/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 NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:01:13,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:01:13,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:01:13,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:01:13,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:01:13,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:01:13,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:01:13,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:01:13,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:01:13,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:01:13,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:01:13,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:01:13,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:01:13,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:01:13,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:01:13,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:01:13,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:01:13,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:01:13,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:01:13,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:01:13,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:01:13,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:01:13,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:01:13,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:01:13,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:01:13,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:01:13,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:01:13,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:01:13,765 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 [2020-07-20 15:01:13,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:01:13,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:01:13,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:01:13,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:01:13,802 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:01:13,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:01:13,803 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:01:13,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:01:13,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:01:13,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:01:13,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:01:13,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:01:13,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:01:13,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:01:13,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:01:13,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:01:13,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:01:13,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:01:13,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:01:13,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:01:13,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:01:13,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:01:13,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:01:13,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:01:13,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:01:13,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:01:13,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:13,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:01:13,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:01:13,809 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 -> NUM_FUNCTIONS 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 [2020-07-20 15:01:14,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:01:14,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:01:14,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:01:14,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:01:14,095 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:01:14,096 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 15:01:14,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f621be09d/365965913af64afc9b4e68255619d98d/FLAGcb0289988 [2020-07-20 15:01:14,879 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:01:14,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 15:01:14,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f621be09d/365965913af64afc9b4e68255619d98d/FLAGcb0289988 [2020-07-20 15:01:14,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f621be09d/365965913af64afc9b4e68255619d98d [2020-07-20 15:01:15,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:01:15,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:01:15,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:01:15,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:01:15,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:01:15,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:01:14" (1/1) ... [2020-07-20 15:01:15,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b045c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:15, skipping insertion in model container [2020-07-20 15:01:15,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:01:14" (1/1) ... [2020-07-20 15:01:15,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:01:15,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:01:16,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:01:16,700 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:01:18,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:01:18,224 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:01:18,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18 WrapperNode [2020-07-20 15:01:18,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:01:18,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:01:18,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:01:18,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:01:18,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (1/1) ... [2020-07-20 15:01:18,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:01:18,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:01:18,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:01:18,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:01:18,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (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 [2020-07-20 15:01:18,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:01:18,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:01:18,644 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:01:18,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:01:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:01:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:01:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 15:01:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:01:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:01:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:01:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:01:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:01:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:01:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:01:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:01:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:01:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:01:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 15:01:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:01:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:01:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:01:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:01:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:01:22,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:01:22,842 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:01:22,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:01:22 BoogieIcfgContainer [2020-07-20 15:01:22,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:01:22,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:01:22,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:01:22,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:01:22,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:01:14" (1/3) ... [2020-07-20 15:01:22,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a8bb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:01:22, skipping insertion in model container [2020-07-20 15:01:22,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:18" (2/3) ... [2020-07-20 15:01:22,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a8bb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:01:22, skipping insertion in model container [2020-07-20 