/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:18:23,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:18:23,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:18:23,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:18:23,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:18:23,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:18:23,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:18:23,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:18:23,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:18:23,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:18:23,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:18:23,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:18:23,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:18:23,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:18:23,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:18:23,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:18:23,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:18:23,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:18:23,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:18:23,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:18:23,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:18:23,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:18:23,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:18:23,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:18:23,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:18:23,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:18:23,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:18:23,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:18:23,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:18:23,929 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:18:23,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:18:23,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:18:23,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:18:23,931 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:18:23,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:18:23,932 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:18:23,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:18:23,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:18:23,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:18:23,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:18:23,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:18:23,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:18:23,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:18:23,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:18:23,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:18:23,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:18:23,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:18:23,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:18:23,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:18:23,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:18:23,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:23,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:18:23,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:18:23,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:18:23,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:18:23,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:23,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:18:23,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:18:23,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:18:24,251 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:18:24,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:18:24,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:18:24,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:18:24,275 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:18:24,277 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 02:18:24,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43678dcdf/777b412994694c908df3652d58371449/FLAG1f850ebd6 [2020-07-21 02:18:25,146 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:18:25,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 02:18:25,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43678dcdf/777b412994694c908df3652d58371449/FLAG1f850ebd6 [2020-07-21 02:18:25,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43678dcdf/777b412994694c908df3652d58371449 [2020-07-21 02:18:25,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:18:25,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:18:25,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:25,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:18:25,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:18:25,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:25" (1/1) ... [2020-07-21 02:18:25,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a0c899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:25, skipping insertion in model container [2020-07-21 02:18:25,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:25" (1/1) ... [2020-07-21 02:18:25,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:18:25,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:18:26,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:26,967 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:18:27,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:27,940 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:18:27,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27 WrapperNode [2020-07-21 02:18:27,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:27,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:18:27,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:18:27,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:18:27,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:27,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:28,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:28,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:28,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:28,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:28,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... [2020-07-21 02:18:28,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:18:28,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:18:28,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:18:28,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:18:28,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:28,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:18:28,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:18:28,253 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:18:28,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:18:28,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:18:28,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:18:28,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:18:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:18:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:18:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:18:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:18:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:18:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:18:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:18:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:18:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:18:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:18:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:18:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:18:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:18:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:18:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:18:32,272 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:18:32,273 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:18:32,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:32 BoogieIcfgContainer [2020-07-21 02:18:32,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:18:32,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:18:32,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:18:32,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:18:32,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:18:25" (1/3) ... [2020-07-21 02:18:32,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c62f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:32, skipping insertion in model container [2020-07-21 02:18:32,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:27" (2/3) ... [2020-07-21 02:18:32,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c62f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:32, skipping insertion in model container [2020-07-21 02:18:32,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:32" (3/3) ... [2020-07-21 02:18:32,299 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 02:18:32,310 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:18:32,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:18:32,334 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:18:32,366 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:18:32,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:18:32,366 