/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 23:59:26,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:59:26,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:59:26,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:59:26,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:59:26,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:59:26,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:59:26,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:59:26,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:59:26,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:59:26,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:59:26,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:59:26,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:59:26,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:59:26,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:59:26,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:59:26,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:59:26,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:59:26,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:59:26,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:59:26,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:59:26,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:59:26,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:59:26,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:59:26,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:59:26,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:59:26,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:59:26,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:59:26,154 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 23:59:26,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:59:26,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:59:26,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:59:26,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:59:26,192 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:59:26,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:59:26,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:59:26,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:59:26,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:59:26,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:59:26,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:59:26,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:59:26,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:59:26,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:59:26,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:59:26,196 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:59:26,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:59:26,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:59:26,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:59:26,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:59:26,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:59:26,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:59:26,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:59:26,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:59:26,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:59:26,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:59:26,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:26,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:59:26,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:59:26,201 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 23:59:26,553 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:59:26,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:59:26,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:59:26,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:59:26,580 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:59:26,580 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 23:59:26,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc9833fa/4c261afcddb3424f9eaf5435bcc0823e/FLAGe92cb5aca [2020-07-21 23:59:27,325 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:59:27,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 23:59:27,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc9833fa/4c261afcddb3424f9eaf5435bcc0823e/FLAGe92cb5aca [2020-07-21 23:59:27,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc9833fa/4c261afcddb3424f9eaf5435bcc0823e [2020-07-21 23:59:27,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:59:27,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:59:27,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:59:27,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:59:27,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:59:27,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:59:27" (1/1) ... [2020-07-21 23:59:27,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af4f510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:27, skipping insertion in model container [2020-07-21 23:59:27,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:59:27" (1/1) ... [2020-07-21 23:59:27,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:59:27,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:59:30,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:59:30,348 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:59:32,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:59:32,169 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:59:32,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32 WrapperNode [2020-07-21 23:59:32,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:59:32,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:59:32,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:59:32,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:59:32,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (1/1) ... [2020-07-21 23:59:32,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:59:32,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:59:32,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:59:32,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:59:32,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (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 23:59:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:59:32,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:59:32,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:59:32,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:59:32,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:59:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:59:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:59:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:59:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:59:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:59:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:59:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:59:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:59:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:59:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:59:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:59:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 23:59:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:59:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:59:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:59:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:59:32,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:59:38,916 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:59:38,916 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:59:38,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:59:38 BoogieIcfgContainer [2020-07-21 23:59:38,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:59:38,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:59:38,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:59:38,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:59:38,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:59:27" (1/3) ... [2020-07-21 23:59:38,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676dbdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:59:38, skipping insertion in model container [2020-07-21 23:59:38,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:59:32" (2/3) ... [2020-07-21 23:59:38,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676dbdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:59:38, skipping insertion in model container [2020-07-21 23:59:38,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:59:38" (3/3) ... [2020-07-21 23:59:38,983 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 23:59:38,994 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:59:39,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 23:59:39,021 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 23:59:39,054 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:59:39,054 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:59:39,054 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:59:39,054 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:59:39,055 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:59:39,055 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:59:39,055 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:59:39,055 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:59:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-21 23:59:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 23:59:39,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:39,156 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 23:59:39,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-21 23:59:39,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:39,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9072379] [2020-07-21 23:59:39,173 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 23:59:39,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:59:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:40,002 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 23:59:40,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:40,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9072379] [2020-07-21 23:59:40,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:40,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:40,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644998006] [2020-07-21 23:59:40,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:40,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:40,031 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 3 states. [2020-07-21 23:59:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:40,475 INFO L93 Difference]: Finished difference Result 5960 states and 10322 transitions. [2020-07-21 23:59:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:40,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 23:59:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:40,537 INFO L225 Difference]: With dead ends: 5960 [2020-07-21 23:59:40,537 INFO L226 Difference]: Without dead ends: 4221 [2020-07-21 23:59:40,554 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 23:59:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2020-07-21 23:59:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4121. [2020-07-21 23:59:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-07-21 23:59:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 7128 transitions. [2020-07-21 23:59:40,821 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 7128 transitions. Word has length 322 [2020-07-21 23:59:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:40,824 INFO L479 AbstractCegarLoop]: Abstraction has 4121 states and 7128 transitions. [2020-07-21 23:59:40,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 7128 transitions. [2020-07-21 23:59:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:59:40,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:40,846 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 23:59:41,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:41,062 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:41,063 INFO L82 PathProgramCache]: Analyzing trace with hash -24233743, now seen corresponding path program 1 times [2020-07-21 23:59:41,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:41,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169559861] [2020-07-21 