15:01:22,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:01:22" (3/3) ... [2020-07-20 15:01:22,870 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 15:01:22,881 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:01:22,895 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 15:01:22,910 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 15:01:22,939 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:01:22,939 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:01:22,940 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:01:22,940 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:01:22,940 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:01:22,940 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:01:22,940 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:01:22,940 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:01:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-20 15:01:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 15:01:23,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:23,029 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] [2020-07-20 15:01:23,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-20 15:01:23,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:23,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831875819] [2020-07-20 15:01:23,047 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 [2020-07-20 15:01:23,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:23,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:01:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:24,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:24,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831875819] [2020-07-20 15:01:24,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:24,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:24,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026108077] [2020-07-20 15:01:24,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:24,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:24,221 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-20 15:01:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:24,627 INFO L93 Difference]: Finished difference Result 4120 states and 7457 transitions. [2020-07-20 15:01:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:24,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 15:01:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:24,662 INFO L225 Difference]: With dead ends: 4120 [2020-07-20 15:01:24,663 INFO L226 Difference]: Without dead ends: 2738 [2020-07-20 15:01:24,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2020-07-20 15:01:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2707. [2020-07-20 15:01:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2707 states. [2020-07-20 15:01:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 4430 transitions. [2020-07-20 15:01:24,854 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 4430 transitions. Word has length 473 [2020-07-20 15:01:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:24,856 INFO L479 AbstractCegarLoop]: Abstraction has 2707 states and 4430 transitions. [2020-07-20 15:01:24,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 4430 transitions. [2020-07-20 15:01:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 15:01:24,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:24,891 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] [2020-07-20 15:01:25,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:25,095 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1002795308, now seen corresponding path program 1 times [2020-07-20 15:01:25,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:25,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346345492] [2020-07-20 15:01:25,097 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 [2020-07-20 15:01:25,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:25,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:25,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:01:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:25,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:25,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346345492] [2020-07-20 15:01:25,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:25,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:25,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376952680] [2020-07-20 15:01:25,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:25,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:25,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:25,856 INFO L87 Difference]: Start difference. First operand 2707 states and 4430 transitions. Second operand 4 states. [2020-07-20 15:01:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:26,250 INFO L93 Difference]: Finished difference Result 8032 states and 13144 transitions. [2020-07-20 15:01:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:01:26,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-07-20 15:01:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:26,279 INFO L225 Difference]: With dead ends: 8032 [2020-07-20 15:01:26,279 INFO L226 Difference]: Without dead ends: 5349 [2020-07-20 15:01:26,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2020-07-20 15:01:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 5275. [2020-07-20 15:01:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5275 states. [2020-07-20 15:01:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5275 states to 5275 states and 8597 transitions. [2020-07-20 15:01:26,501 INFO L78 Accepts]: Start accepts. Automaton has 5275 states and 8597 transitions. Word has length 475 [2020-07-20 15:01:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:26,502 INFO L479 AbstractCegarLoop]: Abstraction has 5275 states and 8597 transitions. [2020-07-20 15:01:26,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5275 states and 8597 transitions. [2020-07-20 15:01:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 15:01:26,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:26,522 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] [2020-07-20 15:01:26,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:26,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 775272611, now seen corresponding path program 1 times [2020-07-20 15:01:26,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:26,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022027568] [2020-07-20 15:01:26,739 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 [2020-07-20 15:01:27,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:27,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1794 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:27,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:27,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022027568] [2020-07-20 15:01:27,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:27,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:27,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535188768] [2020-07-20 15:01:27,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:27,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:27,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:27,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:27,419 INFO L87 Difference]: Start difference. First operand 5275 states and 8597 transitions. Second operand 3 states. [2020-07-20 15:01:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:28,059 INFO L93 Difference]: Finished difference Result 15320 states and 24899 transitions. [2020-07-20 15:01:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:28,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-20 15:01:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:28,110 INFO L225 Difference]: With dead ends: 15320 [2020-07-20 15:01:28,110 INFO L226 Difference]: Without dead ends: 10444 [2020-07-20 15:01:28,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10444 states. [2020-07-20 15:01:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10444 to 10374. [2020-07-20 15:01:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10374 states. [2020-07-20 15:01:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10374 states to 10374 states and 16851 transitions. [2020-07-20 15:01:28,577 INFO L78 Accepts]: Start accepts. Automaton has 10374 states and 16851 transitions. Word has length 478 [2020-07-20 15:01:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:28,579 INFO L479 AbstractCegarLoop]: Abstraction has 10374 states and 16851 transitions. [2020-07-20 15:01:28,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 10374 states and 16851 transitions. [2020-07-20 15:01:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 