/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:13:11,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:13:11,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:13:11,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:13:11,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:13:11,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:13:11,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:13:11,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:13:11,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:13:11,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:13:11,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:13:11,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:13:11,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:13:11,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:13:11,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:13:11,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:13:11,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:13:11,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:13:11,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:13:11,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:13:11,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:13:11,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:13:11,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:13:11,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:13:11,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 21:13:11,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:13:11,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:13:11,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:13:11,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:13:11,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:13:11,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:13:11,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:13:11,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:13:11,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:13:11,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:13:11,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:13:11,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 21:13:11,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:13:11,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:13:11,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:13:11,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:13:11,862 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:13:11,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:13:11,862 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:13:11,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:13:11,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:13:11,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:13:11,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:13:11,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:13:11,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:13:11,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:13:11,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:13:11,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:13:11,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:13:11,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:13:11,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:13:11,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:13:11,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:13:11,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:13:11,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:13:11,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:13:11,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:13:11,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:13:11,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:11,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:13:11,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:13:11,867 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 -> 2 [2020-07-21 21:13:12,139 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:13:12,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:13:12,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:13:12,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:13:12,158 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:13:12,158 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:13:12,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e6f99e3/9a659c35847b442bb6783ffdef0171e4/FLAG8e4e46319 [2020-07-21 21:13:12,959 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:13:12,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:13:12,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e6f99e3/9a659c35847b442bb6783ffdef0171e4/FLAG8e4e46319 [2020-07-21 21:13:13,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e6f99e3/9a659c35847b442bb6783ffdef0171e4 [2020-07-21 21:13:13,150 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:13:13,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:13:13,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:13:13,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:13:13,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:13:13,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:13" (1/1) ... [2020-07-21 21:13:13,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31392a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:13, skipping insertion in model container [2020-07-21 21:13:13,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:13" (1/1) ... [2020-07-21 21:13:13,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:13:13,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:13:14,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:13:14,898 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:13:16,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:13:16,285 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:13:16,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16 WrapperNode [2020-07-21 21:13:16,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:13:16,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:13:16,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:13:16,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:13:16,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... [2020-07-21 21:13:16,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:13:16,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:13:16,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:13:16,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:13:16,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:13:16,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:13:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:13:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:13:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:13:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:13:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:13:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:13:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:13:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:13:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:13:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:13:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:13:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:13:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:13:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:13:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:13:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:13:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 21:13:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:13:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:13:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:13:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:13:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:13:21,185 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:13:21,185 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:13:21,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:21 BoogieIcfgContainer [2020-07-21 21:13:21,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:13:21,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:13:21,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:13:21,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:13:21,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:13:13" (1/3) ... [2020-07-21 