23:59:41,064 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 23:59:41,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:59:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:41,720 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 23:59:41,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:41,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169559861] [2020-07-21 23:59:41,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:41,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:41,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313149656] [2020-07-21 23:59:41,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:41,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:41,726 INFO L87 Difference]: Start difference. First operand 4121 states and 7128 transitions. Second operand 3 states. [2020-07-21 23:59:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:42,062 INFO L93 Difference]: Finished difference Result 10257 states and 17622 transitions. [2020-07-21 23:59:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:42,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 23:59:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:42,104 INFO L225 Difference]: With dead ends: 10257 [2020-07-21 23:59:42,105 INFO L226 Difference]: Without dead ends: 7153 [2020-07-21 23:59:42,116 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 23:59:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2020-07-21 23:59:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 6957. [2020-07-21 23:59:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6957 states. [2020-07-21 23:59:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 11956 transitions. [2020-07-21 23:59:42,427 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 11956 transitions. Word has length 342 [2020-07-21 23:59:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:42,428 INFO L479 AbstractCegarLoop]: Abstraction has 6957 states and 11956 transitions. [2020-07-21 23:59:42,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 11956 transitions. [2020-07-21 23:59:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-07-21 23:59:42,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:42,451 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 23:59:42,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:42,666 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash 828287305, now seen corresponding path program 1 times [2020-07-21 23:59:42,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:42,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770120463] [2020-07-21 23:59:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:43,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:59:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:43,181 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 23:59:43,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:43,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770120463] [2020-07-21 23:59:43,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:43,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:43,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133427538] [2020-07-21 23:59:43,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:43,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:43,184 INFO L87 Difference]: Start difference. First operand 6957 states and 11956 transitions. Second operand 3 states. [2020-07-21 23:59:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:43,611 INFO L93 Difference]: Finished difference Result 17761 states and 30416 transitions. [2020-07-21 23:59:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:43,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-07-21 23:59:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:43,671 INFO L225 Difference]: With dead ends: 17761 [2020-07-21 23:59:43,672 INFO L226 Difference]: Without dead ends: 12249 [2020-07-21 23:59:43,686 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 23:59:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12249 states. [2020-07-21 23:59:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12249 to 11861. [2020-07-21 23:59:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11861 states. [2020-07-21 23:59:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 20284 transitions. [2020-07-21 23:59:44,077 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 20284 transitions. Word has length 362 [2020-07-21 23:59:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:44,078 INFO L479 AbstractCegarLoop]: Abstraction has 11861 states and 20284 transitions. [2020-07-21 23:59:44,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 20284 transitions. [2020-07-21 23:59:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 23:59:44,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:44,122 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 23:59:44,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:44,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:44,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1599264653, now seen corresponding path program 1 times [2020-07-21 23:59:44,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:44,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139950276] [2020-07-21 23:59:44,339 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 23:59:44,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:44,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:44,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 2174 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:59:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:44,962 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 23:59:44,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:44,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139950276] [2020-07-21 23:59:44,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:44,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:44,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602758868] [2020-07-21 23:59:44,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:44,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:44,966 INFO L87 Difference]: Start difference. First operand 11861 states and 20284 transitions. Second operand 3 states. [2020-07-21 23:59:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:45,583 INFO L93 Difference]: Finished difference Result 30541 states and 52152 transitions. [2020-07-21 23:59:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:45,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-21 23:59:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:45,664 INFO L225 Difference]: With dead ends: 30541 [2020-07-21 23:59:45,664 INFO L226 Difference]: Without dead ends: 20905 [2020-07-21 23:59:45,693 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 23:59:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2020-07-21 23:59:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 20133. [2020-07-21 23:59:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20133 states. [2020-07-21 23:59:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20133 states to 20133 states and 34284 transitions. [2020-07-21 23:59:46,229 INFO L78 Accepts]: Start accepts. Automaton has 20133 states and 34284 transitions. Word has length 382 [2020-07-21 23:59:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:46,230 INFO L479 AbstractCegarLoop]: Abstraction has 20133 states and 34284 transitions. [2020-07-21 23:59:46,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20133 states and 34284 transitions. [2020-07-21 23:59:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-21 23:59:46,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:46,295 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 23:59:46,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:46,510 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash -486636909, now seen corresponding path program 1 times [2020-07-21 23:59:46,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:46,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449989902] [2020-07-21 23:59:46,511 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 23:59:47,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:47,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:59:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:47,926 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 23:59:47,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:47,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449989902] [2020-07-21 23:59:47,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:47,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:47,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756553842] [2020-07-21 23:59:47,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:47,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:47,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:47,933 INFO L87 Difference]: Start difference. First operand 20133 states and 34284 transitions. Second operand 3 states. [2020-07-21 23:59:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:48,589 INFO L93 Difference]: Finished difference Result 51645 states and 87920 transitions. [2020-07-21 23:59:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:48,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 402 [2020-07-21 23:59:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:48,681 INFO L225 Difference]: With dead ends: 51645 [2020-07-21 23:59:48,681 INFO L226 Difference]: Without dead ends: 35145 [2020-07-21 23:59:48,731 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 23:59:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35145 states. [2020-07-21 23:59:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35145 to 33605. [2020-07-21 23:59:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 23:59:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56972 transitions. [2020-07-21 23:59:49,873 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56972 transitions. Word has length 402 [2020-07-21 23:59:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:49,873 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56972 transitions. [2020-07-21 23:59:49,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56972 transitions. [2020-07-21 23:59:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 23:59:49,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:49,954 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 23:59:50,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:50,169 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash 788712997, now seen corresponding path program 1 times [2020-07-21 23:59:50,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:50,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146375962] [2020-07-21 23:59:50,171 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 23:59:50,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:50,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:59:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:50,946 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 23:59:50,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:50,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146375962] [2020-07-21 23:59:50,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:50,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:59:50,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120970695] [2020-07-21 23:59:50,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:59:50,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:59:50,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:59:50,953 INFO L87 Difference]: Start difference. First operand 33605 states and 56972 transitions. Second operand 4 states. [2020-07-21 23:59:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:51,723 INFO L93 Difference]: Finished difference Result 66659 states and 112908 transitions. [2020-07-21 23:59:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:59:51,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-07-21 23:59:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:51,814 INFO L225 Difference]: With dead ends: 66659 [2020-07-21 23:59:51,815 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 23:59:51,884 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 