/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 DAGSIZE --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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:11:15,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:11:15,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:11:15,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:11:15,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:11:15,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:11:15,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:11:15,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:11:15,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:11:15,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:11:15,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:11:15,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:11:15,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:11:15,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:11:15,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:11:15,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:11:15,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:11:15,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:11:15,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:11:15,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:11:15,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:11:15,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:11:15,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:11:15,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:11:15,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:11:15,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:11:15,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:11:15,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:11:15,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 23:11:15,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:11:15,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:11:15,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:11:15,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:11:15,225 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:11:15,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:11:15,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:11:15,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:11:15,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:11:15,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:11:15,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:11:15,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:11:15,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:11:15,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:11:15,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:11:15,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:11:15,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:11:15,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:11:15,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:11:15,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:11:15,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:11:15,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:11:15,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:11:15,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:11:15,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:11:15,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:11:15,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:15,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:11:15,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:11:15,233 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:11:15,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:11:15,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:11:15,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:11:15,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:11:15,570 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:11:15,571 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 23:11:15,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3edfce6/343fc910bb7947dfa5d1aa376a77796e/FLAGabcf6846c [2020-07-20 23:11:16,480 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:11:16,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 23:11:16,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3edfce6/343fc910bb7947dfa5d1aa376a77796e/FLAGabcf6846c [2020-07-20 23:11:16,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3edfce6/343fc910bb7947dfa5d1aa376a77796e [2020-07-20 23:11:17,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:11:17,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:11:17,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:11:17,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:11:17,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:11:17,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:11:16" (1/1) ... [2020-07-20 23:11:17,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24710811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:17, skipping insertion in model container [2020-07-20 23:11:17,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:11:16" (1/1) ... [2020-07-20 23:11:17,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:11:17,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:11:19,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:11:19,763 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:11:21,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:11:21,688 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:11:21,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21 WrapperNode [2020-07-20 23:11:21,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:11:21,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:11:21,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:11:21,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:11:21,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:21,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:21,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:21,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:21,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:22,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:22,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... [2020-07-20 23:11:22,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:11:22,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:11:22,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:11:22,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:11:22,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:11:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:11:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:11:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:11:22,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:11:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:11:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:11:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:11:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:11:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:11:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:11:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:11:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:11:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:11:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:11:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:11:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:11:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 23:11:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:11:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:11:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:11:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:11:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:11:28,493 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:11:28,493 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:11:28,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:11:28 BoogieIcfgContainer [2020-07-20 23:11:28,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:11:28,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:11:28,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:11:28,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:11:28,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:11:16" (1/3) ... [2020-07-20 23:11:28,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243d633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:11:28, skipping insertion in model container [2020-07-20 23:11:28,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:21" (2/3) ... [2020-07-20 23:11:28,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243d633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:11:28, skipping insertion in model container [2020-07-20 23:11:28,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:11:28" (3/3) ... [2020-07-20 23:11:28,517 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 