21:13:21,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2408d36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:21, skipping insertion in model container [2020-07-21 21:13:21,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:16" (2/3) ... [2020-07-21 21:13:21,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2408d36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:21, skipping insertion in model container [2020-07-21 21:13:21,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:21" (3/3) ... [2020-07-21 21:13:21,206 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:13:21,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:13:21,225 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:13:21,239 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:13:21,267 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:13:21,267 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:13:21,267 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:13:21,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:13:21,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:13:21,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:13:21,268 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:13:21,268 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:13:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-21 21:13:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 21:13:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:21,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:21,359 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-21 21:13:21,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:21,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127370345] [2020-07-21 21:13:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:21,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:21,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:13:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:22,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:22,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127370345] [2020-07-21 21:13:22,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:22,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:22,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171639043] [2020-07-21 21:13:22,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:22,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:22,477 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 3 states. [2020-07-21 21:13:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:22,905 INFO L93 Difference]: Finished difference Result 1974 states and 3501 transitions. [2020-07-21 21:13:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:22,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 21:13:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:22,936 INFO L225 Difference]: With dead ends: 1974 [2020-07-21 21:13:22,936 INFO L226 Difference]: Without dead ends: 1732 [2020-07-21 21:13:22,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2020-07-21 21:13:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1730. [2020-07-21 21:13:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1730 states. [2020-07-21 21:13:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2860 transitions. [2020-07-21 21:13:23,075 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2860 transitions. Word has length 496 [2020-07-21 21:13:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:23,076 INFO L479 AbstractCegarLoop]: Abstraction has 1730 states and 2860 transitions. [2020-07-21 21:13:23,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2860 transitions. [2020-07-21 21:13:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 21:13:23,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:23,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:23,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:23,306 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:23,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-21 21:13:23,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:23,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295758068] [2020-07-21 21:13:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:24,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:13:24,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:24,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:24,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295758068] [2020-07-21 21:13:24,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:24,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:24,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608700381] [2020-07-21 21:13:24,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:24,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:24,406 INFO L87 Difference]: Start difference. First operand 1730 states and 2860 transitions. Second operand 4 states. [2020-07-21 21:13:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:24,772 INFO L93 Difference]: Finished difference Result 5127 states and 8477 transitions. [2020-07-21 21:13:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:13:24,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 21:13:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:24,793 INFO L225 Difference]: With dead ends: 5127 [2020-07-21 21:13:24,793 INFO L226 Difference]: Without dead ends: 3412 [2020-07-21 21:13:24,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:13:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2020-07-21 21:13:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3410. [2020-07-21 21:13:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3410 states. [2020-07-21 21:13:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 5616 transitions. [2020-07-21 21:13:24,973 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 5616 transitions. Word has length 496 [2020-07-21 21:13:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:24,980 INFO L479 AbstractCegarLoop]: Abstraction has 3410 states and 5616 transitions. [2020-07-21 21:13:24,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 5616 transitions. [2020-07-21 21:13:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 21:13:24,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:24,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:25,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:25,211 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 598630969, now seen corresponding path program 1 times [2020-07-21 21:13:25,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:25,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670135397] [2020-07-21 21:13:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:25,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:25,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:26,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:26,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670135397] [2020-07-21 21:13:26,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:26,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:26,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889591604] [2020-07-21 21:13:26,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:26,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:26,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:26,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:26,276 INFO L87 Difference]: Start difference. First operand 3410 states and 5616 transitions. Second operand 3 states. [2020-07-21 21:13:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:26,630 INFO L93 Difference]: Finished difference Result 9907 states and 16272 transitions. [2020-07-21 21:13:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:26,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 21:13:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:26,668 INFO L225 Difference]: With dead ends: 9907 [2020-07-21 21:13:26,668 INFO L226 Difference]: Without dead ends: 6726 [2020-07-21 21:13:26,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2020-07-21 21:13:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 6724. [2020-07-21 21:13:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6724 states. [2020-07-21 21:13:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 11036 transitions. [2020-07-21 21:13:26,959 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 11036 transitions. Word has length 498 [2020-07-21 21:13:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:26,960 INFO L479 AbstractCegarLoop]: Abstraction has 6724 states and 11036 transitions. [2020-07-21 21:13:26,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 