/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:53:35,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:53:35,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:53:35,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:53:35,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:53:35,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:53:35,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:53:35,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:53:35,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:53:35,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:53:35,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:53:35,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:53:35,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:53:35,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:53:35,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:53:35,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:53:35,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:53:35,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:53:35,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:53:35,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:53:35,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:53:35,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:53:35,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:53:35,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:53:35,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:53:35,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:53:35,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:53:35,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:53:35,694 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 23:53:35,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:53:35,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:53:35,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:53:35,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:53:35,710 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:53:35,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:53:35,711 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:53:35,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:53:35,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:53:35,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:53:35,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:53:35,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:53:35,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:53:35,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:53:35,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:53:35,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:53:35,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:53:35,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:53:35,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:53:35,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:53:35,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:53:35,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:53:35,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:53:35,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:53:35,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:53:35,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:53:35,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:35,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:53:35,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:53:35,715 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 23:53:35,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:53:36,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:53:36,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:53:36,005 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:53:36,007 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:53:36,009 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 23:53:36,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb853da2/e5995731571e41699b40b8bc15df29e3/FLAGed13ade19 [2020-07-21 23:53:36,855 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:53:36,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 23:53:36,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb853da2/e5995731571e41699b40b8bc15df29e3/FLAGed13ade19 [2020-07-21 23:53:36,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb853da2/e5995731571e41699b40b8bc15df29e3 [2020-07-21 23:53:36,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:53:36,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:53:36,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:53:36,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:53:36,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:53:36,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:53:36" (1/1) ... [2020-07-21 23:53:36,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3474592d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:36, skipping insertion in model container [2020-07-21 23:53:36,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:53:36" (1/1) ... [2020-07-21 23:53:36,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:53:37,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:53:38,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:53:38,754 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:53:39,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:53:39,798 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:53:39,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39 WrapperNode [2020-07-21 23:53:39,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:53:39,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:53:39,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:53:39,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:53:39,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:39,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:39,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:39,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:39,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:40,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:40,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (1/1) ... [2020-07-21 23:53:40,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:53:40,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:53:40,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:53:40,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:53:40,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (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 23:53:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:53:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:53:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:53:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:53:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:53:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:53:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:53:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:53:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:53:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:53:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:53:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:53:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:53:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:53:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:53:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:53:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 23:53:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:53:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:53:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:53:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:53:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:53:44,726 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:53:44,726 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:53:44,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:53:44 BoogieIcfgContainer [2020-07-21 23:53:44,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:53:44,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:53:44,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:53:44,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:53:44,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:53:36" (1/3) ... [2020-07-21 23:53:44,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70777053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:53:44, skipping insertion in model container [2020-07-21 23:53:44,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:53:39" (2/3) ... [2020-07-21 23:53:44,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70777053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:53:44, skipping insertion in model container [2020-07-21 23:53:44,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:53:44" (3/3) ... [2020-07-21 