/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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:51:10,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:51:10,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:51:10,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:51:10,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:51:10,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:51:10,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:51:10,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:51:10,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:51:10,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:51:10,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:51:10,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:51:10,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:51:10,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:51:10,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:51:10,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:51:10,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:51:10,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:51:10,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:51:10,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:51:10,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:51:10,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:51:10,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:51:10,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:51:10,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:51:10,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:51:10,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:51:10,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:51:10,669 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 23:51:10,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:51:10,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:51:10,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:51:10,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:51:10,686 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:51:10,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:51:10,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:51:10,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:51:10,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:51:10,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:51:10,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:51:10,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:51:10,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:51:10,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:51:10,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:51:10,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:51:10,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:51:10,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:51:10,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:51:10,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:51:10,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:51:10,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:51:10,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:51:10,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:51:10,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:51:10,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:51:10,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:10,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:51:10,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:51:10,691 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 23:51:10,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:51:10,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:51:10,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:51:10,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:51:10,990 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:51:10,991 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 23:51:11,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27587126/44cebf7ed71646dbb3f3bfa37390f9b7/FLAG4084b7e76 [2020-07-21 23:51:11,725 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:51:11,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 23:51:11,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27587126/44cebf7ed71646dbb3f3bfa37390f9b7/FLAG4084b7e76 [2020-07-21 23:51:11,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27587126/44cebf7ed71646dbb3f3bfa37390f9b7 [2020-07-21 23:51:11,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:51:11,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:51:11,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:51:11,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:51:11,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:51:11,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:11" (1/1) ... [2020-07-21 23:51:11,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b045c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:11, skipping insertion in model container [2020-07-21 23:51:11,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:11" (1/1) ... [2020-07-21 23:51:11,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:51:12,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:51:12,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:51:12,897 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:51:13,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:51:13,675 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:51:13,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13 WrapperNode [2020-07-21 23:51:13,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:51:13,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:51:13,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:51:13,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:51:13,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (1/1) ... [2020-07-21 23:51:13,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:51:13,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:51:13,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:51:13,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:51:13,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (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 23:51:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:51:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:51:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:51:13,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:51:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:51:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:51:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 23:51:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:51:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:51:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:51:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:51:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:51:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:51:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:51:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:51:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:51:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:51:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:51:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:51:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:51:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:51:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:51:16,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:51:16,482 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:51:16,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:16 BoogieIcfgContainer [2020-07-21 23:51:16,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:51:16,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:51:16,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:51:16,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:51:16,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:51:11" (1/3) ... [2020-07-21 23:51:16,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dd6a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:16, skipping insertion in model container [2020-07-21 23:51:16,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:13" (2/3) ... [2020-07-21 23:51:16,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dd6a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:16, skipping insertion in model container [2020-07-21 23:51:16,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:16" (3/3) ... [2020-07-21 23:51:16,500 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 23:51:16,510 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:51:16,519 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:51:16,533 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:51:16,559 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:51:16,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:51:16,560 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:51:16,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:51:16,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:51:16,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:51:16,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:51:16,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:51:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-21 23:51:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 23:51:16,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:16,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:16,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-21 23:51:16,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:16,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279035110] [2020-07-21 23:51:16,650 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 23:51:17,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:17,380 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 23:51:17,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:17,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279035110] [2020-07-21 23:51:17,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:17,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:17,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630229719] [2020-07-21 23:51:17,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:17,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:17,406 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-07-21 23:51:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:17,677 INFO L93 Difference]: Finished difference Result 2372 states and 4213 transitions. [2020-07-21 23:51:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:51:17,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 23:51:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:17,708 INFO L225 Difference]: With dead ends: 2372 [2020-07-21 23:51:17,708 INFO L226 Difference]: Without dead