23:59:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 23:59:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 23:59:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 23:59:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56907 transitions. [2020-07-21 23:59:53,943 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56907 transitions. Word has length 422 [2020-07-21 23:59:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:53,944 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56907 transitions. [2020-07-21 23:59:53,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:59:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56907 transitions. [2020-07-21 23:59:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:59:53,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:53,991 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 23:59:54,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:54,204 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1111374784, now seen corresponding path program 1 times [2020-07-21 23:59:54,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:54,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401118650] [2020-07-21 23:59:54,207 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 23:59:54,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:59:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:54,832 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 23:59:54,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:54,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401118650] [2020-07-21 23:59:54,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:54,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:54,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24865731] [2020-07-21 23:59:54,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:54,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:54,835 INFO L87 Difference]: Start difference. First operand 33605 states and 56907 transitions. Second operand 3 states. [2020-07-21 23:59:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:55,489 INFO L93 Difference]: Finished difference Result 63275 states and 107127 transitions. [2020-07-21 23:59:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:55,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 23:59:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:55,545 INFO L225 Difference]: With dead ends: 63275 [2020-07-21 23:59:55,546 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 23:59:55,583 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 23:59:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 23:59:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 23:59:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 23:59:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56905 transitions. [2020-07-21 23:59:56,256 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56905 transitions. Word has length 486 [2020-07-21 23:59:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:56,257 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56905 transitions. [2020-07-21 23:59:56,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56905 transitions. [2020-07-21 23:59:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:59:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:56,304 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 23:59:56,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:56,519 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1136399616, now seen corresponding path program 1 times [2020-07-21 23:59:56,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:56,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222046079] [2020-07-21 23:59:56,522 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 23:59:56,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:56,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:56,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:59:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:57,308 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 23:59:57,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:57,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222046079] [2020-07-21 23:59:57,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:57,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:57,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878632528] [2020-07-21 23:59:57,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:57,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:57,311 INFO L87 Difference]: Start difference. First operand 33605 states and 56905 transitions. Second operand 3 states. [2020-07-21 23:59:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:57,730 INFO L93 Difference]: Finished difference Result 62861 states and 106431 transitions. [2020-07-21 23:59:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:57,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 23:59:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:57,776 INFO L225 Difference]: With dead ends: 62861 [2020-07-21 23:59:57,776 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 23:59:57,822 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 23:59:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 23:59:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 23:59:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 23:59:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56901 transitions. [2020-07-21 23:59:58,417 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56901 transitions. Word has length 486 [2020-07-21 23:59:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:58,417 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56901 transitions. [2020-07-21 23:59:58,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56901 transitions. [2020-07-21 23:59:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:59:58,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:58,448 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 23:59:58,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:58,657 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:58,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1479898462, now seen corresponding path program 1 times [2020-07-21 23:59:58,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:58,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754136638] [2020-07-21 23:59:58,661 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 23:59:59,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:59:59,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:59,502 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 23:59:59,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:59,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754136638] [2020-07-21 23:59:59,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:59,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:59,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166162720] [2020-07-21 23:59:59,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:59,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:59,506 INFO L87 Difference]: Start difference. First operand 33605 states and 56901 transitions. Second operand 3 states. [2020-07-22 00:00:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:00,014 INFO L93 Difference]: Finished difference Result 61721 states and 104503 transitions. [2020-07-22 00:00:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:00:00,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-22 00:00:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:00,063 INFO L225 Difference]: With dead ends: 61721 [2020-07-22 00:00:00,064 INFO L226 Difference]: Without dead ends: 33605 [2020-07-22 00:00:00,097 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 [2020-07-22 00:00:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-22 00:00:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-22 00:00:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-22 00:00:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56885 transitions. [2020-07-22 00:00:02,084 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56885 transitions. Word has length 486 [2020-07-22 00:00:02,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:00:02,085 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56885 transitions. [2020-07-22 00:00:02,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:00:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56885 transitions. [2020-07-22 00:00:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-22 00:00:02,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:00:02,113 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] [2020-07-22 00:00:02,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:02,314 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:00:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:00:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1601272388, now seen corresponding path program 1 times [2020-07-22 00:00:02,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:00:02,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157886933] [2020-07-22 00:00:02,319 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 [2020-07-22 00:00:02,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:00:02,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:00:02,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2157 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:00:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:00:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:00:03,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:00:03,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157886933] [2020-07-22 00:00:03,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:00:03,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:00:03,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772837132] [2020-07-22 00:00:03,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:00:03,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:00:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:00:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:00:03,039 INFO L87 Difference]: Start difference. First operand 33605 states and 56885 transitions. Second operand 7 states. [2020-07-22 00:00:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:07,307 INFO L93 Difference]: Finished difference Result 221236 states and 374255 transitions. [2020-07-22 00:00:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-22 00:00:07,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2020-07-22 00:00:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:07,536 INFO L225 Difference]: With dead ends: 221236 [2020-07-22 00:00:07,537 INFO L226 Difference]: Without dead ends: 189776 [2020-07-22 00:00:07,601 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 [2020-07-22 00:00:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189776 states. [2020-07-22 00:00:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189776 to 66439. [2020-07-22 00:00:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66439 states. [2020-07-22 00:00:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66439 states to 66439 states and 111854 transitions. [2020-07-22 00:00:11,962 INFO L78 Accepts]: Start accepts. Automaton has 66439 states and 111854 transitions. Word has length 486 [2020-07-22 00:00:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:00:11,962 INFO L479 AbstractCegarLoop]: Abstraction has 66439 states and 111854 transitions. [2020-07-22 00:00:11,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:00:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 66439 states and 111854 transitions. [2020-07-22 00:00:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-22 00:00:12,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:00:12,033 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] [2020-07-22 00:00:12,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:12,239 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:00:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:00:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 434909845, now seen corresponding path program 1 times [2020-07-22 00:00:12,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:00:12,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49091201] [2020-07-22 