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:18:32,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:18:32,366 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:18:32,366 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:18:32,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:18:32,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:18:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-21 02:18:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 02:18:32,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:32,457 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] [2020-07-21 02:18:32,457 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-21 02:18:32,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:32,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083622000] [2020-07-21 02:18:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:33,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:33,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:33,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:33,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083622000] [2020-07-21 02:18:33,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:33,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:33,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385675088] [2020-07-21 02:18:33,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:33,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:33,638 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-07-21 02:18:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:34,113 INFO L93 Difference]: Finished difference Result 3914 states and 7060 transitions. [2020-07-21 02:18:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:18:34,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-21 02:18:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:34,145 INFO L225 Difference]: With dead ends: 3914 [2020-07-21 02:18:34,146 INFO L226 Difference]: Without dead ends: 2599 [2020-07-21 02:18:34,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-07-21 02:18:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-07-21 02:18:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-07-21 02:18:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4267 transitions. [2020-07-21 02:18:34,383 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4267 transitions. Word has length 467 [2020-07-21 02:18:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:34,384 INFO L479 AbstractCegarLoop]: Abstraction has 2597 states and 4267 transitions. [2020-07-21 02:18:34,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4267 transitions. [2020-07-21 02:18:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 02:18:34,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:34,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:34,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:34,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1773568236, now seen corresponding path program 1 times [2020-07-21 02:18:34,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:34,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137023844] [2020-07-21 02:18:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:35,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:35,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:35,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137023844] [2020-07-21 02:18:35,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:35,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:35,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638701723] [2020-07-21 02:18:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:35,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:35,406 INFO L87 Difference]: Start difference. First operand 2597 states and 4267 transitions. Second operand 3 states. [2020-07-21 02:18:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:35,726 INFO L93 Difference]: Finished difference Result 7490 states and 12265 transitions. [2020-07-21 02:18:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:35,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 02:18:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:35,754 INFO L225 Difference]: With dead ends: 7490 [2020-07-21 02:18:35,754 INFO L226 Difference]: Without dead ends: 5122 [2020-07-21 02:18:35,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2020-07-21 02:18:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 5120. [2020-07-21 02:18:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5120 states. [2020-07-21 02:18:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 8384 transitions. [2020-07-21 02:18:36,061 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 8384 transitions. Word has length 469 [2020-07-21 02:18:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:36,062 INFO L479 AbstractCegarLoop]: Abstraction has 5120 states and 8384 transitions. [2020-07-21 02:18:36,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 8384 transitions. [2020-07-21 02:18:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 02:18:36,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:36,091 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] [2020-07-21 02:18:36,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:36,306 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:36,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 945656500, now seen corresponding path program 1 times [2020-07-21 02:18:36,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:36,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023670004] [2020-07-21 02:18:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:36,926 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:37,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:37,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023670004] [2020-07-21 02:18:37,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:37,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:37,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902134846] [2020-07-21 02:18:37,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:37,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:37,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:37,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:37,073 INFO L87 Difference]: Start difference. First operand 5120 states and 8384 transitions. Second operand 3 states. [2020-07-21 02:18:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:37,623 INFO L93 Difference]: Finished difference Result 15104 states and 24689 transitions. [2020-07-21 02:18:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:37,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 02:18:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:37,689 INFO L225 Difference]: With dead ends: 15104 [2020-07-21 02:18:37,689 INFO L226 Difference]: Without dead ends: 10015 [2020-07-21 02:18:37,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10015 states. [2020-07-21 02:18:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10015 to 5146. [2020-07-21 02:18:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5146 states. [2020-07-21 02:18:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 8422 transitions. [2020-07-21 02:18:38,128 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 8422 transitions. Word has length 470 [2020-07-21 02:18:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:38,128 INFO L479 AbstractCegarLoop]: Abstraction has 5146 states and 8422 transitions. [2020-07-21 02:18:38,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 8422 transitions. [2020-07-21 02:18:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 02:18:38,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:38,151 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] [2020-07-21 02:18:38,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:38,366 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1276972281, now seen corresponding path program 1 times [2020-07-21 02:18:38,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:38,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012846315] [2020-07-21 02:18:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:38,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:38,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:39,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:39,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012846315] [2020-07-21 02:18:39,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:39,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:39,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337483976] [2020-07-21 02:18:39,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:39,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:39,008 INFO L87 Difference]: Start difference. First operand 5146 states and 8422 transitions. Second operand 4 states. [2020-07-21 02:18:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:39,561 INFO L93 Difference]: Finished difference Result 12288 states and 20302 transitions. [2020-07-21 02:18:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:39,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-07-21 02:18:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:39,598 INFO L225 Difference]: With dead ends: 