/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:27:16,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:27:16,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:27:16,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:27:16,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:27:16,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:27:16,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:27:16,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:27:16,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:27:16,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:27:16,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:27:16,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:27:16,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:27:16,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:27:16,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:27:16,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:27:16,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:27:16,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:27:16,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:27:16,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:27:16,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:27:16,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:27:16,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:27:16,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:27:16,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:27:16,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:27:16,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:27:16,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:27:16,409 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 02:27:16,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:27:16,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:27:16,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:27:16,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:27:16,426 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:27:16,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:27:16,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:27:16,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:27:16,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:27:16,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:27:16,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:27:16,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:27:16,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:27:16,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:27:16,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:27:16,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:27:16,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:27:16,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:27:16,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:27:16,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:27:16,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:27:16,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:27:16,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:27:16,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:27:16,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:27:16,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:27:16,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:16,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:27:16,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:27:16,431 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 02:27:16,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:27:16,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:27:16,732 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:27:16,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:27:16,733 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:27:16,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 02:27:16,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dab31329e/2fcd9c9c443f46c6a9470baa894fee1f/FLAG1cdac687c [2020-07-21 02:27:17,583 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:27:17,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 02:27:17,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dab31329e/2fcd9c9c443f46c6a9470baa894fee1f/FLAG1cdac687c [2020-07-21 02:27:17,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dab31329e/2fcd9c9c443f46c6a9470baa894fee1f [2020-07-21 02:27:17,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:27:17,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:27:17,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:27:17,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:27:17,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:27:17,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:27:17" (1/1) ... [2020-07-21 02:27:17,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:17, skipping insertion in model container [2020-07-21 02:27:17,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:27:17" (1/1) ... [2020-07-21 02:27:17,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:27:17,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:27:19,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:27:19,568 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:27:20,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:27:20,780 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:27:20,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20 WrapperNode [2020-07-21 02:27:20,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:27:20,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:27:20,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:27:20,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:27:20,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:20,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:20,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:20,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:20,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:20,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:21,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (1/1) ... [2020-07-21 02:27:21,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:27:21,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:27:21,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:27:21,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:27:21,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (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 02:27:21,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:27:21,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:27:21,139 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:27:21,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:27:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:27:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:27:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:27:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:27:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:27:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:27:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:27:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:27:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:27:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:27:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:27:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:27:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:27:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:27:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:27:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:27:21,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:27:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:27:25,899 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:27:25,900 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:27:25,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:27:25 BoogieIcfgContainer [2020-07-21 02:27:25,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:27:25,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:27:25,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:27:25,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:27:25,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:27:17" (1/3) ... [2020-07-21 02:27:25,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775cc02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:27:25, skipping insertion in model container [2020-07-21 02:27:25,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:20" (2/3) ... [2020-07-21 02:27:25,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775cc02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:27:25, skipping insertion in model container [2020-07-21 02:27:25,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:27:25" (3/3) ... [2020-07-21 02:27:25,923 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 02:27:25,934 