15:01:28,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:28,612 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] [2020-07-20 15:01:28,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:28,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1715357784, now seen corresponding path program 1 times [2020-07-20 15:01:28,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:28,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081177848] [2020-07-20 15:01:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 15:01:29,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:29,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:29,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:29,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:29,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081177848] [2020-07-20 15:01:29,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:29,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:29,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966498089] [2020-07-20 15:01:29,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:29,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:29,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:29,357 INFO L87 Difference]: Start difference. First operand 10374 states and 16851 transitions. Second operand 3 states. [2020-07-20 15:01:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:29,844 INFO L93 Difference]: Finished difference Result 30958 states and 50267 transitions. [2020-07-20 15:01:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:29,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-20 15:01:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:29,914 INFO L225 Difference]: With dead ends: 30958 [2020-07-20 15:01:29,914 INFO L226 Difference]: Without dead ends: 20666 [2020-07-20 15:01:29,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20666 states. [2020-07-20 15:01:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20666 to 10442. [2020-07-20 15:01:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10442 states. [2020-07-20 15:01:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 16945 transitions. [2020-07-20 15:01:31,246 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 16945 transitions. Word has length 479 [2020-07-20 15:01:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:31,247 INFO L479 AbstractCegarLoop]: Abstraction has 10442 states and 16945 transitions. [2020-07-20 15:01:31,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 16945 transitions. [2020-07-20 15:01:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 15:01:31,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:31,273 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] [2020-07-20 15:01:31,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:31,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 692263589, now seen corresponding path program 1 times [2020-07-20 15:01:31,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:31,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290152362] [2020-07-20 15:01:31,490 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 [2020-07-20 15:01:31,872 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:31,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:31,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:32,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:32,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290152362] [2020-07-20 15:01:32,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:32,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:32,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543478284] [2020-07-20 15:01:32,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:32,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:32,029 INFO L87 Difference]: Start difference. First operand 10442 states and 16945 transitions. Second operand 3 states. [2020-07-20 15:01:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:32,673 INFO L93 Difference]: Finished difference Result 31082 states and 50447 transitions. [2020-07-20 15:01:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:32,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-20 15:01:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:32,720 INFO L225 Difference]: With dead ends: 31082 [2020-07-20 15:01:32,724 INFO L226 Difference]: Without dead ends: 20768 [2020-07-20 15:01:32,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20768 states. [2020-07-20 15:01:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20768 to 10532. [2020-07-20 15:01:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10532 states. [2020-07-20 15:01:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 17070 transitions. [2020-07-20 15:01:33,188 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 17070 transitions. Word has length 480 [2020-07-20 15:01:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:33,189 INFO L479 AbstractCegarLoop]: Abstraction has 10532 states and 17070 transitions. [2020-07-20 15:01:33,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 17070 transitions. [2020-07-20 15:01:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 15:01:33,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:33,211 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] [2020-07-20 15:01:33,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:33,425 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash -840168390, now seen corresponding path program 1 times [2020-07-20 15:01:33,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:33,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853707956] [2020-07-20 15:01:33,427 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 [2020-07-20 15:01:33,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:33,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:33,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:01:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:34,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853707956] [2020-07-20 15:01:34,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:34,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:34,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735767873] [2020-07-20 15:01:34,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:34,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:34,090 INFO L87 Difference]: Start difference. First operand 10532 states and 17070 transitions. Second operand 4 states. [2020-07-20 15:01:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:34,740 INFO L93 Difference]: Finished difference Result 24874 states and 40640 transitions. [2020-07-20 15:01:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:01:34,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-20 15:01:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:34,776 INFO L225 Difference]: With dead ends: 24874 [2020-07-20 15:01:34,776 INFO L226 Difference]: Without dead ends: 12894 [2020-07-20 15:01:34,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12894 states. [2020-07-20 15:01:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12894 to 12824. [2020-07-20 15:01:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12824 states. [2020-07-20 15:01:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12824 states to 12824 states and 20900 transitions. [2020-07-20 15:01:35,263 INFO L78 Accepts]: Start accepts. Automaton has 12824 states and 20900 transitions. Word has length 481 [2020-07-20 15:01:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:35,264 INFO L479 AbstractCegarLoop]: Abstraction has 12824 states and 20900 transitions. [2020-07-20 15:01:35,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12824 states and 20900 transitions. [2020-07-20 15:01:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 15:01:35,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:35,289 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] [2020-07-20 15:01:35,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:35,503 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1051893278, now seen corresponding path program 1 times [2020-07-20 15:01:35,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:35,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799214685] [2020-07-20 15:01:35,506 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 [2020-07-20 15:01:35,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:36,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:36,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799214685] [2020-07-20 15:01:36,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:36,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:36,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481577998] [2020-07-20 