/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_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:48:07,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:48:07,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:48:07,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:48:07,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:48:07,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:48:07,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:48:07,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:48:07,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:48:07,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:48:07,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:48:07,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:48:07,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:48:07,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:48:07,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:48:07,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:48:07,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:48:07,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:48:07,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:48:07,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:48:07,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:48:07,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:48:07,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:48:07,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:48:07,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:48:07,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:48:07,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:48:07,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:48:07,840 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 23:48:07,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:48:07,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:48:07,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:48:07,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:48:07,857 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:48:07,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:48:07,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:48:07,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:48:07,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:48:07,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:48:07,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:48:07,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:48:07,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:48:07,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:48:07,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:48:07,859 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:48:07,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:48:07,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:48:07,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:48:07,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:48:07,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:48:07,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:48:07,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:48:07,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:48:07,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:48:07,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:48:07,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:07,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:48:07,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:48:07,862 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 23:48:08,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:48:08,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:48:08,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:48:08,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:48:08,237 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:48:08,238 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 23:48:08,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74cb93de8/9710c8d292ba4c8da192eab819177eef/FLAGec5f06150 [2020-07-21 23:48:09,116 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:48:09,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 23:48:09,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74cb93de8/9710c8d292ba4c8da192eab819177eef/FLAGec5f06150 [2020-07-21 23:48:09,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74cb93de8/9710c8d292ba4c8da192eab819177eef [2020-07-21 23:48:09,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:48:09,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:48:09,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:48:09,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:48:09,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:48:09,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:48:09" (1/1) ... [2020-07-21 23:48:09,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:09, skipping insertion in model container [2020-07-21 23:48:09,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:48:09" (1/1) ... [2020-07-21 23:48:09,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:48:09,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:48:12,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:48:12,228 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:48:13,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:48:13,737 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:48:13,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13 WrapperNode [2020-07-21 23:48:13,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:48:13,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:48:13,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:48:13,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:48:13,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:13,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:13,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:13,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:13,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:13,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:14,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (1/1) ... [2020-07-21 23:48:14,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:48:14,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:48:14,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:48:14,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:48:14,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (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 23:48:14,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:48:14,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:48:14,118 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:48:14,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:48:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:48:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:48:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:48:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:48:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:48:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:48:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:48:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:48:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:48:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:48:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:48:14,120 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:48:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 23:48:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:48:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:48:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:48:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:48:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:48:19,747 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:48:19,748 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:48:19,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:48:19 