23:11:28,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:11:28,538 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 23:11:28,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 23:11:28,591 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:11:28,592 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:11:28,592 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:11:28,592 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:11:28,592 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:11:28,592 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:11:28,593 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:11:28,593 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:11:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-20 23:11:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 23:11:28,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:28,691 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] [2020-07-20 23:11:28,692 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-20 23:11:28,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:28,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893537305] [2020-07-20 23:11:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:29,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:29,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:29,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:29,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893537305] [2020-07-20 23:11:29,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:29,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:29,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841287210] [2020-07-20 23:11:29,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:29,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:29,517 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 4 states. [2020-07-20 23:11:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:29,721 INFO L93 Difference]: Finished difference Result 4047 states and 7028 transitions. [2020-07-20 23:11:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:29,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-20 23:11:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:29,764 INFO L225 Difference]: With dead ends: 4047 [2020-07-20 23:11:29,765 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 23:11:29,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 23:11:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 23:11:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 23:11:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4372 transitions. [2020-07-20 23:11:29,925 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4372 transitions. Word has length 322 [2020-07-20 23:11:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:29,926 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4372 transitions. [2020-07-20 23:11:29,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4372 transitions. [2020-07-20 23:11:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:11:29,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:29,937 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] [2020-07-20 23:11:30,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:30,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash 237230463, now seen corresponding path program 1 times [2020-07-20 23:11:30,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:30,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345941540] [2020-07-20 23:11:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:30,559 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:30,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:30,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:30,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345941540] [2020-07-20 23:11:30,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:30,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:30,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189753647] [2020-07-20 23:11:30,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:30,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:30,760 INFO L87 Difference]: Start difference. First operand 2511 states and 4372 transitions. Second operand 4 states. [2020-07-20 23:11:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:30,867 INFO L93 Difference]: Finished difference Result 3386 states and 5863 transitions. [2020-07-20 23:11:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:30,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 23:11:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:30,883 INFO L225 Difference]: With dead ends: 3386 [2020-07-20 23:11:30,884 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 23:11:30,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 23:11:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 23:11:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 23:11:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4362 transitions. [2020-07-20 23:11:30,953 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4362 transitions. Word has length 331 [2020-07-20 23:11:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:30,954 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4362 transitions. [2020-07-20 23:11:30,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4362 transitions. [2020-07-20 23:11:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:11:30,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:30,964 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] [2020-07-20 23:11:31,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:31,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996600, now seen corresponding path program 1 times [2020-07-20 23:11:31,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:31,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988120590] [2020-07-20 23:11:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:31,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:31,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:31,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:31,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:31,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988120590] [2020-07-20 23:11:31,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:31,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:31,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379445601] [2020-07-20 23:11:31,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:31,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:31,651 INFO L87 Difference]: Start difference. First operand 2511 states and 4362 transitions. Second operand 4 states. [2020-07-20 23:11:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:31,742 INFO L93 Difference]: Finished difference Result 2952 states and 5111 transitions. [2020-07-20 23:11:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:31,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 23:11:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:31,756 INFO L225 Difference]: With dead ends: 2952 [2020-07-20 23:11:31,757 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 23:11:31,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 23:11:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 23:11:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 23:11:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4352 transitions. [2020-07-20 23:11:31,821 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4352 transitions. Word has length 340 [2020-07-20 23:11:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:31,822 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4352 transitions. [2020-07-20 23:11:31,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4352 transitions. [2020-07-20 23:11:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-20 23:11:31,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:31,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:32,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:32,048 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 908469997, now seen corresponding path program 1 times [2020-07-20 23:11:32,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:32,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605154805] [2020-07-20 23:11:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:32,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:32,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:32,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605154805] [2020-07-20 23:11:32,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:32,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:32,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728830641] [2020-07-20 23:11:32,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:32,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:32,652 INFO L87 Difference]: Start difference. First operand 2511 states and 4352 transitions. Second operand 4 states. [2020-07-20 23:11:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:32,756 