/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:10:17,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:10:17,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:10:17,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:10:17,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:10:17,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:10:17,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:10:17,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:10:17,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:10:17,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:10:17,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:10:17,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:10:17,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:10:17,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:10:17,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:10:17,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:10:17,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:10:17,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:10:17,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:10:17,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:10:17,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:10:17,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:10:17,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:10:17,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:10:17,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 23:10:17,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 23:10:17,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 23:10:17,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 23:10:17,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 23:10:17,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 23:10:17,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:10:17,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:10:17,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:10:17,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 23:10:17,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:10:17,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:10:17,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:10:17,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:10:17,752 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:10:17,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:10:17,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:10:17,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:10:17,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:10:17,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:10:17,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:10:17,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:10:17,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:10:17,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:10:17,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:10:17,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:10:17,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:10:17,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:10:17,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:10:17,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:10:17,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:10:17,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:10:17,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:10:17,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:10:17,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:10:17,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:10:17,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:17,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:10:17,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:10:17,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:10:18,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:10:18,103 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:10:18,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:10:18,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:10:18,108 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:10:18,109 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 23:10:18,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789896b59/472bfb85e91542d0a1cf8915aef7532b/FLAG76b04dc7d [2020-07-20 23:10:18,934 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:10:18,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 23:10:18,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789896b59/472bfb85e91542d0a1cf8915aef7532b/FLAG76b04dc7d [2020-07-20 23:10:19,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789896b59/472bfb85e91542d0a1cf8915aef7532b [2020-07-20 23:10:19,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:10:19,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:10:19,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:10:19,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:10:19,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:10:19,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:10:19" (1/1) ... [2020-07-20 23:10:19,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e09eb47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:19, skipping insertion in model container [2020-07-20 23:10:19,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:10:19" (1/1) ... [2020-07-20 23:10:19,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:10:19,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:10:21,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:10:21,100 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:10:22,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:10:22,770 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:10:22,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22 WrapperNode [2020-07-20 23:10:22,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:10:22,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:10:22,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:10:22,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:10:22,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... [2020-07-20 23:10:22,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:10:22,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:10:22,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:10:22,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:10:22,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:10:23,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:10:23,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:10:23,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:10:23,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:10:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:10:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:10:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:10:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:10:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:10:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:10:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:10:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:10:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:10:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:10:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:10:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:10:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 23:10:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:10:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:10:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:10:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:10:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:10:27,248 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:10:27,248 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:10:27,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:10:27 BoogieIcfgContainer [2020-07-20 