11036 transitions. [2020-07-21 21:13:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:13:26,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:26,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:27,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:27,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash 74932662, now seen corresponding path program 1 times [2020-07-21 21:13:27,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:27,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424988151] [2020-07-21 21:13:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:27,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:28,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:28,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424988151] [2020-07-21 21:13:28,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:28,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:28,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930909541] [2020-07-21 21:13:28,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:28,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:28,045 INFO L87 Difference]: Start difference. First operand 6724 states and 11036 transitions. Second operand 3 states. [2020-07-21 21:13:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:28,353 INFO L93 Difference]: Finished difference Result 19916 states and 32645 transitions. [2020-07-21 21:13:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:28,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 21:13:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:28,419 INFO L225 Difference]: With dead ends: 19916 [2020-07-21 21:13:28,419 INFO L226 Difference]: Without dead ends: 13223 [2020-07-21 21:13:28,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13223 states. [2020-07-21 21:13:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 6750. [2020-07-21 21:13:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6750 states. [2020-07-21 21:13:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6750 states to 6750 states and 11074 transitions. [2020-07-21 21:13:29,422 INFO L78 Accepts]: Start accepts. Automaton has 6750 states and 11074 transitions. Word has length 499 [2020-07-21 21:13:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:29,423 INFO L479 AbstractCegarLoop]: Abstraction has 6750 states and 11074 transitions. [2020-07-21 21:13:29,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6750 states and 11074 transitions. [2020-07-21 21:13:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 21:13:29,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:29,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:29,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:29,661 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1851088404, now seen corresponding path program 1 times [2020-07-21 21:13:29,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:29,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122287968] [2020-07-21 21:13:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:30,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:30,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:30,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122287968] [2020-07-21 21:13:30,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:30,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:30,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331911704] [2020-07-21 21:13:30,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:30,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:30,657 INFO L87 Difference]: Start difference. First operand 6750 states and 11074 transitions. Second operand 3 states. [2020-07-21 21:13:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:31,149 INFO L93 Difference]: Finished difference Result 19714 states and 32282 transitions. [2020-07-21 21:13:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:31,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 21:13:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:31,183 INFO L225 Difference]: With dead ends: 19714 [2020-07-21 21:13:31,184 INFO L226 Difference]: Without dead ends: 13276 [2020-07-21 21:13:31,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13276 states. [2020-07-21 21:13:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13276 to 13274. [2020-07-21 21:13:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13274 states. [2020-07-21 21:13:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13274 states to 13274 states and 21693 transitions. [2020-07-21 21:13:31,629 INFO L78 Accepts]: Start accepts. Automaton has 13274 states and 21693 transitions. Word has length 500 [2020-07-21 21:13:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:31,630 INFO L479 AbstractCegarLoop]: Abstraction has 13274 states and 21693 transitions. [2020-07-21 21:13:31,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 13274 states and 21693 transitions. [2020-07-21 21:13:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 21:13:31,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:31,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:31,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:31,875 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash 444801881, now seen corresponding path program 1 times [2020-07-21 21:13:31,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:31,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126093107] [2020-07-21 21:13:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:32,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1678 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:32,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:32,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:32,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126093107] [2020-07-21 21:13:32,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:32,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:32,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112496278] [2020-07-21 21:13:32,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:32,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:32,579 INFO L87 Difference]: Start difference. First operand 13274 states and 21693 transitions. Second operand 3 states. [2020-07-21 21:13:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:33,008 INFO L93 Difference]: Finished difference Result 39686 states and 64847 transitions. [2020-07-21 21:13:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:33,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 21:13:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:33,076 INFO L225 Difference]: With dead ends: 39686 [2020-07-21 21:13:33,076 INFO L226 Difference]: Without dead ends: 26476 [2020-07-21 21:13:33,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26476 states. [2020-07-21 21:13:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26476 to 13350. [2020-07-21 21:13:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13350 states. [2020-07-21 21:13:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13350 states to 13350 states and 21799 transitions. [2020-07-21 21:13:33,823 INFO L78 Accepts]: Start accepts. Automaton has 13350 states and 21799 transitions. Word has length 500 [2020-07-21 21:13:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:33,823 INFO L479 AbstractCegarLoop]: Abstraction has 13350 states and 21799 transitions. [2020-07-21 21:13:33,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 13350 states and 21799 transitions. [2020-07-21 21:13:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 21:13:33,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:33,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:34,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:34,062 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash 397975741, now seen corresponding path program 1 times [2020-07-21 21:13:34,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:34,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385756860] [2020-07-21 21:13:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:34,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:34,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:34,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385756860] [2020-07-21 21:13:34,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:34,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:34,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800479714] [2020-07-21 