INFO L93 Difference]: Finished difference Result 3169 states and 5462 transitions. [2020-07-20 23:11:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:32,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-07-20 23:11:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:32,772 INFO L225 Difference]: With dead ends: 3169 [2020-07-20 23:11:32,772 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 23:11:32,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 23:11:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 23:11:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 23:11:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4342 transitions. [2020-07-20 23:11:32,878 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4342 transitions. Word has length 349 [2020-07-20 23:11:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:32,879 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4342 transitions. [2020-07-20 23:11:32,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4342 transitions. [2020-07-20 23:11:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-20 23:11:32,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:32,893 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] [2020-07-20 23:11:33,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:33,109 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:33,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1477305151, now seen corresponding path program 1 times [2020-07-20 23:11:33,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:33,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865921347] [2020-07-20 23:11:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:33,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:33,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:33,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:33,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:33,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865921347] [2020-07-20 23:11:33,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:33,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:33,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117304537] [2020-07-20 23:11:33,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:33,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:33,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:33,574 INFO L87 Difference]: Start difference. First operand 2511 states and 4342 transitions. Second operand 4 states. [2020-07-20 23:11:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:33,667 INFO L93 Difference]: Finished difference Result 3820 states and 6545 transitions. [2020-07-20 23:11:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:33,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 358 [2020-07-20 23:11:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:33,682 INFO L225 Difference]: With dead ends: 3820 [2020-07-20 23:11:33,682 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 23:11:33,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 23:11:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 23:11:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 23:11:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4332 transitions. [2020-07-20 23:11:33,794 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4332 transitions. Word has length 358 [2020-07-20 23:11:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:33,795 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4332 transitions. [2020-07-20 23:11:33,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4332 transitions. [2020-07-20 23:11:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-20 23:11:33,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:33,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:34,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:34,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:34,022 INFO L82 PathProgramCache]: Analyzing trace with hash -634938202, now seen corresponding path program 1 times [2020-07-20 23:11:34,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:34,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982096836] [2020-07-20 23:11:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:34,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:34,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:34,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:34,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982096836] [2020-07-20 23:11:34,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:34,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:34,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056927548] [2020-07-20 23:11:34,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:34,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:34,520 INFO L87 Difference]: Start difference. First operand 2511 states and 4332 transitions. Second operand 3 states. [2020-07-20 23:11:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:34,819 INFO L93 Difference]: Finished difference Result 4669 states and 7953 transitions. [2020-07-20 23:11:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:34,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 367 [2020-07-20 23:11:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:34,835 INFO L225 Difference]: With dead ends: 4669 [2020-07-20 23:11:34,835 INFO L226 Difference]: Without dead ends: 3072 [2020-07-20 23:11:34,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2020-07-20 23:11:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3068. [2020-07-20 23:11:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3068 states. [2020-07-20 23:11:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 5271 transitions. [2020-07-20 23:11:34,920 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 5271 transitions. Word has length 367 [2020-07-20 23:11:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:34,921 INFO L479 AbstractCegarLoop]: Abstraction has 3068 states and 5271 transitions. [2020-07-20 23:11:34,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 5271 transitions. [2020-07-20 23:11:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-07-20 23:11:34,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:34,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:35,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:35,144 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 614959806, now seen corresponding path program 1 times [2020-07-20 23:11:35,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:35,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720809186] [2020-07-20 23:11:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:35,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:35,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:35,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:35,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720809186] [2020-07-20 23:11:35,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:35,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:35,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720779895] [2020-07-20 23:11:35,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:35,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:35,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:35,908 INFO L87 Difference]: Start difference. First operand 3068 states and 5271 transitions. Second operand 3 states. [2020-07-20 23:11:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:36,280 INFO L93 Difference]: Finished difference Result 5809 states and 9883 transitions. [2020-07-20 23:11:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:36,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 369 [2020-07-20 23:11:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:36,305 INFO L225 Difference]: With dead ends: 5809 [2020-07-20 23:11:36,306 INFO L226 Difference]: Without dead ends: 4376 [2020-07-20 23:11:36,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2020-07-20 23:11:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3557. [2020-07-20 23:11:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3557 states. [2020-07-20 23:11:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 6096 transitions. [2020-07-20 23:11:36,421 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 6096 transitions. Word has length 369 [2020-07-20 23:11:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:36,422 INFO L479 AbstractCegarLoop]: Abstraction has 3557 states and 6096 transitions. [2020-07-20 23:11:36,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 6096 transitions. [2020-07-20 23:11:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-20 23:11:36,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:36,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:36,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:36,654 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 975735568, now seen corresponding path program 1 times [2020-07-20 