23:53:44,757 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 23:53:44,773 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:53:44,787 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 23:53:44,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 23:53:44,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:53:44,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:53:44,847 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:53:44,847 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:53:44,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:53:44,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:53:44,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:53:44,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:53:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-21 23:53:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 23:53:44,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:44,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:44,969 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:44,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-21 23:53:44,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:44,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46428644] [2020-07-21 23:53:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:45,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:53:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:46,169 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 23:53:46,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:46,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46428644] [2020-07-21 23:53:46,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:46,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:53:46,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998852273] [2020-07-21 23:53:46,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:53:46,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:53:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:53:46,192 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-21 23:53:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:46,777 INFO L93 Difference]: Finished difference Result 4395 states and 7938 transitions. [2020-07-21 23:53:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:53:46,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 23:53:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:46,816 INFO L225 Difference]: With dead ends: 4395 [2020-07-21 23:53:46,817 INFO L226 Difference]: Without dead ends: 2918 [2020-07-21 23:53:46,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:53:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-07-21 23:53:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2875. [2020-07-21 23:53:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2020-07-21 23:53:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4738 transitions. [2020-07-21 23:53:47,020 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4738 transitions. Word has length 484 [2020-07-21 23:53:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:47,022 INFO L479 AbstractCegarLoop]: Abstraction has 2875 states and 4738 transitions. [2020-07-21 23:53:47,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4738 transitions. [2020-07-21 23:53:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 23:53:47,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:47,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:47,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:47,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2129727600, now seen corresponding path program 1 times [2020-07-21 23:53:47,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:47,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606942341] [2020-07-21 23:53:47,254 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 23:53:47,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:47,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:53:48,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:48,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606942341] [2020-07-21 23:53:48,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:48,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:48,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315307261] [2020-07-21 23:53:48,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:48,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:48,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:48,015 INFO L87 Difference]: Start difference. First operand 2875 states and 4738 transitions. Second operand 3 states. [2020-07-21 23:53:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:48,312 INFO L93 Difference]: Finished difference Result 8315 states and 13660 transitions. [2020-07-21 23:53:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:48,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 23:53:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:48,342 INFO L225 Difference]: With dead ends: 8315 [2020-07-21 23:53:48,343 INFO L226 Difference]: Without dead ends: 5669 [2020-07-21 23:53:48,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2020-07-21 23:53:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 5628. [2020-07-21 23:53:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2020-07-21 23:53:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 9249 transitions. [2020-07-21 23:53:48,561 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 9249 transitions. Word has length 486 [2020-07-21 23:53:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:48,562 INFO L479 AbstractCegarLoop]: Abstraction has 5628 states and 9249 transitions. [2020-07-21 23:53:48,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 9249 transitions. [2020-07-21 23:53:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 23:53:48,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:48,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:48,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:48,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:48,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1973900800, now seen corresponding path program 1 times [2020-07-21 23:53:48,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:48,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219580219] [2020-07-21 23:53:48,805 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 23:53:49,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:49,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:49,358 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 23:53:49,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:49,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219580219] [2020-07-21 23:53:49,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:49,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:49,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711773137] [2020-07-21 23:53:49,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:49,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:49,362 INFO L87 Difference]: Start difference. First operand 5628 states and 9249 transitions. Second operand 3 states. [2020-07-21 23:53:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:49,769 INFO L93 Difference]: Finished difference Result 16628 states and 27284 transitions. [2020-07-21 23:53:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:49,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 23:53:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:49,825 INFO L225 Difference]: With dead ends: 16628 [2020-07-21 23:53:49,825 INFO L226 Difference]: Without dead ends: 11031 [2020-07-21 23:53:49,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11031 states. [2020-07-21 23:53:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11031 to 5654. [2020-07-21 23:53:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5654 states. [2020-07-21 23:53:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 9287 transitions. [2020-07-21 23:53:50,138 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 9287 transitions. Word has length 487 [2020-07-21 23:53:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:50,139 INFO L479 AbstractCegarLoop]: Abstraction has 5654 states and 9287 transitions. [2020-07-21 23:53:50,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 9287 transitions. [2020-07-21 23:53:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 23:53:50,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:50,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:50,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:50,376 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash 950635083, now seen corresponding path program 1 times [2020-07-21 23:53:50,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:50,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303509062] [2020-07-21 