21:13:34,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:34,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:34,887 INFO L87 Difference]: Start difference. First operand 13350 states and 21799 transitions. Second operand 3 states. [2020-07-21 21:13:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:35,943 INFO L93 Difference]: Finished difference Result 39842 states and 65063 transitions. [2020-07-21 21:13:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:35,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 21:13:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:35,998 INFO L225 Difference]: With dead ends: 39842 [2020-07-21 21:13:35,998 INFO L226 Difference]: Without dead ends: 26568 [2020-07-21 21:13:36,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26568 states. [2020-07-21 21:13:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26568 to 13442. [2020-07-21 21:13:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13442 states. [2020-07-21 21:13:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 21925 transitions. [2020-07-21 21:13:36,648 INFO L78 Accepts]: Start accepts. Automaton has 13442 states and 21925 transitions. Word has length 501 [2020-07-21 21:13:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:36,648 INFO L479 AbstractCegarLoop]: Abstraction has 13442 states and 21925 transitions. [2020-07-21 21:13:36,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13442 states and 21925 transitions. [2020-07-21 21:13:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 21:13:36,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:36,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:36,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:36,884 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash 815858906, now seen corresponding path program 1 times [2020-07-21 21:13:36,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:36,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919018763] [2020-07-21 21:13:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:37,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:13:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:37,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:37,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919018763] [2020-07-21 21:13:37,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:37,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:13:37,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012995169] [2020-07-21 21:13:37,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:13:37,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:13:37,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:13:37,666 INFO L87 Difference]: Start difference. First operand 13442 states and 21925 transitions. Second operand 9 states. [2020-07-21 21:13:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:49,444 INFO L93 Difference]: Finished difference Result 101669 states and 165041 transitions. [2020-07-21 21:13:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:13:49,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 502 [2020-07-21 21:13:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:49,590 INFO L225 Difference]: With dead ends: 101669 [2020-07-21 21:13:49,590 INFO L226 Difference]: Without dead ends: 98631 [2020-07-21 21:13:49,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:13:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98631 states. [2020-07-21 21:13:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98631 to 32504. [2020-07-21 21:13:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32504 states. [2020-07-21 21:13:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32504 states to 32504 states and 52579 transitions. [2020-07-21 21:13:52,500 INFO L78 Accepts]: Start accepts. Automaton has 32504 states and 52579 transitions. Word has length 502 [2020-07-21 21:13:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:52,501 INFO L479 AbstractCegarLoop]: Abstraction has 32504 states and 52579 transitions. [2020-07-21 21:13:52,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:13:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 32504 states and 52579 transitions. [2020-07-21 21:13:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 21:13:52,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:52,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:52,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:52,733 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1949345144, now seen corresponding path program 1 times [2020-07-21 21:13:52,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:52,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775166059] [2020-07-21 21:13:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:53,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:53,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:13:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:53,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:53,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775166059] [2020-07-21 21:13:53,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:53,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:13:53,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077460486] [2020-07-21 21:13:53,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:13:53,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:13:53,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:13:53,959 INFO L87 Difference]: Start difference. First operand 32504 states and 52579 transitions. Second operand 8 states. [2020-07-21 21:13:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:58,592 INFO L93 Difference]: Finished difference Result 56737 states and 91996 transitions. [2020-07-21 21:13:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:13:58,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 502 [2020-07-21 21:13:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:58,660 INFO L225 Difference]: With dead ends: 56737 [2020-07-21 21:13:58,660 INFO L226 Difference]: Without dead ends: 41191 [2020-07-21 21:13:58,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 21:13:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41191 states. [2020-07-21 21:13:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41191 to 18106. [2020-07-21 21:13:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18106 states. [2020-07-21 21:13:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18106 states to 18106 states and 29189 transitions. [2020-07-21 21:13:59,927 INFO L78 Accepts]: Start accepts. Automaton has 18106 states and 29189 transitions. Word has length 502 [2020-07-21 21:13:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:59,928 INFO L479 AbstractCegarLoop]: Abstraction has 18106 states and 29189 transitions. [2020-07-21 21:13:59,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:13:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18106 states and 29189 transitions. [2020-07-21 21:13:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 21:13:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:59,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:14:00,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:00,142 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash -600161981, now seen corresponding path program 1 times [2020-07-21 21:14:00,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:00,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643422357] [2020-07-21 21:14:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:00,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:14:00,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:01,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:01,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643422357] [2020-07-21 21:14:01,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:01,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:01,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225584018] [2020-07-21 21:14:01,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:01,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:01,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:01,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:01,016 INFO L87 Difference]: Start difference. First operand 18106 states and 29189 transitions. Second operand 3 states. [2020-07-21 21:14:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:02,381 INFO L93 Difference]: Finished difference Result 36710 states and 58767 transitions. [2020-07-21 21:14:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:14:02,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 