ends: 1571 [2020-07-21 23:51:17,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2020-07-21 23:51:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1569. [2020-07-21 23:51:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1569 states. [2020-07-21 23:51:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2435 transitions. [2020-07-21 23:51:17,876 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2435 transitions. Word has length 330 [2020-07-21 23:51:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:17,879 INFO L479 AbstractCegarLoop]: Abstraction has 1569 states and 2435 transitions. [2020-07-21 23:51:17,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2435 transitions. [2020-07-21 23:51:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:51:17,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:17,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:18,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:18,109 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash -204785929, now seen corresponding path program 1 times [2020-07-21 23:51:18,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:18,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241105280] [2020-07-21 23:51:18,112 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 23:51:18,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:18,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:18,611 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 23:51:18,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:18,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241105280] [2020-07-21 23:51:18,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:18,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:18,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142930524] [2020-07-21 23:51:18,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:18,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:18,616 INFO L87 Difference]: Start difference. First operand 1569 states and 2435 transitions. Second operand 3 states. [2020-07-21 23:51:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:18,777 INFO L93 Difference]: Finished difference Result 4516 states and 6977 transitions. [2020-07-21 23:51:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:18,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:51:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:18,794 INFO L225 Difference]: With dead ends: 4516 [2020-07-21 23:51:18,794 INFO L226 Difference]: Without dead ends: 3076 [2020-07-21 23:51:18,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-07-21 23:51:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3074. [2020-07-21 23:51:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3074 states. [2020-07-21 23:51:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4747 transitions. [2020-07-21 23:51:18,909 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4747 transitions. Word has length 332 [2020-07-21 23:51:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:18,910 INFO L479 AbstractCegarLoop]: Abstraction has 3074 states and 4747 transitions. [2020-07-21 23:51:18,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4747 transitions. [2020-07-21 23:51:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:51:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:18,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:19,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:19,137 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1084618052, now seen corresponding path program 1 times [2020-07-21 23:51:19,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:19,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369005590] [2020-07-21 23:51:19,139 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 23:51:19,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:19,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:19,506 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 23:51:19,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:19,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369005590] [2020-07-21 23:51:19,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:19,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:19,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352278961] [2020-07-21 23:51:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:19,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:19,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:19,509 INFO L87 Difference]: Start difference. First operand 3074 states and 4747 transitions. Second operand 3 states. [2020-07-21 23:51:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:19,759 INFO L93 Difference]: Finished difference Result 9147 states and 14117 transitions. [2020-07-21 23:51:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:19,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:51:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:19,787 INFO L225 Difference]: With dead ends: 9147 [2020-07-21 23:51:19,787 INFO L226 Difference]: Without dead ends: 6115 [2020-07-21 23:51:19,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2020-07-21 23:51:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 3093. [2020-07-21 23:51:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3093 states. [2020-07-21 23:51:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 4775 transitions. [2020-07-21 23:51:19,939 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 4775 transitions. Word has length 332 [2020-07-21 23:51:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:19,939 INFO L479 AbstractCegarLoop]: Abstraction has 3093 states and 4775 transitions. [2020-07-21 23:51:19,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 4775 transitions. [2020-07-21 23:51:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 23:51:19,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:19,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:20,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:20,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1652172680, now seen corresponding path program 1 times [2020-07-21 23:51:20,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:20,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522845952] [2020-07-21 23:51:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:51:20,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:20,484 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 23:51:20,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:20,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522845952] [2020-07-21 23:51:20,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:20,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:20,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154417519] [2020-07-21 23:51:20,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:20,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:20,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:20,488 INFO L87 Difference]: Start difference. First operand 3093 states and 4775 transitions. Second operand 3 states. [2020-07-21 23:51:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:20,749 INFO L93 Difference]: Finished difference Result 9166 states and 14138 transitions. [2020-07-21 23:51:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:20,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 23:51:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:20,778 INFO L225 Difference]: With dead ends: 9166 [2020-07-21 23:51:20,778 INFO L226 Difference]: Without dead ends: 6133 [2020-07-21 23:51:20,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2020-07-21 23:51:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 3111. [2020-07-21 23:51:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3111 states. [2020-07-21 23:51:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4796 transitions. [2020-07-21 23:51:20,948 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4796 transitions. Word has length 333 [2020-07-21 23:51:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:20,948 INFO L479 AbstractCegarLoop]: Abstraction has 3111 states and 4796 transitions. [2020-07-21 23:51:20,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4796 transitions. [2020-07-21 23:51:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:51:20,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:20,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:21,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:21,173 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash 381313074, now seen corresponding path program 1 times [2020-07-21 23:51:21,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:21,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877367975] [2020-07-21 23:51:21,174 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 23:51:21,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:21,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:21,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:21,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877367975] [2020-07-21 23:51:21,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:21,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:21,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327848030] [2020-07-21 23:51:21,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:21,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:21,561 INFO L87 Difference]: Start difference. First operand 3111 states and 4796 transitions. Second operand 4 states. [2020-07-21 23:51:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:21,800 INFO L93 Difference]: Finished difference Result 6883 states and 10592 transitions. [2020-07-21 23:51:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:21,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 23:51:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:21,816 INFO L225 Difference]: With dead ends: 6883 [2020-07-21 23:51:21,816 INFO L226 Difference]: Without dead ends: 3564 [2020-07-21 23:51:21,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2020-07-21 23:51:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3562. [2020-07-21 23:51:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3562 states. [2020-07-21 23:51:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 5470 transitions. [2020-07-21 23:51:21,963 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 5470 transitions. Word has length 334 [2020-07-21 23:51:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:21,964 INFO L479 AbstractCegarLoop]: Abstraction has 3562 states and 5470 transitions. [2020-07-21 23:51:21,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 5470 transitions. [2020-07-21 23:51:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:51:21,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:21,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:22,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:22,188 