15:01:36,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:36,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:36,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:36,064 INFO L87 Difference]: Start difference. First operand 12824 states and 20900 transitions. Second operand 3 states. [2020-07-20 15:01:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:36,568 INFO L93 Difference]: Finished difference Result 36558 states and 59450 transitions. [2020-07-20 15:01:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:36,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-20 15:01:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:36,614 INFO L225 Difference]: With dead ends: 36558 [2020-07-20 15:01:36,614 INFO L226 Difference]: Without dead ends: 24694 [2020-07-20 15:01:36,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24694 states. [2020-07-20 15:01:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24694 to 12954. [2020-07-20 15:01:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12954 states. [2020-07-20 15:01:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12954 states to 12954 states and 21084 transitions. [2020-07-20 15:01:37,406 INFO L78 Accepts]: Start accepts. Automaton has 12954 states and 21084 transitions. Word has length 484 [2020-07-20 15:01:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:37,406 INFO L479 AbstractCegarLoop]: Abstraction has 12954 states and 21084 transitions. [2020-07-20 15:01:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 12954 states and 21084 transitions. [2020-07-20 15:01:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 15:01:37,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:37,431 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] [2020-07-20 15:01:37,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:37,646 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1457658508, now seen corresponding path program 1 times [2020-07-20 15:01:37,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:37,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019487950] [2020-07-20 15:01:37,648 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 [2020-07-20 15:01:38,041 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:38,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:38,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:38,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019487950] [2020-07-20 15:01:38,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:38,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:38,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133533268] [2020-07-20 15:01:38,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:38,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:38,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:38,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:38,251 INFO L87 Difference]: Start difference. First operand 12954 states and 21084 transitions. Second operand 3 states. [2020-07-20 15:01:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:38,960 INFO L93 Difference]: Finished difference Result 36719 states and 59637 transitions. [2020-07-20 15:01:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:38,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-20 15:01:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:38,997 INFO L225 Difference]: With dead ends: 36719 [2020-07-20 15:01:38,997 INFO L226 Difference]: Without dead ends: 25199 [2020-07-20 15:01:39,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25199 states. [2020-07-20 15:01:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25199 to 25137. [2020-07-20 15:01:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25137 states. [2020-07-20 15:01:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25137 states to 25137 states and 40753 transitions. [2020-07-20 15:01:39,837 INFO L78 Accepts]: Start accepts. Automaton has 25137 states and 40753 transitions. Word has length 485 [2020-07-20 15:01:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:39,838 INFO L479 AbstractCegarLoop]: Abstraction has 25137 states and 40753 transitions. [2020-07-20 15:01:39,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25137 states and 40753 transitions. [2020-07-20 15:01:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 15:01:39,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:39,866 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] [2020-07-20 15:01:40,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:40,070 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash 678175951, now seen corresponding path program 1 times [2020-07-20 15:01:40,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:40,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064250992] [2020-07-20 15:01:40,073 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 [2020-07-20 15:01:40,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:01:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:41,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:41,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064250992] [2020-07-20 15:01:41,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:41,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:01:41,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109374674] [2020-07-20 15:01:41,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:01:41,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:01:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:01:41,375 INFO L87 Difference]: Start difference. First operand 25137 states and 40753 transitions. Second operand 4 states. [2020-07-20 15:01:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:42,621 INFO L93 Difference]: Finished difference Result 68278 states and 110044 transitions. [2020-07-20 15:01:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:01:42,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 15:01:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:42,662 INFO L225 Difference]: With dead ends: 68278 [2020-07-20 15:01:42,662 INFO L226 Difference]: Without dead ends: 46838 [2020-07-20 15:01:42,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46838 states. [2020-07-20 15:01:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46838 to 27340. [2020-07-20 15:01:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27340 states. [2020-07-20 15:01:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27340 states to 27340 states and 44571 transitions. [2020-07-20 15:01:43,602 INFO L78 Accepts]: Start accepts. Automaton has 27340 states and 44571 transitions. Word has length 485 [2020-07-20 15:01:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:43,602 INFO L479 AbstractCegarLoop]: Abstraction has 27340 states and 44571 transitions. [2020-07-20 15:01:43,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:01:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 27340 states and 44571 transitions. [2020-07-20 15:01:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 15:01:43,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:43,625 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] [2020-07-20 15:01:43,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:43,841 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1261204539, now seen corresponding path program 1 times [2020-07-20 15:01:43,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:43,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030285860] [2020-07-20 15:01:43,844 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 [2020-07-20 15:01:44,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:01:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 15:01:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:44,315 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,348 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,374 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,523 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,576 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,623 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,624 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,625 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:44,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 15:01:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:45,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:45,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030285860] [2020-07-20 15:01:45,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:45,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-20 15:01:45,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066801106] [2020-07-20 15:01:45,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 