BoogieIcfgContainer [2020-07-21 23:48:19,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:48:19,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:48:19,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:48:19,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:48:19,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:48:09" (1/3) ... [2020-07-21 23:48:19,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120e2420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:48:19, skipping insertion in model container [2020-07-21 23:48:19,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:13" (2/3) ... [2020-07-21 23:48:19,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120e2420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:48:19, skipping insertion in model container [2020-07-21 23:48:19,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:48:19" (3/3) ... [2020-07-21 23:48:19,782 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 23:48:19,794 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:48:19,809 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 23:48:19,823 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 23:48:19,867 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:48:19,867 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:48:19,867 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:48:19,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:48:19,868 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:48:19,868 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:48:19,868 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:48:19,868 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:48:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-21 23:48:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-21 23:48:19,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:19,978 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] [2020-07-21 23:48:19,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:19,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-21 23:48:19,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:19,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929662005] [2020-07-21 23:48:19,996 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 23:48:20,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:48:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:20,810 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 23:48:20,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:20,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929662005] [2020-07-21 23:48:20,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:20,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:20,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303612693] [2020-07-21 23:48:20,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:20,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:20,841 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 4 states. [2020-07-21 23:48:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:21,231 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-07-21 23:48:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:48:21,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2020-07-21 23:48:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:21,265 INFO L225 Difference]: With dead ends: 3956 [2020-07-21 23:48:21,266 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 23:48:21,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 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 23:48:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 23:48:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 23:48:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 23:48:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-07-21 23:48:21,500 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-07-21 23:48:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:21,501 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-07-21 23:48:21,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-07-21 23:48:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-21 23:48:21,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:21,512 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] [2020-07-21 23:48:21,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:21,726 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-07-21 23:48:21,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:21,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973122133] [2020-07-21 23:48:21,728 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 23:48:22,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:22,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2292 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:22,363 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 23:48:22,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:22,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973122133] [2020-07-21 23:48:22,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:22,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:22,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993317090] [2020-07-21 23:48:22,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:22,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:22,368 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 3 states. [2020-07-21 23:48:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:22,860 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-07-21 23:48:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:22,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2020-07-21 23:48:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:22,885 INFO L225 Difference]: With dead ends: 5464 [2020-07-21 23:48:22,886 INFO L226 Difference]: Without dead ends: 3801 [2020-07-21 23:48:22,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 347 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 23:48:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-07-21 23:48:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-07-21 23:48:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-07-21 23:48:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-07-21 23:48:23,036 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-07-21 23:48:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:23,043 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-07-21 23:48:23,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-07-21 23:48:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-07-21 23:48:23,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:23,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:23,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:23,275 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-07-21 23:48:23,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:23,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346438139] [2020-07-21 23:48:23,276 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 23:48:23,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:23,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:23,864 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 23:48:23,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:23,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346438139] [2020-07-21 23:48:23,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:23,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:23,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544547635] [2020-07-21 23:48:23,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:23,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:23,868 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 3 states. [2020-07-21 23:48:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:24,221 INFO L93 Difference]: Finished difference Result 9915 states and 16774 transitions. [2020-07-21 23:48:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:24,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 