00:00:12,241 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 [2020-07-22 00:00:12,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:00:12,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:00:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:00:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:00:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:00:12,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:00:12,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49091201] [2020-07-22 00:00:12,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:00:12,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:00:12,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324650178] [2020-07-22 00:00:12,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:00:12,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:00:12,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:00:12,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:00:12,980 INFO L87 Difference]: Start difference. First operand 66439 states and 111854 transitions. Second operand 7 states. [2020-07-22 00:00:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:18,558 INFO L93 Difference]: Finished difference Result 221044 states and 373359 transitions. [2020-07-22 00:00:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-22 00:00:18,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-22 00:00:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:18,858 INFO L225 Difference]: With dead ends: 221044 [2020-07-22 00:00:18,859 INFO L226 Difference]: Without dead ends: 189776 [2020-07-22 00:00:18,937 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 [2020-07-22 00:00:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189776 states. [2020-07-22 00:00:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189776 to 98326. [2020-07-22 00:00:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98326 states. [2020-07-22 00:00:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98326 states to 98326 states and 165519 transitions. [2020-07-22 00:00:24,944 INFO L78 Accepts]: Start accepts. Automaton has 98326 states and 165519 transitions. Word has length 487 [2020-07-22 00:00:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:00:24,945 INFO L479 AbstractCegarLoop]: Abstraction has 98326 states and 165519 transitions. [2020-07-22 00:00:24,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:00:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 98326 states and 165519 transitions. [2020-07-22 00:00:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-22 00:00:25,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:00:25,037 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] [2020-07-22 00:00:25,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:25,238 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:00:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:00:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1664588137, now seen corresponding path program 1 times [2020-07-22 00:00:25,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:00:25,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745272972] [2020-07-22 00:00:25,240 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 [2020-07-22 00:00:25,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:00:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:00:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:00:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:00:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:00:25,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:00:25,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745272972] [2020-07-22 00:00:25,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:00:25,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:00:25,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202231974] [2020-07-22 00:00:25,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:00:25,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:00:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:00:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:00:25,924 INFO L87 Difference]: Start difference. First operand 98326 states and 165519 transitions. Second operand 7 states. [2020-07-22 00:00:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:34,863 INFO L93 Difference]: Finished difference Result 251923 states and 425344 transitions. [2020-07-22 00:00:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-22 00:00:34,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-22 00:00:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:35,238 INFO L225 Difference]: With dead ends: 251923 [2020-07-22 00:00:35,238 INFO L226 Difference]: Without dead ends: 221663 [2020-07-22 00:00:35,356 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 [2020-07-22 00:00:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221663 states. [2020-07-22 00:00:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221663 to 129091. [2020-07-22 00:00:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129091 states. [2020-07-22 00:00:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129091 states to 129091 states and 217307 transitions. [2020-07-22 00:00:40,413 INFO L78 Accepts]: Start accepts. Automaton has 129091 states and 217307 transitions. Word has length 487 [2020-07-22 00:00:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:00:40,414 INFO L479 AbstractCegarLoop]: Abstraction has 129091 states and 217307 transitions. [2020-07-22 00:00:40,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:00:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 129091 states and 217307 transitions. [2020-07-22 00:00:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-22 00:00:40,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:00:40,548 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] [2020-07-22 00:00:40,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:40,755 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:00:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:00:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1064136043, now seen corresponding path program 1 times [2020-07-22 00:00:40,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:00:40,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437768201] [2020-07-22 00:00:40,757 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 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 [2020-07-22 00:00:41,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:00:41,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:00:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:00:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:00:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:00:41,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:00:41,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437768201] [2020-07-22 00:00:41,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:00:41,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:00:41,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636402490] [2020-07-22 00:00:41,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:00:41,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:00:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:00:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:00:41,457 INFO L87 Difference]: Start difference. First operand 129091 states and 217307 transitions. Second operand 7 states. [2020-07-22 00:00:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:54,111 INFO L93 Difference]: Finished difference Result 281095 states and 474470 transitions. [2020-07-22 00:00:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-22 00:00:54,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-22 00:00:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:54,420 INFO L225 Difference]: With dead ends: 281095 [2020-07-22 00:00:54,421 INFO L226 Difference]: Without dead ends: 251171 [2020-07-22 00:00:54,503 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 [2020-07-22 00:00:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251171 states. [2020-07-22 00:01:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251171 to 159247. [2020-07-22 00:01:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159247 states. [2020-07-22 00:01:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159247 states to 159247 states and 268073 transitions. [2020-07-22 00:01:01,096 INFO L78 Accepts]: Start accepts. Automaton has 159247 states and 268073 transitions. Word has length 487 [2020-07-22 00:01:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:01:01,097 INFO L479 AbstractCegarLoop]: Abstraction has 159247 states and 268073 transitions. [2020-07-22 00:01:01,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:01:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 159247 states and 268073 transitions. [2020-07-22 00:01:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-22 00:01:01,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:01:01,244 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] [2020-07-22 00:01:01,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:01:01,445 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:01:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:01:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2070221461, now seen corresponding path program 1 times [2020-07-22 00:01:01,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:01:01,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137883066] [2020-07-22 00:01:01,447 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 [2020-07-22 00:01:01,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:01:01,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:01:01,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:01:01,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:01:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:01:02,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:01:02,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137883066] [2020-07-22 00:01:02,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:01:02,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:01:02,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480126587] [2020-07-22 00:01:02,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:01:02,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:01:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:01:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:01:02,789 INFO L87 Difference]: Start difference. First operand 159247 states and 268073 transitions. Second operand 7 states. [2020-07-22 00:01:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:01:15,908 INFO L93 Difference]: Finished difference Result 312359 states and 527080 transitions. [2020-07-22 00:01:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-22 00:01:15,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-22 00:01:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:01:16,298 INFO L225 Difference]: With dead ends: 312359 [2020-07-22 00:01:16,298 INFO L226 Difference]: Without dead ends: 281763 [2020-07-22 00:01:16,383 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 [2020-07-22 00:01:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281763 states. [2020-07-22 00:01:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281763 to 190465. [2020-07-22 00:01:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190465 states. [2020-07-22 00:01:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190465 states to 190465 states and 320622 transitions. [2020-07-22 00:01:24,765 INFO L78 Accepts]: Start accepts. Automaton has 190465 states and 320622 transitions. Word has length 487 [2020-07-22 00:01:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:01:24,766 INFO L479 AbstractCegarLoop]: Abstraction has 190465 states and 320622 transitions. [2020-07-22 00:01:24,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:01:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 190465 states and 320622 transitions. [2020-07-22 00:01:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-22 00:01:24,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:01:24,954 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] [2020-07-22 00:01:25,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:01:25,155 