21:14:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:02,410 INFO L225 Difference]: With dead ends: 36710 [2020-07-21 21:14:02,410 INFO L226 Difference]: Without dead ends: 23072 [2020-07-21 21:14:02,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23072 states. [2020-07-21 21:14:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23072 to 20846. [2020-07-21 21:14:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20846 states. [2020-07-21 21:14:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20846 states to 20846 states and 33693 transitions. [2020-07-21 21:14:03,509 INFO L78 Accepts]: Start accepts. Automaton has 20846 states and 33693 transitions. Word has length 502 [2020-07-21 21:14:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:03,509 INFO L479 AbstractCegarLoop]: Abstraction has 20846 states and 33693 transitions. [2020-07-21 21:14:03,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:14:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 20846 states and 33693 transitions. [2020-07-21 21:14:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 21:14:03,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:03,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:14:03,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:03,722 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -940914161, now seen corresponding path program 1 times [2020-07-21 21:14:03,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:03,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780607311] [2020-07-21 21:14:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:04,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:14:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:04,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:04,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780607311] [2020-07-21 21:14:04,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:04,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:04,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543534101] [2020-07-21 21:14:04,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:04,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:04,831 INFO L87 Difference]: Start difference. First operand 20846 states and 33693 transitions. Second operand 3 states. [2020-07-21 21:14:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:07,647 INFO L93 Difference]: Finished difference Result 60737 states and 98012 transitions. [2020-07-21 21:14:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:14:07,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 21:14:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:07,686 INFO L225 Difference]: With dead ends: 60737 [2020-07-21 21:14:07,686 INFO L226 Difference]: Without dead ends: 40799 [2020-07-21 21:14:07,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40799 states. [2020-07-21 21:14:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40799 to 40797. [2020-07-21 21:14:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40797 states. [2020-07-21 21:14:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40797 states to 40797 states and 65696 transitions. [2020-07-21 21:14:09,781 INFO L78 Accepts]: Start accepts. Automaton has 40797 states and 65696 transitions. Word has length 502 [2020-07-21 21:14:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:09,782 INFO L479 AbstractCegarLoop]: Abstraction has 40797 states and 65696 transitions. [2020-07-21 21:14:09,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:14:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 40797 states and 65696 transitions. [2020-07-21 21:14:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 21:14:09,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:09,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:14:10,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:10,020 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash 227329196, now seen corresponding path program 1 times [2020-07-21 21:14:10,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:10,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142937020] [2020-07-21 21:14:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:10,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:10,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:14:10,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:10,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:10,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142937020] [2020-07-21 21:14:10,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:10,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:14:10,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540518147] [2020-07-21 21:14:10,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:14:10,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:14:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:14:10,657 INFO L87 Difference]: Start difference. First operand 40797 states and 65696 transitions. Second operand 4 states. [2020-07-21 21:14:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:15,128 INFO L93 Difference]: Finished difference Result 117120 states and 187983 transitions. [2020-07-21 21:14:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:14:15,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 21:14:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:15,209 INFO L225 Difference]: With dead ends: 117120 [2020-07-21 21:14:15,209 INFO L226 Difference]: Without dead ends: 78526 [2020-07-21 21:14:15,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:14:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78526 states. [2020-07-21 21:14:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78526 to 42138. [2020-07-21 21:14:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42138 states. [2020-07-21 21:14:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42138 states to 42138 states and 68080 transitions. [2020-07-21 21:14:19,021 INFO L78 Accepts]: Start accepts. Automaton has 42138 states and 68080 transitions. Word has length 502 [2020-07-21 21:14:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:19,021 INFO L479 AbstractCegarLoop]: Abstraction has 42138 states and 68080 transitions. [2020-07-21 21:14:19,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:14:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42138 states and 68080 transitions. [2020-07-21 21:14:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 21:14:19,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:19,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:14:19,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:19,265 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash -980640222, now seen corresponding path program 1 times [2020-07-21 21:14:19,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:19,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402878433] [2020-07-21 21:14:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:19,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:14:19,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:14:19,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:20,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:20,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402878433] [2020-07-21 21:14:20,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:20,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:14:20,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466332753] [2020-07-21 21:14:20,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:14:20,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:14:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:14:20,180 INFO L87 Difference]: Start difference. First operand 42138 states and 68080 transitions. Second operand 9 states. [2020-07-21 21:14:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:43,304 INFO L93 Difference]: Finished difference Result 238439 states and 383814 transitions. [2020-07-21 21:14:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 21:14:43,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 504 [2020-07-21 21:14:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:43,622 INFO L225 Difference]: With dead ends: 238439 [2020-07-21 21:14:43,622 INFO L226 Difference]: Without dead ends: 225661 [2020-07-21 21:14:43,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=995, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 21:14:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225661 states. [2020-07-21 