23:53:50,378 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 23:53:50,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:50,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:53:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:50,974 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 23:53:50,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:50,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303509062] [2020-07-21 23:53:50,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:50,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:53:50,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066177214] [2020-07-21 23:53:50,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:53:50,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:53:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:53:50,978 INFO L87 Difference]: Start difference. First operand 5654 states and 9287 transitions. Second operand 4 states. [2020-07-21 23:53:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:51,379 INFO L93 Difference]: Finished difference Result 13381 states and 22146 transitions. [2020-07-21 23:53:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:51,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 23:53:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:51,411 INFO L225 Difference]: With dead ends: 13381 [2020-07-21 23:53:51,411 INFO L226 Difference]: Without dead ends: 6786 [2020-07-21 23:53:51,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:53:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6786 states. [2020-07-21 23:53:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6786 to 6745. [2020-07-21 23:53:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6745 states. [2020-07-21 23:53:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 11131 transitions. [2020-07-21 23:53:51,665 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 11131 transitions. Word has length 488 [2020-07-21 23:53:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:51,666 INFO L479 AbstractCegarLoop]: Abstraction has 6745 states and 11131 transitions. [2020-07-21 23:53:51,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 11131 transitions. [2020-07-21 23:53:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 23:53:51,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:51,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:51,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:51,903 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1310792764, now seen corresponding path program 1 times [2020-07-21 23:53:51,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:51,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534972863] [2020-07-21 23:53:51,905 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 23:53:52,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:52,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:52,978 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 23:53:52,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:52,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534972863] [2020-07-21 23:53:52,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:52,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:52,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444376539] [2020-07-21 23:53:52,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:52,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:52,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:52,981 INFO L87 Difference]: Start difference. First operand 6745 states and 11131 transitions. Second operand 3 states. [2020-07-21 23:53:53,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:53,298 INFO L93 Difference]: Finished difference Result 12116 states and 19674 transitions. [2020-07-21 23:53:53,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:53,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 23:53:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:53,320 INFO L225 Difference]: With dead ends: 12116 [2020-07-21 23:53:53,320 INFO L226 Difference]: Without dead ends: 8615 [2020-07-21 23:53:53,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2020-07-21 23:53:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 7533. [2020-07-21 23:53:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7533 states. [2020-07-21 23:53:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7533 states to 7533 states and 12428 transitions. [2020-07-21 23:53:53,587 INFO L78 Accepts]: Start accepts. Automaton has 7533 states and 12428 transitions. Word has length 490 [2020-07-21 23:53:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:53,588 INFO L479 AbstractCegarLoop]: Abstraction has 7533 states and 12428 transitions. [2020-07-21 23:53:53,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7533 states and 12428 transitions. [2020-07-21 23:53:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 23:53:53,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:53,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:53,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:53,820 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1313216099, now seen corresponding path program 1 times [2020-07-21 23:53:53,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:53,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644013578] [2020-07-21 23:53:53,821 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 23:53:54,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2145 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:54,538 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 23:53:54,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:54,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644013578] [2020-07-21 23:53:54,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:54,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:54,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273387993] [2020-07-21 23:53:54,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:54,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:54,542 INFO L87 Difference]: Start difference. First operand 7533 states and 12428 transitions. Second operand 3 states. [2020-07-21 23:53:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:55,032 INFO L93 Difference]: Finished difference Result 22076 states and 36379 transitions. [2020-07-21 23:53:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:55,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 23:53:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:55,072 INFO L225 Difference]: With dead ends: 22076 [2020-07-21 23:53:55,072 INFO L226 Difference]: Without dead ends: 14919 [2020-07-21 23:53:55,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14919 states. [2020-07-21 23:53:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14919 to 14849. [2020-07-21 23:53:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14849 states. [2020-07-21 23:53:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14849 states to 14849 states and 24419 transitions. [2020-07-21 23:53:55,766 INFO L78 Accepts]: Start accepts. Automaton has 14849 states and 24419 transitions. Word has length 490 [2020-07-21 23:53:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:55,767 INFO L479 AbstractCegarLoop]: Abstraction has 14849 states and 24419 transitions. [2020-07-21 23:53:55,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 14849 states and 24419 transitions. [2020-07-21 23:53:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 23:53:55,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:55,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:56,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:56,021 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1002481672, now seen corresponding path program 1 times [2020-07-21 23:53:56,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:56,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798439487] [2020-07-21 23:53:56,022 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 23:53:56,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:56,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:56,511 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 23:53:56,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:56,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798439487] [2020-07-21 23:53:56,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:56,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:56,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292198329] [2020-07-21 23:53:56,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:56,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:56,514 INFO L87 Difference]: Start difference. First operand 14849 states and 24419 transitions. Second operand 3 states. [2020-07-21 