15:01:45,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 15:01:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-20 15:01:45,489 INFO L87 Difference]: Start difference. First operand 27340 states and 44571 transitions. Second operand 12 states. [2020-07-20 15:01:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:51,025 INFO L93 Difference]: Finished difference Result 51705 states and 82057 transitions. [2020-07-20 15:01:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 15:01:51,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 487 [2020-07-20 15:01:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:51,073 INFO L225 Difference]: With dead ends: 51705 [2020-07-20 15:01:51,074 INFO L226 Difference]: Without dead ends: 48149 [2020-07-20 15:01:51,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 475 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-07-20 15:01:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48149 states. [2020-07-20 15:01:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48149 to 30072. [2020-07-20 15:01:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30072 states. [2020-07-20 15:01:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30072 states to 30072 states and 48593 transitions. [2020-07-20 15:01:52,476 INFO L78 Accepts]: Start accepts. Automaton has 30072 states and 48593 transitions. Word has length 487 [2020-07-20 15:01:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:52,477 INFO L479 AbstractCegarLoop]: Abstraction has 30072 states and 48593 transitions. [2020-07-20 15:01:52,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 15:01:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30072 states and 48593 transitions. [2020-07-20 15:01:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 15:01:52,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:52,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:01:52,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:52,725 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 773398233, now seen corresponding path program 1 times [2020-07-20 15:01:52,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:52,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820735866] [2020-07-20 15:01:52,727 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 [2020-07-20 15:01:53,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:53,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:53,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:53,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:53,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820735866] [2020-07-20 15:01:53,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:53,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:53,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465643249] [2020-07-20 15:01:53,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:53,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:53,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:53,338 INFO L87 Difference]: Start difference. First operand 30072 states and 48593 transitions. Second operand 3 states. [2020-07-20 15:01:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:56,243 INFO L93 Difference]: Finished difference Result 84510 states and 136133 transitions. [2020-07-20 15:01:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:01:56,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-20 15:01:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:56,325 INFO L225 Difference]: With dead ends: 84510 [2020-07-20 15:01:56,325 INFO L226 Difference]: Without dead ends: 58134 [2020-07-20 15:01:56,365 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 [2020-07-20 15:01:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58134 states. [2020-07-20 15:01:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58134 to 58105. [2020-07-20 15:01:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58105 states. [2020-07-20 15:01:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58105 states to 58105 states and 93496 transitions. [2020-07-20 15:01:58,792 INFO L78 Accepts]: Start accepts. Automaton has 58105 states and 93496 transitions. Word has length 487 [2020-07-20 15:01:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:58,793 INFO L479 AbstractCegarLoop]: Abstraction has 58105 states and 93496 transitions. [2020-07-20 15:01:58,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:01:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 58105 states and 93496 transitions. [2020-07-20 15:01:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 15:01:58,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:58,839 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] [2020-07-20 15:01:59,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:59,040 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1753685625, now seen corresponding path program 1 times [2020-07-20 15:01:59,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:59,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935048876] [2020-07-20 15:01:59,042 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 [2020-07-20 15:01:59,343 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:01:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:01:59,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:59,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:59,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935048876] [2020-07-20 15:01:59,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:59,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:01:59,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339392207] [2020-07-20 15:01:59,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:01:59,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:01:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:01:59,488 INFO L87 Difference]: Start difference. First operand 58105 states and 93496 transitions. Second operand 3 states. [2020-07-20 15:02:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:05,045 INFO L93 Difference]: Finished difference Result 154217 states and 245148 transitions. [2020-07-20 15:02:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:02:05,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 15:02:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:05,148 INFO L225 Difference]: With dead ends: 154217 [2020-07-20 15:02:05,148 INFO L226 Difference]: Without dead ends: 106203 [2020-07-20 15:02:05,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:02:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106203 states. [2020-07-20 15:02:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106203 to 59481. [2020-07-20 15:02:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59481 states. [2020-07-20 15:02:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59481 states to 59481 states and 95578 transitions. [2020-07-20 15:02:07,881 INFO L78 Accepts]: Start accepts. Automaton has 59481 states and 95578 transitions. Word has length 488 [2020-07-20 15:02:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:07,882 INFO L479 AbstractCegarLoop]: Abstraction has 59481 states and 95578 transitions. [2020-07-20 15:02:07,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:02:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 59481 states and 95578 transitions. [2020-07-20 15:02:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 15:02:07,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:07,935 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] [2020-07-20 15:02:08,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:08,142 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1653951966, now seen corresponding path program 1 times [2020-07-20 15:02:08,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:08,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618780020] [2020-07-20 15:02:08,144 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 [2020-07-20 15:02:08,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:02:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:02:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:08,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:08,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618780020] [2020-07-20 15:02:08,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:08,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:02:08,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671444185] [2020-07-20 15:02:08,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:02:08,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:08,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:02:08,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:02:08,647 