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:27:25,944 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 02:27:25,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 02:27:25,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:27:25,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:27:25,990 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:27:25,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:27:25,991 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:27:25,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:27:25,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:27:25,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:27:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-21 02:27:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 02:27:26,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:26,083 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 02:27:26,083 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-21 02:27:26,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:26,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434709872] [2020-07-21 02:27:26,100 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 02:27:26,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:26,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:26,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:27:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:27,374 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 02:27:27,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:27,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434709872] [2020-07-21 02:27:27,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:27,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:27,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454703845] [2020-07-21 02:27:27,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:27,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:27,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:27,410 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-21 02:27:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:28,008 INFO L93 Difference]: Finished difference Result 4395 states and 7938 transitions. [2020-07-21 02:27:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:27:28,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 02:27:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:28,067 INFO L225 Difference]: With dead ends: 4395 [2020-07-21 02:27:28,067 INFO L226 Difference]: Without dead ends: 2918 [2020-07-21 02:27:28,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-07-21 02:27:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2875. [2020-07-21 02:27:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2020-07-21 02:27:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4738 transitions. [2020-07-21 02:27:28,360 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4738 transitions. Word has length 484 [2020-07-21 02:27:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:28,366 INFO L479 AbstractCegarLoop]: Abstraction has 2875 states and 4738 transitions. [2020-07-21 02:27:28,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:27:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4738 transitions. [2020-07-21 02:27:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:27:28,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:28,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:28,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:28,605 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:28,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2129727600, now seen corresponding path program 1 times [2020-07-21 02:27:28,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:28,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337952029] [2020-07-21 02:27:28,607 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 02:27:29,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:29,369 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 02:27:29,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:29,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337952029] [2020-07-21 02:27:29,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:29,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:29,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031380097] [2020-07-21 02:27:29,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:29,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:29,375 INFO L87 Difference]: Start difference. First operand 2875 states and 4738 transitions. Second operand 3 states. [2020-07-21 02:27:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:29,741 INFO L93 Difference]: Finished difference Result 8315 states and 13660 transitions. [2020-07-21 02:27:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:29,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:27:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:29,775 INFO L225 Difference]: With dead ends: 8315 [2020-07-21 02:27:29,775 INFO L226 Difference]: Without dead ends: 5669 [2020-07-21 02:27:29,786 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 02:27:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2020-07-21 02:27:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 5628. [2020-07-21 02:27:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2020-07-21 02:27:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 9249 transitions. [2020-07-21 02:27:30,060 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 9249 transitions. Word has length 486 [2020-07-21 02:27:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:30,061 INFO L479 AbstractCegarLoop]: Abstraction has 5628 states and 9249 transitions. [2020-07-21 02:27:30,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 9249 transitions. [2020-07-21 02:27:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:27:30,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:30,087 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 02:27:30,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:30,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:30,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1973900800, now seen corresponding path program 1 times [2020-07-21 02:27:30,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:30,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829425445] [2020-07-21 02:27:30,305 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 02:27:30,780 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:30,941 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 02:27:30,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:30,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829425445] [2020-07-21 02:27:30,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:30,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:30,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124853873] [2020-07-21 02:27:30,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:30,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:30,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:30,946 INFO L87 Difference]: Start difference. First operand 5628 states and 9249 transitions. Second operand 3 states. [2020-07-21 02:27:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:31,326 INFO L93 Difference]: Finished difference Result 16628 states and 27284 transitions. [2020-07-21 02:27:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:31,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 02:27:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:31,380 INFO L225 Difference]: With dead ends: 16628 [2020-07-21 02:27:31,380 INFO L226 Difference]: Without dead ends: 11031 [2020-07-21 02:27:31,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11031 states. [2020-07-21 02:27:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11031 to 5654. [2020-07-21 02:27:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5654 states. [2020-07-21 02:27:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 9287 transitions. [2020-07-21 02:27:31,689 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 9287 transitions. Word has length 487 [2020-07-21 02:27:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:31,689 INFO L479 AbstractCegarLoop]: Abstraction has 5654 states and 9287 transitions. [2020-07-21 02:27:31,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 9287 transitions. [2020-07-21 02:27:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 02:27:31,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:31,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:31,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:31,922 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash 950635083, now seen corresponding path program 1 times [2020-07-21 02:27:31,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:31,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50704474] [2020-07-21 02:27:31,926 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 