12288 [2020-07-21 02:18:39,598 INFO L226 Difference]: Without dead ends: 6220 [2020-07-21 02:18:39,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2020-07-21 02:18:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 6218. [2020-07-21 02:18:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6218 states. [2020-07-21 02:18:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 10239 transitions. [2020-07-21 02:18:40,034 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 10239 transitions. Word has length 471 [2020-07-21 02:18:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:40,035 INFO L479 AbstractCegarLoop]: Abstraction has 6218 states and 10239 transitions. [2020-07-21 02:18:40,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 10239 transitions. [2020-07-21 02:18:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 02:18:40,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:40,058 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] [2020-07-21 02:18:40,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:40,272 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash -583483881, now seen corresponding path program 1 times [2020-07-21 02:18:40,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:40,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006499746] [2020-07-21 02:18:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:40,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:40,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:41,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:41,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006499746] [2020-07-21 02:18:41,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:41,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:41,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845218390] [2020-07-21 02:18:41,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:41,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:41,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:41,326 INFO L87 Difference]: Start difference. First operand 6218 states and 10239 transitions. Second operand 3 states. [2020-07-21 02:18:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:41,821 INFO L93 Difference]: Finished difference Result 18175 states and 29892 transitions. [2020-07-21 02:18:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:41,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-21 02:18:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:41,853 INFO L225 Difference]: With dead ends: 18175 [2020-07-21 02:18:41,853 INFO L226 Difference]: Without dead ends: 12333 [2020-07-21 02:18:41,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12333 states. [2020-07-21 02:18:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12333 to 12331. [2020-07-21 02:18:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12331 states. [2020-07-21 02:18:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12331 states to 12331 states and 20233 transitions. [2020-07-21 02:18:42,505 INFO L78 Accepts]: Start accepts. Automaton has 12331 states and 20233 transitions. Word has length 473 [2020-07-21 02:18:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:42,505 INFO L479 AbstractCegarLoop]: Abstraction has 12331 states and 20233 transitions. [2020-07-21 02:18:42,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 12331 states and 20233 transitions. [2020-07-21 02:18:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 02:18:42,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:42,534 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] [2020-07-21 02:18:42,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:42,750 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1982710364, now seen corresponding path program 1 times [2020-07-21 02:18:42,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:42,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096041904] [2020-07-21 02:18:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:43,178 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:43,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1686 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:43,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:43,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:43,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096041904] [2020-07-21 02:18:43,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:43,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:43,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947984598] [2020-07-21 02:18:43,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:43,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:43,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:43,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:43,370 INFO L87 Difference]: Start difference. First operand 12331 states and 20233 transitions. Second operand 3 states. [2020-07-21 02:18:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:44,121 INFO L93 Difference]: Finished difference Result 36712 states and 60224 transitions. [2020-07-21 02:18:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:44,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-21 02:18:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:44,176 INFO L225 Difference]: With dead ends: 36712 [2020-07-21 02:18:44,177 INFO L226 Difference]: Without dead ends: 24518 [2020-07-21 02:18:44,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2020-07-21 02:18:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 12424. [2020-07-21 02:18:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2020-07-21 02:18:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 20374 transitions. [2020-07-21 02:18:44,803 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 20374 transitions. Word has length 473 [2020-07-21 02:18:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:44,803 INFO L479 AbstractCegarLoop]: Abstraction has 12424 states and 20374 transitions. [2020-07-21 02:18:44,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 20374 transitions. [2020-07-21 02:18:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 02:18:44,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:44,833 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] [2020-07-21 02:18:45,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:45,047 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:45,047 INFO L82 PathProgramCache]: Analyzing trace with hash 674537359, now seen corresponding path program 1 times [2020-07-21 02:18:45,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:45,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777070037] [2020-07-21 02:18:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:45,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:45,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:45,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:45,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777070037] [2020-07-21 02:18:45,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:45,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:45,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298482461] [2020-07-21 02:18:45,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:45,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:45,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:45,694 INFO L87 Difference]: Start difference. First operand 12424 states and 20374 transitions. Second operand 3 states. [2020-07-21 02:18:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:46,680 INFO L93 Difference]: Finished difference Result 36328 states and 59528 transitions. [2020-07-21 02:18:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:47,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 02:18:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:47,408 INFO L225 Difference]: With dead ends: 36328 [2020-07-21 02:18:47,408 INFO L226 Difference]: Without dead ends: 24390 [2020-07-21 02:18:47,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24390 states. [2020-07-21 02:18:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24390 to 12576. [2020-07-21 02:18:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12576 states. [2020-07-21 02:18:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12576 states to 12576 states and 20598 transitions. [2020-07-21 02:18:48,067 INFO L78 Accepts]: Start accepts. Automaton has 12576 states and 20598 transitions. Word has length 474 [2020-07-21 02:18:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:48,068 INFO L479 AbstractCegarLoop]: Abstraction has 12576 states and 20598 transitions. [2020-07-21 02:18:48,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 12576 states and 20598 transitions. [2020-07-21 02:18:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 02:18:48,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:48,097 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] [2020-07-21 02:18:48,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:48,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1511823556, now seen corresponding path program 1 times [2020-07-21 02:18:48,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:48,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606393224] [2020-07-21 