transitions. [2020-07-21 02:32:39,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:32:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 123709 states and 207816 transitions. [2020-07-21 02:32:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 02:32:39,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:39,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:32:39,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:39,319 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:39,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:39,319 INFO L82 PathProgramCache]: Analyzing trace with hash 248393120, now seen corresponding path program 1 times [2020-07-21 02:32:39,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:39,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191018857] [2020-07-21 02:32:39,320 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 [2020-07-21 02:32:39,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:32:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:32:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:40,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:40,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191018857] [2020-07-21 02:32:40,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:40,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:32:40,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937284115] [2020-07-21 02:32:40,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:32:40,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:32:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:40,130 INFO L87 Difference]: Start difference. First operand 123709 states and 207816 transitions. Second operand 3 states. [2020-07-21 02:32:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:44,510 INFO L93 Difference]: Finished difference Result 246720 states and 414395 transitions. [2020-07-21 02:32:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:32:44,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 02:32:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:45,150 INFO L225 Difference]: With dead ends: 246720 [2020-07-21 02:32:45,151 INFO L226 Difference]: Without dead ends: 123591 [2020-07-21 02:32:45,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123591 states. [2020-07-21 02:32:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123591 to 123591. [2020-07-21 02:32:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123591 states. [2020-07-21 02:32:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123591 states to 123591 states and 207359 transitions. [2020-07-21 02:32:50,979 INFO L78 Accepts]: Start accepts. Automaton has 123591 states and 207359 transitions. Word has length 488 [2020-07-21 02:32:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:50,980 INFO L479 AbstractCegarLoop]: Abstraction has 123591 states and 207359 transitions. [2020-07-21 02:32:50,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:32:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 123591 states and 207359 transitions. [2020-07-21 02:32:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 02:32:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:51,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:32:51,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:51,269 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1495583451, now seen corresponding path program 1 times [2020-07-21 02:32:51,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:51,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511758568] [2020-07-21 02:32:51,271 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 [2020-07-21 02:32:51,711 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:32:51,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:32:51,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:51,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:51,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511758568] [2020-07-21 02:32:51,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:51,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:32:51,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754941002] [2020-07-21 02:32:51,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:32:51,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:32:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:51,842 INFO L87 Difference]: Start difference. First operand 123591 states and 207359 transitions. Second operand 3 states. [2020-07-21 02:32:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:54,813 INFO L93 Difference]: Finished difference Result 182998 states and 307153 transitions. [2020-07-21 02:32:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:32:54,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 02:32:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:54,881 INFO L225 Difference]: With dead ends: 182998 [2020-07-21 02:32:54,881 INFO L226 Difference]: Without dead ends: 61323 [2020-07-21 02:32:54,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61323 states. [2020-07-21 02:33:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61323 to 61321. [2020-07-21 02:33:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61321 states. [2020-07-21 02:33:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61321 states to 61321 states and 102703 transitions. [2020-07-21 02:33:00,107 INFO L78 Accepts]: Start accepts. Automaton has 61321 states and 102703 transitions. Word has length 492 [2020-07-21 02:33:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:00,107 INFO L479 AbstractCegarLoop]: Abstraction has 61321 states and 102703 transitions. [2020-07-21 02:33:00,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 61321 states and 102703 transitions. [2020-07-21 02:33:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:33:00,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:00,150 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] [2020-07-21 02:33:00,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:00,351 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1667862974, now seen corresponding path program 1 times [2020-07-21 02:33:00,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:00,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741534091] [2020-07-21 02:33:00,353 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 [2020-07-21 02:33:01,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:01,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:33:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:01,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:01,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741534091] [2020-07-21 02:33:01,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:01,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:01,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999379408] [2020-07-21 02:33:01,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:01,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:01,151 INFO L87 Difference]: Start difference. First operand 61321 states and 102703 transitions. Second operand 3 states. [2020-07-21 02:33:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:02,251 INFO L93 Difference]: Finished difference Result 90557 states and 151708 transitions. [2020-07-21 02:33:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:33:02,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 02:33:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:02,286 INFO L225 Difference]: With dead ends: 90557 [2020-07-21 02:33:02,287 INFO L226 Difference]: Without dead ends: 30559 [2020-07-21 02:33:02,334 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 [2020-07-21 02:33:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30559 states. [2020-07-21 02:33:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30559 to 30557. [2020-07-21 02:33:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30557 states. [2020-07-21 02:33:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30557 states to 30557 states and 51096 transitions. [2020-07-21 02:33:03,755 INFO L78 Accepts]: Start accepts. Automaton has 30557 states and 51096 transitions. Word has length 496 [2020-07-21 02:33:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:03,755 INFO L479 AbstractCegarLoop]: Abstraction has 30557 states and 51096 transitions. [2020-07-21 02:33:03,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30557 states and 51096 transitions. [2020-07-21 02:33:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 02:33:03,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:03,778 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] [2020-07-21 02:33:03,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:03,986 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1349161951, now seen corresponding path program 1 times [2020-07-21 02:33:03,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:03,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583714517] [2020-07-21 02:33:03,988 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:04,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:33:04,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:04,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:04,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583714517] [2020-07-21 02:33:04,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:04,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:04,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370947456] [2020-07-21 02:33:04,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:04,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:04,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:04,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:04,626 INFO L87 Difference]: Start difference. First operand 30557 states and 51096 transitions. Second operand 3 states. [2020-07-21 02:33:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:05,256 INFO L93 Difference]: Finished difference Result 44919 states and 75113 transitions. [2020-07-21 02:33:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:33:05,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 02:33:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:05,274 INFO L225 Difference]: With dead ends: 44919 [2020-07-21 02:33:05,274 INFO L226 Difference]: Without dead ends: 15395 [2020-07-21 02:33:05,296 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 [2020-07-21 02:33:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15395 states. [2020-07-21 02:33:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15395 to 15393. [2020-07-21 02:33:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15393 states. [2020-07-21 02:33:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15393 states to 15393 states and 25706 transitions. [2020-07-21 02:33:05,989 INFO L78 Accepts]: Start accepts. Automaton has 15393 states and 25706 transitions. Word has length 500 [2020-07-21 02:33:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:05,989 INFO L479 AbstractCegarLoop]: Abstraction has 15393 states and 25706 transitions. [2020-07-21 02:33:05,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 15393 states and 25706 transitions. [2020-07-21 02:33:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:33:06,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:06,001 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] [2020-07-21 02:33:06,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:06,214 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1058528845, now seen corresponding path program 1 times [2020-07-21 02:33:06,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:06,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874525057] [2020-07-21 02:33:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:06,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:06,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:33:06,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:06,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:06,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874525057] [2020-07-21 02:33:06,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:06,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:06,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598222997] [2020-07-21 02:33:06,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:06,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:06,770 INFO L87 Difference]: Start difference. First operand 15393 states and 25706 transitions. Second operand 3 states. [2020-07-21 02:33:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:07,297 INFO L93 Difference]: Finished difference Result 30122 states and 50263 transitions. [2020-07-21 02:33:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:33:07,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 02:33:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:07,320 INFO L225 Difference]: With dead ends: 30122 [2020-07-21 02:33:07,320 INFO L226 Difference]: Without dead ends: 15393 [2020-07-21 02:33:07,337 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 [2020-07-21 02:33:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15393 states. [2020-07-21 02:33:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15393 to 15393. [2020-07-21 02:33:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15393 states. [2020-07-21 02:33:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15393 states to 15393 states and 25705 transitions. [2020-07-21 02:33:08,064 INFO L78 Accepts]: Start accepts. Automaton has 15393 states and 25705 transitions. Word has length 501 [2020-07-21 02:33:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:08,064 INFO L479 AbstractCegarLoop]: Abstraction has 15393 states and 25705 transitions. [2020-07-21 02:33:08,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15393 states and 25705 transitions. [2020-07-21 02:33:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 02:33:08,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:08,079 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] [2020-07-21 02:33:08,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:08,280 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:08,281 INFO L82 PathProgramCache]: Analyzing trace with hash 26522856, now seen corresponding path program 1 times [2020-07-21 02:33:08,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:08,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175130005] [2020-07-21 02:33:08,282 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:08,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:33:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:08,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:08,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175130005] [2020-07-21 02:33:08,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:08,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:08,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549304023] [2020-07-21 