23:11:36,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:36,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618018495] [2020-07-20 23:11:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:37,054 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:37,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:37,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:37,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:37,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618018495] [2020-07-20 23:11:37,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:37,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:37,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340541941] [2020-07-20 23:11:37,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:37,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:37,167 INFO L87 Difference]: Start difference. First operand 3557 states and 6096 transitions. Second operand 4 states. [2020-07-20 23:11:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:37,269 INFO L93 Difference]: Finished difference Result 6171 states and 10490 transitions. [2020-07-20 23:11:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:37,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 370 [2020-07-20 23:11:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:37,286 INFO L225 Difference]: With dead ends: 6171 [2020-07-20 23:11:37,287 INFO L226 Difference]: Without dead ends: 3382 [2020-07-20 23:11:37,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2020-07-20 23:11:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 3382. [2020-07-20 23:11:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3382 states. [2020-07-20 23:11:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 5791 transitions. [2020-07-20 23:11:37,382 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 5791 transitions. Word has length 370 [2020-07-20 23:11:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:37,382 INFO L479 AbstractCegarLoop]: Abstraction has 3382 states and 5791 transitions. [2020-07-20 23:11:37,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 5791 transitions. [2020-07-20 23:11:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-07-20 23:11:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:37,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:37,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:37,605 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2132472937, now seen corresponding path program 1 times [2020-07-20 23:11:37,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:37,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184191235] [2020-07-20 23:11:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:38,040 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:11:38,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:38,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:38,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184191235] [2020-07-20 23:11:38,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:38,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:38,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834180594] [2020-07-20 23:11:38,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:38,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:38,130 INFO L87 Difference]: Start difference. First operand 3382 states and 5791 transitions. Second operand 4 states. [2020-07-20 23:11:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:38,234 INFO L93 Difference]: Finished difference Result 5007 states and 8522 transitions. [2020-07-20 23:11:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:38,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 378 [2020-07-20 23:11:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:38,243 INFO L225 Difference]: With dead ends: 5007 [2020-07-20 23:11:38,244 INFO L226 Difference]: Without dead ends: 3207 [2020-07-20 23:11:38,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2020-07-20 23:11:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3044. [2020-07-20 23:11:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3044 states. [2020-07-20 23:11:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 5211 transitions. [2020-07-20 23:11:38,329 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 5211 transitions. Word has length 378 [2020-07-20 23:11:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:38,330 INFO L479 AbstractCegarLoop]: Abstraction has 3044 states and 5211 transitions. [2020-07-20 23:11:38,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 5211 transitions. [2020-07-20 23:11:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-20 23:11:38,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:38,337 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] [2020-07-20 23:11:38,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:38,551 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:38,552 INFO L82 PathProgramCache]: Analyzing trace with hash -98615583, now seen corresponding path program 1 times [2020-07-20 23:11:38,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:38,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93830366] [2020-07-20 23:11:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:38,931 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:38,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:39,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:39,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93830366] [2020-07-20 23:11:39,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:39,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:39,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336111407] [2020-07-20 23:11:39,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:39,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:39,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:39,080 INFO L87 Difference]: Start difference. First operand 3044 states and 5211 transitions. Second operand 3 states. [2020-07-20 23:11:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:39,333 INFO L93 Difference]: Finished difference Result 5449 states and 9261 transitions. [2020-07-20 23:11:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:39,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 386 [2020-07-20 23:11:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:39,348 INFO L225 Difference]: With dead ends: 5449 [2020-07-20 23:11:39,349 INFO L226 Difference]: Without dead ends: 4857 [2020-07-20 23:11:39,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2020-07-20 23:11:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 3867. [2020-07-20 23:11:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3867 states. [2020-07-20 23:11:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6598 transitions. [2020-07-20 23:11:39,499 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6598 transitions. Word has length 386 [2020-07-20 23:11:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:39,500 INFO L479 AbstractCegarLoop]: Abstraction has 3867 states and 6598 transitions. [2020-07-20 23:11:39,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6598 transitions. [2020-07-20 23:11:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-07-20 23:11:39,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:39,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:39,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:39,725 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash 334293012, now seen corresponding path program 1 times [2020-07-20 23:11:39,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:39,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719191812] [2020-07-20 23:11:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:40,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:40,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:40,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719191812] [2020-07-20 23:11:40,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:40,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:40,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869598413] [2020-07-20 23:11:40,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:40,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:40,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:40,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:40,425 INFO L87 Difference]: Start difference. First operand 3867 states and 6598 transitions. Second operand 3 states. [2020-07-20 23:11:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:40,771 INFO L93 Difference]: Finished difference Result 7275 states and 12330 transitions. [2020-07-20 23:11:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:40,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 387 [2020-07-20 23:11:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:40,793 INFO L225 Difference]: With dead ends: 7275 [2020-07-20 23:11:40,793 INFO L226 Difference]: Without dead ends: 6151 [2020-07-20 23:11:40,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2020-07-20 