02:18:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:48,752 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:48,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:48,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:48,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:48,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606393224] [2020-07-21 02:18:48,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:48,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:48,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403367053] [2020-07-21 02:18:48,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:48,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:48,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:48,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:48,891 INFO L87 Difference]: Start difference. First operand 12576 states and 20598 transitions. Second operand 3 states. [2020-07-21 02:18:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:50,083 INFO L93 Difference]: Finished difference Result 37339 states and 61136 transitions. [2020-07-21 02:18:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:50,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 02:18:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:50,124 INFO L225 Difference]: With dead ends: 37339 [2020-07-21 02:18:50,124 INFO L226 Difference]: Without dead ends: 24954 [2020-07-21 02:18:50,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24954 states. [2020-07-21 02:18:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24954 to 12708. [2020-07-21 02:18:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12708 states. [2020-07-21 02:18:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12708 states to 12708 states and 20769 transitions. [2020-07-21 02:18:50,745 INFO L78 Accepts]: Start accepts. Automaton has 12708 states and 20769 transitions. Word has length 474 [2020-07-21 02:18:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:50,745 INFO L479 AbstractCegarLoop]: Abstraction has 12708 states and 20769 transitions. [2020-07-21 02:18:50,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 12708 states and 20769 transitions. [2020-07-21 02:18:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 02:18:50,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:50,764 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] [2020-07-21 02:18:50,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:50,966 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1489289690, now seen corresponding path program 1 times [2020-07-21 02:18:50,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:50,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065497875] [2020-07-21 02:18:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:51,498 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:51,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:51,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:51,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065497875] [2020-07-21 02:18:51,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:51,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:51,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644857431] [2020-07-21 02:18:51,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:51,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:51,819 INFO L87 Difference]: Start difference. First operand 12708 states and 20769 transitions. Second operand 3 states. [2020-07-21 02:18:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:52,537 INFO L93 Difference]: Finished difference Result 35786 states and 58360 transitions. [2020-07-21 02:18:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:52,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 02:18:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:52,577 INFO L225 Difference]: With dead ends: 35786 [2020-07-21 02:18:52,578 INFO L226 Difference]: Without dead ends: 24622 [2020-07-21 02:18:52,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2020-07-21 02:18:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 24620. [2020-07-21 02:18:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24620 states. [2020-07-21 02:18:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24620 states to 24620 states and 40078 transitions. [2020-07-21 02:18:53,435 INFO L78 Accepts]: Start accepts. Automaton has 24620 states and 40078 transitions. Word has length 475 [2020-07-21 02:18:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:53,435 INFO L479 AbstractCegarLoop]: Abstraction has 24620 states and 40078 transitions. [2020-07-21 02:18:53,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 24620 states and 40078 transitions. [2020-07-21 02:18:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 02:18:53,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:53,457 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] [2020-07-21 02:18:53,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:53,663 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:53,664 INFO L82 PathProgramCache]: Analyzing trace with hash -795440966, now seen corresponding path program 1 times [2020-07-21 02:18:53,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:53,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452564806] [2020-07-21 02:18:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:54,115 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:54,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:54,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452564806] [2020-07-21 02:18:54,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:54,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:54,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092779134] [2020-07-21 02:18:54,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:54,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:54,265 INFO L87 Difference]: Start difference. First operand 24620 states and 40078 transitions. Second operand 3 states. [2020-07-21 02:18:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:55,618 INFO L93 Difference]: Finished difference Result 71588 states and 116578 transitions. [2020-07-21 02:18:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:55,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2020-07-21 02:18:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:55,678 INFO L225 Difference]: With dead ends: 71588 [2020-07-21 02:18:55,679 INFO L226 Difference]: Without dead ends: 48142 [2020-07-21 02:18:55,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48142 states. [2020-07-21 02:18:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48142 to 24988. [2020-07-21 02:18:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24988 states. [2020-07-21 02:18:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24988 states to 24988 states and 40618 transitions. [2020-07-21 02:18:57,608 INFO L78 Accepts]: Start accepts. Automaton has 24988 states and 40618 transitions. Word has length 477 [2020-07-21 02:18:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:57,608 INFO L479 AbstractCegarLoop]: Abstraction has 24988 states and 40618 transitions. [2020-07-21 02:18:57,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24988 states and 40618 transitions. [2020-07-21 02:18:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 02:18:57,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:57,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:57,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:57,844 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1230604503, now seen corresponding path program 1 times [2020-07-21 02:18:57,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:57,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874528900] [2020-07-21 02:18:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:58,297 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:58,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:58,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874528900] [2020-07-21 02:18:58,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:58,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:58,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925113624] [2020-07-21 02:18:58,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:58,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:58,422 INFO L87 Difference]: Start difference. First operand 24988 states and 40618 transitions. Second operand 4 states. [2020-07-21 02:18:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:59,786 INFO L93 Difference]: Finished difference Result 60174 states and 98446 transitions. [2020-07-21 02:18:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:59,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-21 02:18:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:59,829 INFO L225 Difference]: With dead ends: 60174 [2020-07-21 02:18:59,830 INFO L226 Difference]: Without dead ends: 31636 [2020-07-21 02:18:59,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31636 states. [2020-07-21 02:19:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31636 to 31634. [2020-07-21 02:19:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31634 