21:14:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225661 to 87726. [2020-07-21 21:14:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87726 states. [2020-07-21 21:14:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87726 states to 87726 states and 140724 transitions. [2020-07-21 21:14:50,747 INFO L78 Accepts]: Start accepts. Automaton has 87726 states and 140724 transitions. Word has length 504 [2020-07-21 21:14:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:50,747 INFO L479 AbstractCegarLoop]: Abstraction has 87726 states and 140724 transitions. [2020-07-21 21:14:50,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:14:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 87726 states and 140724 transitions. [2020-07-21 21:14:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 21:14:50,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:50,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:14:50,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:50,978 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2126461271, now seen corresponding path program 1 times [2020-07-21 21:14:50,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:50,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948152842] [2020-07-21 21:14:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:51,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:14:51,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:51,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:51,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948152842] [2020-07-21 21:14:51,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:51,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:51,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044042835] [2020-07-21 21:14:51,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:51,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:51,877 INFO L87 Difference]: Start difference. First operand 87726 states and 140724 transitions. Second operand 3 states. [2020-07-21 21:15:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:15:03,282 INFO L93 Difference]: Finished difference Result 204638 states and 328206 transitions. [2020-07-21 21:15:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:15:03,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 21:15:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:15:03,435 INFO L225 Difference]: With dead ends: 204638 [2020-07-21 21:15:03,435 INFO L226 Difference]: Without dead ends: 127120 [2020-07-21 21:15:03,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:15:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127120 states. [2020-07-21 21:15:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127120 to 115662. [2020-07-21 21:15:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115662 states. [2020-07-21 21:15:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115662 states to 115662 states and 185152 transitions. [2020-07-21 21:15:15,018 INFO L78 Accepts]: Start accepts. Automaton has 115662 states and 185152 transitions. Word has length 504 [2020-07-21 21:15:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:15,018 INFO L479 AbstractCegarLoop]: Abstraction has 115662 states and 185152 transitions. [2020-07-21 21:15:15,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:15:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 115662 states and 185152 transitions. [2020-07-21 21:15:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 21:15:15,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:15,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:15:15,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:15,252 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash 359846569, now seen corresponding path program 1 times [2020-07-21 21:15:15,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:15,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462984311] [2020-07-21 21:15:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:15,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:15:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:15:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:15:16,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:16,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462984311] [2020-07-21 21:15:16,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:16,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:15:16,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236460990] [2020-07-21 21:15:16,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:15:16,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:16,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:15:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:15:16,396 INFO L87 Difference]: Start difference. First operand 115662 states and 185152 transitions. Second operand 5 states. [2020-07-21 21:15:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:15:35,376 INFO L93 Difference]: Finished difference Result 302158 states and 484102 transitions. [2020-07-21 21:15:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:15:35,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-21 21:15:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:15:35,710 INFO L225 Difference]: With dead ends: 302158 [2020-07-21 21:15:35,711 INFO L226 Difference]: Without dead ends: 219252 [2020-07-21 21:15:35,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:15:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219252 states. [2020-07-21 21:15:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219252 to 219250. [2020-07-21 21:15:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219250 states. [2020-07-21 21:15:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219250 states to 219250 states and 349708 transitions. [2020-07-21 21:15:56,835 INFO L78 Accepts]: Start accepts. Automaton has 219250 states and 349708 transitions. Word has length 505 [2020-07-21 21:15:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:56,836 INFO L479 AbstractCegarLoop]: Abstraction has 219250 states and 349708 transitions. [2020-07-21 21:15:56,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:15:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 219250 states and 349708 transitions. [2020-07-21 21:15:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 21:15:56,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:56,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:15:57,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:57,085 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:57,086 INFO L82 PathProgramCache]: Analyzing trace with hash -69343826, now seen corresponding path program 1 times [2020-07-21 21:15:57,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:57,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884558364] [2020-07-21 21:15:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:57,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:15:57,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:57,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:15:57,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:15:58,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:58,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884558364] [2020-07-21 21:15:58,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:58,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:15:58,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629314011] [2020-07-21 21:15:58,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:15:58,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:15:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:15:58,072 INFO L87 Difference]: Start difference. First operand 219250 states and 349708 transitions. Second operand 4 states. [2020-07-21 21:16:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:16:36,528 INFO L93 Difference]: Finished difference Result 651468 states and 1038838 transitions. [2020-07-21 21:16:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:16:36,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 21:16:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:16:37,172 INFO L225 Difference]: With dead ends: 651468 [2020-07-21 21:16:37,173 INFO L226 Difference]: Without dead ends: 433300 [2020-07-21 21:16:37,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:16:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433300 states. [2020-07-21 21:17:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433300 to 433298. [2020-07-21 