02:27:32,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:27:32,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:32,588 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 02:27:32,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:32,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50704474] [2020-07-21 02:27:32,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:32,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:32,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083023164] [2020-07-21 02:27:32,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:32,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:32,592 INFO L87 Difference]: Start difference. First operand 5654 states and 9287 transitions. Second operand 4 states. [2020-07-21 02:27:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:33,101 INFO L93 Difference]: Finished difference Result 13381 states and 22146 transitions. [2020-07-21 02:27:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:27:33,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 02:27:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:33,152 INFO L225 Difference]: With dead ends: 13381 [2020-07-21 02:27:33,152 INFO L226 Difference]: Without dead ends: 6786 [2020-07-21 02:27:33,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6786 states. [2020-07-21 02:27:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6786 to 6745. [2020-07-21 02:27:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6745 states. [2020-07-21 02:27:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 11131 transitions. [2020-07-21 02:27:33,565 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 11131 transitions. Word has length 488 [2020-07-21 02:27:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:33,566 INFO L479 AbstractCegarLoop]: Abstraction has 6745 states and 11131 transitions. [2020-07-21 02:27:33,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:27:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 11131 transitions. [2020-07-21 02:27:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 02:27:33,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:33,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:33,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:33,811 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:33,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1310792764, now seen corresponding path program 1 times [2020-07-21 02:27:33,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:33,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366419188] [2020-07-21 02:27:33,813 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 02:27:34,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:34,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:34,542 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 02:27:34,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:34,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366419188] [2020-07-21 02:27:34,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:34,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:34,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009135162] [2020-07-21 02:27:34,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:34,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:34,546 INFO L87 Difference]: Start difference. First operand 6745 states and 11131 transitions. Second operand 3 states. [2020-07-21 02:27:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:34,901 INFO L93 Difference]: Finished difference Result 12116 states and 19674 transitions. [2020-07-21 02:27:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:34,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 02:27:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:34,930 INFO L225 Difference]: With dead ends: 12116 [2020-07-21 02:27:34,930 INFO L226 Difference]: Without dead ends: 8615 [2020-07-21 02:27:34,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2020-07-21 02:27:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 7533. [2020-07-21 02:27:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7533 states. [2020-07-21 02:27:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7533 states to 7533 states and 12428 transitions. [2020-07-21 02:27:35,249 INFO L78 Accepts]: Start accepts. Automaton has 7533 states and 12428 transitions. Word has length 490 [2020-07-21 02:27:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:35,249 INFO L479 AbstractCegarLoop]: Abstraction has 7533 states and 12428 transitions. [2020-07-21 02:27:35,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7533 states and 12428 transitions. [2020-07-21 02:27:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 02:27:35,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:35,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:35,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:35,483 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1313216099, now seen corresponding path program 1 times [2020-07-21 02:27:35,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:35,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893389884] [2020-07-21 02:27:35,484 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 02:27:35,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2145 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:35,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:36,224 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 02:27:36,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:36,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893389884] [2020-07-21 02:27:36,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:36,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:36,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025421820] [2020-07-21 02:27:36,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:36,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:36,227 INFO L87 Difference]: Start difference. First operand 7533 states and 12428 transitions. Second operand 3 states. [2020-07-21 02:27:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:36,824 INFO L93 Difference]: Finished difference Result 22076 states and 36379 transitions. [2020-07-21 02:27:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:36,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 02:27:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:36,858 INFO L225 Difference]: With dead ends: 22076 [2020-07-21 02:27:36,859 INFO L226 Difference]: Without dead ends: 14919 [2020-07-21 02:27:36,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14919 states. [2020-07-21 02:27:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14919 to 14849. [2020-07-21 02:27:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14849 states. [2020-07-21 02:27:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14849 states to 14849 states and 24419 transitions. [2020-07-21 02:27:37,388 INFO L78 Accepts]: Start accepts. Automaton has 14849 states and 24419 transitions. Word has length 490 [2020-07-21 02:27:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:37,389 INFO L479 AbstractCegarLoop]: Abstraction has 14849 states and 24419 transitions. [2020-07-21 02:27:37,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 14849 states and 24419 transitions. [2020-07-21 02:27:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 02:27:37,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:37,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:37,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:37,637 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:37,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1002481672, now seen corresponding path program 1 times [2020-07-21 02:27:37,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:37,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161656052] [2020-07-21 02:27:37,639 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 02:27:38,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:38,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:38,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:38,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:38,374 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 02:27:38,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:38,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161656052] [2020-07-21 02:27:38,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:38,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:38,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905529569] [2020-07-21 02:27:38,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:38,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:38,377 INFO L87 Difference]: Start difference. First operand 14849 states and 24419 transitions. Second operand 3 states. [2020-07-21 02:27:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:38,987 INFO L93 Difference]: Finished