states. [2020-07-21 02:19:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31634 states to 31634 states and 51612 transitions. [2020-07-21 02:19:01,191 INFO L78 Accepts]: Start accepts. Automaton has 31634 states and 51612 transitions. Word has length 477 [2020-07-21 02:19:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:01,192 INFO L479 AbstractCegarLoop]: Abstraction has 31634 states and 51612 transitions. [2020-07-21 02:19:01,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 31634 states and 51612 transitions. [2020-07-21 02:19:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 02:19:01,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:01,229 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] [2020-07-21 02:19:01,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:01,443 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1961362072, now seen corresponding path program 1 times [2020-07-21 02:19:01,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:01,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176221689] [2020-07-21 02:19:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:01,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:01,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:02,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:02,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176221689] [2020-07-21 02:19:02,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:02,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:02,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709098003] [2020-07-21 02:19:02,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:02,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:02,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:02,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:02,013 INFO L87 Difference]: Start difference. First operand 31634 states and 51612 transitions. Second operand 3 states. [2020-07-21 02:19:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:04,549 INFO L93 Difference]: Finished difference Result 88340 states and 143859 transitions. [2020-07-21 02:19:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:04,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2020-07-21 02:19:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:04,616 INFO L225 Difference]: With dead ends: 88340 [2020-07-21 02:19:04,616 INFO L226 Difference]: Without dead ends: 56970 [2020-07-21 02:19:04,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56970 states. [2020-07-21 02:19:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56970 to 31129. [2020-07-21 02:19:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31129 states. [2020-07-21 02:19:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31129 states to 31129 states and 50789 transitions. [2020-07-21 02:19:06,045 INFO L78 Accepts]: Start accepts. Automaton has 31129 states and 50789 transitions. Word has length 477 [2020-07-21 02:19:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:06,045 INFO L479 AbstractCegarLoop]: Abstraction has 31129 states and 50789 transitions. [2020-07-21 02:19:06,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 31129 states and 50789 transitions. [2020-07-21 02:19:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 02:19:06,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:06,069 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] [2020-07-21 02:19:06,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:06,270 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash 834501377, now seen corresponding path program 1 times [2020-07-21 02:19:06,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:06,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269960307] [2020-07-21 02:19:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:06,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:06,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:07,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:07,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269960307] [2020-07-21 02:19:07,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:07,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:19:07,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572284126] [2020-07-21 02:19:07,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:19:07,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:19:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:07,239 INFO L87 Difference]: Start difference. First operand 31129 states and 50789 transitions. Second operand 5 states. [2020-07-21 02:19:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:09,686 INFO L93 Difference]: Finished difference Result 43555 states and 69808 transitions. [2020-07-21 02:19:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:19:09,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-21 02:19:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:09,732 INFO L225 Difference]: With dead ends: 43555 [2020-07-21 02:19:09,733 INFO L226 Difference]: Without dead ends: 31129 [2020-07-21 02:19:09,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:19:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31129 states. [2020-07-21 02:19:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31129 to 31129. [2020-07-21 02:19:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31129 states. [2020-07-21 02:19:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31129 states to 31129 states and 50495 transitions. [2020-07-21 02:19:11,143 INFO L78 Accepts]: Start accepts. Automaton has 31129 states and 50495 transitions. Word has length 479 [2020-07-21 02:19:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:11,144 INFO L479 AbstractCegarLoop]: Abstraction has 31129 states and 50495 transitions. [2020-07-21 02:19:11,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:19:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 31129 states and 50495 transitions. [2020-07-21 02:19:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 02:19:11,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:11,169 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] [2020-07-21 02:19:11,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:11,375 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1425980284, now seen corresponding path program 1 times [2020-07-21 02:19:11,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:11,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3393573] [2020-07-21 02:19:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:11,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:12,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:12,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3393573] [2020-07-21 02:19:12,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:12,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:12,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668117201] [2020-07-21 02:19:12,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:12,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:12,114 INFO L87 Difference]: Start difference. First operand 31129 states and 50495 transitions. Second operand 4 states. [2020-07-21 02:19:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:14,618 INFO L93 Difference]: Finished difference Result 88172 states and 142991 transitions. [2020-07-21 02:19:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:14,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 02:19:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:14,680 INFO L225 Difference]: With dead ends: 88172 [2020-07-21 02:19:14,681 INFO L226 Difference]: Without dead ends: 59654 [2020-07-21 02:19:14,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59654 states. [2020-07-21 02:19:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59654 to 59652. [2020-07-21 02:19:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59652 states. [2020-07-21 02:19:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59652 states to 59652 states and 96356 transitions. [2020-07-21 02:19:18,337 INFO L78 Accepts]: Start accepts. Automaton has 59652 states and 96356 transitions. Word has length 479 [2020-07-21 02:19:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:18,338 INFO L479 AbstractCegarLoop]: Abstraction has 59652 states and 96356 transitions. [2020-07-21 02:19:18,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 59652 states and 96356 transitions. [2020-07-21 02:19:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 02:19:18,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:18,387 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] [2020-07-21 02:19:18,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:18,588 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -854781687, now seen corresponding path program 1 times [2020-07-21 02:19:18,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:18,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057324745] [2020-07-21 02:19:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:19,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:19,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:19:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:19,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:19,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057324745] [2020-07-21 