INFO L87 Difference]: Start difference. First operand 59481 states and 95578 transitions. Second operand 4 states. [2020-07-20 15:02:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:14,071 INFO L93 Difference]: Finished difference Result 143207 states and 230829 transitions. [2020-07-20 15:02:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:02:14,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 15:02:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:14,148 INFO L225 Difference]: With dead ends: 143207 [2020-07-20 15:02:14,148 INFO L226 Difference]: Without dead ends: 75180 [2020-07-20 15:02:14,191 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 [2020-07-20 15:02:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75180 states. [2020-07-20 15:02:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75180 to 75086. [2020-07-20 15:02:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75086 states. [2020-07-20 15:02:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75086 states to 75086 states and 120899 transitions. [2020-07-20 15:02:17,367 INFO L78 Accepts]: Start accepts. Automaton has 75086 states and 120899 transitions. Word has length 488 [2020-07-20 15:02:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:17,367 INFO L479 AbstractCegarLoop]: Abstraction has 75086 states and 120899 transitions. [2020-07-20 15:02:17,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:02:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 75086 states and 120899 transitions. [2020-07-20 15:02:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 15:02:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:17,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:02:17,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:17,630 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1177298490, now seen corresponding path program 1 times [2020-07-20 15:02:17,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:17,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161049590] [2020-07-20 15:02:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 15:02:17,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:02:17,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:02:17,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:18,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:18,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161049590] [2020-07-20 15:02:18,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:18,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:02:18,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688262439] [2020-07-20 15:02:18,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:02:18,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:02:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:02:18,065 INFO L87 Difference]: Start difference. First operand 75086 states and 120899 transitions. Second operand 4 states. [2020-07-20 15:02:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:26,058 INFO L93 Difference]: Finished difference Result 209688 states and 335910 transitions. [2020-07-20 15:02:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:02:26,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 15:02:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:26,199 INFO L225 Difference]: With dead ends: 209688 [2020-07-20 15:02:26,199 INFO L226 Difference]: Without dead ends: 147626 [2020-07-20 15:02:26,248 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 [2020-07-20 15:02:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147626 states. [2020-07-20 15:02:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147626 to 90416. [2020-07-20 15:02:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90416 states. [2020-07-20 15:02:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90416 states to 90416 states and 146308 transitions. [2020-07-20 15:02:30,455 INFO L78 Accepts]: Start accepts. Automaton has 90416 states and 146308 transitions. Word has length 488 [2020-07-20 15:02:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:30,455 INFO L479 AbstractCegarLoop]: Abstraction has 90416 states and 146308 transitions. [2020-07-20 15:02:30,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:02:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 90416 states and 146308 transitions. [2020-07-20 15:02:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 15:02:30,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:30,536 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] [2020-07-20 15:02:30,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:30,737 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 64496254, now seen corresponding path program 1 times [2020-07-20 15:02:30,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:30,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334989538] [2020-07-20 15:02:30,739 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 [2020-07-20 15:02:31,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:02:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:02:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:31,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:31,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334989538] [2020-07-20 15:02:31,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:31,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:02:31,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108889420] [2020-07-20 15:02:31,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:02:31,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:02:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:02:31,595 INFO L87 Difference]: Start difference. First operand 90416 states and 146308 transitions. Second operand 4 states. [2020-07-20 15:02:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:39,971 INFO L93 Difference]: Finished difference Result 223292 states and 363455 transitions. [2020-07-20 15:02:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:02:39,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-20 15:02:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:40,107 INFO L225 Difference]: With dead ends: 223292 [2020-07-20 15:02:40,107 INFO L226 Difference]: Without dead ends: 119142 [2020-07-20 15:02:40,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:02:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119142 states. [2020-07-20 15:02:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119142 to 119113. [2020-07-20 15:02:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119113 states. [2020-07-20 15:02:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119113 states to 119113 states and 193347 transitions. [2020-07-20 15:02:45,623 INFO L78 Accepts]: Start accepts. Automaton has 119113 states and 193347 transitions. Word has length 489 [2020-07-20 15:02:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:45,623 INFO L479 AbstractCegarLoop]: Abstraction has 119113 states and 193347 transitions. [2020-07-20 15:02:45,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:02:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 119113 states and 193347 transitions. [2020-07-20 15:02:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 15:02:45,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:45,747 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] [2020-07-20 15:02:45,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:45,955 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1509859368, now seen corresponding path program 1 times [2020-07-20 15:02:45,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:45,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031174594] [2020-07-20 15:02:45,957 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 [2020-07-20 15:02:46,366 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:02:46,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:02:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:46,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:46,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031174594] [2020-07-20 15:02:46,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:46,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:02:46,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55587729] [2020-07-20 15:02:46,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:02:46,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:46,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:02:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:02:46,599 INFO L87 Difference]: Start difference. First operand 119113 states and 193347 transitions. Second operand 3 states. [2020-07-20 15:02:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:58,187 