difference Result 44266 states and 72782 transitions. [2020-07-21 02:27:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:38,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 02:27:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:39,060 INFO L225 Difference]: With dead ends: 44266 [2020-07-21 02:27:39,060 INFO L226 Difference]: Without dead ends: 29554 [2020-07-21 02:27:39,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29554 states. [2020-07-21 02:27:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29554 to 14942. [2020-07-21 02:27:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14942 states. [2020-07-21 02:27:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14942 states to 14942 states and 24560 transitions. [2020-07-21 02:27:40,698 INFO L78 Accepts]: Start accepts. Automaton has 14942 states and 24560 transitions. Word has length 490 [2020-07-21 02:27:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:40,698 INFO L479 AbstractCegarLoop]: Abstraction has 14942 states and 24560 transitions. [2020-07-21 02:27:40,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 14942 states and 24560 transitions. [2020-07-21 02:27:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 02:27:40,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:40,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:40,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:40,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:40,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1327908555, now seen corresponding path program 1 times [2020-07-21 02:27:40,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:40,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002908198] [2020-07-21 02:27:40,940 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 02:27:41,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:41,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:41,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:41,431 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 02:27:41,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:41,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002908198] [2020-07-21 02:27:41,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:41,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:41,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971502646] [2020-07-21 02:27:41,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:41,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:41,434 INFO L87 Difference]: Start difference. First operand 14942 states and 24560 transitions. Second operand 3 states. [2020-07-21 02:27:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:42,224 INFO L93 Difference]: Finished difference Result 43882 states and 72086 transitions. [2020-07-21 02:27:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:42,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 02:27:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:42,283 INFO L225 Difference]: With dead ends: 43882 [2020-07-21 02:27:42,283 INFO L226 Difference]: Without dead ends: 29426 [2020-07-21 02:27:42,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29426 states. [2020-07-21 02:27:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29426 to 15094. [2020-07-21 02:27:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15094 states. [2020-07-21 02:27:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15094 states to 15094 states and 24784 transitions. [2020-07-21 02:27:42,958 INFO L78 Accepts]: Start accepts. Automaton has 15094 states and 24784 transitions. Word has length 491 [2020-07-21 02:27:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:42,958 INFO L479 AbstractCegarLoop]: Abstraction has 15094 states and 24784 transitions. [2020-07-21 02:27:42,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15094 states and 24784 transitions. [2020-07-21 02:27:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 02:27:42,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:42,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:43,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:43,178 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:43,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1593985752, now seen corresponding path program 1 times [2020-07-21 02:27:43,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:43,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650616094] [2020-07-21 02:27:43,180 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 02:27:43,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:43,736 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-07-21 02:27:43,867 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 02:27:43,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:43,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650616094] [2020-07-21 02:27:43,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:43,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:43,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874787574] [2020-07-21 02:27:43,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:43,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:43,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:43,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:43,879 INFO L87 Difference]: Start difference. First operand 15094 states and 24784 transitions. Second operand 3 states. [2020-07-21 02:27:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:45,001 INFO L93 Difference]: Finished difference Result 44893 states and 73694 transitions. [2020-07-21 02:27:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:45,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 02:27:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:45,055 INFO L225 Difference]: With dead ends: 44893 [2020-07-21 02:27:45,056 INFO L226 Difference]: Without dead ends: 29990 [2020-07-21 02:27:45,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:45,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29990 states. [2020-07-21 02:27:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29990 to 15226. [2020-07-21 02:27:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15226 states. [2020-07-21 02:27:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15226 states to 15226 states and 24955 transitions. [2020-07-21 02:27:45,981 INFO L78 Accepts]: Start accepts. Automaton has 15226 states and 24955 transitions. Word has length 491 [2020-07-21 02:27:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:45,982 INFO L479 AbstractCegarLoop]: Abstraction has 15226 states and 24955 transitions. [2020-07-21 02:27:45,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 15226 states and 24955 transitions. [2020-07-21 02:27:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 02:27:45,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:45,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:46,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:46,198 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2114482470, now seen corresponding path program 1 times [2020-07-21 02:27:46,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:46,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062126888] [2020-07-21 02:27:46,201 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 02:27:46,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:46,833 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 02:27:46,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:46,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062126888] [2020-07-21 02:27:46,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:46,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:46,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069228769] [2020-07-21 02:27:46,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:46,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:46,836 INFO L87 Difference]: Start difference. First operand 15226 states and 24955 transitions. Second operand 3 states. [2020-07-21 02:27:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:47,766 INFO L93 Difference]: Finished difference Result 43259 states and 70772 transitions. [2020-07-21 02:27:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:47,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 02:27:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:47,812 INFO L225 Difference]: With dead ends: 43259 [2020-07-21 02:27:47,812 INFO L226 Difference]: Without dead ends: 29577 [2020-07-21 02:27:47,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29577 states. [2020-07-21 02:27:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29577 to 29538. [2020-07-21 02:27:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29538 states. [2020-07-21 02:27:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29538 states to 29538 states and 48233 transitions. [2020-07-21 02:27:48,853 INFO L78 Accepts]: Start accepts. Automaton has 29538 states and 