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:01:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:01:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash 61917545, now seen corresponding path program 1 times [2020-07-22 00:01:25,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:01:25,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152740368] [2020-07-22 00:01:25,157 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 [2020-07-22 00:01:26,341 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:01:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:01:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:01:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:01:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:01:26,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:01:26,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152740368] [2020-07-22 00:01:26,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:01:26,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:01:26,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510618869] [2020-07-22 00:01:26,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:01:26,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:01:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:01:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:01:26,574 INFO L87 Difference]: Start difference. First operand 190465 states and 320622 transitions. Second operand 7 states. [2020-07-22 00:01:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:01:41,979 INFO L93 Difference]: Finished difference Result 344025 states and 580372 transitions. [2020-07-22 00:01:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-22 00:01:41,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-22 00:01:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:01:42,336 INFO L225 Difference]: With dead ends: 344025 [2020-07-22 00:01:42,336 INFO L226 Difference]: Without dead ends: 313093 [2020-07-22 00:01:42,417 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 [2020-07-22 00:01:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313093 states. [2020-07-22 00:01:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313093 to 222058. [2020-07-22 00:01:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222058 states. [2020-07-22 00:01:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222058 states to 222058 states and 373797 transitions. [2020-07-22 00:01:57,584 INFO L78 Accepts]: Start accepts. Automaton has 222058 states and 373797 transitions. Word has length 487 [2020-07-22 00:01:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:01:57,585 INFO L479 AbstractCegarLoop]: Abstraction has 222058 states and 373797 transitions. [2020-07-22 00:01:57,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:01:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 222058 states and 373797 transitions. [2020-07-22 00:01:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-22 00:01:57,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:01:57,800 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] [2020-07-22 00:01:58,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:01:58,001 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:01:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:01:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash 361727920, now seen corresponding path program 1 times [2020-07-22 00:01:58,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:01:58,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460995109] [2020-07-22 00:01:58,004 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 [2020-07-22 00:01:58,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:01:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:01:58,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:01:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:01:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:01:58,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:01:58,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460995109] [2020-07-22 00:01:58,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:01:58,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:01:58,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433360580] [2020-07-22 00:01:58,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:01:58,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:01:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:01:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:01:58,609 INFO L87 Difference]: Start difference. First operand 222058 states and 373797 transitions. Second operand 3 states. [2020-07-22 00:02:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:04,292 INFO L93 Difference]: Finished difference Result 342566 states and 576652 transitions. [2020-07-22 00:02:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:02:04,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-22 00:02:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:04,446 INFO L225 Difference]: With dead ends: 342566 [2020-07-22 00:02:04,446 INFO L226 Difference]: Without dead ends: 123711 [2020-07-22 00:02:04,594 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 [2020-07-22 00:02:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123711 states. [2020-07-22 00:02:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123711 to 123709. [2020-07-22 00:02:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123709 states. [2020-07-22 00:02:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123709 states to 123709 states and 207816 transitions. [2020-07-22 00:02:10,386 INFO L78 Accepts]: Start accepts. Automaton has 123709 states and 207816 transitions. Word has length 488 [2020-07-22 00:02:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:10,387 INFO L479 AbstractCegarLoop]: Abstraction has 123709 states and 207816 transitions. [2020-07-22 00:02:10,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 123709 states and 207816 transitions. [2020-07-22 00:02:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-22 00:02:10,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:10,490 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] [2020-07-22 00:02:10,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:10,691 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash 248393120, now seen corresponding path program 1 times [2020-07-22 00:02:10,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:10,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741251863] [2020-07-22 00:02:10,693 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 [2020-07-22 00:02:11,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:11,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:11,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:11,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741251863] [2020-07-22 00:02:11,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:11,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:11,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575342252] [2020-07-22 00:02:11,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:11,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:11,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:11,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:11,247 INFO L87 Difference]: Start difference. First operand 123709 states and 207816 transitions. Second operand 3 states. [2020-07-22 00:02:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:17,731 INFO L93 Difference]: Finished difference Result 246720 states and 414395 transitions. [2020-07-22 00:02:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:02:17,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-22 00:02:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:17,895 INFO L225 Difference]: With dead ends: 246720 [2020-07-22 00:02:17,895 INFO L226 Difference]: Without dead ends: 123591 [2020-07-22 00:02:18,003 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 [2020-07-22 00:02:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123591 states. [2020-07-22 00:02:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123591 to 123591. [2020-07-22 00:02:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123591 states. [2020-07-22 00:02:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123591 states to 123591 states and 207359 transitions. [2020-07-22 00:02:23,150 INFO L78 Accepts]: Start accepts. Automaton has 123591 states and 207359 transitions. Word has length 488 [2020-07-22 00:02:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:23,151 INFO L479 AbstractCegarLoop]: Abstraction has 123591 states and 207359 transitions. [2020-07-22 00:02:23,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 123591 states and 207359 transitions. [2020-07-22 00:02:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-22 00:02:23,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:23,244 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] [2020-07-22 00:02:23,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:23,444 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1495583451, now seen corresponding path program 1 times [2020-07-22 00:02:23,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:23,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58175227] [2020-07-22 00:02:23,446 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 [2020-07-22 00:02:23,899 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:24,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:24,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58175227] [2020-07-22 00:02:24,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:24,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:24,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092523874] [2020-07-22 00:02:24,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:24,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:24,115 INFO L87 Difference]: Start difference. First operand 123591 states and 207359 transitions. Second operand 3 states. [2020-07-22 00:02:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:27,056 INFO L93 Difference]: Finished difference Result 182998 states and 307153 transitions. [2020-07-22 00:02:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:02:27,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-22 00:02:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:27,125 INFO L225 Difference]: With dead ends: 182998 [2020-07-22 00:02:27,126 INFO L226 Difference]: Without dead ends: 61323 [2020-07-22 00:02:29,977 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 [2020-07-22 00:02:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61323 states. [2020-07-22 00:02:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61323 to 61321. [2020-07-22 00:02:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61321 states. [2020-07-22 00:02:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61321 states to 61321 states and 102703 transitions. [2020-07-22 00:02:32,391 INFO L78 Accepts]: Start accepts. Automaton has 61321 states and 102703 transitions. Word has length 492 [2020-07-22 00:02:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:32,391 INFO L479 AbstractCegarLoop]: Abstraction has 61321 states and 102703 transitions. [2020-07-22 00:02:32,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 61321 states and 102703 transitions. [2020-07-22 00:02:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-22 00:02:32,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:32,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:02:32,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:32,630 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1667862974, now seen corresponding path program 1 times [2020-07-22 00:02:32,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:32,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114922203] [2020-07-22 00:02:32,632 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 [2020-07-22 00:02:33,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:33,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:33,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:33,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114922203] [2020-07-22 