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:22,188 INFO L82 PathProgramCache]: Analyzing trace with hash -852397371, now seen corresponding path program 1 times [2020-07-21 23:51:22,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:22,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030694068] [2020-07-21 23:51:22,189 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 23:51:22,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:22,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:22,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:22,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030694068] [2020-07-21 23:51:22,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:22,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:22,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124128755] [2020-07-21 23:51:22,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:22,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:22,579 INFO L87 Difference]: Start difference. First operand 3562 states and 5470 transitions. Second operand 3 states. [2020-07-21 23:51:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:22,804 INFO L93 Difference]: Finished difference Result 10130 states and 15474 transitions. [2020-07-21 23:51:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:22,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:51:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:22,838 INFO L225 Difference]: With dead ends: 10130 [2020-07-21 23:51:22,838 INFO L226 Difference]: Without dead ends: 6857 [2020-07-21 23:51:22,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 23:51:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2020-07-21 23:51:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 3596. [2020-07-21 23:51:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3596 states. [2020-07-21 23:51:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 5514 transitions. [2020-07-21 23:51:23,015 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 5514 transitions. Word has length 336 [2020-07-21 23:51:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:23,016 INFO L479 AbstractCegarLoop]: Abstraction has 3596 states and 5514 transitions. [2020-07-21 23:51:23,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 5514 transitions. [2020-07-21 23:51:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:51:23,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:23,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:23,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:23,240 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:23,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2139573579, now seen corresponding path program 1 times [2020-07-21 23:51:23,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:23,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842420498] [2020-07-21 23:51:23,241 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 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 23:51:23,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:23,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:23,648 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 23:51:23,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:23,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842420498] [2020-07-21 23:51:23,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:23,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:23,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260063720] [2020-07-21 23:51:23,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:23,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:23,651 INFO L87 Difference]: Start difference. First operand 3596 states and 5514 transitions. Second operand 3 states. [2020-07-21 23:51:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:23,930 INFO L93 Difference]: Finished difference Result 10101 states and 15404 transitions. [2020-07-21 23:51:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:23,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:51:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:23,947 INFO L225 Difference]: With dead ends: 10101 [2020-07-21 23:51:23,947 INFO L226 Difference]: Without dead ends: 6933 [2020-07-21 23:51:23,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 23:51:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2020-07-21 23:51:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6931. [2020-07-21 23:51:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6931 states. [2020-07-21 23:51:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 10557 transitions. [2020-07-21 23:51:24,200 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 10557 transitions. Word has length 336 [2020-07-21 23:51:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:24,200 INFO L479 AbstractCegarLoop]: Abstraction has 6931 states and 10557 transitions. [2020-07-21 23:51:24,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 10557 transitions. [2020-07-21 23:51:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:51:24,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:24,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:24,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:24,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 750611576, now seen corresponding path program 1 times [2020-07-21 23:51:24,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:24,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425373301] [2020-07-21 23:51:24,433 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 23:51:24,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:51:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:24,900 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 23:51:24,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:24,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425373301] [2020-07-21 23:51:24,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:24,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:24,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363775944] [2020-07-21 23:51:24,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:24,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:24,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:24,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:24,904 INFO L87 Difference]: Start difference. First operand 6931 states and 10557 transitions. Second operand 4 states. [2020-07-21 23:51:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:25,322 INFO L93 Difference]: Finished difference Result 18517 states and 27990 transitions. [2020-07-21 23:51:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:25,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 23:51:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:25,352 INFO L225 Difference]: With dead ends: 18517 [2020-07-21 23:51:25,352 INFO L226 Difference]: Without dead ends: 12413 [2020-07-21 23:51:25,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2020-07-21 23:51:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 7204. [2020-07-21 23:51:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7204 states. [2020-07-21 23:51:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 10990 transitions. [2020-07-21 23:51:25,693 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 10990 transitions. Word has length 336 [2020-07-21 23:51:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:25,693 INFO L479 AbstractCegarLoop]: Abstraction has 7204 states and 10990 transitions. [2020-07-21 23:51:25,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 10990 transitions. [2020-07-21 23:51:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:51:25,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:25,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:25,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:25,924 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:25,924 INFO L82 PathProgramCache]: Analyzing trace with hash -321046049, now seen corresponding path program 1 times [2020-07-21 23:51:25,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:25,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608341977] [2020-07-21 23:51:25,925 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 23:51:26,175 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:51:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:26,440 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 23:51:26,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608341977] [2020-07-21 23:51:26,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:26,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:51:26,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171818296] [2020-07-21 23:51:26,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:51:26,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:26,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:51:26,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:51:26,443 INFO L87 Difference]: Start difference. First operand 7204 states and 10990 transitions. Second operand 8 states. [2020-07-21 23:51:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:28,416 INFO L93 Difference]: Finished difference Result 15953 states and 24439 transitions. [2020-07-21 23:51:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:51:28,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 23:51:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:28,442 INFO L225 Difference]: With dead ends: 15953 [2020-07-21 23:51:28,442 INFO L226 Difference]: Without dead ends: 11499 [2020-07-21 23:51:28,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 23:51:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2020-07-21 23:51:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 9198. [2020-07-21 23:51:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9198 states. [2020-07-21 23:51:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9198 states to 9198 states and 13890 transitions. [2020-07-21 23:51:28,977 INFO L78 Accepts]: Start accepts. Automaton has 9198 states and 13890 transitions. Word has length 336 [2020-07-21 23:51:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:28,977 INFO L479 AbstractCegarLoop]: Abstraction has 9198 states and 13890 transitions. [2020-07-21 23:51:28,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:51:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 9198 states and 13890 transitions. [2020-07-21 23:51:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:51:28,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:28,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:29,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:29,207 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1807907102, now seen corresponding path program 1 times [2020-07-21 23:51:29,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:29,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245999265] [2020-07-21 