02:33:08,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:08,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:08,870 INFO L87 Difference]: Start difference. First operand 15393 states and 25705 transitions. Second operand 4 states. [2020-07-21 02:33:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:10,220 INFO L93 Difference]: Finished difference Result 44578 states and 74386 transitions. [2020-07-21 02:33:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:33:10,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 02:33:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:10,261 INFO L225 Difference]: With dead ends: 44578 [2020-07-21 02:33:10,261 INFO L226 Difference]: Without dead ends: 29930 [2020-07-21 02:33:10,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29930 states. [2020-07-21 02:33:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29930 to 27798. [2020-07-21 02:33:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27798 states. [2020-07-21 02:33:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27798 states to 27798 states and 46267 transitions. [2020-07-21 02:33:11,522 INFO L78 Accepts]: Start accepts. Automaton has 27798 states and 46267 transitions. Word has length 505 [2020-07-21 02:33:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:11,523 INFO L479 AbstractCegarLoop]: Abstraction has 27798 states and 46267 transitions. [2020-07-21 02:33:11,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:33:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27798 states and 46267 transitions. [2020-07-21 02:33:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 02:33:11,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:11,542 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] [2020-07-21 02:33:11,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:11,756 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash -920176291, now seen corresponding path program 1 times [2020-07-21 02:33:11,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:11,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530592540] [2020-07-21 02:33:11,757 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:12,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:12,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:33:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:12,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:12,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530592540] [2020-07-21 02:33:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:12,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:12,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689670012] [2020-07-21 02:33:12,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:12,340 INFO L87 Difference]: Start difference. First operand 27798 states and 46267 transitions. Second operand 4 states. [2020-07-21 02:33:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:14,686 INFO L93 Difference]: Finished difference Result 81639 states and 135832 transitions. [2020-07-21 02:33:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:33:14,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-21 02:33:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:14,750 INFO L225 Difference]: With dead ends: 81639 [2020-07-21 02:33:14,751 INFO L226 Difference]: Without dead ends: 54586 [2020-07-21 02:33:14,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54586 states. [2020-07-21 02:33:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54586 to 50374. [2020-07-21 02:33:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50374 states. [2020-07-21 02:33:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 83580 transitions. [2020-07-21 02:33:16,922 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 83580 transitions. Word has length 506 [2020-07-21 02:33:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:16,923 INFO L479 AbstractCegarLoop]: Abstraction has 50374 states and 83580 transitions. [2020-07-21 02:33:16,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:33:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 83580 transitions. [2020-07-21 02:33:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:33:16,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:16,960 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] [2020-07-21 02:33:17,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:17,161 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 304023201, now seen corresponding path program 1 times [2020-07-21 02:33:17,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:17,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013271698] [2020-07-21 02:33:17,163 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:17,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:17,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:33:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:17,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:17,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013271698] [2020-07-21 02:33:17,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:17,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:17,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743187012] [2020-07-21 02:33:17,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:17,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:17,771 INFO L87 Difference]: Start difference. First operand 50374 states and 83580 transitions. Second operand 4 states. [2020-07-21 02:33:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:22,002 INFO L93 Difference]: Finished difference Result 149025 states and 247231 transitions. [2020-07-21 02:33:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:33:22,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-21 02:33:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:22,125 INFO L225 Difference]: With dead ends: 149025 [2020-07-21 02:33:22,126 INFO L226 Difference]: Without dead ends: 99396 [2020-07-21 02:33:22,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99396 states. [2020-07-21 02:33:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99396 to 91071. [2020-07-21 02:33:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91071 states. [2020-07-21 02:33:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91071 states to 91071 states and 150646 transitions. [2020-07-21 02:33:26,676 INFO L78 Accepts]: Start accepts. Automaton has 91071 states and 150646 transitions. Word has length 507 [2020-07-21 02:33:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:26,676 INFO L479 AbstractCegarLoop]: Abstraction has 91071 states and 150646 transitions. [2020-07-21 02:33:26,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:33:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 91071 states and 150646 transitions. [2020-07-21 02:33:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 02:33:26,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:26,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:33:26,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:26,947 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash 106603766, now seen corresponding path program 1 times [2020-07-21 02:33:26,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:26,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749089237] [2020-07-21 02:33:26,949 