23:10:27,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:10:27,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:10:27,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:10:27,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:10:27,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:10:19" (1/3) ... [2020-07-20 23:10:27,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1123d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:10:27, skipping insertion in model container [2020-07-20 23:10:27,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:10:22" (2/3) ... [2020-07-20 23:10:27,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1123d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:10:27, skipping insertion in model container [2020-07-20 23:10:27,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:10:27" (3/3) ... [2020-07-20 23:10:27,269 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 23:10:27,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:10:27,289 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 23:10:27,302 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 23:10:27,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:10:27,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:10:27,333 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:10:27,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:10:27,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:10:27,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:10:27,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:10:27,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:10:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-20 23:10:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 23:10:27,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:27,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:27,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-20 23:10:27,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:27,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521212270] [2020-07-20 23:10:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:28,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:28,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:28,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:28,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:28,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521212270] [2020-07-20 23:10:28,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:28,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:28,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638513405] [2020-07-20 23:10:28,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:28,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:28,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:28,603 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-20 23:10:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:29,102 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-20 23:10:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:10:29,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 23:10:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:29,138 INFO L225 Difference]: With dead ends: 4394 [2020-07-20 23:10:29,138 INFO L226 Difference]: Without dead ends: 2919 [2020-07-20 23:10:29,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:10:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-20 23:10:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-20 23:10:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-20 23:10:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-20 23:10:29,355 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-20 23:10:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:29,356 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-20 23:10:29,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-20 23:10:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 23:10:29,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:29,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:29,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:29,587 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-20 23:10:29,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:29,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409463301] [2020-07-20 23:10:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:30,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:30,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:30,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:30,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409463301] [2020-07-20 23:10:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:30,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:30,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95737334] [2020-07-20 23:10:30,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:30,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:30,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:30,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:30,338 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states. [2020-07-20 23:10:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:30,780 INFO L93 Difference]: Finished difference Result 8502 states and 14010 transitions. [2020-07-20 23:10:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:10:30,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-20 23:10:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:30,812 INFO L225 Difference]: With dead ends: 8502 [2020-07-20 23:10:30,812 INFO L226 Difference]: Without dead ends: 5655 [2020-07-20 23:10:30,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:10:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2020-07-20 23:10:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5612. [2020-07-20 23:10:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2020-07-20 23:10:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 9213 transitions. [2020-07-20 23:10:31,092 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 9213 transitions. Word has length 486 [2020-07-20 23:10:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:31,093 INFO L479 AbstractCegarLoop]: Abstraction has 5612 states and 9213 transitions. [2020-07-20 23:10:31,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 9213 transitions. [2020-07-20 23:10:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 23:10:31,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:31,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:31,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:31,332 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:31,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1313216099, now seen corresponding path program 1 times [2020-07-20 23:10:31,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:31,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792742899] [2020-07-20 23:10:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:31,766 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:31,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:32,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:32,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792742899] [2020-07-20 23:10:32,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:32,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:32,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212560659] [2020-07-20 23:10:32,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:32,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:32,079 INFO L87 Difference]: Start difference. First operand 5612 states and 9213 transitions. Second operand 4 states. [2020-07-20 23:10:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:32,679 INFO L93 Difference]: Finished difference Result 16514 states and 27084 transitions. [2020-07-20 23:10:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:10:32,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 23:10:32,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:32,750 