23:51:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:29,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:29,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:29,547 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 23:51:29,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:29,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245999265] [2020-07-21 23:51:29,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:29,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:29,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852176985] [2020-07-21 23:51:29,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:29,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:29,549 INFO L87 Difference]: Start difference. First operand 9198 states and 13890 transitions. Second operand 3 states. [2020-07-21 23:51:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:29,977 INFO L93 Difference]: Finished difference Result 17654 states and 26648 transitions. [2020-07-21 23:51:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:29,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:51:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:30,000 INFO L225 Difference]: With dead ends: 17654 [2020-07-21 23:51:30,001 INFO L226 Difference]: Without dead ends: 11050 [2020-07-21 23:51:30,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 23:51:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11050 states. [2020-07-21 23:51:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11050 to 9696. [2020-07-21 23:51:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9696 states. [2020-07-21 23:51:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9696 states to 9696 states and 14708 transitions. [2020-07-21 23:51:30,510 INFO L78 Accepts]: Start accepts. Automaton has 9696 states and 14708 transitions. Word has length 336 [2020-07-21 23:51:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:30,510 INFO L479 AbstractCegarLoop]: Abstraction has 9696 states and 14708 transitions. [2020-07-21 23:51:30,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9696 states and 14708 transitions. [2020-07-21 23:51:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:51:30,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:30,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:30,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:30,738 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:30,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1962923333, now seen corresponding path program 1 times [2020-07-21 23:51:30,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:30,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578738136] [2020-07-21 23:51:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:31,040 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:31,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:31,194 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 23:51:31,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:31,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578738136] [2020-07-21 23:51:31,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:31,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:31,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541019417] [2020-07-21 23:51:31,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:31,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:31,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:31,196 INFO L87 Difference]: Start difference. First operand 9696 states and 14708 transitions. Second operand 3 states. [2020-07-21 23:51:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:31,779 INFO L93 Difference]: Finished difference Result 20356 states and 31014 transitions. [2020-07-21 23:51:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:31,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 23:51:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:31,804 INFO L225 Difference]: With dead ends: 20356 [2020-07-21 23:51:31,805 INFO L226 Difference]: Without dead ends: 13686 [2020-07-21 23:51:31,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13686 states. [2020-07-21 23:51:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13686 to 12156. [2020-07-21 23:51:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12156 states. [2020-07-21 23:51:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 18602 transitions. [2020-07-21 23:51:32,701 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 18602 transitions. Word has length 338 [2020-07-21 23:51:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:32,701 INFO L479 AbstractCegarLoop]: Abstraction has 12156 states and 18602 transitions. [2020-07-21 23:51:32,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 18602 transitions. [2020-07-21 23:51:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:51:32,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:32,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:32,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:32,916 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1698293508, now seen corresponding path program 1 times [2020-07-21 23:51:32,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:32,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852961992] [2020-07-21 23:51:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:33,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:33,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:33,240 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 23:51:33,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:33,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852961992] [2020-07-21 23:51:33,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:33,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:33,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528769127] [2020-07-21 23:51:33,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:33,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:33,244 INFO L87 Difference]: Start difference. First operand 12156 states and 18602 transitions. Second operand 3 states. [2020-07-21 23:51:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:35,113 INFO L93 Difference]: Finished difference Result 34070 states and 51823 transitions. [2020-07-21 23:51:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:35,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 23:51:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:35,142 INFO L225 Difference]: With dead ends: 34070 [2020-07-21 23:51:35,143 INFO L226 Difference]: Without dead ends: 23046 [2020-07-21 23:51:35,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23046 states. [2020-07-21 23:51:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23046 to 12270. [2020-07-21 23:51:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12270 states. [2020-07-21 23:51:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12270 states to 12270 states and 18754 transitions. [2020-07-21 23:51:35,775 INFO L78 Accepts]: Start accepts. Automaton has 12270 states and 18754 transitions. Word has length 338 [2020-07-21 23:51:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:35,775 INFO L479 AbstractCegarLoop]: Abstraction has 12270 states and 18754 transitions. [2020-07-21 23:51:35,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 12270 states and 18754 transitions. [2020-07-21 23:51:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:51:35,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:35,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:35,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:35,986 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 568793008, now seen corresponding path program 1 times [2020-07-21 23:51:35,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:35,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381563496] [2020-07-21 23:51:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:36,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:36,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:36,373 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 23:51:36,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:36,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381563496] [2020-07-21 23:51:36,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:36,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:36,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275557540] [2020-07-21 23:51:36,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:36,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:36,376 INFO L87 Difference]: Start difference. First operand 12270 states and 18754 transitions. Second operand 3 states. [2020-07-21 23:51:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:37,222 INFO L93 Difference]: Finished difference Result 34366 states and 52214 transitions. [2020-07-21 23:51:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:37,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 23:51:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:37,256 INFO L225 Difference]: With dead ends: 34366 [2020-07-21 23:51:37,257 INFO L226 Difference]: Without dead ends: 23348 [2020-07-21 23:51:37,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23348 states. [2020-07-21 23:51:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23348 to 12424. [2020-07-21 23:51:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2020-07-21 23:51:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 18935 transitions. [2020-07-21 23:51:38,029 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 18935 transitions. Word has length 339 [2020-07-21 23:51:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:38,030 INFO L479 AbstractCegarLoop]: Abstraction has 12424 states and 18935 transitions. [2020-07-21 23:51:38,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 18935 transitions. [2020-07-21 23:51:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:51:38,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:38,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:38,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:38,248 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:38,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1714002818, now seen corresponding path program 1 times [2020-07-21 23:51:38,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:38,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291888968] [2020-07-21 23:51:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:38,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:38,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:38,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:38,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:38,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:38,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291888968] [2020-07-21 