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:27,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:27,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:33:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:27,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:27,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749089237] [2020-07-21 02:33:27,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:27,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:27,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081506473] [2020-07-21 02:33:27,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:27,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:27,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:27,560 INFO L87 Difference]: Start difference. First operand 91071 states and 150646 transitions. Second operand 4 states. [2020-07-21 02:33:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:36,885 INFO L93 Difference]: Finished difference Result 266359 states and 440638 transitions. [2020-07-21 02:33:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:33:36,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-07-21 02:33:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:37,071 INFO L225 Difference]: With dead ends: 266359 [2020-07-21 02:33:37,072 INFO L226 Difference]: Without dead ends: 176033 [2020-07-21 02:33:37,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176033 states. [2020-07-21 02:33:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176033 to 161588. [2020-07-21 02:33:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161588 states. [2020-07-21 02:33:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161588 states to 161588 states and 266522 transitions. [2020-07-21 02:33:47,703 INFO L78 Accepts]: Start accepts. Automaton has 161588 states and 266522 transitions. Word has length 508 [2020-07-21 02:33:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:47,704 INFO L479 AbstractCegarLoop]: Abstraction has 161588 states and 266522 transitions. [2020-07-21 02:33:47,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:33:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 161588 states and 266522 transitions. [2020-07-21 02:33:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 02:33:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:47,826 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, 1, 1] [2020-07-21 02:33:48,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:48,027 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:48,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1211329446, now seen corresponding path program 1 times [2020-07-21 02:33:48,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:48,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142044208] [2020-07-21 02:33:48,029 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:48,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:48,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:33:48,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:48,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:48,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142044208] [2020-07-21 02:33:48,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:48,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:48,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12647670] [2020-07-21 02:33:48,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:48,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:48,638 INFO L87 Difference]: Start difference. First operand 161588 states and 266522 transitions. Second operand 4 states. [2020-07-21 02:34:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:34:00,798 INFO L93 Difference]: Finished difference Result 460601 states and 760134 transitions. [2020-07-21 02:34:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:34:00,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-21 02:34:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:34:01,111 INFO L225 Difference]: With dead ends: 460601 [2020-07-21 02:34:01,112 INFO L226 Difference]: Without dead ends: 303473 [2020-07-21 02:34:01,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:34:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303473 states. [2020-07-21 02:34:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303473 to 280651. [2020-07-21 02:34:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280651 states. [2020-07-21 02:34:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280651 states to 280651 states and 461781 transitions. [2020-07-21 02:34:19,905 INFO L78 Accepts]: Start accepts. Automaton has 280651 states and 461781 transitions. Word has length 509 [2020-07-21 02:34:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:34:19,905 INFO L479 AbstractCegarLoop]: Abstraction has 280651 states and 461781 transitions. [2020-07-21 02:34:19,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:34:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 280651 states and 461781 transitions. [2020-07-21 02:34:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 02:34:20,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:34:20,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:34:20,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:34:20,350 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:34:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:34:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1884302537, now seen corresponding path program 1 times [2020-07-21 02:34:20,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:34:20,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896351661] [2020-07-21 02:34:20,352 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:34:20,789 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:34:20,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:34:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2176 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:34:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:34:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:34:21,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:34:21,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896351661] [2020-07-21 02:34:21,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:34:21,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:34:21,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769121855] [2020-07-21 02:34:21,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:34:21,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:34:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:34:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:34:21,041 INFO L87 Difference]: Start difference. First operand 280651 states and 461781 transitions. Second operand 4 states. [2020-07-21 02:34:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:34:40,412 INFO L93 Difference]: Finished difference Result 403171 states and 664488 transitions. [2020-07-21 02:34:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:34:40,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-21 02:34:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:34:40,784 INFO L225 Difference]: With dead ends: 403171 [2020-07-21 02:34:40,785 INFO L226 Difference]: Without dead ends: 340321 [2020-07-21 02:34:40,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:34:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340321 states. [2020-07-21 02:34:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340321 to 318030. [2020-07-21 02:34:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318030 states. [2020-07-21 