21:17:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433298 states. [2020-07-21 21:17:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433298 states to 433298 states and 689062 transitions. [2020-07-21 21:17:24,744 INFO L78 Accepts]: Start accepts. Automaton has 433298 states and 689062 transitions. Word has length 505 [2020-07-21 21:17:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:17:24,745 INFO L479 AbstractCegarLoop]: Abstraction has 433298 states and 689062 transitions. [2020-07-21 21:17:24,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:17:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 433298 states and 689062 transitions. [2020-07-21 21:17:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 21:17:24,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:17:24,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:17:25,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:17:25,078 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:17:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:17:25,079 INFO L82 PathProgramCache]: Analyzing trace with hash 304002454, now seen corresponding path program 1 times [2020-07-21 21:17:25,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:17:25,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57253921] [2020-07-21 21:17:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:17:25,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:17:25,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:17:25,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:17:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:17:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:17:25,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:17:25,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57253921] [2020-07-21 21:17:25,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:17:25,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:17:25,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977801907] [2020-07-21 21:17:25,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:17:25,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:17:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:17:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:17:25,687 INFO L87 Difference]: Start difference. First operand 433298 states and 689062 transitions. Second operand 3 states. [2020-07-21 21:18:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:18:52,360 INFO L93 Difference]: Finished difference Result 1287521 states and 2044870 transitions. [2020-07-21 21:18:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:18:52,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 21:18:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:18:53,668 INFO L225 Difference]: With dead ends: 1287521 [2020-07-21 21:18:53,668 INFO L226 Difference]: Without dead ends: 860424 [2020-07-21 21:18:53,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:18:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860424 states. [2020-07-21 21:19:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860424 to 434242. [2020-07-21 21:19:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434242 states. [2020-07-21 21:19:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434242 states to 434242 states and 690457 transitions. [2020-07-21 21:19:57,201 INFO L78 Accepts]: Start accepts. Automaton has 434242 states and 690457 transitions. Word has length 507 [2020-07-21 21:19:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:19:57,202 INFO L479 AbstractCegarLoop]: Abstraction has 434242 states and 690457 transitions. [2020-07-21 21:19:57,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:19:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 434242 states and 690457 transitions. [2020-07-21 21:19:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 21:19:57,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:19:57,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:19:57,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:19:57,501 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:19:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:19:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 490851249, now seen corresponding path program 1 times [2020-07-21 21:19:57,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:19:57,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226360708] [2020-07-21 21:19:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:19:58,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:19:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:19:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:19:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:19:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:19:58,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:19:58,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226360708] [2020-07-21 21:19:58,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:19:58,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:19:58,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538584479] [2020-07-21 21:19:58,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:19:58,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:19:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:19:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:19:58,466 INFO L87 Difference]: Start difference. First operand 434242 states and 690457 transitions. Second operand 3 states. [2020-07-21 21:21:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:21:26,675 INFO L93 Difference]: Finished difference Result 1285767 states and 2043988 transitions. [2020-07-21 21:21:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:21:26,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 21:21:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:21:28,025 INFO L225 Difference]: With dead ends: 1285767 [2020-07-21 21:21:28,026 INFO L226 Difference]: Without dead ends: 855417 [2020-07-21 21:21:28,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:21:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855417 states. [2020-07-21 21:23:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855417 to 855415. [2020-07-21 21:23:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855415 states. [2020-07-21 21:23:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855415 states to 855415 states and 1356644 transitions. [2020-07-21 21:23:17,493 INFO L78 Accepts]: Start accepts. Automaton has 855415 states and 1356644 transitions. Word has length 507 [2020-07-21 21:23:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:23:17,493 INFO L479 AbstractCegarLoop]: Abstraction has 855415 states and 1356644 transitions. [2020-07-21 21:23:17,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:23:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 855415 states and 1356644 transitions. [2020-07-21 21:23:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 21:23:17,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:23:17,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:23:17,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:23:17,937 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:23:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:23:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash -474259123, now seen corresponding path program 1 times [2020-07-21 21:23:17,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:23:17,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273728602] [2020-07-21 21:23:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:23:18,642 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:23:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:23:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:23:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:23:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:23:18,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:23:18,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273728602] [2020-07-21 21:23:18,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:23:18,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:23:18,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924817454] [2020-07-21 21:23:18,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:23:18,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:23:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:23:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:23:18,762 INFO L87 Difference]: Start difference. First operand 855415 states and 1356644 transitions. Second operand 3 states.