23:11:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5392. [2020-07-20 23:11:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5392 states. [2020-07-20 23:11:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 9166 transitions. [2020-07-20 23:11:41,012 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 9166 transitions. Word has length 387 [2020-07-20 23:11:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:41,013 INFO L479 AbstractCegarLoop]: Abstraction has 5392 states and 9166 transitions. [2020-07-20 23:11:41,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 9166 transitions. [2020-07-20 23:11:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-07-20 23:11:41,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:41,023 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] [2020-07-20 23:11:41,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:41,236 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 874115592, now seen corresponding path program 1 times [2020-07-20 23:11:41,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:41,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557559217] [2020-07-20 23:11:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:41,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:41,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:41,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:41,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:41,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:41,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557559217] [2020-07-20 23:11:41,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:41,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:41,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605085994] [2020-07-20 23:11:41,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:41,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:41,847 INFO L87 Difference]: Start difference. First operand 5392 states and 9166 transitions. Second operand 3 states. [2020-07-20 23:11:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:42,178 INFO L93 Difference]: Finished difference Result 10875 states and 18382 transitions. [2020-07-20 23:11:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:42,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 388 [2020-07-20 23:11:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:42,200 INFO L225 Difference]: With dead ends: 10875 [2020-07-20 23:11:42,200 INFO L226 Difference]: Without dead ends: 8689 [2020-07-20 23:11:42,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8689 states. [2020-07-20 23:11:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8689 to 8158. [2020-07-20 23:11:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8158 states. [2020-07-20 23:11:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 13818 transitions. [2020-07-20 23:11:42,440 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 13818 transitions. Word has length 388 [2020-07-20 23:11:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:42,441 INFO L479 AbstractCegarLoop]: Abstraction has 8158 states and 13818 transitions. [2020-07-20 23:11:42,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 13818 transitions. [2020-07-20 23:11:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-20 23:11:42,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:42,451 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] [2020-07-20 23:11:42,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:42,666 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash 433304411, now seen corresponding path program 1 times [2020-07-20 23:11:42,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:42,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873141673] [2020-07-20 23:11:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:43,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:43,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:43,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:43,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:43,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873141673] [2020-07-20 23:11:43,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:43,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:43,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638986615] [2020-07-20 23:11:43,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:43,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:43,212 INFO L87 Difference]: Start difference. First operand 8158 states and 13818 transitions. Second operand 3 states. [2020-07-20 23:11:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:43,594 INFO L93 Difference]: Finished difference Result 17694 states and 29838 transitions. [2020-07-20 23:11:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:43,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 389 [2020-07-20 23:11:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:43,629 INFO L225 Difference]: With dead ends: 17694 [2020-07-20 23:11:43,629 INFO L226 Difference]: Without dead ends: 13389 [2020-07-20 23:11:43,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13389 states. [2020-07-20 23:11:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13389 to 13080. [2020-07-20 23:11:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13080 states. [2020-07-20 23:11:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13080 states to 13080 states and 22082 transitions. [2020-07-20 23:11:44,150 INFO L78 Accepts]: Start accepts. Automaton has 13080 states and 22082 transitions. Word has length 389 [2020-07-20 23:11:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:44,151 INFO L479 AbstractCegarLoop]: Abstraction has 13080 states and 22082 transitions. [2020-07-20 23:11:44,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 13080 states and 22082 transitions. [2020-07-20 23:11:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-20 23:11:44,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:44,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:44,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:44,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash -342382289, now seen corresponding path program 1 times [2020-07-20 23:11:44,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:44,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962131812] [2020-07-20 23:11:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:44,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:44,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:44,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962131812] [2020-07-20 23:11:44,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:44,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:44,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107533777] [2020-07-20 23:11:44,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:44,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:44,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:44,920 INFO L87 Difference]: Start difference. First operand 13080 states and 22082 transitions. Second operand 3 states. [2020-07-20 23:11:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:45,403 INFO L93 Difference]: Finished difference Result 30164 states and 50765 transitions. [2020-07-20 23:11:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:45,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 390 [2020-07-20 23:11:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:45,465 INFO L225 Difference]: With dead ends: 30164 [2020-07-20 23:11:45,465 INFO L226 Difference]: Without dead ends: 21632 [2020-07-20 23:11:45,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21632 states. [2020-07-20 23:11:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21632 to 21534. [2020-07-20 23:11:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21534 states. [2020-07-20 23:11:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21534 states to 21534 states and 36247 transitions. [2020-07-20 23:11:47,044 INFO L78 Accepts]: Start accepts. Automaton has 21534 states and 36247 transitions. Word has length 390 [2020-07-20 23:11:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:47,045 INFO L479 AbstractCegarLoop]: Abstraction has 21534 states and 36247 transitions. [2020-07-20 23:11:47,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 21534 states and 36247 transitions. [2020-07-20 23:11:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-07-20 23:11:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:47,053 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] [2020-07-20 23:11:47,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:47,268 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash 83965051, now seen corresponding path program 1 times [2020-07-20 23:11:47,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:47,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162814507] [2020-07-20 