INFO L225 Difference]: With dead ends: 16514 [2020-07-20 23:10:32,751 INFO L226 Difference]: Without dead ends: 11020 [2020-07-20 23:10:32,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:10:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11020 states. [2020-07-20 23:10:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11020 to 10979. [2020-07-20 23:10:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10979 states. [2020-07-20 23:10:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 17936 transitions. [2020-07-20 23:10:33,206 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 17936 transitions. Word has length 490 [2020-07-20 23:10:33,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:33,207 INFO L479 AbstractCegarLoop]: Abstraction has 10979 states and 17936 transitions. [2020-07-20 23:10:33,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 17936 transitions. [2020-07-20 23:10:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 23:10:33,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:33,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:33,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:33,452 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 152977571, now seen corresponding path program 1 times [2020-07-20 23:10:33,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:33,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014496170] [2020-07-20 23:10:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:33,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:34,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:34,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014496170] [2020-07-20 23:10:34,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:34,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:34,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094034594] [2020-07-20 23:10:34,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:34,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:34,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:34,093 INFO L87 Difference]: Start difference. First operand 10979 states and 17936 transitions. Second operand 3 states. [2020-07-20 23:10:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:34,692 INFO L93 Difference]: Finished difference Result 32527 states and 53096 transitions. [2020-07-20 23:10:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:10:34,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-20 23:10:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:34,790 INFO L225 Difference]: With dead ends: 32527 [2020-07-20 23:10:34,790 INFO L226 Difference]: Without dead ends: 21757 [2020-07-20 23:10:34,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21757 states. [2020-07-20 23:10:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21757 to 11079. [2020-07-20 23:10:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11079 states. [2020-07-20 23:10:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 18088 transitions. [2020-07-20 23:10:35,986 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 18088 transitions. Word has length 493 [2020-07-20 23:10:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:35,986 INFO L479 AbstractCegarLoop]: Abstraction has 11079 states and 18088 transitions. [2020-07-20 23:10:35,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:10:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 18088 transitions. [2020-07-20 23:10:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-20 23:10:36,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:36,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:36,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:36,229 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:36,230 INFO L82 PathProgramCache]: Analyzing trace with hash 843314476, now seen corresponding path program 1 times [2020-07-20 23:10:36,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:36,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176363367] [2020-07-20 23:10:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:36,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:36,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:37,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:37,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176363367] [2020-07-20 23:10:37,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:37,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:37,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816947802] [2020-07-20 23:10:37,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:37,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:37,031 INFO L87 Difference]: Start difference. First operand 11079 states and 18088 transitions. Second operand 4 states. [2020-07-20 23:10:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:37,829 INFO L93 Difference]: Finished difference Result 32920 states and 53730 transitions. [2020-07-20 23:10:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:10:37,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-20 23:10:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:37,888 INFO L225 Difference]: With dead ends: 32920 [2020-07-20 23:10:37,888 INFO L226 Difference]: Without dead ends: 21878 [2020-07-20 23:10:37,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:10:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21878 states. [2020-07-20 23:10:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21878 to 21846. [2020-07-20 23:10:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21846 states. [2020-07-20 23:10:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21846 states to 21846 states and 35508 transitions. [2020-07-20 23:10:38,912 INFO L78 Accepts]: Start accepts. Automaton has 21846 states and 35508 transitions. Word has length 494 [2020-07-20 23:10:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:38,913 INFO L479 AbstractCegarLoop]: Abstraction has 21846 states and 35508 transitions. [2020-07-20 23:10:38,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21846 states and 35508 transitions. [2020-07-20 23:10:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 23:10:38,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:38,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:39,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:39,167 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:39,168 INFO L82 PathProgramCache]: Analyzing trace with hash 879804404, now seen corresponding path program 1 times [2020-07-20 23:10:39,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:39,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59563949] [2020-07-20 23:10:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:39,510 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:10:39,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:39,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:39,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59563949] [2020-07-20 23:10:39,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:39,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:39,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349877852] [2020-07-20 23:10:39,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:39,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:39,663 INFO L87 Difference]: Start difference. First operand 21846 states and 35508 transitions. Second operand 3 states. [2020-07-20 23:10:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:41,707 INFO L93 Difference]: Finished difference Result 65357 states and 106231 transitions. [2020-07-20 23:10:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:10:41,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 23:10:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:41,863 INFO L225 Difference]: With dead ends: 65357 [2020-07-20 23:10:41,863 INFO L226 Difference]: Without dead ends: 43595 [2020-07-20 23:10:41,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43595 