02:19:19,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:19,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:19,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066945867] [2020-07-21 02:19:19,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:19,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:19,383 INFO L87 Difference]: Start difference. First operand 59652 states and 96356 transitions. Second operand 4 states. [2020-07-21 02:19:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:24,122 INFO L93 Difference]: Finished difference Result 170677 states and 274842 transitions. [2020-07-21 02:19:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:24,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 02:19:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:24,240 INFO L225 Difference]: With dead ends: 170677 [2020-07-21 02:19:24,240 INFO L226 Difference]: Without dead ends: 118723 [2020-07-21 02:19:24,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118723 states. [2020-07-21 02:19:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118723 to 68641. [2020-07-21 02:19:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68641 states. [2020-07-21 02:19:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68641 states to 68641 states and 111852 transitions. [2020-07-21 02:19:29,453 INFO L78 Accepts]: Start accepts. Automaton has 68641 states and 111852 transitions. Word has length 479 [2020-07-21 02:19:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:29,453 INFO L479 AbstractCegarLoop]: Abstraction has 68641 states and 111852 transitions. [2020-07-21 02:19:29,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 68641 states and 111852 transitions. [2020-07-21 02:19:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 02:19:29,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:29,508 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] [2020-07-21 02:19:29,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:29,722 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -568136698, now seen corresponding path program 1 times [2020-07-21 02:19:29,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:29,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303134846] [2020-07-21 02:19:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:30,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:30,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:30,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:30,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:30,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303134846] [2020-07-21 02:19:30,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:30,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:30,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795869320] [2020-07-21 02:19:30,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:30,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:30,439 INFO L87 Difference]: Start difference. First operand 68641 states and 111852 transitions. Second operand 3 states. [2020-07-21 02:19:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:37,834 INFO L93 Difference]: Finished difference Result 191930 states and 312079 transitions. [2020-07-21 02:19:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:37,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 02:19:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:37,965 INFO L225 Difference]: With dead ends: 191930 [2020-07-21 02:19:37,966 INFO L226 Difference]: Without dead ends: 132188 [2020-07-21 02:19:38,013 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 [2020-07-21 02:19:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132188 states. [2020-07-21 02:19:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132188 to 132186. [2020-07-21 02:19:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132186 states. [2020-07-21 02:19:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132186 states to 132186 states and 214435 transitions. [2020-07-21 02:19:44,474 INFO L78 Accepts]: Start accepts. Automaton has 132186 states and 214435 transitions. Word has length 479 [2020-07-21 02:19:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:44,474 INFO L479 AbstractCegarLoop]: Abstraction has 132186 states and 214435 transitions. [2020-07-21 02:19:44,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 132186 states and 214435 transitions. [2020-07-21 02:19:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 02:19:44,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:44,582 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] [2020-07-21 02:19:44,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:44,783 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2038867081, now seen corresponding path program 1 times [2020-07-21 02:19:44,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:44,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943745219] [2020-07-21 02:19:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:45,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:19:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:45,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:45,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943745219] [2020-07-21 02:19:45,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:45,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:45,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108064170] [2020-07-21 02:19:45,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:45,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:45,361 INFO L87 Difference]: Start difference. First operand 132186 states and 214435 transitions. Second operand 4 states. [2020-07-21 02:19:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:57,707 INFO L93 Difference]: Finished difference Result 348890 states and 561834 transitions. [2020-07-21 02:19:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:57,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 02:19:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:57,942 INFO L225 Difference]: With dead ends: 348890 [2020-07-21 02:19:57,942 INFO L226 Difference]: Without dead ends: 242744 [2020-07-21 02:19:58,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242744 states. [2020-07-21 02:20:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242744 to 149468. [2020-07-21 02:20:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149468 states. [2020-07-21 02:20:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149468 states to 149468 states and 243616 transitions. [2020-07-21 02:20:10,156 INFO L78 Accepts]: Start accepts. Automaton has 149468 states and 243616 transitions. Word has length 479 [2020-07-21 02:20:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:10,156 INFO L479 AbstractCegarLoop]: Abstraction has 149468 states and 243616 transitions. [2020-07-21 02:20:10,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 149468 states and 243616 transitions. [2020-07-21 02:20:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 02:20:10,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:10,355 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (18)] Forcibly destroying the process [2020-07-21 02:20:10,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:10,975 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash 271964941, now seen corresponding path program 1 times [2020-07-21 02:20:10,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:10,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353784237] [2020-07-21 02:20:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:11,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:11,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:11,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:11,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353784237] [2020-07-21 02:20:11,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:11,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:11,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542839305] [2020-07-21 02:20:11,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:11,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:11,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:11,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:11,592 INFO L87 Difference]: Start difference. First operand 149468 states and 243616 transitions. Second operand 4 states. [2020-07-21 02:20:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:27,150 INFO L93 Difference]: Finished difference Result 368247 states and 601159 transitions. [2020-07-21 02:20:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:27,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-21 02:20:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:27,378 INFO L225 Difference]: With dead ends: 368247 [2020-07-21 02:20:27,378 INFO L226 Difference]: Without dead ends: 195249 [2020-07-21 02:20:27,492 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 [2020-07-21 02:20:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195249 states. [2020-07-21 02:20:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195249 to 195247. [2020-07-21 