23:11:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:47,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:47,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 23:11:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:47,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:47,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162814507] [2020-07-20 23:11:47,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:47,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:47,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548211513] [2020-07-20 23:11:47,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:47,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:47,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:47,769 INFO L87 Difference]: Start difference. First operand 21534 states and 36247 transitions. Second operand 4 states. [2020-07-20 23:11:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:48,257 INFO L93 Difference]: Finished difference Result 42517 states and 71458 transitions. [2020-07-20 23:11:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:11:48,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-07-20 23:11:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:48,292 INFO L225 Difference]: With dead ends: 42517 [2020-07-20 23:11:48,292 INFO L226 Difference]: Without dead ends: 21534 [2020-07-20 23:11:48,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21534 states. [2020-07-20 23:11:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21534 to 21534. [2020-07-20 23:11:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21534 states. [2020-07-20 23:11:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21534 states to 21534 states and 36182 transitions. [2020-07-20 23:11:49,153 INFO L78 Accepts]: Start accepts. Automaton has 21534 states and 36182 transitions. Word has length 391 [2020-07-20 23:11:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:49,154 INFO L479 AbstractCegarLoop]: Abstraction has 21534 states and 36182 transitions. [2020-07-20 23:11:49,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 21534 states and 36182 transitions. [2020-07-20 23:11:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-07-20 23:11:49,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:49,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:11:49,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:49,368 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 197088704, now seen corresponding path program 1 times [2020-07-20 23:11:49,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:49,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855440576] [2020-07-20 23:11:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:49,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:49,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:49,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:49,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855440576] [2020-07-20 23:11:49,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:49,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:49,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918968400] [2020-07-20 23:11:49,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:49,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:49,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:49,906 INFO L87 Difference]: Start difference. First operand 21534 states and 36182 transitions. Second operand 3 states. [2020-07-20 23:11:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:51,611 INFO L93 Difference]: Finished difference Result 52510 states and 88061 transitions. [2020-07-20 23:11:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:51,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 455 [2020-07-20 23:11:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:51,650 INFO L225 Difference]: With dead ends: 52510 [2020-07-20 23:11:51,650 INFO L226 Difference]: Without dead ends: 31568 [2020-07-20 23:11:51,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31568 states. [2020-07-20 23:11:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31568 to 31564. [2020-07-20 23:11:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31564 states. [2020-07-20 23:11:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31564 states to 31564 states and 52842 transitions. [2020-07-20 23:11:52,378 INFO L78 Accepts]: Start accepts. Automaton has 31564 states and 52842 transitions. Word has length 455 [2020-07-20 23:11:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:52,379 INFO L479 AbstractCegarLoop]: Abstraction has 31564 states and 52842 transitions. [2020-07-20 23:11:52,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31564 states and 52842 transitions. [2020-07-20 23:11:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-07-20 23:11:52,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:52,388 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] [2020-07-20 23:11:52,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:52,602 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash 993047596, now seen corresponding path program 1 times [2020-07-20 23:11:52,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:52,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059917943] [2020-07-20 23:11:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:53,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:53,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:53,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:53,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:53,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:53,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059917943] [2020-07-20 23:11:53,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:53,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:53,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710745490] [2020-07-20 23:11:53,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:53,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:53,147 INFO L87 Difference]: Start difference. First operand 31564 states and 52842 transitions. Second operand 3 states. [2020-07-20 23:11:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:54,269 INFO L93 Difference]: Finished difference Result 67690 states and 113411 transitions. [2020-07-20 23:11:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:54,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 460 [2020-07-20 23:11:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:54,336 INFO L225 Difference]: With dead ends: 67690 [2020-07-20 23:11:54,337 INFO L226 Difference]: Without dead ends: 46737 [2020-07-20 23:11:54,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46737 states. [2020-07-20 23:11:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46737 to 46733. [2020-07-20 23:11:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46733 states. [2020-07-20 23:11:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46733 states to 46733 states and 78176 transitions. [2020-07-20 23:11:55,315 INFO L78 Accepts]: Start accepts. Automaton has 46733 states and 78176 transitions. Word has length 460 [2020-07-20 23:11:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:55,316 INFO L479 AbstractCegarLoop]: Abstraction has 46733 states and 78176 transitions. [2020-07-20 23:11:55,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46733 states and 78176 transitions. [2020-07-20 23:11:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-20 23:11:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:55,326 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] [2020-07-20 23:11:55,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:55,538 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:55,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1478281099, now seen corresponding path program 1 times [2020-07-20 23:11:55,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:55,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827458932] [2020-07-20 23:11:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:56,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:56,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:11:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:56,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:56,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827458932] [2020-07-20 23:11:56,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:56,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:56,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160050985] [2020-07-20 23:11:56,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:56,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:56,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:56,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:56,421 INFO L87 Difference]: Start difference. First operand 46733 states and 78176 transitions. Second operand 4 states. [2020-07-20 23:11:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:59,789 INFO L93 Difference]: Finished difference Result 139430 states and 233219 transitions. [2020-07-20 