02:34:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318030 states to 318030 states and 523238 transitions. [2020-07-21 02:34:57,097 INFO L78 Accepts]: Start accepts. Automaton has 318030 states and 523238 transitions. Word has length 509 [2020-07-21 02:34:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:34:57,097 INFO L479 AbstractCegarLoop]: Abstraction has 318030 states and 523238 transitions. [2020-07-21 02:34:57,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:34:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 318030 states and 523238 transitions. [2020-07-21 02:34:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 02:34:57,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:34:57,359 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, 1, 1, 1] [2020-07-21 02:34:57,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:34:57,560 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:34:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:34:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1849533820, now seen corresponding path program 1 times [2020-07-21 02:34:57,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:34:57,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914890921] [2020-07-21 02:34:57,562 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:34:58,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:34:58,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:34:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2175 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:34:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:35:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:35:02,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:35:02,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914890921] [2020-07-21 02:35:02,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:35:02,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:35:02,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150462243] [2020-07-21 02:35:02,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:35:02,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:35:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:35:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:35:02,948 INFO L87 Difference]: Start difference. First operand 318030 states and 523238 transitions. Second operand 3 states. [2020-07-21 02:35:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:35:25,969 INFO L93 Difference]: Finished difference Result 688291 states and 1133070 transitions. [2020-07-21 02:35:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:35:25,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-07-21 02:35:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:35:26,692 INFO L225 Difference]: With dead ends: 688291 [2020-07-21 02:35:26,693 INFO L226 Difference]: Without dead ends: 531845 [2020-07-21 02:35:26,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:35:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531845 states. [2020-07-21 02:35:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531845 to 531409. [2020-07-21 02:35:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531409 states. [2020-07-21 02:36:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531409 states to 531409 states and 873533 transitions. [2020-07-21 02:36:01,112 INFO L78 Accepts]: Start accepts. Automaton has 531409 states and 873533 transitions. Word has length 510 [2020-07-21 02:36:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:36:01,112 INFO L479 AbstractCegarLoop]: Abstraction has 531409 states and 873533 transitions. [2020-07-21 02:36:01,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:36:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 531409 states and 873533 transitions. [2020-07-21 02:36:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 02:36:01,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:36:01,550 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, 1, 1, 1, 1] [2020-07-21 02:36:01,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:36:01,751 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:36:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:36:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -728229181, now seen corresponding path program 1 times [2020-07-21 02:36:01,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:36:01,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666329623] [2020-07-21 02:36:01,752 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:36:02,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:36:02,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:36:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:36:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:36:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:36:02,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:36:02,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666329623] [2020-07-21 02:36:02,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:36:02,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:36:02,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536964240] [2020-07-21 02:36:02,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:36:02,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:36:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:36:02,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:36:02,606 INFO L87 Difference]: Start difference. First operand 531409 states and 873533 transitions. Second operand 7 states. [2020-07-21 02:37:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:37:04,875 INFO L93 Difference]: Finished difference Result 1530242 states and 2512108 transitions. [2020-07-21 02:37:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 02:37:04,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-21 02:37:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:37:06,320 INFO L225 Difference]: With dead ends: 1530242 [2020-07-21 02:37:06,320 INFO L226 Difference]: Without dead ends: 1000365 [2020-07-21 02:37:06,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-21 02:37:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000365 states. [2020-07-21 02:38:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000365 to 531409. [2020-07-21 02:38:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531409 states. [2020-07-21 02:38:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531409 states to 531409 states and 864163 transitions. [2020-07-21 02:38:05,225 INFO L78 Accepts]: Start accepts. Automaton has 531409 states and 864163 transitions. Word has length 511 [2020-07-21 02:38:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:38:05,225 INFO L479 AbstractCegarLoop]: Abstraction has 531409 states and 864163 transitions. [2020-07-21 02:38:05,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:38:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 531409 states and 864163 transitions. [2020-07-21 02:38:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 02:38:05,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:38:05,690 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, 1, 1, 1, 1] [2020-07-21 02:38:05,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:38:05,891 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:38:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:38:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2103082301, now seen corresponding path program 1 times [2020-07-21 