INFO L93 Difference]: Finished difference Result 295981 states and 476729 transitions. [2020-07-20 15:02:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:02:58,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-20 15:02:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:58,429 INFO L225 Difference]: With dead ends: 295981 [2020-07-20 15:02:58,429 INFO L226 Difference]: Without dead ends: 214753 [2020-07-20 15:02:58,504 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 [2020-07-20 15:02:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214753 states. [2020-07-20 15:03:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214753 to 214726. [2020-07-20 15:03:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214726 states. [2020-07-20 15:03:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214726 states to 214726 states and 345933 transitions. [2020-07-20 15:03:13,546 INFO L78 Accepts]: Start accepts. Automaton has 214726 states and 345933 transitions. Word has length 490 [2020-07-20 15:03:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:13,546 INFO L479 AbstractCegarLoop]: Abstraction has 214726 states and 345933 transitions. [2020-07-20 15:03:13,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:03:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 214726 states and 345933 transitions. [2020-07-20 15:03:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 15:03:13,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:13,824 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] [2020-07-20 15:03:14,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:14,025 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1157618706, now seen corresponding path program 1 times [2020-07-20 15:03:14,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:14,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198143754] [2020-07-20 15:03:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 15:03:14,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:03:14,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:03:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:14,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:14,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198143754] [2020-07-20 15:03:14,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:14,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:03:14,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713180206] [2020-07-20 15:03:14,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:03:14,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:14,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:03:14,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:03:14,532 INFO L87 Difference]: Start difference. First operand 214726 states and 345933 transitions. Second operand 4 states. [2020-07-20 15:03:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:37,598 INFO L93 Difference]: Finished difference Result 558998 states and 893836 transitions. [2020-07-20 15:03:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:03:37,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 15:03:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:38,079 INFO L225 Difference]: With dead ends: 558998 [2020-07-20 15:03:38,079 INFO L226 Difference]: Without dead ends: 397442 [2020-07-20 15:03:38,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:03:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397442 states. [2020-07-20 15:03:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397442 to 259040. [2020-07-20 15:03:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259040 states. [2020-07-20 15:03:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259040 states to 259040 states and 416435 transitions. [2020-07-20 15:03:58,652 INFO L78 Accepts]: Start accepts. Automaton has 259040 states and 416435 transitions. Word has length 490 [2020-07-20 15:03:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:58,653 INFO L479 AbstractCegarLoop]: Abstraction has 259040 states and 416435 transitions. [2020-07-20 15:03:58,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:03:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 259040 states and 416435 transitions. [2020-07-20 15:03:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-20 15:03:58,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:58,951 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] [2020-07-20 15:03:59,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:59,160 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 580415724, now seen corresponding path program 1 times [2020-07-20 15:03:59,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:59,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67113651] [2020-07-20 15:03:59,164 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 [2020-07-20 15:03:59,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:03:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:59,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:03:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:59,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:59,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67113651] [2020-07-20 15:03:59,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:59,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:03:59,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637172386] [2020-07-20 15:03:59,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:03:59,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:59,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:03:59,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:03:59,892 INFO L87 Difference]: Start difference. First operand 259040 states and 416435 transitions. Second operand 3 states. [2020-07-20 15:04:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:27,071 INFO L93 Difference]: Finished difference Result 615892 states and 981157 transitions. [2020-07-20 15:04:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:27,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-20 15:04:27,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:28,376 INFO L225 Difference]: With dead ends: 615892 [2020-07-20 15:04:28,376 INFO L226 Difference]: Without dead ends: 453997 [2020-07-20 15:04:28,540 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 [2020-07-20 15:04:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453997 states. [2020-07-20 15:04:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453997 to 453813. [2020-07-20 15:04:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453813 states. [2020-07-20 15:05:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453813 states to 453813 states and 722800 transitions. [2020-07-20 15:05:00,710 INFO L78 Accepts]: Start accepts. Automaton has 453813 states and 722800 transitions. Word has length 491 [2020-07-20 15:05:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:00,711 INFO L479 AbstractCegarLoop]: Abstraction has 453813 states and 722800 transitions. [2020-07-20 15:05:00,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 453813 states and 722800 transitions. [2020-07-20 15:05:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-20 15:05:07,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:07,890 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] [2020-07-20 15:05:08,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:08,091 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 512179446, now seen corresponding path program 1 times [2020-07-20 15:05:08,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:08,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978128954] [2020-07-20 15:05:08,093 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 [2020-07-20 15:05:08,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:08,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:08,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978128954] [2020-07-20 15:05:08,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:08,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:08,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173088714] [2020-07-20 15:05:08,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:08,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:08,586 INFO L87 Difference]: Start difference. First operand 453813 states and 722800 transitions. Second operand 3 states. [2020-07-20 15:05:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:56,130 INFO L93 Difference]: Finished difference Result 1090381 states and 1730915 transitions. [2020-07-20 15:05:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:56,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-20 15:05:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:57,075 