states. [2020-07-20 23:10:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43595 to 21925. [2020-07-20 23:10:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21925 states. [2020-07-20 23:10:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21925 states to 21925 states and 35612 transitions. [2020-07-20 23:10:42,941 INFO L78 Accepts]: Start accepts. Automaton has 21925 states and 35612 transitions. Word has length 497 [2020-07-20 23:10:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:42,941 INFO L479 AbstractCegarLoop]: Abstraction has 21925 states and 35612 transitions. [2020-07-20 23:10:42,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:10:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21925 states and 35612 transitions. [2020-07-20 23:10:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 23:10:42,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:42,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:43,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:43,183 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash 995012017, now seen corresponding path program 1 times [2020-07-20 23:10:43,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:43,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311968373] [2020-07-20 23:10:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:43,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:10:43,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:10:43,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:43,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:43,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311968373] [2020-07-20 23:10:43,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:43,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:10:43,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042213611] [2020-07-20 23:10:43,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:10:43,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:10:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:10:43,797 INFO L87 Difference]: Start difference. First operand 21925 states and 35612 transitions. Second operand 9 states. [2020-07-20 23:10:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:56,670 INFO L93 Difference]: Finished difference Result 138956 states and 223187 transitions. [2020-07-20 23:10:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:10:56,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 497 [2020-07-20 23:10:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:56,824 INFO L225 Difference]: With dead ends: 138956 [2020-07-20 23:10:56,824 INFO L226 Difference]: Without dead ends: 135165 [2020-07-20 23:10:56,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:10:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135165 states. [2020-07-20 23:10:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135165 to 47049. [2020-07-20 23:10:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47049 states. [2020-07-20 23:10:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47049 states to 47049 states and 75548 transitions. [2020-07-20 23:10:59,078 INFO L78 Accepts]: Start accepts. Automaton has 47049 states and 75548 transitions. Word has length 497 [2020-07-20 23:10:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:59,079 INFO L479 AbstractCegarLoop]: Abstraction has 47049 states and 75548 transitions. [2020-07-20 23:10:59,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:10:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 47049 states and 75548 transitions. [2020-07-20 23:10:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 23:10:59,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:59,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:59,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:59,316 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1845767943, now seen corresponding path program 1 times [2020-07-20 23:10:59,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:59,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745037699] [2020-07-20 23:10:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:59,719 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:59,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:59,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:59,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745037699] [2020-07-20 23:10:59,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:59,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:59,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151451026] [2020-07-20 23:10:59,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:59,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:59,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:59,867 INFO L87 Difference]: Start difference. First operand 47049 states and 75548 transitions. Second operand 3 states. [2020-07-20 23:11:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:03,033 INFO L93 Difference]: Finished difference Result 105210 states and 168210 transitions. [2020-07-20 23:11:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:03,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 23:11:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:03,118 INFO L225 Difference]: With dead ends: 105210 [2020-07-20 23:11:03,118 INFO L226 Difference]: Without dead ends: 66923 [2020-07-20 23:11:03,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66923 states. [2020-07-20 23:11:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66923 to 55761. [2020-07-20 23:11:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55761 states. [2020-07-20 23:11:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55761 states to 55761 states and 90028 transitions. [2020-07-20 23:11:05,349 INFO L78 Accepts]: Start accepts. Automaton has 55761 states and 90028 transitions. Word has length 497 [2020-07-20 23:11:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:05,350 INFO L479 AbstractCegarLoop]: Abstraction has 55761 states and 90028 transitions. [2020-07-20 23:11:05,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 55761 states and 90028 transitions. [2020-07-20 23:11:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 23:11:05,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:05,394 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] [2020-07-20 23:11:05,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:05,611 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -899247254, now seen corresponding path program 1 times [2020-07-20 23:11:05,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:05,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847210383] [2020-07-20 23:11:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:05,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:05,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:11:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:06,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:06,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847210383] [2020-07-20 23:11:06,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:06,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:06,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384658332] [2020-07-20 23:11:06,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:06,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:06,470 INFO L87 Difference]: Start difference. First operand 55761 states and 90028 transitions. Second operand 4 states. [2020-07-20 23:11:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:12,219 INFO L93 Difference]: Finished difference Result 164817 states and 266013 transitions. [2020-07-20 23:11:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:12,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 23:11:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:12,349 INFO L225 Difference]: With dead ends: 164817 [2020-07-20 23:11:12,349 INFO L226 Difference]: Without dead ends: 109762 [2020-07-20 23:11:12,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109762 states. [2020-07-20 23:11:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109762 to 109736. [2020-07-20 23:11:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109736 states. [2020-07-20 23:11:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109736 states to 109736 states and 176447 transitions. [2020-07-20 23:11:17,078 INFO L78 Accepts]: Start accepts. Automaton has 109736 states and 176447 transitions. Word has length 500 [2020-07-20 23:11:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:17,079 INFO L479 AbstractCegarLoop]: Abstraction has 109736 states and 176447 transitions. [2020-07-20 23:11:17,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 109736 states and 176447 transitions. [2020-07-20 23:11:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 23:11:17,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:17,145 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] [2020-07-20 23:11:17,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:17,351 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2072406157, now seen corresponding path program 1 times [2020-07-20 23:11:17,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:17,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466299484] [2020-07-20 23:11:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:17,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:11:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:18,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:18,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466299484] [2020-07-20 23:11:18,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:18,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:18,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407463300] [2020-07-20 23:11:18,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:18,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:18,022 INFO L87 Difference]: Start difference. First operand 109736 states and 176447 transitions. Second operand 3 states. [2020-07-20 23:11:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:27,623 INFO L93 Difference]: Finished difference Result 322957 states and 518874 transitions. [2020-07-20 23:11:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:27,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 23:11:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:27,895 INFO L225 Difference]: With dead ends: 322957 [2020-07-20 23:11:27,895 INFO L226 Difference]: Without dead ends: 215924 [2020-07-20 23:11:27,994 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 [2020-07-20 23:11:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215924 states. [2020-07-20 23:11:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215924 to 215861. [2020-07-20 23:11:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215861 states. [2020-07-20 23:11:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215861 states to 215861 states and 345886 transitions. [2020-07-20 23:11:40,513 INFO L78 Accepts]: Start accepts. Automaton has 215861 states and 345886 transitions. Word has length 500 [2020-07-20 23:11:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:40,514 INFO L479 AbstractCegarLoop]: Abstraction has 215861 states and 345886 transitions. [2020-07-20 23:11:40,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 215861 states and 345886 transitions. [2020-07-20 23:11:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 23:11:40,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:40,654 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] [2020-07-20 23:11:40,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:40,855 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash -836386222, now seen corresponding path program 1 times [2020-07-20 23:11:40,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:40,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860549879] [2020-07-20 23:11:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:41,197 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:11:41,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:41,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:41,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860549879] [2020-07-20 23:11:41,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:41,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:41,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367580872] [2020-07-20 23:11:41,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:41,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:41,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:41,340 INFO L87 Difference]: Start difference. First operand 215861 states and 345886 transitions. Second operand 3 states. [2020-07-20 23:12:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:05,282 INFO L93 Difference]: Finished difference Result 645055 states and 1033520 transitions. [2020-07-20 23:12:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:12:05,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 23:12:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:05,907 INFO L225 Difference]: With dead ends: 645055 [2020-07-20 23:12:05,907 INFO L226 Difference]: Without dead ends: 430460 [2020-07-20 23:12:06,121 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 [2020-07-20 23:12:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430460 states. [2020-07-20 23:12:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430460 to 216825. [2020-07-20 23:12:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216825 states. [2020-07-20 23:12:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216825 states to 216825 states and 347204 transitions. [2020-07-20 23:12:18,095 INFO L78 Accepts]: Start accepts. Automaton has 216825 states and 347204 transitions. Word has length 500 [2020-07-20 23:12:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:18,095 INFO L479 AbstractCegarLoop]: Abstraction has 216825 states and 347204 transitions. [2020-07-20 23:12:18,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:12:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 216825 states and 347204 transitions. [2020-07-20 23:12:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 23:12:18,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:18,223 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] [2020-07-20 23:12:18,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:18,436 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1247664360, now seen corresponding path program 1 times [2020-07-20 23:12:18,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:18,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249333928] [2020-07-20 23:12:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:19,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:12:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:19,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:19,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249333928] [2020-07-20 23:12:19,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:19,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:19,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430985073] [2020-07-20 23:12:19,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:19,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:19,787 INFO L87 Difference]: Start difference. First operand 216825 states and 347204 transitions. Second operand 3 states. [2020-07-20 23:12:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:41,929 INFO L93 Difference]: Finished difference Result 633925 states and 1013598 transitions. [2020-07-20 23:12:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:12:41,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 23:12:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:42,475 INFO L225 Difference]: With dead ends: 633925 [2020-07-20 23:12:42,475 INFO