353 [2020-07-21 23:48:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:24,259 INFO L225 Difference]: With dead ends: 9915 [2020-07-21 23:48:24,259 INFO L226 Difference]: Without dead ends: 6767 [2020-07-21 23:48:24,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 351 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 23:48:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2020-07-21 23:48:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 6763. [2020-07-21 23:48:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6763 states. [2020-07-21 23:48:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 11430 transitions. [2020-07-21 23:48:24,616 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 11430 transitions. Word has length 353 [2020-07-21 23:48:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:24,617 INFO L479 AbstractCegarLoop]: Abstraction has 6763 states and 11430 transitions. [2020-07-21 23:48:24,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 11430 transitions. [2020-07-21 23:48:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-07-21 23:48:24,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:24,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:24,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:24,854 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:24,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1865003386, now seen corresponding path program 1 times [2020-07-21 23:48:24,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:24,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179153217] [2020-07-21 23:48:24,855 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 23:48:25,302 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:25,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:25,410 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 23:48:25,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:25,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179153217] [2020-07-21 23:48:25,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:25,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:25,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313768545] [2020-07-21 23:48:25,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:25,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:25,414 INFO L87 Difference]: Start difference. First operand 6763 states and 11430 transitions. Second operand 3 states. [2020-07-21 23:48:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:25,777 INFO L93 Difference]: Finished difference Result 18367 states and 30878 transitions. [2020-07-21 23:48:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:25,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 357 [2020-07-21 23:48:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:25,839 INFO L225 Difference]: With dead ends: 18367 [2020-07-21 23:48:25,840 INFO L226 Difference]: Without dead ends: 12387 [2020-07-21 23:48:25,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 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 23:48:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12387 states. [2020-07-21 23:48:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12387 to 12383. [2020-07-21 23:48:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12383 states. [2020-07-21 23:48:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 20778 transitions. [2020-07-21 23:48:26,262 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 20778 transitions. Word has length 357 [2020-07-21 23:48:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:26,263 INFO L479 AbstractCegarLoop]: Abstraction has 12383 states and 20778 transitions. [2020-07-21 23:48:26,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 20778 transitions. [2020-07-21 23:48:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-07-21 23:48:26,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:26,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:26,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:26,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 358005276, now seen corresponding path program 1 times [2020-07-21 23:48:26,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:26,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122306339] [2020-07-21 23:48:26,508 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 23:48:26,965 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:27,054 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 23:48:27,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:27,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122306339] [2020-07-21 23:48:27,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:27,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:27,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482774132] [2020-07-21 23:48:27,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:27,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:27,057 INFO L87 Difference]: Start difference. First operand 12383 states and 20778 transitions. Second operand 3 states. [2020-07-21 23:48:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:27,713 INFO L93 Difference]: Finished difference Result 34335 states and 57334 transitions. [2020-07-21 23:48:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:27,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-07-21 23:48:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:27,767 INFO L225 Difference]: With dead ends: 34335 [2020-07-21 23:48:27,767 INFO L226 Difference]: Without dead ends: 23003 [2020-07-21 23:48:27,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 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 23:48:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23003 states. [2020-07-21 23:48:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23003 to 22999. [2020-07-21 23:48:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22999 states. [2020-07-21 23:48:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22999 states to 22999 states and 38306 transitions. [2020-07-21 23:48:28,347 INFO L78 Accepts]: Start accepts. Automaton has 22999 states and 38306 transitions. Word has length 361 [2020-07-21 23:48:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:28,348 INFO L479 AbstractCegarLoop]: Abstraction has 22999 states and 38306 transitions. [2020-07-21 23:48:28,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22999 states and 38306 transitions. [2020-07-21 23:48:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-07-21 23:48:28,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:28,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:28,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:28,604 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:28,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2100513250, now seen corresponding path program 1 times [2020-07-21 23:48:28,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:28,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731301572] [2020-07-21 23:48:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:29,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:30,032 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 23:48:30,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:30,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731301572] [2020-07-21 23:48:30,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:30,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:30,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974857270] [2020-07-21 23:48:30,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:30,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:30,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:30,042 INFO L87 Difference]: Start difference. First operand 22999 states and 38306 transitions. Second operand 3 states. [2020-07-21 23:48:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:30,729 INFO L93 Difference]: Finished difference Result 64399 states