23:53:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:57,212 INFO L93 Difference]: Finished difference Result 44266 states and 72782 transitions. [2020-07-21 23:53:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:57,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 23:53:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:57,257 INFO L225 Difference]: With dead ends: 44266 [2020-07-21 23:53:57,257 INFO L226 Difference]: Without dead ends: 29554 [2020-07-21 23:53:57,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29554 states. [2020-07-21 23:53:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29554 to 14942. [2020-07-21 23:53:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14942 states. [2020-07-21 23:53:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14942 states to 14942 states and 24560 transitions. [2020-07-21 23:53:57,853 INFO L78 Accepts]: Start accepts. Automaton has 14942 states and 24560 transitions. Word has length 490 [2020-07-21 23:53:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:57,854 INFO L479 AbstractCegarLoop]: Abstraction has 14942 states and 24560 transitions. [2020-07-21 23:53:57,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 14942 states and 24560 transitions. [2020-07-21 23:53:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 23:53:57,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:57,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:58,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:58,110 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1327908555, now seen corresponding path program 1 times [2020-07-21 23:53:58,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:58,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901615407] [2020-07-21 23:53:58,113 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 23:53:58,486 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:58,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:58,749 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 23:53:58,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:58,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901615407] [2020-07-21 23:53:58,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:58,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:58,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686734403] [2020-07-21 23:53:58,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:58,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:58,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:58,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:58,752 INFO L87 Difference]: Start difference. First operand 14942 states and 24560 transitions. Second operand 3 states. [2020-07-21 23:53:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:59,389 INFO L93 Difference]: Finished difference Result 43882 states and 72086 transitions. [2020-07-21 23:53:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:59,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 23:53:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:59,435 INFO L225 Difference]: With dead ends: 43882 [2020-07-21 23:53:59,435 INFO L226 Difference]: Without dead ends: 29426 [2020-07-21 23:53:59,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29426 states. [2020-07-21 23:54:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29426 to 15094. [2020-07-21 23:54:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15094 states. [2020-07-21 23:54:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15094 states to 15094 states and 24784 transitions. [2020-07-21 23:54:00,814 INFO L78 Accepts]: Start accepts. Automaton has 15094 states and 24784 transitions. Word has length 491 [2020-07-21 23:54:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:00,814 INFO L479 AbstractCegarLoop]: Abstraction has 15094 states and 24784 transitions. [2020-07-21 23:54:00,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 15094 states and 24784 transitions. [2020-07-21 23:54:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 23:54:00,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:00,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:01,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:01,045 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1593985752, now seen corresponding path program 1 times [2020-07-21 23:54:01,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:01,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504881258] [2020-07-21 23:54:01,048 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 23:54:01,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:01,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:01,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:01,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504881258] [2020-07-21 23:54:01,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:01,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:01,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033611067] [2020-07-21 23:54:01,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:01,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:01,590 INFO L87 Difference]: Start difference. First operand 15094 states and 24784 transitions. Second operand 3 states. [2020-07-21 23:54:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:02,479 INFO L93 Difference]: Finished difference Result 44893 states and 73694 transitions. [2020-07-21 23:54:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:02,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 23:54:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:02,629 INFO L225 Difference]: With dead ends: 44893 [2020-07-21 23:54:02,629 INFO L226 Difference]: Without dead ends: 29990 [2020-07-21 23:54:02,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29990 states. [2020-07-21 23:54:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29990 to 15226. [2020-07-21 23:54:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15226 states. [2020-07-21 23:54:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15226 states to 15226 states and 24955 transitions. [2020-07-21 23:54:03,231 INFO L78 Accepts]: Start accepts. Automaton has 15226 states and 24955 transitions. Word has length 491 [2020-07-21 23:54:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:03,232 INFO L479 AbstractCegarLoop]: Abstraction has 15226 states and 24955 transitions. [2020-07-21 23:54:03,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 15226 states and 24955 transitions. [2020-07-21 23:54:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 23:54:03,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:03,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:03,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:03,447 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2114482470, now seen corresponding path program 1 times [2020-07-21 23:54:03,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:03,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671277741] [2020-07-21 23:54:03,449 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 23:54:03,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:03,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:04,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:04,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671277741] [2020-07-21 23:54:04,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:04,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:04,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484707439] [2020-07-21 23:54:04,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:04,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:04,086 INFO L87 Difference]: Start difference. First operand 15226 states and 24955 transitions. Second operand 3 states. [2020-07-21 23:54:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:04,978 INFO L93 Difference]: Finished difference Result 43259 states and 70772 transitions. [2020-07-21 23:54:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:04,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 23:54:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:05,015 INFO L225 Difference]: With dead ends: 43259 [2020-07-21 23:54:05,015 INFO L226 Difference]: Without dead ends: 29577 [2020-07-21 23:54:05,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29577 states. [2020-07-21 23:54:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29577 to 29538. [2020-07-21 23:54:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29538 states. [2020-07-21 23:54:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29538 states to 29538 states and 48233 transitions. [2020-07-21 23:54:05,975 INFO L78 Accepts]: Start accepts. Automaton has 29538 states and 48233 transitions. Word has length 492 [2020-07-21 23:54:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:05,976 INFO L479 AbstractCegarLoop]: Abstraction