48233 transitions. Word has length 492 [2020-07-21 02:27:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:48,854 INFO L479 AbstractCegarLoop]: Abstraction has 29538 states and 48233 transitions. [2020-07-21 02:27:48,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29538 states and 48233 transitions. [2020-07-21 02:27:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 02:27:49,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:49,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:49,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:49,230 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash -750161328, now seen corresponding path program 1 times [2020-07-21 02:27:49,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:49,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210360201] [2020-07-21 02:27:49,232 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 02:27:49,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:49,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:49,798 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 02:27:49,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:49,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210360201] [2020-07-21 02:27:49,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:49,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:49,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212703211] [2020-07-21 02:27:49,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:49,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:49,800 INFO L87 Difference]: Start difference. First operand 29538 states and 48233 transitions. Second operand 3 states. [2020-07-21 02:27:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:51,715 INFO L93 Difference]: Finished difference Result 54960 states and 89018 transitions. [2020-07-21 02:27:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:51,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 02:27:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:51,768 INFO L225 Difference]: With dead ends: 54960 [2020-07-21 02:27:51,768 INFO L226 Difference]: Without dead ends: 39060 [2020-07-21 02:27:51,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39060 states. [2020-07-21 02:27:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39060 to 35074. [2020-07-21 02:27:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35074 states. [2020-07-21 02:27:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35074 states to 35074 states and 57361 transitions. [2020-07-21 02:27:52,952 INFO L78 Accepts]: Start accepts. Automaton has 35074 states and 57361 transitions. Word has length 492 [2020-07-21 02:27:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:52,952 INFO L479 AbstractCegarLoop]: Abstraction has 35074 states and 57361 transitions. [2020-07-21 02:27:52,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35074 states and 57361 transitions. [2020-07-21 02:27:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 02:27:52,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:52,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:53,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:53,199 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1853130275, now seen corresponding path program 1 times [2020-07-21 02:27:53,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:53,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232538474] [2020-07-21 02:27:53,201 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 02:27:53,693 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:27:53,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:54,128 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 02:27:54,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:54,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232538474] [2020-07-21 02:27:54,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:54,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:27:54,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769808607] [2020-07-21 02:27:54,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:27:54,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:54,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:27:54,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:54,131 INFO L87 Difference]: Start difference. First operand 35074 states and 57361 transitions. Second operand 5 states. [2020-07-21 02:27:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:56,449 INFO L93 Difference]: Finished difference Result 57146 states and 92593 transitions. [2020-07-21 02:27:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:27:56,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-21 02:27:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:56,493 INFO L225 Difference]: With dead ends: 57146 [2020-07-21 02:27:56,493 INFO L226 Difference]: Without dead ends: 35074 [2020-07-21 02:27:56,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:27:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35074 states. [2020-07-21 02:27:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35074 to 35074. [2020-07-21 02:27:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35074 states. [2020-07-21 02:27:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35074 states to 35074 states and 57053 transitions. [2020-07-21 02:27:57,943 INFO L78 Accepts]: Start accepts. Automaton has 35074 states and 57053 transitions. Word has length 493 [2020-07-21 02:27:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:57,943 INFO L479 AbstractCegarLoop]: Abstraction has 35074 states and 57053 transitions. [2020-07-21 02:27:57,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:27:57,944 INFO L276 IsEmpty]: Start isEmpty. Operand 35074 states and 57053 transitions. [2020-07-21 02:27:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 02:27:57,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:57,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:58,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:58,167 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash -696912808, now seen corresponding path program 1 times [2020-07-21 02:27:58,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:58,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317480123] [2020-07-21 02:27:58,170 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 02:27:58,640 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:58,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:58,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:27:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:58,867 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 02:27:58,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:58,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317480123] [2020-07-21 02:27:58,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:58,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:58,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126541499] [2020-07-21 02:27:58,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:58,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:58,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:58,869 INFO L87 Difference]: Start difference. First operand 35074 states and 57053 transitions. Second operand 4 states. [2020-07-21 02:28:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:02,857 INFO L93 Difference]: Finished difference Result 103571 states and 168640 transitions. [2020-07-21 02:28:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:02,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 02:28:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:02,942 INFO L225 Difference]: With dead ends: 103571 [2020-07-21 02:28:02,942 INFO L226 Difference]: Without dead ends: 68938 [2020-07-21 02:28:02,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:28:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68938 states. [2020-07-21 02:28:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68938 to 68864. [2020-07-21 02:28:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68864 states. [2020-07-21 02:28:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68864 states to 68864 states and 111671 transitions. [2020-07-21 02:28:05,703 INFO L78 Accepts]: Start accepts. Automaton has 68864 states and 111671 transitions. Word has length 493 [2020-07-21 02:28:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:05,704 INFO L479 AbstractCegarLoop]: Abstraction has 68864 states and 111671 transitions. [2020-07-21 02:28:05,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 68864 states and 111671 transitions. [2020-07-21 02:28:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 02:28:05,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:05,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:05,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:05,953 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash -828565192, now seen