and 106742 transitions. [2020-07-21 23:48:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:30,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2020-07-21 23:48:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:30,836 INFO L225 Difference]: With dead ends: 64399 [2020-07-21 23:48:30,836 INFO L226 Difference]: Without dead ends: 42987 [2020-07-21 23:48:30,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 363 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 23:48:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42987 states. [2020-07-21 23:48:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42987 to 42983. [2020-07-21 23:48:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42983 states. [2020-07-21 23:48:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42983 states to 42983 states and 71026 transitions. [2020-07-21 23:48:31,983 INFO L78 Accepts]: Start accepts. Automaton has 42983 states and 71026 transitions. Word has length 365 [2020-07-21 23:48:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:31,984 INFO L479 AbstractCegarLoop]: Abstraction has 42983 states and 71026 transitions. [2020-07-21 23:48:31,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 42983 states and 71026 transitions. [2020-07-21 23:48:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-07-21 23:48:32,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:32,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:32,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:32,294 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash -217176652, now seen corresponding path program 1 times [2020-07-21 23:48:32,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:32,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678936858] [2020-07-21 23:48:32,297 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 23:48:32,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 2329 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:48:32,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:33,097 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 23:48:33,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:33,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678936858] [2020-07-21 23:48:33,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:33,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:48:33,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161830481] [2020-07-21 23:48:33,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:48:33,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:33,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:48:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:48:33,100 INFO L87 Difference]: Start difference. First operand 42983 states and 71026 transitions. Second operand 7 states. [2020-07-21 23:48:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:38,400 INFO L93 Difference]: Finished difference Result 192800 states and 319814 transitions. [2020-07-21 23:48:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:48:38,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 369 [2020-07-21 23:48:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:38,721 INFO L225 Difference]: With dead ends: 192800 [2020-07-21 23:48:38,721 INFO L226 Difference]: Without dead ends: 151804 [2020-07-21 23:48:38,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:48:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151804 states. [2020-07-21 23:48:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151804 to 84184. [2020-07-21 23:48:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84184 states. [2020-07-21 23:48:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84184 states to 84184 states and 138711 transitions. [2020-07-21 23:48:43,443 INFO L78 Accepts]: Start accepts. Automaton has 84184 states and 138711 transitions. Word has length 369 [2020-07-21 23:48:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:43,443 INFO L479 AbstractCegarLoop]: Abstraction has 84184 states and 138711 transitions. [2020-07-21 23:48:43,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:48:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 84184 states and 138711 transitions. [2020-07-21 23:48:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 23:48:43,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:43,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:43,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:43,720 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1141436285, now seen corresponding path program 1 times [2020-07-21 23:48:43,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:43,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37980115] [2020-07-21 23:48:43,723 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 23:48:44,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:44,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:48:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:44,349 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 23:48:44,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:44,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37980115] [2020-07-21 23:48:44,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:44,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:48:44,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782063030] [2020-07-21 23:48:44,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:48:44,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:48:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:48:44,352 INFO L87 Difference]: Start difference. First operand 84184 states and 138711 transitions. Second operand 7 states. [2020-07-21 23:48:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:50,202 INFO L93 Difference]: Finished difference Result 173104 states and 287430 transitions. [2020-07-21 23:48:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:48:50,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 23:48:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:50,387 INFO L225 Difference]: With dead ends: 173104 [2020-07-21 23:48:50,387 INFO L226 Difference]: Without dead ends: 151804 [2020-07-21 23:48:50,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:48:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151804 states. [2020-07-21 23:48:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151804 to 104928. [2020-07-21 23:48:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104928 states. [2020-07-21 23:48:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104928 states to 104928 states and 173420 transitions. [2020-07-21 23:48:53,645 INFO L78 Accepts]: Start accepts. Automaton has 104928 states and 173420 transitions. Word has length 370 [2020-07-21 23:48:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:53,646 INFO L479 AbstractCegarLoop]: Abstraction has 104928 states and 173420 transitions. [2020-07-21 23:48:53,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:48:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 104928 states and 173420 transitions. [2020-07-21 23:48:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 23:48:53,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:53,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:53,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:53,925 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1164348227, now seen corresponding path program 1 times [2020-07-21 23:48:53,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:53,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522471732] [2020-07-21 23:48:53,927 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 23:48:54,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:48:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:54,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:48:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:54,556 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 23:48:54,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522471732] [2020-07-21 