23:51:38,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:38,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:51:38,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436249077] [2020-07-21 23:51:38,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:51:38,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:51:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:38,638 INFO L87 Difference]: Start difference. First operand 12424 states and 18935 transitions. Second operand 5 states. [2020-07-21 23:51:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:39,540 INFO L93 Difference]: Finished difference Result 22046 states and 33624 transitions. [2020-07-21 23:51:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:51:39,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-21 23:51:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:39,553 INFO L225 Difference]: With dead ends: 22046 [2020-07-21 23:51:39,553 INFO L226 Difference]: Without dead ends: 12424 [2020-07-21 23:51:39,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:51:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2020-07-21 23:51:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 12424. [2020-07-21 23:51:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2020-07-21 23:51:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 18769 transitions. [2020-07-21 23:51:40,099 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 18769 transitions. Word has length 339 [2020-07-21 23:51:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:40,099 INFO L479 AbstractCegarLoop]: Abstraction has 12424 states and 18769 transitions. [2020-07-21 23:51:40,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:51:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 18769 transitions. [2020-07-21 23:51:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:51:40,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:40,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:40,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:40,308 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193853, now seen corresponding path program 1 times [2020-07-21 23:51:40,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:40,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970954808] [2020-07-21 23:51:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:40,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:40,693 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 23:51:40,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:40,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970954808] [2020-07-21 23:51:40,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:40,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:40,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505618698] [2020-07-21 23:51:40,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:40,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:40,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:40,695 INFO L87 Difference]: Start difference. First operand 12424 states and 18769 transitions. Second operand 4 states. [2020-07-21 23:51:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:41,901 INFO L93 Difference]: Finished difference Result 35981 states and 54291 transitions. [2020-07-21 23:51:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:41,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 23:51:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:41,924 INFO L225 Difference]: With dead ends: 35981 [2020-07-21 23:51:41,924 INFO L226 Difference]: Without dead ends: 23899 [2020-07-21 23:51:41,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 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 23:51:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23899 states. [2020-07-21 23:51:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23899 to 23897. [2020-07-21 23:51:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23897 states. [2020-07-21 23:51:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23897 states to 23897 states and 35921 transitions. [2020-07-21 23:51:43,716 INFO L78 Accepts]: Start accepts. Automaton has 23897 states and 35921 transitions. Word has length 339 [2020-07-21 23:51:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:43,717 INFO L479 AbstractCegarLoop]: Abstraction has 23897 states and 35921 transitions. [2020-07-21 23:51:43,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 23897 states and 35921 transitions. [2020-07-21 23:51:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 23:51:43,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:43,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:43,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:43,930 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1115207281, now seen corresponding path program 1 times [2020-07-21 23:51:43,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:43,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199068370] [2020-07-21 23:51:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:44,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:44,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:51:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:44,256 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 23:51:44,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:44,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199068370] [2020-07-21 23:51:44,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:44,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:44,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132739373] [2020-07-21 23:51:44,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:44,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:44,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:44,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:44,261 INFO L87 Difference]: Start difference. First operand 23897 states and 35921 transitions. Second operand 4 states. [2020-07-21 23:51:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:45,414 INFO L93 Difference]: Finished difference Result 43330 states and 64956 transitions. [2020-07-21 23:51:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:45,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 23:51:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:45,433 INFO L225 Difference]: With dead ends: 43330 [2020-07-21 23:51:45,434 INFO L226 Difference]: Without dead ends: 21361 [2020-07-21 23:51:45,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21361 states. [2020-07-21 23:51:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21361 to 21209. [2020-07-21 23:51:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21209 states. [2020-07-21 23:51:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21209 states to 21209 states and 31897 transitions. [2020-07-21 23:51:46,413 INFO L78 Accepts]: Start accepts. Automaton has 21209 states and 31897 transitions. Word has length 340 [2020-07-21 23:51:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:46,413 INFO L479 AbstractCegarLoop]: Abstraction has 21209 states and 31897 transitions. [2020-07-21 23:51:46,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21209 states and 31897 transitions. [2020-07-21 23:51:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 23:51:46,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:46,425 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] [2020-07-21 23:51:46,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:46,640 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1284341667, now seen corresponding path program 1 times [2020-07-21 23:51:46,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:46,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341536969] [2020-07-21 23:51:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:46,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:46,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:47,010 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 23:51:47,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:47,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341536969] [2020-07-21 23:51:47,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:47,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:47,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623489445] [2020-07-21 23:51:47,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:47,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:47,012 INFO L87 Difference]: Start difference. First operand 21209 states and 31897 transitions. Second operand 3 states. [2020-07-21 23:51:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:48,954 INFO L93 Difference]: Finished difference Result 60647 states and 90926 transitions. [2020-07-21 23:51:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:48,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 23:51:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:48,999 INFO L225 Difference]: With dead ends: 60647 [2020-07-21 23:51:48,999 INFO L226 Difference]: Without dead ends: 40987 [2020-07-21 23:51:49,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 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 23:51:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40987 states. [2020-07-21 23:51:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40987 to 40985. [2020-07-21 23:51:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40985 states. [2020-07-21 23:51:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40985 states to 40985 states and 61292 transitions. [2020-07-21 23:51:52,177 INFO L78 Accepts]: Start accepts. Automaton has 40985 states and 61292 transitions. Word has length 341 [2020-07-21 23:51:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:52,178 INFO L479 AbstractCegarLoop]: Abstraction has 40985 states and 61292 transitions. [2020-07-21 23:51:52,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 40985 states and 61292 transitions. [2020-07-21 23:51:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:51:52,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:52,202 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 23:51:52,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:52,416 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash -582489977, now seen corresponding path program 1 times [2020-07-21 23:51:52,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:52,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039312037] [2020-07-21 23:51:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:52,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:52,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:51:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:52,889 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 23:51:52,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:52,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039312037] [2020-07-21 