corresponding path program 1 times [2020-07-21 02:28:05,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:05,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703693007] [2020-07-21 02:28:05,955 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 02:28:06,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:06,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:06,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:06,488 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 02:28:06,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:06,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703693007] [2020-07-21 02:28:06,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:06,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:06,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96450950] [2020-07-21 02:28:06,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:06,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:06,490 INFO L87 Difference]: Start difference. First operand 68864 states and 111671 transitions. Second operand 3 states. [2020-07-21 02:28:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:13,183 INFO L93 Difference]: Finished difference Result 198637 states and 321633 transitions. [2020-07-21 02:28:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:13,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 02:28:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:13,325 INFO L225 Difference]: With dead ends: 198637 [2020-07-21 02:28:13,326 INFO L226 Difference]: Without dead ends: 129999 [2020-07-21 02:28:13,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129999 states. [2020-07-21 02:28:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129999 to 68347. [2020-07-21 02:28:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68347 states. [2020-07-21 02:28:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68347 states to 68347 states and 110841 transitions. [2020-07-21 02:28:16,484 INFO L78 Accepts]: Start accepts. Automaton has 68347 states and 110841 transitions. Word has length 494 [2020-07-21 02:28:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:16,485 INFO L479 AbstractCegarLoop]: Abstraction has 68347 states and 110841 transitions. [2020-07-21 02:28:16,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 68347 states and 110841 transitions. [2020-07-21 02:28:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:28:16,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:16,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:16,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:16,727 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash 396726676, now seen corresponding path program 1 times [2020-07-21 02:28:16,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:16,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767539854] [2020-07-21 02:28:16,729 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 02:28:17,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:17,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:17,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:17,369 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 02:28:17,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:17,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767539854] [2020-07-21 02:28:17,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:17,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:17,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253728772] [2020-07-21 02:28:17,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:17,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:17,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:17,371 INFO L87 Difference]: Start difference. First operand 68347 states and 110841 transitions. Second operand 3 states. [2020-07-21 02:28:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:24,365 INFO L93 Difference]: Finished difference Result 198396 states and 321355 transitions. [2020-07-21 02:28:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:24,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:28:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:24,530 INFO L225 Difference]: With dead ends: 198396 [2020-07-21 02:28:24,530 INFO L226 Difference]: Without dead ends: 133450 [2020-07-21 02:28:24,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133450 states. [2020-07-21 02:28:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133450 to 133431. [2020-07-21 02:28:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133431 states. [2020-07-21 02:28:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133431 states to 133431 states and 215459 transitions. [2020-07-21 02:28:30,387 INFO L78 Accepts]: Start accepts. Automaton has 133431 states and 215459 transitions. Word has length 495 [2020-07-21 02:28:30,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:30,388 INFO L479 AbstractCegarLoop]: Abstraction has 133431 states and 215459 transitions. [2020-07-21 02:28:30,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 133431 states and 215459 transitions. [2020-07-21 02:28:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:28:30,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:30,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:30,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:30,681 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2096751919, now seen corresponding path program 1 times [2020-07-21 02:28:30,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:30,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671300535] [2020-07-21 02:28:30,684 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 02:28:31,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:33,332 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 02:28:33,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:33,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671300535] [2020-07-21 02:28:33,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:33,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:33,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971004836] [2020-07-21 02:28:33,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:33,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:33,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:33,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:33,335 INFO L87 Difference]: Start difference. First operand 133431 states and 215459 transitions. Second operand 3 states. [2020-07-21 02:28:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:44,257 INFO L93 Difference]: Finished difference Result 395992 states and 639068 transitions. [2020-07-21 02:28:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:44,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:28:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:44,568 INFO L225 Difference]: With dead ends: 395992 [2020-07-21 02:28:44,568 INFO L226 Difference]: Without dead ends: 263276 [2020-07-21 02:28:44,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263276 states. [2020-07-21 02:28:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263276 to 133191. [2020-07-21 02:28:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133191 states. [2020-07-21 02:28:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133191 states to 133191 states and 215064 transitions. [2020-07-21 02:28:54,787 INFO L78 Accepts]: Start accepts. Automaton has 133191 states and 215064 transitions. Word has length 495 [2020-07-21 02:28:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:54,787 INFO L479 AbstractCegarLoop]: Abstraction has 133191 states and 215064 transitions. [2020-07-21 02:28:54,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 133191 states and 215064 transitions. [2020-07-21 02:28:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:28:54,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:54,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:55,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:55,081 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash 50639610, now seen corresponding path program 1 times [2020-07-21 02:28:55,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:55,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246514171] [2020-07-21 02:28:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:28:55,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:55,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:28:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:56,014 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 02:28:56,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:56,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246514171] [2020-07-21 02:28:56,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:56,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:56,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262180326] [2020-07-21 