INFO L225 Difference]: With dead ends: 1090381 [2020-07-20 15:05:57,075 INFO L226 Difference]: Without dead ends: 734792 [2020-07-20 15:05:57,339 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 [2020-07-20 15:05:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734792 states. [2020-07-20 15:06:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734792 to 443553. [2020-07-20 15:06:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443553 states. [2020-07-20 15:06:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443553 states to 443553 states and 706185 transitions. [2020-07-20 15:06:36,947 INFO L78 Accepts]: Start accepts. Automaton has 443553 states and 706185 transitions. Word has length 491 [2020-07-20 15:06:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:36,947 INFO L479 AbstractCegarLoop]: Abstraction has 443553 states and 706185 transitions. [2020-07-20 15:06:36,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 443553 states and 706185 transitions. [2020-07-20 15:06:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 15:06:37,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:37,460 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] [2020-07-20 15:06:37,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:37,673 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2050367900, now seen corresponding path program 1 times [2020-07-20 15:06:37,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:37,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118154498] [2020-07-20 15:06:37,675 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 [2020-07-20 15:06:37,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:37,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:38,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:38,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118154498] [2020-07-20 15:06:38,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:38,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:38,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912184756] [2020-07-20 15:06:38,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:38,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:38,109 INFO L87 Difference]: Start difference. First operand 443553 states and 706185 transitions. Second operand 3 states. [2020-07-20 15:07:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:36,540 INFO L93 Difference]: Finished difference Result 1147860 states and 1806608 transitions. [2020-07-20 15:07:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:07:36,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-20 15:07:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:37,632 INFO L225 Difference]: With dead ends: 1147860 [2020-07-20 15:07:37,632 INFO L226 Difference]: Without dead ends: 779326 [2020-07-20 15:07:37,941 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 [2020-07-20 15:07:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779326 states. [2020-07-20 15:08:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779326 to 458269. [2020-07-20 15:08:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458269 states. [2020-07-20 15:08:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458269 states to 458269 states and 726858 transitions. [2020-07-20 15:08:19,646 INFO L78 Accepts]: Start accepts. Automaton has 458269 states and 726858 transitions. Word has length 492 [2020-07-20 15:08:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:19,647 INFO L479 AbstractCegarLoop]: Abstraction has 458269 states and 726858 transitions. [2020-07-20 15:08:19,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 458269 states and 726858 transitions. [2020-07-20 15:08:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 15:08:20,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:20,163 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] [2020-07-20 15:08:20,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:20,364 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1363286829, now seen corresponding path program 1 times [2020-07-20 15:08:20,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:20,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301934210] [2020-07-20 15:08:20,366 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 [2020-07-20 15:08:21,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:21,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:08:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:21,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:21,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301934210] [2020-07-20 15:08:21,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:21,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:08:21,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622110107] [2020-07-20 15:08:21,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:08:21,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:21,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:08:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:08:21,593 INFO L87 Difference]: Start difference. First operand 458269 states and 726858 transitions. Second operand 4 states. [2020-07-20 15:09:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:13,633 INFO L93 Difference]: Finished difference Result 1180978 states and 1881079 transitions. [2020-07-20 15:09:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:09:13,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-20 15:09:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:14,549 INFO L225 Difference]: With dead ends: 1180978 [2020-07-20 15:09:14,549 INFO L226 Difference]: Without dead ends: 618251 [2020-07-20 15:09:14,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:09:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618251 states. [2020-07-20 15:10:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618251 to 618224. [2020-07-20 15:10:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618224 states. [2020-07-20 15:10:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618224 states to 618224 states and 981173 transitions. [2020-07-20 15:10:05,234 INFO L78 Accepts]: Start accepts. Automaton has 618224 states and 981173 transitions. Word has length 492 [2020-07-20 15:10:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:05,234 INFO L479 AbstractCegarLoop]: Abstraction has 618224 states and 981173 transitions. [2020-07-20 15:10:05,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:10:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 618224 states and 981173 transitions. [2020-07-20 15:10:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 15:10:15,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:15,962 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] [2020-07-20 15:10:16,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:16,163 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:16,164 INFO L82 PathProgramCache]: Analyzing trace with hash -478637481, now seen corresponding path program 1 times [2020-07-20 15:10:16,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:16,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427068413] [2020-07-20 15:10:16,165 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 [2020-07-20 15:10:16,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:10:16,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:16,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:10:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:10:16,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427068413] [2020-07-20 15:10:16,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:16,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:10:16,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547803134] [2020-07-20 15:10:16,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:10:16,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:10:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:10:16,626 INFO L87 Difference]: Start difference. First operand 618224 states and 981173 transitions. Second operand 4 states. [2020-07-20 15:11:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:21,420 INFO L93 Difference]: Finished difference Result 1440142 states and 2288342 transitions. [2020-07-20 15:11:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:11:21,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 15:11:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:22,676 INFO L225 Difference]: With dead ends: 1440142 [2020-07-20 15:11:22,676 INFO L226 Difference]: Without dead ends: 862210 [2020-07-20 15:11:23,062 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 [2020-07-20 15:11:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862210 states.