00:02:33,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:33,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:33,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262554791] [2020-07-22 00:02:33,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:33,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:33,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:33,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:33,194 INFO L87 Difference]: Start difference. First operand 61321 states and 102703 transitions. Second operand 3 states. [2020-07-22 00:02:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:34,308 INFO L93 Difference]: Finished difference Result 90557 states and 151708 transitions. [2020-07-22 00:02:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:02:34,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-22 00:02:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:34,342 INFO L225 Difference]: With dead ends: 90557 [2020-07-22 00:02:34,342 INFO L226 Difference]: Without dead ends: 30559 [2020-07-22 00:02:34,391 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 [2020-07-22 00:02:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30559 states. [2020-07-22 00:02:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30559 to 30557. [2020-07-22 00:02:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30557 states. [2020-07-22 00:02:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30557 states to 30557 states and 51096 transitions. [2020-07-22 00:02:35,814 INFO L78 Accepts]: Start accepts. Automaton has 30557 states and 51096 transitions. Word has length 496 [2020-07-22 00:02:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:35,814 INFO L479 AbstractCegarLoop]: Abstraction has 30557 states and 51096 transitions. [2020-07-22 00:02:35,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30557 states and 51096 transitions. [2020-07-22 00:02:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-22 00:02:35,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:35,835 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] [2020-07-22 00:02:36,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:36,036 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1349161951, now seen corresponding path program 1 times [2020-07-22 00:02:36,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:36,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418178442] [2020-07-22 00:02:36,038 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 [2020-07-22 00:02:36,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:36,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:36,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418178442] [2020-07-22 00:02:36,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:36,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:36,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671231964] [2020-07-22 00:02:36,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:36,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:36,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:36,611 INFO L87 Difference]: Start difference. First operand 30557 states and 51096 transitions. Second operand 3 states. [2020-07-22 00:02:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:37,222 INFO L93 Difference]: Finished difference Result 44919 states and 75113 transitions. [2020-07-22 00:02:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:02:37,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-22 00:02:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:37,241 INFO L225 Difference]: With dead ends: 44919 [2020-07-22 00:02:37,241 INFO L226 Difference]: Without dead ends: 15395 [2020-07-22 00:02:37,268 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 [2020-07-22 00:02:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15395 states. [2020-07-22 00:02:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15395 to 15393. [2020-07-22 00:02:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15393 states. [2020-07-22 00:02:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15393 states to 15393 states and 25706 transitions. [2020-07-22 00:02:37,800 INFO L78 Accepts]: Start accepts. Automaton has 15393 states and 25706 transitions. Word has length 500 [2020-07-22 00:02:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:37,800 INFO L479 AbstractCegarLoop]: Abstraction has 15393 states and 25706 transitions. [2020-07-22 00:02:37,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 15393 states and 25706 transitions. [2020-07-22 00:02:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-22 00:02:37,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:37,812 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] [2020-07-22 00:02:38,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:38,025 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:38,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1058528845, now seen corresponding path program 1 times [2020-07-22 00:02:38,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:38,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264330203] [2020-07-22 00:02:38,027 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 [2020-07-22 00:02:38,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:38,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:38,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:38,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264330203] [2020-07-22 00:02:38,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:38,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:38,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298760308] [2020-07-22 00:02:38,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:38,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:38,731 INFO L87 Difference]: Start difference. First operand 15393 states and 25706 transitions. Second operand 3 states. [2020-07-22 00:02:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:39,260 INFO L93 Difference]: Finished difference Result 30122 states and 50263 transitions. [2020-07-22 00:02:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:02:39,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-22 00:02:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:39,279 INFO L225 Difference]: With dead ends: 30122 [2020-07-22 00:02:39,279 INFO L226 Difference]: Without dead ends: 15393 [2020-07-22 00:02:39,295 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 [2020-07-22 00:02:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15393 states. [2020-07-22 00:02:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15393 to 15393. [2020-07-22 00:02:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15393 states. [2020-07-22 00:02:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15393 states to 15393 states and 25705 transitions. [2020-07-22 00:02:39,829 INFO L78 Accepts]: Start accepts. Automaton has 15393 states and 25705 transitions. Word has length 501 [2020-07-22 00:02:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:39,829 INFO L479 AbstractCegarLoop]: Abstraction has 15393 states and 25705 transitions. [2020-07-22 00:02:39,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 15393 states and 25705 transitions. [2020-07-22 00:02:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-22 00:02:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:39,841 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] [2020-07-22 00:02:40,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:40,042 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash 26522856, now seen corresponding path program 1 times [2020-07-22 00:02:40,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:40,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845533798] [2020-07-22 00:02:40,044 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 [2020-07-22 00:02:40,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:40,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:40,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:02:40,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:40,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:40,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845533798] [2020-07-22 00:02:40,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:40,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:02:40,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800611589] [2020-07-22 00:02:40,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:02:40,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:02:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:02:40,660 INFO L87 Difference]: Start difference. First operand 15393 states and 25705 transitions. Second operand 4 states. [2020-07-22 00:02:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:42,079 INFO L93 Difference]: Finished difference Result 44578 states and 74386 transitions. [2020-07-22 00:02:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:02:42,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-22 00:02:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:42,113 INFO L225 Difference]: With dead ends: 44578 [2020-07-22 00:02:42,113 INFO L226 Difference]: Without dead ends: 29930 [2020-07-22 00:02:42,131 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 [2020-07-22 00:02:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29930 states. [2020-07-22 00:02:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29930 to 27798. [2020-07-22 00:02:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27798 states. [2020-07-22 00:02:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27798 states to 27798 states and 46267 transitions. [2020-07-22 00:02:43,148 INFO L78 Accepts]: Start accepts. Automaton has 27798 states and 46267 transitions. Word has length 505 [2020-07-22 00:02:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:43,148 INFO L479 AbstractCegarLoop]: Abstraction has 27798 states and 46267 transitions. [2020-07-22 00:02:43,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:02:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 27798 states and 46267 transitions. [2020-07-22 00:02:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-22 00:02:43,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:43,168 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] [2020-07-22 00:02:43,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:43,369 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -920176291, now seen corresponding path program 1 times [2020-07-22 00:02:43,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:43,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767527691] [2020-07-22 00:02:43,371 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 [2020-07-22 00:02:43,826 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:43,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:02:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:44,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:44,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767527691] [2020-07-22 00:02:44,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:44,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:02:44,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462878675] [2020-07-22 00:02:44,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:02:44,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:02:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:02:44,170 INFO L87 Difference]: Start difference. First operand 27798 states and 46267 transitions. Second operand 4 states. [2020-07-22 00:02:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:46,359 INFO L93 Difference]: Finished difference Result 81639 states and 135832 transitions. [2020-07-22 00:02:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:02:46,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-22 00:02:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:46,423 INFO L225 Difference]: With dead ends: 81639 [2020-07-22 00:02:46,423 INFO L226 Difference]: Without dead ends: 54586 [2020-07-22 00:02:46,457 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 [2020-07-22 00:02:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54586 states. [2020-07-22 00:02:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54586 to 50374. [2020-07-22 00:02:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50374 states. [2020-07-22 