02:38:05,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:38:05,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670432749] [2020-07-21 02:38:05,893 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:38:08,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:38:08,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:38:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:38:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:38:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:38:08,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:38:08,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670432749] [2020-07-21 02:38:08,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:38:08,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:38:08,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882930267] [2020-07-21 02:38:08,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:38:08,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:38:08,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:38:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:38:08,321 INFO L87 Difference]: Start difference. First operand 531409 states and 864163 transitions. Second operand 7 states. [2020-07-21 02:39:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:39:19,454 INFO L93 Difference]: Finished difference Result 1424028 states and 2309832 transitions. [2020-07-21 02:39:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 02:39:19,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-21 02:39:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:39:20,780 INFO L225 Difference]: With dead ends: 1424028 [2020-07-21 02:39:20,780 INFO L226 Difference]: Without dead ends: 990917 [2020-07-21 02:39:21,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-21 02:39:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990917 states. [2020-07-21 02:40:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990917 to 531409. [2020-07-21 02:40:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531409 states. [2020-07-21 02:40:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531409 states to 531409 states and 864161 transitions. [2020-07-21 02:40:13,602 INFO L78 Accepts]: Start accepts. Automaton has 531409 states and 864161 transitions. Word has length 511 [2020-07-21 02:40:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:40:13,602 INFO L479 AbstractCegarLoop]: Abstraction has 531409 states and 864161 transitions. [2020-07-21 02:40:13,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:40:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 531409 states and 864161 transitions. [2020-07-21 02:40:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 02:40:14,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:40:14,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:40:14,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:40:14,233 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:40:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:40:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1228696802, now seen corresponding path program 1 times [2020-07-21 02:40:14,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:40:14,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401783335] [2020-07-21 02:40:14,235 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:40:14,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:40:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:40:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:40:14,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:40:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:40:16,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:40:16,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401783335] [2020-07-21 02:40:16,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:40:16,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:40:16,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563881136] [2020-07-21 02:40:16,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:40:16,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:40:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:40:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:40:16,525 INFO L87 Difference]: Start difference. First operand 531409 states and 864161 transitions. Second operand 3 states. [2020-07-21 02:40:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:40:35,184 INFO L93 Difference]: Finished difference Result 780387 states and 1269220 transitions. [2020-07-21 02:40:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:40:35,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 511 [2020-07-21 02:40:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:40:35,497 INFO L225 Difference]: With dead ends: 780387 [2020-07-21 02:40:35,497 INFO L226 Difference]: Without dead ends: 250380 [2020-07-21 02:40:35,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:40:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250380 states. [2020-07-21 02:41:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250380 to 250378. [2020-07-21 02:41:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250378 states. [2020-07-21 02:41:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250378 states to 250378 states and 406327 transitions. [2020-07-21 02:41:01,373 INFO L78 Accepts]: Start accepts. Automaton has 250378 states and 406327 transitions. Word has length 511 [2020-07-21 02:41:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:41:01,374 INFO L479 AbstractCegarLoop]: Abstraction has 250378 states and 406327 transitions. [2020-07-21 02:41:01,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:41:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 250378 states and 406327 transitions. [2020-07-21 02:41:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-21 02:41:01,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:41:01,556 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:41:01,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:41:01,763 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:41:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:41:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash 130218293, now seen corresponding path program 1 times [2020-07-21 02:41:01,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:41:01,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295927631] [2020-07-21 02:41:01,765 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:41:02,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:41:02,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:41:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2174 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 02:41:02,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:41:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:41:02,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:41:02,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295927631] [2020-07-21 02:41:02,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:41:02,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:41:02,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222062958] [2020-07-21 02:41:02,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:41:02,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:41:02,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:41:02,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:41:02,418 INFO L87 Difference]: Start difference. First operand 250378 states and 406327 transitions. Second operand 7 states.