has 29538 states and 48233 transitions. [2020-07-21 23:54:05,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 29538 states and 48233 transitions. [2020-07-21 23:54:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 23:54:06,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:06,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:06,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:06,209 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash -750161328, now seen corresponding path program 1 times [2020-07-21 23:54:06,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:06,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109072294] [2020-07-21 23:54:06,212 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 23:54:06,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:06,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:06,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:06,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:06,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109072294] [2020-07-21 23:54:06,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:06,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:06,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644928263] [2020-07-21 23:54:06,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:06,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:06,916 INFO L87 Difference]: Start difference. First operand 29538 states and 48233 transitions. Second operand 3 states. [2020-07-21 23:54:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:07,950 INFO L93 Difference]: Finished difference Result 54960 states and 89018 transitions. [2020-07-21 23:54:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:07,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 23:54:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:07,995 INFO L225 Difference]: With dead ends: 54960 [2020-07-21 23:54:07,995 INFO L226 Difference]: Without dead ends: 39060 [2020-07-21 23:54:08,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39060 states. [2020-07-21 23:54:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39060 to 35074. [2020-07-21 23:54:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35074 states. [2020-07-21 23:54:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35074 states to 35074 states and 57361 transitions. [2020-07-21 23:54:09,939 INFO L78 Accepts]: Start accepts. Automaton has 35074 states and 57361 transitions. Word has length 492 [2020-07-21 23:54:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:09,940 INFO L479 AbstractCegarLoop]: Abstraction has 35074 states and 57361 transitions. [2020-07-21 23:54:09,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 35074 states and 57361 transitions. [2020-07-21 23:54:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 23:54:09,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:09,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:10,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:10,176 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1853130275, now seen corresponding path program 1 times [2020-07-21 23:54:10,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:10,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631596808] [2020-07-21 23:54:10,178 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 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 23:54:10,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:54:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:10,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:10,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631596808] [2020-07-21 23:54:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:10,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:54:10,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531548635] [2020-07-21 23:54:10,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:54:10,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:54:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:54:10,841 INFO L87 Difference]: Start difference. First operand 35074 states and 57361 transitions. Second operand 5 states. [2020-07-21 23:54:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:12,971 INFO L93 Difference]: Finished difference Result 57146 states and 92593 transitions. [2020-07-21 23:54:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:54:12,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-21 23:54:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:13,010 INFO L225 Difference]: With dead ends: 57146 [2020-07-21 23:54:13,010 INFO L226 Difference]: Without dead ends: 35074 [2020-07-21 23:54:13,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:54:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35074 states. [2020-07-21 23:54:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35074 to 35074. [2020-07-21 23:54:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35074 states. [2020-07-21 23:54:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35074 states to 35074 states and 57053 transitions. [2020-07-21 23:54:14,437 INFO L78 Accepts]: Start accepts. Automaton has 35074 states and 57053 transitions. Word has length 493 [2020-07-21 23:54:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:14,437 INFO L479 AbstractCegarLoop]: Abstraction has 35074 states and 57053 transitions. [2020-07-21 23:54:14,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:54:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 35074 states and 57053 transitions. [2020-07-21 23:54:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 23:54:14,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:14,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:14,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:14,676 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash -696912808, now seen corresponding path program 1 times [2020-07-21 23:54:14,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:14,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719806318] [2020-07-21 23:54:14,678 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 23:54:15,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:54:15,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:15,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:15,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719806318] [2020-07-21 23:54:15,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:15,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:54:15,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096003857] [2020-07-21 23:54:15,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:54:15,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:15,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:54:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:54:15,344 INFO L87 Difference]: Start difference. First operand 35074 states and 57053 transitions. Second operand 4 states. [2020-07-21 23:54:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:18,695 INFO L93 Difference]: Finished difference Result 103571 states and 168640 transitions. [2020-07-21 23:54:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:54:18,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 23:54:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:18,768 INFO L225 Difference]: With dead ends: 103571 [2020-07-21 23:54:18,768 INFO L226 Difference]: Without dead ends: 68938 [2020-07-21 23:54:18,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:54:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68938 states. [2020-07-21 23:54:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68938 to 68864. [2020-07-21 23:54:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68864 states. [2020-07-21 23:54:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68864 states to 68864 states and 111671 transitions. [2020-07-21 23:54:21,348 INFO L78 Accepts]: Start accepts. Automaton has 68864 states and 111671 transitions. Word has length 493 [2020-07-21 23:54:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:21,349 INFO L479 AbstractCegarLoop]: Abstraction has 68864 states and 111671 transitions. [2020-07-21 23:54:21,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:54:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 68864 states and 111671 transitions. [2020-07-21 23:54:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 23:54:21,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:21,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:21,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:21,592 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:21,592 INFO L82 PathProgramCache]: Analyzing trace with hash -828565192, now seen corresponding path program 1 times [2020-07-21 23:54:21,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:21,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071815958] [2020-07-21 