23:51:52,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:52,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:51:52,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564193686] [2020-07-21 23:51:52,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:51:52,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:51:52,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:51:52,892 INFO L87 Difference]: Start difference. First operand 40985 states and 61292 transitions. Second operand 8 states. [2020-07-21 23:51:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:58,626 INFO L93 Difference]: Finished difference Result 100361 states and 151936 transitions. [2020-07-21 23:51:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:51:58,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-07-21 23:51:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:58,709 INFO L225 Difference]: With dead ends: 100361 [2020-07-21 23:51:58,709 INFO L226 Difference]: Without dead ends: 83407 [2020-07-21 23:51:58,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 23:51:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83407 states. [2020-07-21 23:52:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83407 to 48017. [2020-07-21 23:52:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48017 states. [2020-07-21 23:52:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48017 states to 48017 states and 71820 transitions. [2020-07-21 23:52:01,646 INFO L78 Accepts]: Start accepts. Automaton has 48017 states and 71820 transitions. Word has length 342 [2020-07-21 23:52:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:01,646 INFO L479 AbstractCegarLoop]: Abstraction has 48017 states and 71820 transitions. [2020-07-21 23:52:01,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:52:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 48017 states and 71820 transitions. [2020-07-21 23:52:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:52:01,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:01,677 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 23:52:01,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:01,890 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:01,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:01,890 INFO L82 PathProgramCache]: Analyzing trace with hash -750406235, now seen corresponding path program 1 times [2020-07-21 23:52:01,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:01,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933117258] [2020-07-21 23:52:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:02,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:02,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:02,230 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 23:52:02,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:02,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933117258] [2020-07-21 23:52:02,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:02,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:02,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347785055] [2020-07-21 23:52:02,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:02,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:02,233 INFO L87 Difference]: Start difference. First operand 48017 states and 71820 transitions. Second operand 3 states. [2020-07-21 23:52:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:06,743 INFO L93 Difference]: Finished difference Result 105977 states and 159998 transitions. [2020-07-21 23:52:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:06,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 23:52:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:06,814 INFO L225 Difference]: With dead ends: 105977 [2020-07-21 23:52:06,814 INFO L226 Difference]: Without dead ends: 67615 [2020-07-21 23:52:06,849 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 23:52:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67615 states. [2020-07-21 23:52:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67615 to 62469. [2020-07-21 23:52:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62469 states. [2020-07-21 23:52:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62469 states to 62469 states and 94176 transitions. [2020-07-21 23:52:10,692 INFO L78 Accepts]: Start accepts. Automaton has 62469 states and 94176 transitions. Word has length 342 [2020-07-21 23:52:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:10,692 INFO L479 AbstractCegarLoop]: Abstraction has 62469 states and 94176 transitions. [2020-07-21 23:52:10,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 62469 states and 94176 transitions. [2020-07-21 23:52:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:52:10,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:10,710 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] [2020-07-21 23:52:10,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:10,911 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash 199127432, now seen corresponding path program 1 times [2020-07-21 23:52:10,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:10,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332659301] [2020-07-21 23:52:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:11,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:11,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:11,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:11,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332659301] [2020-07-21 23:52:11,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:11,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:11,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473645698] [2020-07-21 23:52:11,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:11,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:11,223 INFO L87 Difference]: Start difference. First operand 62469 states and 94176 transitions. Second operand 4 states. [2020-07-21 23:52:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:16,224 INFO L93 Difference]: Finished difference Result 130525 states and 196348 transitions. [2020-07-21 23:52:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:16,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-21 23:52:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:16,292 INFO L225 Difference]: With dead ends: 130525 [2020-07-21 23:52:16,292 INFO L226 Difference]: Without dead ends: 65853 [2020-07-21 23:52:16,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 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 23:52:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65853 states. [2020-07-21 23:52:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65853 to 65851. [2020-07-21 23:52:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65851 states. [2020-07-21 23:52:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65851 states to 65851 states and 98622 transitions. [2020-07-21 23:52:20,388 INFO L78 Accepts]: Start accepts. Automaton has 65851 states and 98622 transitions. Word has length 343 [2020-07-21 23:52:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:20,388 INFO L479 AbstractCegarLoop]: Abstraction has 65851 states and 98622 transitions. [2020-07-21 23:52:20,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 65851 states and 98622 transitions. [2020-07-21 23:52:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 23:52:20,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:20,412 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] [2020-07-21 23:52:20,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:20,613 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash 744777186, now seen corresponding path program 1 times [2020-07-21 23:52:20,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:20,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251837979] [2020-07-21 23:52:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:20,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:21,015 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 23:52:21,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:21,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251837979] [2020-07-21 23:52:21,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:21,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:52:21,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882349912] [2020-07-21 23:52:21,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:52:21,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:21,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:52:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:52:21,017 INFO L87 Difference]: Start difference. First operand 65851 states and 98622 transitions. Second operand 5 states. [2020-07-21 23:52:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:26,444 INFO L93 Difference]: Finished difference Result 118721 states and 178553 transitions. [2020-07-21 23:52:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:52:26,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 345 [2020-07-21 23:52:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:26,512 INFO L225 Difference]: With dead ends: 118721 [2020-07-21 23:52:26,512 INFO L226 Difference]: Without dead ends: 65851 [2020-07-21 23:52:26,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:52:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65851 states. [2020-07-21 23:52:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65851 to 65851. [2020-07-21 23:52:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65851 states. [2020-07-21 23:52:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65851 states to 65851 states and 97830 transitions. [2020-07-21 23:52:30,640 INFO L78 Accepts]: Start accepts. Automaton has 65851 states and 97830 transitions. Word has length 345 [2020-07-21 23:52:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:30,640 INFO L479 AbstractCegarLoop]: Abstraction has 65851 states and 97830 transitions. [2020-07-21 23:52:30,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:52:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 65851 states and 97830 transitions. [2020-07-21 23:52:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 23:52:30,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:30,664 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] [2020-07-21 23:52:30,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:30,865 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:30,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1123136925, now seen corresponding path program 1 times [2020-07-21 23:52:30,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:30,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801846097] [2020-07-21 23:52:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:31,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:31,228 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 