02:28:56,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:56,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:56,017 INFO L87 Difference]: Start difference. First operand 133191 states and 215064 transitions. Second operand 4 states. [2020-07-21 02:29:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:10,022 INFO L93 Difference]: Finished difference Result 383711 states and 617334 transitions. [2020-07-21 02:29:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:10,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 02:29:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:10,366 INFO L225 Difference]: With dead ends: 383711 [2020-07-21 02:29:10,366 INFO L226 Difference]: Without dead ends: 260815 [2020-07-21 02:29:10,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260815 states. [2020-07-21 02:29:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260815 to 141383. [2020-07-21 02:29:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141383 states. [2020-07-21 02:29:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141383 states to 141383 states and 229394 transitions. [2020-07-21 02:29:19,763 INFO L78 Accepts]: Start accepts. Automaton has 141383 states and 229394 transitions. Word has length 496 [2020-07-21 02:29:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:19,764 INFO L479 AbstractCegarLoop]: Abstraction has 141383 states and 229394 transitions. [2020-07-21 02:29:19,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:29:19,764 INFO L276 IsEmpty]: Start isEmpty. Operand 141383 states and 229394 transitions. [2020-07-21 02:29:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 02:29:19,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:19,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:20,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:20,066 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:20,067 INFO L82 PathProgramCache]: Analyzing trace with hash 247385465, now seen corresponding path program 1 times [2020-07-21 02:29:20,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:20,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524914215] [2020-07-21 02:29:20,068 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 02:29:20,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:20,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:20,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:29:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:20,619 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 02:29:20,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:20,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524914215] [2020-07-21 02:29:20,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:20,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:29:20,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158115008] [2020-07-21 02:29:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:29:20,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:29:20,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:29:20,622 INFO L87 Difference]: Start difference. First operand 141383 states and 229394 transitions. Second operand 4 states. [2020-07-21 02:29:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:32,362 INFO L93 Difference]: Finished difference Result 329637 states and 537264 transitions. [2020-07-21 02:29:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:32,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-21 02:29:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:32,580 INFO L225 Difference]: With dead ends: 329637 [2020-07-21 02:29:32,580 INFO L226 Difference]: Without dead ends: 169789 [2020-07-21 02:29:32,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169789 states. [2020-07-21 02:29:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169789 to 169668. [2020-07-21 02:29:45,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169668 states. [2020-07-21 02:29:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169668 states to 169668 states and 275920 transitions. [2020-07-21 02:29:45,285 INFO L78 Accepts]: Start accepts. Automaton has 169668 states and 275920 transitions. Word has length 497 [2020-07-21 02:29:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:45,286 INFO L479 AbstractCegarLoop]: Abstraction has 169668 states and 275920 transitions. [2020-07-21 02:29:45,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:29:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 169668 states and 275920 transitions. [2020-07-21 02:29:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:29:45,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:45,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:45,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:45,631 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1644676474, now seen corresponding path program 1 times [2020-07-21 02:29:45,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:45,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010789074] [2020-07-21 02:29:45,633 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 02:29:46,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:46,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:29:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:46,132 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 02:29:46,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:46,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010789074] [2020-07-21 02:29:46,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:46,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:29:46,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175947089] [2020-07-21 02:29:46,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:29:46,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:46,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:29:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:29:46,134 INFO L87 Difference]: Start difference. First operand 169668 states and 275920 transitions. Second operand 4 states. [2020-07-21 02:30:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:07,768 INFO L93 Difference]: Finished difference Result 463715 states and 749227 transitions. [2020-07-21 02:30:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:07,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 02:30:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:08,448 INFO L225 Difference]: With dead ends: 463715 [2020-07-21 02:30:08,449 INFO L226 Difference]: Without dead ends: 317663 [2020-07-21 02:30:08,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:30:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317663 states. [2020-07-21 02:30:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317663 to 188266. [2020-07-21 02:30:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188266 states. [2020-07-21 02:30:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188266 states to 188266 states and 307531 transitions. [2020-07-21 02:30:21,320 INFO L78 Accepts]: Start accepts. Automaton has 188266 states and 307531 transitions. Word has length 498 [2020-07-21 02:30:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:21,321 INFO L479 AbstractCegarLoop]: Abstraction has 188266 states and 307531 transitions. [2020-07-21 02:30:21,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 188266 states and 307531 transitions. [2020-07-21 02:30:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:30:21,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:21,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:21,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:21,720 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1058882398, now seen corresponding path program 1 times [2020-07-21 02:30:21,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:21,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695686786] [2020-07-21 02:30:21,722 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 02:30:22,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:22,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:22,409 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 02:30:22,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:22,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695686786] [2020-07-21 02:30:22,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:22,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:22,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438728011] [2020-07-21 02:30:22,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:22,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:22,411 INFO L87 Difference]: Start difference. First operand 188266 states and 307531 transitions. Second operand 3 states. [2020-07-21 02:30:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:44,826 INFO L93 Difference]: Finished difference Result 522092 states and 847459 transitions. [2020-07-21 02:30:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:44,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 