23:54:21,594 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 23:54:21,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:21,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:22,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:22,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071815958] [2020-07-21 23:54:22,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:22,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:22,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638900054] [2020-07-21 23:54:22,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:22,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:22,481 INFO L87 Difference]: Start difference. First operand 68864 states and 111671 transitions. Second operand 3 states. [2020-07-21 23:54:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:28,216 INFO L93 Difference]: Finished difference Result 198637 states and 321633 transitions. [2020-07-21 23:54:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:28,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 23:54:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:28,358 INFO L225 Difference]: With dead ends: 198637 [2020-07-21 23:54:28,358 INFO L226 Difference]: Without dead ends: 129999 [2020-07-21 23:54:28,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129999 states. [2020-07-21 23:54:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129999 to 68347. [2020-07-21 23:54:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68347 states. [2020-07-21 23:54:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68347 states to 68347 states and 110841 transitions. [2020-07-21 23:54:31,431 INFO L78 Accepts]: Start accepts. Automaton has 68347 states and 110841 transitions. Word has length 494 [2020-07-21 23:54:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:31,432 INFO L479 AbstractCegarLoop]: Abstraction has 68347 states and 110841 transitions. [2020-07-21 23:54:31,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 68347 states and 110841 transitions. [2020-07-21 23:54:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:54:31,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:31,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:31,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:31,675 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 396726676, now seen corresponding path program 1 times [2020-07-21 23:54:31,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:31,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295014211] [2020-07-21 23:54:31,677 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 23:54:32,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:32,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:32,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295014211] [2020-07-21 23:54:32,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:32,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:32,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037498944] [2020-07-21 23:54:32,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:32,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:32,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:32,619 INFO L87 Difference]: Start difference. First operand 68347 states and 110841 transitions. Second operand 3 states. [2020-07-21 23:54:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:39,056 INFO L93 Difference]: Finished difference Result 198396 states and 321355 transitions. [2020-07-21 23:54:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:39,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:54:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:39,205 INFO L225 Difference]: With dead ends: 198396 [2020-07-21 23:54:39,205 INFO L226 Difference]: Without dead ends: 133450 [2020-07-21 23:54:39,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133450 states. [2020-07-21 23:54:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133450 to 133431. [2020-07-21 23:54:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133431 states. [2020-07-21 23:54:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133431 states to 133431 states and 215459 transitions. [2020-07-21 23:54:47,320 INFO L78 Accepts]: Start accepts. Automaton has 133431 states and 215459 transitions. Word has length 495 [2020-07-21 23:54:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:47,321 INFO L479 AbstractCegarLoop]: Abstraction has 133431 states and 215459 transitions. [2020-07-21 23:54:47,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 133431 states and 215459 transitions. [2020-07-21 23:54:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:54:47,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:47,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:47,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:47,589 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2096751919, now seen corresponding path program 1 times [2020-07-21 23:54:47,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:47,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809641639] [2020-07-21 23:54:47,592 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 23:54:47,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:48,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:48,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809641639] [2020-07-21 23:54:48,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:48,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:48,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488393531] [2020-07-21 23:54:48,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:48,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:48,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:48,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:48,074 INFO L87 Difference]: Start difference. First operand 133431 states and 215459 transitions. Second operand 3 states. [2020-07-21 23:55:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:00,763 INFO L93 Difference]: Finished difference Result 395992 states and 639068 transitions. [2020-07-21 23:55:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:55:00,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:55:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:01,089 INFO L225 Difference]: With dead ends: 395992 [2020-07-21 23:55:01,089 INFO L226 Difference]: Without dead ends: 263276 [2020-07-21 23:55:01,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:55:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263276 states. [2020-07-21 23:55:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263276 to 133191. [2020-07-21 23:55:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133191 states. [2020-07-21 23:55:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133191 states to 133191 states and 215064 transitions. [2020-07-21 23:55:08,699 INFO L78 Accepts]: Start accepts. Automaton has 133191 states and 215064 transitions. Word has length 495 [2020-07-21 23:55:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:08,700 INFO L479 AbstractCegarLoop]: Abstraction has 133191 states and 215064 transitions. [2020-07-21 23:55:08,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:55:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 133191 states and 215064 transitions. [2020-07-21 23:55:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 23:55:08,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:08,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:55:09,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:09,007 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash 50639610, now seen corresponding path program 1 times [2020-07-21 23:55:09,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:09,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486612058] [2020-07-21 23:55:09,009 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 23:55:09,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:55:09,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:55:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:55:09,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:09,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486612058] [2020-07-21 23:55:09,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:09,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:55:09,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362736169] [2020-07-21 23:55:09,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:55:09,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:09,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:55:09,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:55:09,472 INFO L87 Difference]: Start difference. First operand 133191 states and 215064 transitions. Second operand 4 states. [2020-07-21 23:55:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:22,824 