02:20:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195247 states. [2020-07-21 02:20:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195247 states to 195247 states and 317211 transitions. [2020-07-21 02:20:37,880 INFO L78 Accepts]: Start accepts. Automaton has 195247 states and 317211 transitions. Word has length 481 [2020-07-21 02:20:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:37,881 INFO L479 AbstractCegarLoop]: Abstraction has 195247 states and 317211 transitions. [2020-07-21 02:20:37,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 195247 states and 317211 transitions. [2020-07-21 02:20:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 02:20:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:38,043 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] [2020-07-21 02:20:38,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:38,244 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 827931104, now seen corresponding path program 1 times [2020-07-21 02:20:38,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:38,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31933324] [2020-07-21 02:20:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:38,743 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:38,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:38,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:38,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31933324] [2020-07-21 02:20:38,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:38,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:38,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135343574] [2020-07-21 02:20:38,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:38,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:38,939 INFO L87 Difference]: Start difference. First operand 195247 states and 317211 transitions. Second operand 3 states. [2020-07-21 02:21:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:00,855 INFO L93 Difference]: Finished difference Result 512962 states and 828102 transitions. [2020-07-21 02:21:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:00,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 02:21:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:01,259 INFO L225 Difference]: With dead ends: 512962 [2020-07-21 02:21:01,259 INFO L226 Difference]: Without dead ends: 359040 [2020-07-21 02:21:01,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359040 states. [2020-07-21 02:21:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359040 to 359038. [2020-07-21 02:21:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359038 states. [2020-07-21 02:21:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359038 states to 359038 states and 578685 transitions. [2020-07-21 02:21:27,138 INFO L78 Accepts]: Start accepts. Automaton has 359038 states and 578685 transitions. Word has length 481 [2020-07-21 02:21:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:27,139 INFO L479 AbstractCegarLoop]: Abstraction has 359038 states and 578685 transitions. [2020-07-21 02:21:27,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 359038 states and 578685 transitions. [2020-07-21 02:21:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 02:21:28,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:28,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:28,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:28,307 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1675558975, now seen corresponding path program 1 times [2020-07-21 02:21:28,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:28,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713036674] [2020-07-21 02:21:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:28,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:28,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:28,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713036674] [2020-07-21 02:21:28,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:28,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:28,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710499199] [2020-07-21 02:21:28,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:28,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:28,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:28,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:28,864 INFO L87 Difference]: Start difference. First operand 359038 states and 578685 transitions. Second operand 3 states. [2020-07-21 02:22:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:10,848 INFO L93 Difference]: Finished difference Result 959916 states and 1540707 transitions. [2020-07-21 02:22:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:22:10,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 02:22:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:11,586 INFO L225 Difference]: With dead ends: 959916 [2020-07-21 02:22:11,587 INFO L226 Difference]: Without dead ends: 607335 [2020-07-21 02:22:11,850 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 [2020-07-21 02:22:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607335 states. [2020-07-21 02:22:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607335 to 344097. [2020-07-21 02:22:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344097 states. [2020-07-21 02:22:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344097 states to 344097 states and 553594 transitions. [2020-07-21 02:22:43,002 INFO L78 Accepts]: Start accepts. Automaton has 344097 states and 553594 transitions. Word has length 484 [2020-07-21 02:22:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:43,002 INFO L479 AbstractCegarLoop]: Abstraction has 344097 states and 553594 transitions. [2020-07-21 02:22:43,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 344097 states and 553594 transitions. [2020-07-21 02:22:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 02:22:43,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:43,325 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] [2020-07-21 02:22:43,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:43,525 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:43,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1740988036, now seen corresponding path program 1 times [2020-07-21 02:22:43,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:43,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107871709] [2020-07-21 02:22:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:43,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:43,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:22:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:22:44,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:44,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107871709] [2020-07-21 02:22:44,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:44,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:22:44,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678905880] [2020-07-21 02:22:44,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:22:44,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:22:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:44,636 INFO L87 Difference]: Start difference. First operand 344097 states and 553594 transitions. Second operand 3 states. [2020-07-21 02:23:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:28,183 INFO L93 Difference]: Finished difference Result 995469 states and 1596840 transitions. [2020-07-21 02:23:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:28,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 02:23:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:29,070 INFO L225 Difference]: With dead ends: 995469 [2020-07-21 02:23:29,070 INFO L226 Difference]: Without dead ends: 667398 [2020-07-21 02:23:29,343 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 [2020-07-21 02:23:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667398 states. [2020-07-21 02:24:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667398 to 349565. [2020-07-21 02:24:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349565 states. [2020-07-21 02:24:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349565 states to 349565 states and 560960 transitions. [2020-07-21 02:24:05,741 INFO L78 Accepts]: Start accepts. Automaton has 349565 states and 560960 transitions. Word has length 485 [2020-07-21 02:24:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:05,741 INFO L479 AbstractCegarLoop]: Abstraction has 349565 states and 560960 transitions. [2020-07-21 02:24:05,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 349565 states and 560960 transitions. [2020-07-21 02:24:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 02:24:06,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:06,043 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] [2020-07-21 02:24:06,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:06,244 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2125731354, now seen corresponding path program 1 times [2020-07-21 02:24:06,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:06,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210854765] [2020-07-21 