23:52:31,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:31,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801846097] [2020-07-21 23:52:31,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:31,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:31,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962005826] [2020-07-21 23:52:31,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:31,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:31,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:31,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:31,230 INFO L87 Difference]: Start difference. First operand 65851 states and 97830 transitions. Second operand 3 states. [2020-07-21 23:52:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:40,305 INFO L93 Difference]: Finished difference Result 190835 states and 283357 transitions. [2020-07-21 23:52:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:40,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-07-21 23:52:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:40,440 INFO L225 Difference]: With dead ends: 190835 [2020-07-21 23:52:40,440 INFO L226 Difference]: Without dead ends: 128218 [2020-07-21 23:52:40,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 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 23:52:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128218 states. [2020-07-21 23:52:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128218 to 128216. [2020-07-21 23:52:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128216 states. [2020-07-21 23:52:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128216 states to 128216 states and 189759 transitions. [2020-07-21 23:52:49,077 INFO L78 Accepts]: Start accepts. Automaton has 128216 states and 189759 transitions. Word has length 345 [2020-07-21 23:52:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:49,077 INFO L479 AbstractCegarLoop]: Abstraction has 128216 states and 189759 transitions. [2020-07-21 23:52:49,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 128216 states and 189759 transitions. [2020-07-21 23:52:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 23:52:49,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:49,138 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] [2020-07-21 23:52:49,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:49,352 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:49,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1726862816, now seen corresponding path program 1 times [2020-07-21 23:52:49,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:49,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031097897] [2020-07-21 23:52:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:49,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:49,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:52:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:49,665 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 23:52:49,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:49,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031097897] [2020-07-21 23:52:49,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:49,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:49,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598190571] [2020-07-21 23:52:49,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:49,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:49,667 INFO L87 Difference]: Start difference. First operand 128216 states and 189759 transitions. Second operand 4 states. [2020-07-21 23:53:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:04,265 INFO L93 Difference]: Finished difference Result 312790 states and 461533 transitions. [2020-07-21 23:53:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:04,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-07-21 23:53:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:04,490 INFO L225 Difference]: With dead ends: 312790 [2020-07-21 23:53:04,490 INFO L226 Difference]: Without dead ends: 200622 [2020-07-21 23:53:04,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 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 23:53:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200622 states. [2020-07-21 23:53:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200622 to 125789. [2020-07-21 23:53:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125789 states. [2020-07-21 23:53:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125789 states to 125789 states and 186024 transitions. [2020-07-21 23:53:17,544 INFO L78 Accepts]: Start accepts. Automaton has 125789 states and 186024 transitions. Word has length 345 [2020-07-21 23:53:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:17,544 INFO L479 AbstractCegarLoop]: Abstraction has 125789 states and 186024 transitions. [2020-07-21 23:53:17,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 125789 states and 186024 transitions. [2020-07-21 23:53:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 23:53:17,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:17,586 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] [2020-07-21 23:53:17,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:17,787 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1443930571, now seen corresponding path program 1 times [2020-07-21 23:53:17,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:17,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433465889] [2020-07-21 23:53:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:18,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:18,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:18,143 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 23:53:18,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:18,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433465889] [2020-07-21 23:53:18,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:18,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:18,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354963808] [2020-07-21 23:53:18,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:18,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:18,145 INFO L87 Difference]: Start difference. First operand 125789 states and 186024 transitions. Second operand 3 states. [2020-07-21 23:53:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:36,042 INFO L93 Difference]: Finished difference Result 310699 states and 464821 transitions. [2020-07-21 23:53:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:36,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-21 23:53:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:36,287 INFO L225 Difference]: With dead ends: 310699 [2020-07-21 23:53:36,287 INFO L226 Difference]: Without dead ends: 207057 [2020-07-21 23:53:36,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 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 23:53:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207057 states. [2020-07-21 23:53:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207057 to 184179. [2020-07-21 23:53:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184179 states. [2020-07-21 23:53:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184179 states to 184179 states and 277793 transitions. [2020-07-21 23:53:50,750 INFO L78 Accepts]: Start accepts. Automaton has 184179 states and 277793 transitions. Word has length 347 [2020-07-21 23:53:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:50,750 INFO L479 AbstractCegarLoop]: Abstraction has 184179 states and 277793 transitions. [2020-07-21 23:53:50,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 184179 states and 277793 transitions. [2020-07-21 23:53:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 23:53:50,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:50,795 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] [2020-07-21 23:53:50,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:50,996 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash 99033064, now seen corresponding path program 1 times [2020-07-21 23:53:50,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:50,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682764702] [2020-07-21 23:53:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:51,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:51,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:51,280 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 23:53:51,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:51,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682764702] [2020-07-21 23:53:51,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:51,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:51,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880767323] [2020-07-21 23:53:51,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:51,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:51,282 INFO L87 Difference]: Start difference. First operand 184179 states and 277793 transitions. Second operand 3 states. [2020-07-21 23:54:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:18,539 INFO L93 Difference]: Finished difference Result 499765 states and 753272 transitions. [2020-07-21 23:54:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:18,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-07-21 23:54:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:19,003 INFO L225 Difference]: With dead ends: 499765 [2020-07-21 23:54:19,003 INFO L226 Difference]: Without dead ends: 326755 [2020-07-21 23:54:19,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 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 23:54:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326755 states. [2020-07-21 23:54:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326755 to 184674. [2020-07-21 23:54:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184674 states. [2020-07-21 23:54:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184674 states to 184674 states and 278323 transitions. [2020-07-21 23:54:38,833 INFO L78 Accepts]: Start accepts. Automaton has 184674 states and 278323 transitions. Word has length 348 [2020-07-21 23:54:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:38,834 INFO L479 AbstractCegarLoop]: Abstraction has 184674 states and 278323 transitions. [2020-07-21 23:54:38,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 184674 states and 278323 transitions. [2020-07-21 23:54:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 23:54:38,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:38,880 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] [2020-07-21 23:54:39,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:39,081 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash -648243640, now seen corresponding path program 1 times [2020-07-21 23:54:39,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:39,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931083334] [2020-07-21 