L226 Difference]: Without dead ends: 424242 [2020-07-20 23:12:42,672 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 [2020-07-20 23:12:42,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424242 states. [2020-07-20 23:13:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424242 to 423599. [2020-07-20 23:13:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423599 states. [2020-07-20 23:13:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423599 states to 423599 states and 674976 transitions. [2020-07-20 23:13:13,526 INFO L78 Accepts]: Start accepts. Automaton has 423599 states and 674976 transitions. Word has length 500 [2020-07-20 23:13:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:13:13,527 INFO L479 AbstractCegarLoop]: Abstraction has 423599 states and 674976 transitions. [2020-07-20 23:13:13,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:13:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 423599 states and 674976 transitions. [2020-07-20 23:13:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 23:13:13,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:13:13,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:13:14,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:14,082 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:13:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:13:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1233017015, now seen corresponding path program 1 times [2020-07-20 23:13:14,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:13:14,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12235026] [2020-07-20 23:13:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:14,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:13:14,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:13:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:13:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:13:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:13:14,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:13:14,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12235026] [2020-07-20 23:13:14,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:13:14,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:13:14,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217797092] [2020-07-20 23:13:14,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:13:14,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:13:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:13:14,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:13:14,598 INFO L87 Difference]: Start difference. First operand 423599 states and 674976 transitions. Second operand 3 states. [2020-07-20 23:14:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:14:10,145 INFO L93 Difference]: Finished difference Result 1266343 states and 2017978 transitions. [2020-07-20 23:14:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:14:10,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 23:14:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:14:12,034 INFO L225 Difference]: With dead ends: 1266343 [2020-07-20 23:14:12,034 INFO L226 Difference]: Without dead ends: 844592 [2020-07-20 23:14:12,445 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 [2020-07-20 23:14:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844592 states. [2020-07-20 23:14:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844592 to 425485. [2020-07-20 23:14:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425485 states. [2020-07-20 23:14:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425485 states to 425485 states and 677556 transitions. [2020-07-20 23:14:48,806 INFO L78 Accepts]: Start accepts. Automaton has 425485 states and 677556 transitions. Word has length 501 [2020-07-20 23:14:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:14:48,806 INFO L479 AbstractCegarLoop]: Abstraction has 425485 states and 677556 transitions. [2020-07-20 23:14:48,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:14:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 425485 states and 677556 transitions. [2020-07-20 23:14:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 23:14:49,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:14:49,115 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] [2020-07-20 23:14:49,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:14:49,322 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:14:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:14:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2117521530, now seen corresponding path program 1 times [2020-07-20 23:14:49,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:14:49,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208706734] [2020-07-20 23:14:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:14:49,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:14:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:14:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:14:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:14:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:14:49,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:14:49,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208706734] [2020-07-20 23:14:49,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:14:49,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:14:49,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392600495] [2020-07-20 23:14:49,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:14:49,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:14:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:14:49,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:14:49,848 INFO L87 Difference]: Start difference. First operand 425485 states and 677556 transitions. Second operand 3 states. [2020-07-20 23:15:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:15:32,589 INFO L93 Difference]: Finished difference Result 894223 states and 1421635 transitions. [2020-07-20 23:15:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:15:32,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-20 23:15:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:15:33,574 INFO L225 Difference]: With dead ends: 894223 [2020-07-20 23:15:33,574 INFO L226 Difference]: Without dead ends: 658567 [2020-07-20 23:15:33,850 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 [2020-07-20 23:15:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658567 states. [2020-07-20 23:16:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658567 to 425258. [2020-07-20 23:16:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425258 states. [2020-07-20 23:16:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425258 states to 425258 states and 677209 transitions. [2020-07-20 23:16:10,647 INFO L78 Accepts]: Start accepts. Automaton has 425258 states and 677209 transitions. Word has length 502 [2020-07-20 23:16:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:16:10,647 INFO L479 AbstractCegarLoop]: Abstraction has 425258 states and 677209 transitions. [2020-07-20 23:16:10,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:16:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 425258 states and 677209 transitions. [2020-07-20 23:16:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 23:16:10,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:16:10,960 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] [2020-07-20 23:16:11,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:16:11,166 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:16:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:16:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash -462090818, now seen corresponding path program 1 times [2020-07-20 23:16:11,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:16:11,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967502529] [2020-07-20 23:16:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:16:11,645 