23:11:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:59,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-07-20 23:11:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:59,914 INFO L225 Difference]: With dead ends: 139430 [2020-07-20 23:11:59,914 INFO L226 Difference]: Without dead ends: 92714 [2020-07-20 23:11:59,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:12:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92714 states. [2020-07-20 23:12:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92714 to 92710. [2020-07-20 23:12:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92710 states. [2020-07-20 23:12:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92710 states to 92710 states and 154752 transitions. [2020-07-20 23:12:02,220 INFO L78 Accepts]: Start accepts. Automaton has 92710 states and 154752 transitions. Word has length 466 [2020-07-20 23:12:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:02,220 INFO L479 AbstractCegarLoop]: Abstraction has 92710 states and 154752 transitions. [2020-07-20 23:12:02,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:12:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 92710 states and 154752 transitions. [2020-07-20 23:12:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 23:12:02,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:02,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:12:02,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:02,441 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2039729531, now seen corresponding path program 1 times [2020-07-20 23:12:02,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:02,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931566217] [2020-07-20 23:12:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:02,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:12:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:02,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:02,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931566217] [2020-07-20 23:12:02,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:02,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:02,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707970393] [2020-07-20 23:12:02,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:02,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:02,976 INFO L87 Difference]: Start difference. First operand 92710 states and 154752 transitions. Second operand 3 states. [2020-07-20 23:12:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:08,682 INFO L93 Difference]: Finished difference Result 217546 states and 363608 transitions. [2020-07-20 23:12:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:12:08,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-20 23:12:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:08,850 INFO L225 Difference]: With dead ends: 217546 [2020-07-20 23:12:08,851 INFO L226 Difference]: Without dead ends: 125945 [2020-07-20 23:12:08,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125945 states. [2020-07-20 23:12:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125945 to 124717. [2020-07-20 23:12:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124717 states. [2020-07-20 23:12:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124717 states to 124717 states and 207723 transitions. [2020-07-20 23:12:12,160 INFO L78 Accepts]: Start accepts. Automaton has 124717 states and 207723 transitions. Word has length 467 [2020-07-20 23:12:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:12,160 INFO L479 AbstractCegarLoop]: Abstraction has 124717 states and 207723 transitions. [2020-07-20 23:12:12,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:12:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 124717 states and 207723 transitions. [2020-07-20 23:12:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 23:12:12,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:12,176 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] [2020-07-20 23:12:12,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:12,377 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1901437192, now seen corresponding path program 1 times [2020-07-20 23:12:12,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:12,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858056921] [2020-07-20 23:12:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:12,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:12:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:12:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:12,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:12,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858056921] [2020-07-20 23:12:12,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:12,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:12:12,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858430131] [2020-07-20 23:12:12,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:12:12,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:12,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:12:12,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:12:12,993 INFO L87 Difference]: Start difference. First operand 124717 states and 207723 transitions. Second operand 4 states. [2020-07-20 23:12:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:22,242 INFO L93 Difference]: Finished difference Result 372242 states and 620016 transitions. [2020-07-20 23:12:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:12:22,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-20 23:12:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:22,636 INFO L225 Difference]: With dead ends: 372242 [2020-07-20 23:12:22,636 INFO L226 Difference]: Without dead ends: 247543 [2020-07-20 23:12:22,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:12:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247543 states. [2020-07-20 23:12:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247543 to 247539. [2020-07-20 23:12:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247539 states. [2020-07-20 23:12:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247539 states to 247539 states and 411296 transitions. [2020-07-20 23:12:33,938 INFO L78 Accepts]: Start accepts. Automaton has 247539 states and 411296 transitions. Word has length 468 [2020-07-20 23:12:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:33,938 INFO L479 AbstractCegarLoop]: Abstraction has 247539 states and 411296 transitions. [2020-07-20 23:12:33,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:12:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 247539 states and 411296 transitions. [2020-07-20 23:12:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 23:12:33,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:33,972 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] [2020-07-20 23:12:34,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:34,182 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1589754939, now seen corresponding path program 1 times [2020-07-20 23:12:34,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:34,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473673602] [2020-07-20 23:12:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:34,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:12:34,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:34,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:35,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:35,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473673602] [2020-07-20 23:12:35,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:35,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:35,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372452096] [2020-07-20 23:12:35,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:35,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:35,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:35,497 INFO L87 Difference]: Start difference. First operand 247539 states and 411296 transitions. Second operand 3 states. [2020-07-20 23:12:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:52,402 INFO L93 Difference]: Finished difference Result 742527 states and 1233738 transitions. [2020-07-20 23:12:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:12:52,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-20 23:12:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:53,324 INFO L225 Difference]: With dead ends: 742527 [2020-07-20 23:12:53,324 INFO L226 Difference]: Without dead ends: 495029 [2020-07-20 23:12:53,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495029 states. [2020-07-20 23:13:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495029 to 247580. [2020-07-20 23:13:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247580 states. [2020-07-20 23:13:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247580 states to 247580 states and 411355 transitions. [2020-07-20 23:13:11,258 INFO L78 Accepts]: Start