23:48:54,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:54,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:48:54,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831897611] [2020-07-21 23:48:54,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:48:54,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:48:54,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:48:54,559 INFO L87 Difference]: Start difference. First operand 104928 states and 173420 transitions. Second operand 7 states. [2020-07-21 23:49:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:01,580 INFO L93 Difference]: Finished difference Result 193720 states and 321627 transitions. [2020-07-21 23:49:01,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:49:01,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 23:49:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:01,792 INFO L225 Difference]: With dead ends: 193720 [2020-07-21 23:49:01,793 INFO L226 Difference]: Without dead ends: 172548 [2020-07-21 23:49:01,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172548 states. [2020-07-21 23:49:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172548 to 125513. [2020-07-21 23:49:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125513 states. [2020-07-21 23:49:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125513 states to 125513 states and 207569 transitions. [2020-07-21 23:49:05,897 INFO L78 Accepts]: Start accepts. Automaton has 125513 states and 207569 transitions. Word has length 370 [2020-07-21 23:49:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:05,898 INFO L479 AbstractCegarLoop]: Abstraction has 125513 states and 207569 transitions. [2020-07-21 23:49:05,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:49:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 125513 states and 207569 transitions. [2020-07-21 23:49:05,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 23:49:05,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:05,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:06,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:06,176 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash -870147335, now seen corresponding path program 1 times [2020-07-21 23:49:06,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:06,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541434194] [2020-07-21 23:49:06,178 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 23:49:06,643 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:49:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:49:06,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:06,841 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 23:49:06,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:06,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541434194] [2020-07-21 23:49:06,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:06,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:49:06,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136165111] [2020-07-21 23:49:06,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:49:06,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:49:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:06,845 INFO L87 Difference]: Start difference. First operand 125513 states and 207569 transitions. Second operand 7 states. [2020-07-21 23:49:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:16,205 INFO L93 Difference]: Finished difference Result 210260 states and 349087 transitions. [2020-07-21 23:49:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:49:16,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 23:49:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:16,407 INFO L225 Difference]: With dead ends: 210260 [2020-07-21 23:49:16,407 INFO L226 Difference]: Without dead ends: 189088 [2020-07-21 23:49:16,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189088 states. [2020-07-21 23:49:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189088 to 145999. [2020-07-21 23:49:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145999 states. [2020-07-21 23:49:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145999 states to 145999 states and 241550 transitions. [2020-07-21 23:49:20,982 INFO L78 Accepts]: Start accepts. Automaton has 145999 states and 241550 transitions. Word has length 370 [2020-07-21 23:49:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:20,983 INFO L479 AbstractCegarLoop]: Abstraction has 145999 states and 241550 transitions. [2020-07-21 23:49:20,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:49:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 145999 states and 241550 transitions. [2020-07-21 23:49:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 23:49:21,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:21,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:21,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:21,280 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -116828669, now seen corresponding path program 1 times [2020-07-21 23:49:21,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:21,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394295588] [2020-07-21 23:49:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:49:21,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:49:21,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:49:21,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:21,905 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 23:49:21,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:21,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394295588] [2020-07-21 23:49:21,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:21,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:49:21,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927147116] [2020-07-21 23:49:21,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:49:21,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:49:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:21,907 INFO L87 Difference]: Start difference. First operand 145999 states and 241550 transitions. Second operand 7 states. [2020-07-21 23:49:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:31,695 INFO L93 Difference]: Finished difference Result 221312 states and 367429 transitions. [2020-07-21 23:49:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:49:31,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 23:49:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:31,888 INFO L225 Difference]: With dead ends: 221312 [2020-07-21 23:49:31,888 INFO L226 Difference]: Without dead ends: 200140 [2020-07-21 23:49:31,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200140 states. [2020-07-21 23:49:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200140 to 166254. [2020-07-21 23:49:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166254 states. [2020-07-21 23:49:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166254 states to 166254 states and 275139 transitions. [2020-07-21 23:49:37,253 INFO L78 Accepts]: Start accepts. Automaton has 166254 states and 275139 transitions. Word has length 370 [2020-07-21 23:49:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:37,253 INFO L479 AbstractCegarLoop]: Abstraction has 166254 states and 275139 transitions. [2020-07-21 23:49:37,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:49:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 166254 states and 275139 transitions. [2020-07-21 23:49:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 23:49:37,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:37,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:37,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:37,558 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1040596409, now seen corresponding path program 1 times [2020-07-21 23:49:37,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:37,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709636837] [2020-07-21 