00:02:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 83580 transitions. [2020-07-22 00:02:48,554 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 83580 transitions. Word has length 506 [2020-07-22 00:02:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:48,554 INFO L479 AbstractCegarLoop]: Abstraction has 50374 states and 83580 transitions. [2020-07-22 00:02:48,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:02:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 83580 transitions. [2020-07-22 00:02:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-22 00:02:48,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:48,591 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] [2020-07-22 00:02:48,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:48,792 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash 304023201, now seen corresponding path program 1 times [2020-07-22 00:02:48,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:48,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451071399] [2020-07-22 00:02:48,794 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 [2020-07-22 00:02:49,242 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:49,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:02:49,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:49,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:49,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451071399] [2020-07-22 00:02:49,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:49,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:02:49,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789443810] [2020-07-22 00:02:49,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:02:49,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:02:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:02:49,393 INFO L87 Difference]: Start difference. First operand 50374 states and 83580 transitions. Second operand 4 states. [2020-07-22 00:02:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:53,680 INFO L93 Difference]: Finished difference Result 149025 states and 247231 transitions. [2020-07-22 00:02:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:02:53,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-22 00:02:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:53,801 INFO L225 Difference]: With dead ends: 149025 [2020-07-22 00:02:53,802 INFO L226 Difference]: Without dead ends: 99396 [2020-07-22 00:02:53,866 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 [2020-07-22 00:02:53,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99396 states. [2020-07-22 00:02:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99396 to 91071. [2020-07-22 00:02:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91071 states. [2020-07-22 00:02:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91071 states to 91071 states and 150646 transitions. [2020-07-22 00:02:58,495 INFO L78 Accepts]: Start accepts. Automaton has 91071 states and 150646 transitions. Word has length 507 [2020-07-22 00:02:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:58,495 INFO L479 AbstractCegarLoop]: Abstraction has 91071 states and 150646 transitions. [2020-07-22 00:02:58,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:02:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 91071 states and 150646 transitions. [2020-07-22 00:02:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-22 00:02:58,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:58,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:02:58,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:58,759 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash 106603766, now seen corresponding path program 1 times [2020-07-22 00:02:58,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:58,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065488970] [2020-07-22 00:02:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-22 00:02:59,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:59,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:59,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:02:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:59,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:59,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065488970] [2020-07-22 00:02:59,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:59,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:02:59,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455772765] [2020-07-22 00:02:59,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:02:59,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:02:59,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:02:59,381 INFO L87 Difference]: Start difference. First operand 91071 states and 150646 transitions. Second operand 4 states. [2020-07-22 00:03:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:03:07,855 INFO L93 Difference]: Finished difference Result 266359 states and 440638 transitions. [2020-07-22 00:03:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:03:07,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-07-22 00:03:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:03:08,051 INFO L225 Difference]: With dead ends: 266359 [2020-07-22 00:03:08,052 INFO L226 Difference]: Without dead ends: 176033 [2020-07-22 00:03:08,139 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 [2020-07-22 00:03:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176033 states. [2020-07-22 00:03:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176033 to 161588. [2020-07-22 00:03:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161588 states. [2020-07-22 00:03:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161588 states to 161588 states and 266522 transitions. [2020-07-22 00:03:20,356 INFO L78 Accepts]: Start accepts. Automaton has 161588 states and 266522 transitions. Word has length 508 [2020-07-22 00:03:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:03:20,356 INFO L479 AbstractCegarLoop]: Abstraction has 161588 states and 266522 transitions. [2020-07-22 00:03:20,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:03:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 161588 states and 266522 transitions. [2020-07-22 00:03:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-22 00:03:20,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:03:20,510 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] [2020-07-22 00:03:20,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:03:20,711 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:03:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:03:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1211329446, now seen corresponding path program 1 times [2020-07-22 00:03:20,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:03:20,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496243439] [2020-07-22 00:03:20,713 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 [2020-07-22 00:03:21,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:03:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:03:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:03:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:03:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:03:21,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:03:21,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496243439] [2020-07-22 00:03:21,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:03:21,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:03:21,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319188515] [2020-07-22 00:03:21,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:03:21,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:03:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:03:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:03:21,303 INFO L87 Difference]: Start difference. First operand 161588 states and 266522 transitions. Second operand 4 states. [2020-07-22 00:03:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:03:34,413 INFO L93 Difference]: Finished difference Result 460601 states and 760134 transitions. [2020-07-22 00:03:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:03:34,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-22 00:03:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:03:34,763 INFO L225 Difference]: With dead ends: 460601 [2020-07-22 00:03:34,763 INFO L226 Difference]: Without dead ends: 303473 [2020-07-22 00:03:34,883 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 [2020-07-22 00:03:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303473 states. [2020-07-22 00:03:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303473 to 280651. [2020-07-22 00:03:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280651 states. [2020-07-22 00:03:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280651 states to 280651 states and 461781 transitions. [2020-07-22 00:03:53,014 INFO L78 Accepts]: Start accepts. Automaton has 280651 states and 461781 transitions. Word has length 509 [2020-07-22 00:03:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:03:53,015 INFO L479 AbstractCegarLoop]: Abstraction has 280651 states and 461781 transitions. [2020-07-22 00:03:53,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:03:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 280651 states and 461781 transitions. [2020-07-22 00:03:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-22 00:03:53,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:03:53,251 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] [2020-07-22 00:03:53,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:03:53,452 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:03:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:03:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1884302537, now seen corresponding path program 1 times [2020-07-22 00:03:53,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:03:53,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530918846] [2020-07-22 00:03:53,454 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 [2020-07-22 00:03:53,900 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:03:53,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:03:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2176 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:03:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:03:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:03:54,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:03:54,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530918846] [2020-07-22 00:03:54,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:03:54,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:03:54,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227220616] [2020-07-22 00:03:54,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:03:54,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:03:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:03:54,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:03:54,101 INFO L87 Difference]: Start difference. First operand 280651 states and 461781 transitions. Second operand 4 states. [2020-07-22 00:04:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:04:12,775 INFO L93 Difference]: Finished difference Result 403171 states and 664488 transitions. [2020-07-22 00:04:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:04:12,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-22 00:04:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:04:13,242 INFO L225 Difference]: With dead ends: 403171 [2020-07-22 00:04:13,243 INFO L226 Difference]: Without dead ends: 340321 [2020-07-22 00:04:13,349 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 [2020-07-22 00:04:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340321 states. [2020-07-22 00:04:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340321 to 318030. [2020-07-22 00:04:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318030 states. [2020-07-22 00:04:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318030 states to 318030 states and 523238 transitions. [2020-07-22 00:04:35,548 INFO L78 Accepts]: Start accepts. Automaton has 318030 states and 523238 transitions. Word has length 509 [2020-07-22 