02:24:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:06,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:06,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:06,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210854765] [2020-07-21 02:24:06,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:06,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:06,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279072487] [2020-07-21 02:24:06,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:06,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:06,784 INFO L87 Difference]: Start difference. First operand 349565 states and 560960 transitions. Second operand 3 states. [2020-07-21 02:24:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:52,977 INFO L93 Difference]: Finished difference Result 959865 states and 1534787 transitions. [2020-07-21 02:24:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:52,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 02:24:52,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:53,796 INFO L225 Difference]: With dead ends: 959865 [2020-07-21 02:24:53,797 INFO L226 Difference]: Without dead ends: 655069 [2020-07-21 02:24:54,052 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 [2020-07-21 02:24:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655069 states. [2020-07-21 02:25:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655069 to 359223. [2020-07-21 02:25:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359223 states. [2020-07-21 02:25:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359223 states to 359223 states and 573817 transitions. [2020-07-21 02:25:31,239 INFO L78 Accepts]: Start accepts. Automaton has 359223 states and 573817 transitions. Word has length 485 [2020-07-21 02:25:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:31,239 INFO L479 AbstractCegarLoop]: Abstraction has 359223 states and 573817 transitions. [2020-07-21 02:25:31,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:25:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 359223 states and 573817 transitions. [2020-07-21 02:25:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 02:25:31,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:31,585 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] [2020-07-21 02:25:31,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:31,799 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1133850919, now seen corresponding path program 1 times [2020-07-21 02:25:31,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:31,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663023456] [2020-07-21 02:25:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:32,243 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:32,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:32,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:32,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:32,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663023456] [2020-07-21 02:25:32,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:32,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:32,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334244021] [2020-07-21 02:25:32,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:32,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:32,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:32,961 INFO L87 Difference]: Start difference. First operand 359223 states and 573817 transitions. Second operand 3 states. [2020-07-21 02:26:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:21,174 INFO L93 Difference]: Finished difference Result 910147 states and 1450362 transitions. [2020-07-21 02:26:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:26:21,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 02:26:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:21,957 INFO L225 Difference]: With dead ends: 910147 [2020-07-21 02:26:21,958 INFO L226 Difference]: Without dead ends: 636022 [2020-07-21 02:26:22,182 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 [2020-07-21 02:26:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636022 states. [2020-07-21 02:27:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636022 to 377428. [2020-07-21 02:27:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377428 states. [2020-07-21 02:27:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377428 states to 377428 states and 600217 transitions. [2020-07-21 02:27:01,450 INFO L78 Accepts]: Start accepts. Automaton has 377428 states and 600217 transitions. Word has length 485 [2020-07-21 02:27:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:01,450 INFO L479 AbstractCegarLoop]: Abstraction has 377428 states and 600217 transitions. [2020-07-21 02:27:01,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 377428 states and 600217 transitions. [2020-07-21 02:27:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:27:02,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:02,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:02,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:02,573 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1652130691, now seen corresponding path program 1 times [2020-07-21 02:27:02,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:02,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283988544] [2020-07-21 02:27:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:03,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:03,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:03,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:03,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283988544] [2020-07-21 02:27:03,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:03,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:03,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50818249] [2020-07-21 02:27:03,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:03,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:03,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:03,121 INFO L87 Difference]: Start difference. First operand 377428 states and 600217 transitions. Second operand 3 states. [2020-07-21 02:27:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:53,950 INFO L93 Difference]: Finished difference Result 922353 states and 1461690 transitions. [2020-07-21 02:27:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:53,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:27:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:54,773 INFO L225 Difference]: With dead ends: 922353 [2020-07-21 02:27:54,773 INFO L226 Difference]: Without dead ends: 646419 [2020-07-21 02:27:55,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646419 states. [2020-07-21 02:28:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646419 to 399121. [2020-07-21 02:28:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399121 states. [2020-07-21 02:28:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399121 states to 399121 states and 626974 transitions. [2020-07-21 02:28:26,701 INFO L78 Accepts]: Start accepts. Automaton has 399121 states and 626974 transitions. Word has length 486 [2020-07-21 02:28:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:26,701 INFO L479 AbstractCegarLoop]: Abstraction has 399121 states and 626974 transitions. [2020-07-21 02:28:26,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 399121 states and 626974 transitions. [2020-07-21 02:28:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:28:27,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:27,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:27,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:27,319 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1981094920, now seen corresponding path program 1 times [2020-07-21 02:28:27,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:27,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964301381] [2020-07-21 02:28:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:28,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:28:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:28,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:28,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964301381] [2020-07-21 02:28:28,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:28,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:28,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712015984] [2020-07-21 02:28:28,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:28,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:28,526 INFO L87 Difference]: Start difference. First operand 399121 states and 626974 transitions. Second operand 4 states. [2020-07-21 02:29:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:23,991 INFO L93 Difference]: Finished difference Result 1017503 states and 1597835 transitions. [2020-07-21 02:29:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:23,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 02:29:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:24,968 INFO L225 Difference]: With dead ends: 1017503 [2020-07-21 02:29:24,968 INFO L226 Difference]: Without dead ends: 714514 [2020-07-21 02:29:25,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714514 states.