02:30:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:45,262 INFO L225 Difference]: With dead ends: 522092 [2020-07-21 02:30:45,262 INFO L226 Difference]: Without dead ends: 359387 [2020-07-21 02:30:45,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359387 states. [2020-07-21 02:31:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359387 to 358955. [2020-07-21 02:31:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358955 states. [2020-07-21 02:31:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358955 states to 358955 states and 582292 transitions. [2020-07-21 02:31:13,702 INFO L78 Accepts]: Start accepts. Automaton has 358955 states and 582292 transitions. Word has length 498 [2020-07-21 02:31:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:13,703 INFO L479 AbstractCegarLoop]: Abstraction has 358955 states and 582292 transitions. [2020-07-21 02:31:13,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 358955 states and 582292 transitions. [2020-07-21 02:31:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:31:14,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:14,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:14,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:14,908 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1628882298, now seen corresponding path program 1 times [2020-07-21 02:31:14,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:14,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330440831] [2020-07-21 02:31:14,910 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 02:31:15,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:31:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:31:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:15,833 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 02:31:15,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:15,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330440831] [2020-07-21 02:31:15,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:15,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:31:15,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071107938] [2020-07-21 02:31:15,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:31:15,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:31:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:15,837 INFO L87 Difference]: Start difference. First operand 358955 states and 582292 transitions. Second operand 3 states. [2020-07-21 02:32:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:05,712 INFO L93 Difference]: Finished difference Result 1005902 states and 1624295 transitions. [2020-07-21 02:32:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:32:05,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 02:32:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:06,768 INFO L225 Difference]: With dead ends: 1005902 [2020-07-21 02:32:06,768 INFO L226 Difference]: Without dead ends: 697444 [2020-07-21 02:32:07,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697444 states. [2020-07-21 02:33:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697444 to 697427. [2020-07-21 02:33:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697427 states. [2020-07-21 02:33:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697427 states to 697427 states and 1125548 transitions. [2020-07-21 02:33:07,833 INFO L78 Accepts]: Start accepts. Automaton has 697427 states and 1125548 transitions. Word has length 501 [2020-07-21 02:33:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:07,833 INFO L479 AbstractCegarLoop]: Abstraction has 697427 states and 1125548 transitions. [2020-07-21 02:33:07,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 697427 states and 1125548 transitions. [2020-07-21 02:33:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 02:33:08,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:08,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:33:08,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:08,704 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1686592528, now seen corresponding path program 1 times [2020-07-21 02:33:08,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:08,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556299309] [2020-07-21 02:33:08,706 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 02:33:09,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:09,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:33:09,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:09,471 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 02:33:09,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:09,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556299309] [2020-07-21 02:33:09,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:09,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:09,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684662462] [2020-07-21 02:33:09,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:09,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:09,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:09,473 INFO L87 Difference]: Start difference. First operand 697427 states and 1125548 transitions. Second operand 4 states. [2020-07-21 02:34:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:34:24,452 INFO L93 Difference]: Finished difference Result 1570689 states and 2543898 transitions. [2020-07-21 02:34:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:34:24,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 02:34:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:34:25,928 INFO L225 Difference]: With dead ends: 1570689 [2020-07-21 02:34:25,928 INFO L226 Difference]: Without dead ends: 881251 [2020-07-21 02:34:26,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:34:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881251 states. [2020-07-21 02:35:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881251 to 701404. [2020-07-21 02:35:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701404 states. [2020-07-21 02:35:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701404 states to 701404 states and 1132397 transitions. [2020-07-21 02:35:28,983 INFO L78 Accepts]: Start accepts. Automaton has 701404 states and 1132397 transitions. Word has length 502 [2020-07-21 02:35:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:35:28,984 INFO L479 AbstractCegarLoop]: Abstraction has 701404 states and 1132397 transitions. [2020-07-21 02:35:28,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:35:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 701404 states and 1132397 transitions. [2020-07-21 02:35:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 02:35:29,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:35:29,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:35:29,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:35:29,902 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:35:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:35:29,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1900129796, now seen corresponding path program 1 times [2020-07-21 02:35:29,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:35:29,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861459694] [2020-07-21 02:35:29,904 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 02:35:31,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:35:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:35:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:35:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:35:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:35:31,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:35:31,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861459694] [2020-07-21 02:35:31,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:35:31,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:35:31,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842848852] [2020-07-21 02:35:31,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:35:31,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:35:31,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:35:31,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:35:31,530 INFO L87 Difference]: Start difference. First operand 701404 states and 1132397 transitions. Second operand 3 states. [2020-07-21 02:37:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:37:22,529 INFO L93 Difference]: Finished difference Result 2033780 states and 3278394 transitions. [2020-07-21 02:37:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:37:22,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 02:37:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:37:24,879 INFO L225 Difference]: With dead ends: 2033780 [2020-07-21 02:37:24,879 INFO L226 Difference]: Without dead ends: 1373103 [2020-07-21 02:37:25,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:37:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373103 states.