23:54:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:39,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:39,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:54:39,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:39,468 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 23:54:39,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:39,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931083334] [2020-07-21 23:54:39,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:39,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:54:39,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432517206] [2020-07-21 23:54:39,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:54:39,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:54:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:54:39,470 INFO L87 Difference]: Start difference. First operand 184674 states and 278323 transitions. Second operand 4 states. [2020-07-21 23:55:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:11,327 INFO L93 Difference]: Finished difference Result 530212 states and 799718 transitions. [2020-07-21 23:55:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:55:11,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 348 [2020-07-21 23:55:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:11,770 INFO L225 Difference]: With dead ends: 530212 [2020-07-21 23:55:11,770 INFO L226 Difference]: Without dead ends: 345787 [2020-07-21 23:55:11,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 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 23:55:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345787 states. [2020-07-21 23:55:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345787 to 345785. [2020-07-21 23:55:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345785 states. [2020-07-21 23:55:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345785 states to 345785 states and 518748 transitions. [2020-07-21 23:55:47,306 INFO L78 Accepts]: Start accepts. Automaton has 345785 states and 518748 transitions. Word has length 348 [2020-07-21 23:55:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:47,306 INFO L479 AbstractCegarLoop]: Abstraction has 345785 states and 518748 transitions. [2020-07-21 23:55:47,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:55:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 345785 states and 518748 transitions. [2020-07-21 23:55:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-21 23:55:47,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:47,399 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] [2020-07-21 23:55:47,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:47,600 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1344556059, now seen corresponding path program 1 times [2020-07-21 23:55:47,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:47,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678857324] [2020-07-21 23:55:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:47,875 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:55:47,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:55:47,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:47,967 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 23:55:47,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:47,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678857324] [2020-07-21 23:55:47,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:47,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:55:47,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583120799] [2020-07-21 23:55:47,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:55:47,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:55:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:55:47,968 INFO L87 Difference]: Start difference. First operand 345785 states and 518748 transitions. Second operand 3 states. [2020-07-21 23:56:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:55,505 INFO L93 Difference]: Finished difference Result 1014187 states and 1521881 transitions. [2020-07-21 23:56:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:55,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-07-21 23:56:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:56,488 INFO L225 Difference]: With dead ends: 1014187 [2020-07-21 23:56:56,488 INFO L226 Difference]: Without dead ends: 678150 [2020-07-21 23:56:56,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 348 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 23:56:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678150 states. [2020-07-21 23:58:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678150 to 677888. [2020-07-21 23:58:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677888 states. [2020-07-21 23:58:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677888 states to 677888 states and 1012966 transitions. [2020-07-21 23:58:13,014 INFO L78 Accepts]: Start accepts. Automaton has 677888 states and 1012966 transitions. Word has length 350 [2020-07-21 23:58:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:58:13,014 INFO L479 AbstractCegarLoop]: Abstraction has 677888 states and 1012966 transitions. [2020-07-21 23:58:13,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:58:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 677888 states and 1012966 transitions. [2020-07-21 23:58:13,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 23:58:13,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:58:13,185 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] [2020-07-21 23:58:13,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:13,392 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:58:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:58:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 855420753, now seen corresponding path program 1 times [2020-07-21 23:58:13,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:58:13,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141282935] [2020-07-21 23:58:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:13,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:58:13,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:58:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:58:13,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:58:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:58:13,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:58:13,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141282935] [2020-07-21 23:58:13,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:58:13,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:58:13,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186956004] [2020-07-21 23:58:13,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:58:13,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:58:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:58:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:58:13,696 INFO L87 Difference]: Start difference. First operand 677888 states and 1012966 transitions. Second operand 4 states. [2020-07-22 00:00:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:15,394 INFO L93 Difference]: Finished difference Result 1788793 states and 2670017 transitions. [2020-07-22 00:00:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:00:15,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-07-22 00:00:15,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:17,081 INFO L225 Difference]: With dead ends: 1788793 [2020-07-22 00:00:17,082 INFO L226 Difference]: Without dead ends: 1132175 [2020-07-22 00:00:17,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-22 00:00:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132175 states. [2020-07-22 00:01:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132175 to 650413. [2020-07-22 00:01:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650413 states. [2020-07-22 00:01:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650413 states to 650413 states and 971818 transitions. [2020-07-22 00:01:38,047 INFO L78 Accepts]: Start accepts. Automaton has 650413 states and 971818 transitions. Word has length 351 [2020-07-22 00:01:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:01:38,047 INFO L479 AbstractCegarLoop]: Abstraction has 650413 states and 971818 transitions. [2020-07-22 00:01:38,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:01:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 650413 states and 971818 transitions. [2020-07-22 00:01:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-07-22 00:01:38,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:01:38,193 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] [2020-07-22 00:01:38,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:01:38,394 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:01:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:01:38,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2131061472, now seen corresponding path program 1 times [2020-07-22 00:01:38,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:01:38,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215916341] [2020-07-22 00:01:38,396 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 00:01:38,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-22 00:01:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:01:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-22 00:01:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:01:38,702 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 00:01:38,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:01:38,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215916341] [2020-07-22 00:01:38,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:01:38,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:01:38,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555166156] [2020-07-22 00:01:38,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:01:38,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:01:38,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:01:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:01:38,703 INFO L87 Difference]: Start difference. First operand 650413 states and 971818 transitions. Second operand 4 states. [2020-07-22 00:02:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:51,695 INFO L93 Difference]: Finished difference Result 1347756 states and 2007687 transitions. [2020-07-22 00:02:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:02:51,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 352 [2020-07-22 00:02:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:52,680 INFO L225 Difference]: With dead ends: 1347756 [2020-07-22 00:02:52,680 INFO L226 Difference]: Without dead ends: 675648 [2020-07-22 00:02:53,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-22 00:02:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675648 states.