INFO L93 Difference]: Finished difference Result 383711 states and 617334 transitions. [2020-07-21 23:55:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:55:22,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 23:55:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:23,153 INFO L225 Difference]: With dead ends: 383711 [2020-07-21 23:55:23,154 INFO L226 Difference]: Without dead ends: 260815 [2020-07-21 23:55:23,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:55:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260815 states. [2020-07-21 23:55:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260815 to 141383. [2020-07-21 23:55:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141383 states. [2020-07-21 23:55:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141383 states to 141383 states and 229394 transitions. [2020-07-21 23:55:32,011 INFO L78 Accepts]: Start accepts. Automaton has 141383 states and 229394 transitions. Word has length 496 [2020-07-21 23:55:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:32,012 INFO L479 AbstractCegarLoop]: Abstraction has 141383 states and 229394 transitions. [2020-07-21 23:55:32,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:55:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 141383 states and 229394 transitions. [2020-07-21 23:55:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 23:55:32,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:32,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:55:32,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:32,296 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash 247385465, now seen corresponding path program 1 times [2020-07-21 23:55:32,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:32,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408912939] [2020-07-21 23:55:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:32,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:55:32,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:32,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:55:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:55:32,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:32,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408912939] [2020-07-21 23:55:32,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:32,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:55:32,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258232702] [2020-07-21 23:55:32,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:55:32,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:55:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:55:32,810 INFO L87 Difference]: Start difference. First operand 141383 states and 229394 transitions. Second operand 4 states. [2020-07-21 23:55:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:44,121 INFO L93 Difference]: Finished difference Result 329637 states and 537264 transitions. [2020-07-21 23:55:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:55:44,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-21 23:55:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:44,321 INFO L225 Difference]: With dead ends: 329637 [2020-07-21 23:55:44,321 INFO L226 Difference]: Without dead ends: 169789 [2020-07-21 23:55:44,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:55:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169789 states. [2020-07-21 23:55:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169789 to 169668. [2020-07-21 23:55:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169668 states. [2020-07-21 23:55:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169668 states to 169668 states and 275920 transitions. [2020-07-21 23:55:57,365 INFO L78 Accepts]: Start accepts. Automaton has 169668 states and 275920 transitions. Word has length 497 [2020-07-21 23:55:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:57,365 INFO L479 AbstractCegarLoop]: Abstraction has 169668 states and 275920 transitions. [2020-07-21 23:55:57,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:55:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 169668 states and 275920 transitions. [2020-07-21 23:55:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:55:57,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:57,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:55:57,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:57,670 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:57,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1644676474, now seen corresponding path program 1 times [2020-07-21 23:55:57,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:57,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583372499] [2020-07-21 23:55:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:58,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:55:58,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:55:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:55:58,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:58,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583372499] [2020-07-21 23:55:58,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:58,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:55:58,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206517818] [2020-07-21 23:55:58,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:55:58,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:58,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:55:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:55:58,194 INFO L87 Difference]: Start difference. First operand 169668 states and 275920 transitions. Second operand 4 states. [2020-07-21 23:56:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:19,395 INFO L93 Difference]: Finished difference Result 463715 states and 749227 transitions. [2020-07-21 23:56:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:56:19,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 23:56:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:19,745 INFO L225 Difference]: With dead ends: 463715 [2020-07-21 23:56:19,746 INFO L226 Difference]: Without dead ends: 317663 [2020-07-21 23:56:19,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 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 23:56:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317663 states. [2020-07-21 23:56:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317663 to 188266. [2020-07-21 23:56:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188266 states. [2020-07-21 23:56:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188266 states to 188266 states and 307531 transitions. [2020-07-21 23:56:31,664 INFO L78 Accepts]: Start accepts. Automaton has 188266 states and 307531 transitions. Word has length 498 [2020-07-21 23:56:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:31,664 INFO L479 AbstractCegarLoop]: Abstraction has 188266 states and 307531 transitions. [2020-07-21 23:56:31,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:56:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 188266 states and 307531 transitions. [2020-07-21 23:56:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:56:31,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:31,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:32,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:32,009 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1058882398, now seen corresponding path program 1 times [2020-07-21 23:56:32,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:32,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241938427] [2020-07-21 23:56:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:32,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:56:32,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:56:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:56:32,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:32,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241938427] [2020-07-21 23:56:32,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:32,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:56:32,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089318953] [2020-07-21 23:56:32,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:56:32,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:56:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:32,660 INFO L87 Difference]: Start difference. First operand 188266 states and 307531 transitions. Second operand 3 states. [2020-07-21 23:56:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:54,807 INFO L93 Difference]: Finished difference Result 522092 states and 847459 transitions. [2020-07-21 23:56:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:54,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 