23:49:37,560 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 23:49:38,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:49:38,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:49:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:38,652 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 23:49:38,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:38,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709636837] [2020-07-21 23:49:38,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:38,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:49:38,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113999361] [2020-07-21 23:49:38,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:49:38,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:49:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:38,654 INFO L87 Difference]: Start difference. First operand 166254 states and 275139 transitions. Second operand 7 states. [2020-07-21 23:49:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:46,341 INFO L93 Difference]: Finished difference Result 240576 states and 399385 transitions. [2020-07-21 23:49:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:49:46,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 23:49:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:46,582 INFO L225 Difference]: With dead ends: 240576 [2020-07-21 23:49:46,582 INFO L226 Difference]: Without dead ends: 219404 [2020-07-21 23:49:46,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:49:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219404 states. [2020-07-21 23:49:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219404 to 186872. [2020-07-21 23:49:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186872 states. [2020-07-21 23:49:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186872 states to 186872 states and 309344 transitions. [2020-07-21 23:49:56,647 INFO L78 Accepts]: Start accepts. Automaton has 186872 states and 309344 transitions. Word has length 370 [2020-07-21 23:49:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:56,648 INFO L479 AbstractCegarLoop]: Abstraction has 186872 states and 309344 transitions. [2020-07-21 23:49:56,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:49:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 186872 states and 309344 transitions. [2020-07-21 23:49:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-07-21 23:49:56,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:56,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:56,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:56,971 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:56,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1717896620, now seen corresponding path program 1 times [2020-07-21 23:49:56,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:56,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494160374] [2020-07-21 23:49:56,973 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 23:49:57,430 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:49:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2335 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:57,528 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 23:49:57,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:57,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494160374] [2020-07-21 23:49:57,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:57,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:57,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396663410] [2020-07-21 23:49:57,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:57,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:57,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:57,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:57,530 INFO L87 Difference]: Start difference. First operand 186872 states and 309344 transitions. Second operand 3 states. [2020-07-21 23:50:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:06,977 INFO L93 Difference]: Finished difference Result 366015 states and 608985 transitions. [2020-07-21 23:50:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:06,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2020-07-21 23:50:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:07,273 INFO L225 Difference]: With dead ends: 366015 [2020-07-21 23:50:07,273 INFO L226 Difference]: Without dead ends: 256090 [2020-07-21 23:50:07,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 369 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 23:50:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256090 states. [2020-07-21 23:50:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256090 to 256086. [2020-07-21 23:50:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256086 states. [2020-07-21 23:50:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256086 states to 256086 states and 424250 transitions. [2020-07-21 23:50:22,598 INFO L78 Accepts]: Start accepts. Automaton has 256086 states and 424250 transitions. Word has length 371 [2020-07-21 23:50:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:22,598 INFO L479 AbstractCegarLoop]: Abstraction has 256086 states and 424250 transitions. [2020-07-21 23:50:22,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 256086 states and 424250 transitions. [2020-07-21 23:50:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-07-21 23:50:22,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:22,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:50:22,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:22,949 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash 612666295, now seen corresponding path program 1 times [2020-07-21 23:50:22,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:22,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162685664] [2020-07-21 23:50:22,951 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 23:50:23,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:50:23,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:23,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:23,508 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 23:50:23,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:23,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162685664] [2020-07-21 23:50:23,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:23,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:23,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880200049] [2020-07-21 23:50:23,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:23,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:23,511 INFO L87 Difference]: Start difference. First operand 256086 states and 424250 transitions. Second operand 3 states. [2020-07-21 23:50:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:37,718 INFO L93 Difference]: Finished difference Result 505341 states and 838679 transitions. [2020-07-21 23:50:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:37,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 375 [2020-07-21 23:50:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:38,114 INFO L225 Difference]: With dead ends: 505341 [2020-07-21 23:50:38,114 INFO L226 Difference]: Without dead ends: 356153 [2020-07-21 23:50:38,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 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 23:50:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356153 states. [2020-07-21 23:50:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356153 to 356149. [2020-07-21 23:50:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356149 states. [2020-07-21 23:50:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356149 states to 356149 states and 589368 transitions. [2020-07-21 23:50:58,452 INFO L78 Accepts]: Start accepts. Automaton has 356149 states and 589368 transitions. Word has length 375 [2020-07-21 23:50:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:58,452 INFO L479 AbstractCegarLoop]: Abstraction has 356149 states and 589368 transitions. [2020-07-21 23:50:58,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 356149 states and 589368 transitions. [2020-07-21 23:50:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 23:50:58,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:58,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:50:58,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:58,882 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:58,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2018637674, now seen corresponding path program 1 times [2020-07-21 23:50:58,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:58,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423617317] [2020-07-21 23:50:58,884 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 23:51:00,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:51:00,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:00,423 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 23:51:00,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:00,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423617317] [2020-07-21 23:51:00,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:00,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:00,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557687117] [2020-07-21 23:51:00,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:00,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:00,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:00,425 INFO L87 Difference]: Start difference. First operand 356149 states and 589368 transitions. Second operand 3 states. [2020-07-21 23:51:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:19,811 INFO L93 Difference]: Finished difference Result 704038 states and 1167281 transitions. [2020-07-21 23:51:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:19,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 379 [2020-07-21 23:51:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:21,083 INFO L225 Difference]: With dead ends: 704038 [2020-07-21 23:51:21,083 INFO L226 Difference]: Without dead ends: 497327 [2020-07-21 23:51:21,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 377 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 23:51:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497327 states. [2020-07-21 23:51:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497327 to 497323. [2020-07-21 23:51:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497323 states. [2020-07-21 23:51:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497323 states to 497323 states and 821798 transitions. [2020-07-21 23:51:49,305 INFO L78 Accepts]: Start accepts. Automaton has 497323 states and 821798 transitions. Word has length 379 [2020-07-21 23:51:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:49,306 INFO L479 AbstractCegarLoop]: Abstraction has 497323 states and 821798 transitions. [2020-07-21 23:51:49,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 497323 states and 821798 transitions. [2020-07-21 23:51:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-07-21 23:51:49,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:49,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:49,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:49,843 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1478742443, now seen corresponding path program 1 times [2020-07-21 23:51:49,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:49,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746879374] [2020-07-21 23:51:49,845 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 23:51:50,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:50,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1906 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:51,095 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 23:51:51,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:51,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746879374] [2020-07-21 23:51:51,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:51,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:51,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919349736] [2020-07-21 23:51:51,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:51,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:51,098 INFO L87 Difference]: Start difference. First operand 497323 states and 821798 transitions. Second operand 4 states. [2020-07-21 23:52:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:40,845 INFO L93 Difference]: Finished difference Result 1481920 states and 2449685 transitions. [2020-07-21 23:52:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:40,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 383 [2020-07-21 23:52:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:42,375 INFO L225 Difference]: With dead ends: 1481920 [2020-07-21 23:52:42,375 INFO L226 Difference]: Without dead ends: 984614 [2020-07-21 23:52:42,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 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 23:52:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984614 states. [2020-07-21 23:53:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984614 to 984610. [2020-07-21 23:53:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984610 states. [2020-07-21 23:53:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984610 states to 984610 states and 1624448 transitions. [2020-07-21 23:53:49,466 INFO L78 Accepts]: Start accepts. Automaton has 984610 states and 1624448 transitions. Word has length 383 [2020-07-21 23:53:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:49,466 INFO L479 AbstractCegarLoop]: Abstraction has 984610 states and 1624448 transitions. [2020-07-21 23:53:49,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 984610 states and 1624448 transitions. [2020-07-21 23:53:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-21 23:53:50,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:50,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:50,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:50,427 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1637288794, now seen corresponding path program 1 times [2020-07-21 23:53:50,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:50,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235479481] [2020-07-21 23:53:50,430 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 23:53:50,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:53:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2359 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:51,063 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 23:53:51,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:51,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235479481] [2020-07-21 23:53:51,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:51,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:51,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028749322] [2020-07-21 23:53:51,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:51,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:51,076 INFO L87 Difference]: Start difference. First operand 984610 states and 1624448 transitions. Second operand 3 states. [2020-07-21 23:54:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:57,238 INFO L93 Difference]: Finished difference Result 1939627 states and 3206810 transitions. [2020-07-21 23:54:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:57,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 385 [2020-07-21 23:54:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:59,401 INFO L225 Difference]: With dead ends: 1939627 [2020-07-21 23:54:59,402 INFO L226 Difference]: Without dead ends: 1369491 [2020-07-21 23:55:00,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 383 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 23:55:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369491 states.