accepts. Automaton has 247580 states and 411355 transitions. Word has length 472 [2020-07-20 23:13:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:13:11,259 INFO L479 AbstractCegarLoop]: Abstraction has 247580 states and 411355 transitions. [2020-07-20 23:13:11,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:13:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 247580 states and 411355 transitions. [2020-07-20 23:13:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 23:13:11,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:13:11,303 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] [2020-07-20 23:13:11,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:11,517 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:13:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:13:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash 968286262, now seen corresponding path program 1 times [2020-07-20 23:13:11,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:13:11,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806265025] [2020-07-20 23:13:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:11,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:13:11,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:13:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:13:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:13:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:13:12,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:13:12,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806265025] [2020-07-20 23:13:12,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:13:12,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:13:12,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327470930] [2020-07-20 23:13:12,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:13:12,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:13:12,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:13:12,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:13:12,842 INFO L87 Difference]: Start difference. First operand 247580 states and 411355 transitions. Second operand 4 states. [2020-07-20 23:13:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:13:34,972 INFO L93 Difference]: Finished difference Result 735526 states and 1222349 transitions. [2020-07-20 23:13:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:13:34,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-20 23:13:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:13:35,877 INFO L225 Difference]: With dead ends: 735526 [2020-07-20 23:13:35,878 INFO L226 Difference]: Without dead ends: 488213 [2020-07-20 23:13:36,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:13:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488213 states. [2020-07-20 23:14:08,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488213 to 488209. [2020-07-20 23:14:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488209 states. [2020-07-20 23:14:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488209 states to 488209 states and 809834 transitions. [2020-07-20 23:14:09,868 INFO L78 Accepts]: Start accepts. Automaton has 488209 states and 809834 transitions. Word has length 472 [2020-07-20 23:14:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:14:09,868 INFO L479 AbstractCegarLoop]: Abstraction has 488209 states and 809834 transitions. [2020-07-20 23:14:09,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:14:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 488209 states and 809834 transitions. [2020-07-20 23:14:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 23:14:09,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:14:09,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:14:10,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:14:10,129 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:14:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:14:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash 622304984, now seen corresponding path program 1 times [2020-07-20 23:14:10,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:14:10,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169629269] [2020-07-20 23:14:10,132 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 [2020-07-20 23:14:10,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:14:10,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:14:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:14:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:14:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:14:10,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:14:10,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169629269] [2020-07-20 23:14:10,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:14:10,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:14:10,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876949978] [2020-07-20 23:14:10,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:14:10,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:14:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:14:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:14:10,774 INFO L87 Difference]: Start difference. First operand 488209 states and 809834 transitions. Second operand 4 states. [2020-07-20 23:15:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:15:08,371 INFO L93 Difference]: Finished difference Result 1448617 states and 2403544 transitions. [2020-07-20 23:15:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:15:08,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 23:15:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:15:10,113 INFO L225 Difference]: With dead ends: 1448617 [2020-07-20 23:15:10,113 INFO L226 Difference]: Without dead ends: 960807 [2020-07-20 23:15:10,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:15:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960807 states. [2020-07-20 23:16:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960807 to 960803. [2020-07-20 23:16:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960803 states. [2020-07-20 23:16:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960803 states to 960803 states and 1590816 transitions. [2020-07-20 23:16:19,155 INFO L78 Accepts]: Start accepts. Automaton has 960803 states and 1590816 transitions. Word has length 473 [2020-07-20 23:16:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:16:19,155 INFO L479 AbstractCegarLoop]: Abstraction has 960803 states and 1590816 transitions. [2020-07-20 23:16:19,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:16:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 960803 states and 1590816 transitions. [2020-07-20 23:16:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 23:16:19,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:16:19,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:16:19,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:16:19,466 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:16:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:16:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash 519856836, now seen corresponding path program 1 times [2020-07-20 23:16:19,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:16:19,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488328167] [2020-07-20 23:16:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:16:19,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:16:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:16:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:16:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:16:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:16:20,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:16:20,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488328167] [2020-07-20 23:16:20,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:16:20,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:16:20,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972250556] [2020-07-20 23:16:20,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:16:20,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:16:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:16:20,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:16:20,087 INFO L87 Difference]: Start difference. First operand 960803 states and 1590816 transitions. Second operand 4 states. [2020-07-20 23:18:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:18:21,498 INFO L93 Difference]: Finished difference Result 2865719 states and 4744320 transitions. [2020-07-20 23:18:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:18:21,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-20 23:18:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:18:25,056 INFO L225 Difference]: With dead ends: 2865719 [2020-07-20 23:18:25,056 INFO L226 Difference]: Without dead ends: 1905004 [2020-07-20 23:18:25,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:18:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905004 states.