23:56:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:55,805 INFO L225 Difference]: With dead ends: 522092 [2020-07-21 23:56:55,805 INFO L226 Difference]: Without dead ends: 359387 [2020-07-21 23:56:55,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359387 states. [2020-07-21 23:57:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359387 to 358955. [2020-07-21 23:57:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358955 states. [2020-07-21 23:57:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358955 states to 358955 states and 582292 transitions. [2020-07-21 23:57:22,711 INFO L78 Accepts]: Start accepts. Automaton has 358955 states and 582292 transitions. Word has length 498 [2020-07-21 23:57:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:22,711 INFO L479 AbstractCegarLoop]: Abstraction has 358955 states and 582292 transitions. [2020-07-21 23:57:22,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 358955 states and 582292 transitions. [2020-07-21 23:57:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 23:57:22,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:22,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:23,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:23,194 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1628882298, now seen corresponding path program 1 times [2020-07-21 23:57:23,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:23,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744191536] [2020-07-21 23:57:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:23,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:23,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:23,854 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 23:57:23,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:23,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744191536] [2020-07-21 23:57:23,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:23,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:23,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705911655] [2020-07-21 23:57:23,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:23,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:23,856 INFO L87 Difference]: Start difference. First operand 358955 states and 582292 transitions. Second operand 3 states. [2020-07-21 23:58:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:58:09,032 INFO L93 Difference]: Finished difference Result 1005902 states and 1624295 transitions. [2020-07-21 23:58:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:58:09,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 23:58:09,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:58:10,019 INFO L225 Difference]: With dead ends: 1005902 [2020-07-21 23:58:10,019 INFO L226 Difference]: Without dead ends: 697444 [2020-07-21 23:58:10,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:58:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697444 states. [2020-07-21 23:59:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697444 to 697427. [2020-07-21 23:59:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697427 states. [2020-07-21 23:59:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697427 states to 697427 states and 1125548 transitions. [2020-07-21 23:59:17,670 INFO L78 Accepts]: Start accepts. Automaton has 697427 states and 1125548 transitions. Word has length 501 [2020-07-21 23:59:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:17,670 INFO L479 AbstractCegarLoop]: Abstraction has 697427 states and 1125548 transitions. [2020-07-21 23:59:17,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 697427 states and 1125548 transitions. [2020-07-21 23:59:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 23:59:18,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:18,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (22)] Forcibly destroying the process [2020-07-21 23:59:19,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:19,060 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1686592528, now seen corresponding path program 1 times [2020-07-21 23:59:19,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:19,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540152314] [2020-07-21 23:59:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:19,539 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:19,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:59:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:59:19,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:19,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540152314] [2020-07-21 23:59:19,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:19,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:59:19,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733299206] [2020-07-21 23:59:19,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:59:19,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:59:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:59:19,777 INFO L87 Difference]: Start difference. First operand 697427 states and 1125548 transitions. Second operand 4 states. [2020-07-22 00:00:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:24,311 INFO L93 Difference]: Finished difference Result 1570689 states and 2543898 transitions. [2020-07-22 00:00:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:00:24,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-22 00:00:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:25,724 INFO L225 Difference]: With dead ends: 1570689 [2020-07-22 00:00:25,724 INFO L226 Difference]: Without dead ends: 881251 [2020-07-22 00:00:26,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-22 00:00:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881251 states. [2020-07-22 00:01:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881251 to 701404. [2020-07-22 00:01:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701404 states. [2020-07-22 00:01:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701404 states to 701404 states and 1132397 transitions. [2020-07-22 00:01:42,916 INFO L78 Accepts]: Start accepts. Automaton has 701404 states and 1132397 transitions. Word has length 502 [2020-07-22 00:01:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:01:42,917 INFO L479 AbstractCegarLoop]: Abstraction has 701404 states and 1132397 transitions. [2020-07-22 00:01:42,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:01:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 701404 states and 1132397 transitions. [2020-07-22 00:01:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-22 00:01:43,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:01:43,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:01:43,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:01:43,778 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:01:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:01:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1900129796, now seen corresponding path program 1 times [2020-07-22 00:01:43,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:01:43,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240461993] [2020-07-22 00:01:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:01:44,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:01:44,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:01:44,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:01:44,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:01:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:01:44,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:01:44,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240461993] [2020-07-22 00:01:44,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:01:44,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:01:44,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988714288] [2020-07-22 00:01:44,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:01:44,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:01:44,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:01:44,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:01:44,420 INFO L87 Difference]: Start difference. First operand 701404 states and 1132397 transitions. Second operand 3 states. [2020-07-22 00:03:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:03:39,210 INFO L93 Difference]: Finished difference Result 2033780 states and 3278394 transitions. [2020-07-22 00:03:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:03:39,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-22 00:03:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:03:41,286 INFO L225 Difference]: With dead ends: 2033780 [2020-07-22 00:03:41,286 INFO L226 Difference]: Without dead ends: 1373103 [2020-07-22 00:03:41,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:03:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373103 states.