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:16:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:16:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:16:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:16:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:16:11,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:16:11,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967502529] [2020-07-20 23:16:11,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:16:11,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:16:11,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913270354] [2020-07-20 23:16:11,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:16:11,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:16:11,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:16:11,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:16:11,779 INFO L87 Difference]: Start difference. First operand 425258 states and 677209 transitions. Second operand 3 states. [2020-07-20 23:16:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:16:58,421 INFO L93 Difference]: Finished difference Result 1024111 states and 1634273 transitions. [2020-07-20 23:16:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:16:58,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-20 23:16:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:16:59,489 INFO L225 Difference]: With dead ends: 1024111 [2020-07-20 23:16:59,489 INFO L226 Difference]: Without dead ends: 668364 [2020-07-20 23:16:59,807 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 [2020-07-20 23:17:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668364 states. [2020-07-20 23:17:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668364 to 568170. [2020-07-20 23:17:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568170 states. [2020-07-20 23:17:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568170 states to 568170 states and 911705 transitions. [2020-07-20 23:17:44,895 INFO L78 Accepts]: Start accepts. Automaton has 568170 states and 911705 transitions. Word has length 502 [2020-07-20 23:17:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:17:44,896 INFO L479 AbstractCegarLoop]: Abstraction has 568170 states and 911705 transitions. [2020-07-20 23:17:44,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:17:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 568170 states and 911705 transitions. [2020-07-20 23:17:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 23:17:45,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:17:45,217 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] [2020-07-20 23:17:45,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:17:45,418 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:17:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:17:45,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1834553960, now seen corresponding path program 1 times [2020-07-20 23:17:45,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:17:45,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450073992] [2020-07-20 23:17:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:17:45,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:17:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:17:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:17:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:17:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:17:45,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:17:45,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450073992] [2020-07-20 23:17:45,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:17:45,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:17:45,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886166302] [2020-07-20 23:17:45,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:17:45,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:17:45,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:17:45,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:17:45,953 INFO L87 Difference]: Start difference. First operand 568170 states and 911705 transitions. Second operand 4 states. [2020-07-20 23:18:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:18:41,991 INFO L93 Difference]: Finished difference Result 1200065 states and 1928070 transitions. [2020-07-20 23:18:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:18:41,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 23:18:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:18:42,899 INFO L225 Difference]: With dead ends: 1200065 [2020-07-20 23:18:42,899 INFO L226 Difference]: Without dead ends: 606062 [2020-07-20 23:18:43,301 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 [2020-07-20 23:18:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606062 states. [2020-07-20 23:19:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606062 to 605999. [2020-07-20 23:19:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605999 states. [2020-07-20 23:19:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605999 states to 605999 states and 970690 transitions. [2020-07-20 23:19:35,272 INFO L78 Accepts]: Start accepts. Automaton has 605999 states and 970690 transitions. Word has length 502 [2020-07-20 23:19:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:19:35,273 INFO L479 AbstractCegarLoop]: Abstraction has 605999 states and 970690 transitions. [2020-07-20 23:19:35,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:19:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 605999 states and 970690 transitions. [2020-07-20 23:19:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-20 23:19:35,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:19:35,584 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] [2020-07-20 23:19:35,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:19:35,785 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:19:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:19:35,786 INFO L82 PathProgramCache]: Analyzing trace with hash -781946058, now seen corresponding path program 1 times [2020-07-20 23:19:35,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:19:35,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801927593] [2020-07-20 23:19:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:19:36,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:19:36,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:19:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 23:19:36,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:19:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:19:36,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:19:36,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801927593] [2020-07-20 23:19:36,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:19:36,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:19:36,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163394674] [2020-07-20 23:19:36,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:19:36,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:19:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:19:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:19:36,389 INFO L87 Difference]: Start difference. First operand 605999 states and 970690 transitions. Second operand 4 states. [2020-07-20 23:20:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:20:30,400 INFO L93 Difference]: Finished difference Result 1278946 states and 2051943 transitions. [2020-07-20 23:20:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:20:30,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-07-20 23:20:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:20:31,364 INFO L225 Difference]: With dead ends: 1278946 [2020-07-20 23:20:31,364 INFO L226 Difference]: Without dead ends: 656991 [2020-07-20 23:20:31,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:20:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656991 states.