00:04:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:04:35,549 INFO L479 AbstractCegarLoop]: Abstraction has 318030 states and 523238 transitions. [2020-07-22 00:04:35,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:04:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 318030 states and 523238 transitions. [2020-07-22 00:04:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-22 00:04:35,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:04:35,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:04:36,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:04:36,016 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:04:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:04:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1849533820, now seen corresponding path program 1 times [2020-07-22 00:04:36,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:04:36,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928020739] [2020-07-22 00:04:36,018 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 [2020-07-22 00:04:36,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:04:36,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:04:36,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 2175 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-22 00:04:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:04:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:04:36,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:04:36,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928020739] [2020-07-22 00:04:36,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:04:36,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:04:36,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982811085] [2020-07-22 00:04:36,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:04:36,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:04:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:04:36,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:04:36,586 INFO L87 Difference]: Start difference. First operand 318030 states and 523238 transitions. Second operand 3 states. [2020-07-22 00:05:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:05:00,220 INFO L93 Difference]: Finished difference Result 688291 states and 1133070 transitions. [2020-07-22 00:05:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:05:00,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-07-22 00:05:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:05:01,018 INFO L225 Difference]: With dead ends: 688291 [2020-07-22 00:05:01,018 INFO L226 Difference]: Without dead ends: 531845 [2020-07-22 00:05:01,202 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 [2020-07-22 00:05:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531845 states. [2020-07-22 00:05:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531845 to 531409. [2020-07-22 00:05:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531409 states. [2020-07-22 00:05:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531409 states to 531409 states and 873533 transitions. [2020-07-22 00:05:37,153 INFO L78 Accepts]: Start accepts. Automaton has 531409 states and 873533 transitions. Word has length 510 [2020-07-22 00:05:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:05:37,153 INFO L479 AbstractCegarLoop]: Abstraction has 531409 states and 873533 transitions. [2020-07-22 00:05:37,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:05:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 531409 states and 873533 transitions. [2020-07-22 00:05:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-22 00:05:37,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:05:37,632 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] [2020-07-22 00:05:37,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:05:37,833 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:05:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:05:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash -728229181, now seen corresponding path program 1 times [2020-07-22 00:05:37,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:05:37,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297914778] [2020-07-22 00:05:37,835 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 [2020-07-22 00:05:38,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:05:38,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:05:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:05:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:05:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:05:38,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:05:38,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297914778] [2020-07-22 00:05:38,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:05:38,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:05:38,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197790122] [2020-07-22 00:05:38,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:05:38,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:05:38,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:05:38,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:05:38,571 INFO L87 Difference]: Start difference. First operand 531409 states and 873533 transitions. Second operand 7 states. [2020-07-22 00:06:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:06:41,375 INFO L93 Difference]: Finished difference Result 1530242 states and 2512108 transitions. [2020-07-22 00:06:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-22 00:06:41,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-22 00:06:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:06:42,996 INFO L225 Difference]: With dead ends: 1530242 [2020-07-22 00:06:42,996 INFO L226 Difference]: Without dead ends: 1000365 [2020-07-22 00:06:43,465 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 [2020-07-22 00:06:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000365 states. [2020-07-22 00:07:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000365 to 531409. [2020-07-22 00:07:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531409 states. [2020-07-22 00:07:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531409 states to 531409 states and 864163 transitions. [2020-07-22 00:07:44,211 INFO L78 Accepts]: Start accepts. Automaton has 531409 states and 864163 transitions. Word has length 511 [2020-07-22 00:07:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:07:44,211 INFO L479 AbstractCegarLoop]: Abstraction has 531409 states and 864163 transitions. [2020-07-22 00:07:44,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:07:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 531409 states and 864163 transitions. [2020-07-22 00:07:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-22 00:07:44,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:07:44,856 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] [2020-07-22 00:07:45,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:07:45,067 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:07:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:07:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2103082301, now seen corresponding path program 1 times [2020-07-22 00:07:45,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:07:45,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996253098] [2020-07-22 00:07:45,070 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 [2020-07-22 00:07:45,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:07:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:07:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-22 00:07:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:07:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:07:45,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:07:45,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996253098] [2020-07-22 00:07:45,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:07:45,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-22 00:07:45,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145443265] [2020-07-22 00:07:45,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-22 00:07:45,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:07:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-22 00:07:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-22 00:07:45,931 INFO L87 Difference]: Start difference. First operand 531409 states and 864163 transitions. Second operand 7 states. [2020-07-22 00:09:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:09:01,309 INFO L93 Difference]: Finished difference Result 1424028 states and 2309832 transitions. [2020-07-22 00:09:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-22 00:09:01,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-22 00:09:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:09:03,046 INFO L225 Difference]: With dead ends: 1424028 [2020-07-22 00:09:03,046 INFO L226 Difference]: Without dead ends: 990917 [2020-07-22 00:09:03,513 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 [2020-07-22 00:09:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990917 states. [2020-07-22 00:09:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990917 to 531409. [2020-07-22 00:09:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531409 states. [2020-07-22 00:10:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531409 states to 531409 states and 864161 transitions. [2020-07-22 00:10:00,947 INFO L78 Accepts]: Start accepts. Automaton has 531409 states and 864161 transitions. Word has length 511 [2020-07-22 00:10:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:10:00,948 INFO L479 AbstractCegarLoop]: Abstraction has 531409 states and 864161 transitions. [2020-07-22 00:10:00,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-22 00:10:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 531409 states and 864161 transitions. [2020-07-22 00:10:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-22 00:10:02,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:10:02,750 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] [2020-07-22 00:10:02,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:10:02,951 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:10:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:10:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1228696802, now seen corresponding path program 1 times [2020-07-22 00:10:02,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:10:02,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572085475] [2020-07-22 00:10:02,953 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 [2020-07-22 00:10:03,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:10:03,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:10:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:10:03,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:10:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:10:03,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:10:03,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572085475] [2020-07-22 00:10:03,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:10:03,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:10:03,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409605120] [2020-07-22 00:10:03,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:10:03,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:10:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:10:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:10:03,563 INFO L87 Difference]: Start difference. First operand 531409 states and 864161 transitions. Second operand 3 states. [2020-07-22 00:10:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:10:29,760 INFO L93 Difference]: Finished difference Result 780387 states and 1269220 transitions. [2020-07-22 00:10:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:10:29,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 511 [2020-07-22 00:10:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:10:30,114 INFO L225 Difference]: With dead ends: 780387 [2020-07-22 00:10:30,115 INFO L226 Difference]: Without dead ends: 250380 [2020-07-22 00:10:30,502 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 [2020-07-22 00:10:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250380 states.