/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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:59:40,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:59:40,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:59:40,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:59:40,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:59:40,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:59:40,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:59:40,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:59:40,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:59:40,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:59:40,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:59:40,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:59:40,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:59:40,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:59:40,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:59:40,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:59:40,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:59:40,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:59:40,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:59:40,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:59:40,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:59:40,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:59:40,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:59:40,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:59:40,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:59:40,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:59:40,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:59:40,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:59:40,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:59:40,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 22:59:40,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 22:59:40,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 22:59:40,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 22:59:40,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 22:59:40,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 22:59:40,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 22:59:40,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 22:59:40,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 22:59:40,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:59:40,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:59:40,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:59:40,492 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 22:59:40,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:59:40,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:59:40,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:59:40,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:59:40,517 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:59:40,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:59:40,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:59:40,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:59:40,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:59:40,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:59:40,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:59:40,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:59:40,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:59:40,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:59:40,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:59:40,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:59:40,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:59:40,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:59:40,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:59:40,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:59:40,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:59:40,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:59:40,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:59:40,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:59:40,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:59:40,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:59:40,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:40,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:59:40,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:59:40,523 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 22:59:40,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:59:40,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:59:40,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:59:40,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:59:40,812 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:59:40,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 22:59:40,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04734b061/6a926e636f8041a8be6750d5d87ab1c4/FLAGb3c4a2667 [2020-07-20 22:59:41,607 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:59:41,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 22:59:41,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04734b061/6a926e636f8041a8be6750d5d87ab1c4/FLAGb3c4a2667 [2020-07-20 22:59:41,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04734b061/6a926e636f8041a8be6750d5d87ab1c4 [2020-07-20 22:59:41,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:59:41,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:59:41,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:59:41,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:59:41,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:59:41,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:59:41" (1/1) ... [2020-07-20 22:59:41,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bc1a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:41, skipping insertion in model container [2020-07-20 22:59:41,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:59:41" (1/1) ... [2020-07-20 22:59:41,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:59:41,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:59:43,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:59:43,518 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:59:44,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:59:44,524 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:59:44,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44 WrapperNode [2020-07-20 22:59:44,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:59:44,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:59:44,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:59:44,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:59:44,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:59:44,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:59:44,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:59:44,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:59:44,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (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 22:59:44,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:59:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:59:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:59:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:59:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:59:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 22:59:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 22:59:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 22:59:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:59:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:59:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 22:59:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 22:59:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 22:59:44,841 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 22:59:44,841 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 22:59:44,842 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 22:59:44,842 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 22:59:44,842 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 22:59:44,842 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 22:59:44,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:59:44,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:59:44,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:59:48,700 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:59:48,700 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 22:59:48,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:59:48 BoogieIcfgContainer [2020-07-20 22:59:48,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:59:48,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:59:48,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:59:48,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:59:48,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:59:41" (1/3) ... [2020-07-20 22:59:48,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c2e7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:59:48, skipping insertion in model container [2020-07-20 22:59:48,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (2/3) ... [2020-07-20 22:59:48,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c2e7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:59:48, skipping insertion in model container [2020-07-20 22:59:48,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:59:48" (3/3) ... [2020-07-20 22:59:48,720 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 22:59:48,731 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:59:48,740 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:59:48,755 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:59:48,783 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:59:48,783 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:59:48,783 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:59:48,783 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:59:48,784 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:59:48,784 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:59:48,784 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:59:48,784 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:59:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-20 22:59:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 22:59:48,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:48,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:48,867 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-20 22:59:48,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:48,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492691985] [2020-07-20 22:59:48,884 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 22:59:49,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:59:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:59:49,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:49,870 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 22:59:49,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:49,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492691985] [2020-07-20 22:59:49,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:49,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:49,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543291233] [2020-07-20 22:59:49,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:49,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:49,899 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 3 states. [2020-07-20 22:59:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:50,278 INFO L93 Difference]: Finished difference Result 1763 states and 3140 transitions. [2020-07-20 22:59:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:50,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-20 22:59:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:50,313 INFO L225 Difference]: With dead ends: 1763 [2020-07-20 22:59:50,313 INFO L226 Difference]: Without dead ends: 1559 [2020-07-20 22:59:50,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2020-07-20 22:59:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1557. [2020-07-20 22:59:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1557 states. [2020-07-20 22:59:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2577 transitions. [2020-07-20 22:59:50,463 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2577 transitions. Word has length 467 [2020-07-20 22:59:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:50,465 INFO L479 AbstractCegarLoop]: Abstraction has 1557 states and 2577 transitions. [2020-07-20 22:59:50,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2577 transitions. [2020-07-20 22:59:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 22:59:50,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:50,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:50,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:50,694 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-07-20 22:59:50,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:50,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859214218] [2020-07-20 22:59:50,696 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 22:59:51,174 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:59:51,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:59:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:51,543 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 22:59:51,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:51,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859214218] [2020-07-20 22:59:51,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:51,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:59:51,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7556871] [2020-07-20 22:59:51,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:59:51,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:59:51,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:59:51,548 INFO L87 Difference]: Start difference. First operand 1557 states and 2577 transitions. Second operand 4 states. [2020-07-20 22:59:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:51,868 INFO L93 Difference]: Finished difference Result 4612 states and 7636 transitions. [2020-07-20 22:59:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:59:51,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-20 22:59:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:51,886 INFO L225 Difference]: With dead ends: 4612 [2020-07-20 22:59:51,887 INFO L226 Difference]: Without dead ends: 3072 [2020-07-20 22:59:51,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:59:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2020-07-20 22:59:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3070. [2020-07-20 22:59:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3070 states. [2020-07-20 22:59:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 5062 transitions. [2020-07-20 22:59:52,036 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 5062 transitions. Word has length 467 [2020-07-20 22:59:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:52,037 INFO L479 AbstractCegarLoop]: Abstraction has 3070 states and 5062 transitions. [2020-07-20 22:59:52,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:59:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 5062 transitions. [2020-07-20 22:59:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 22:59:52,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:52,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:52,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:52,258 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-07-20 22:59:52,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:52,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539807836] [2020-07-20 22:59:52,261 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 22:59:52,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:59:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:52,964 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 22:59:52,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:52,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539807836] [2020-07-20 22:59:52,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:52,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:52,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051389504] [2020-07-20 22:59:52,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:52,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:52,968 INFO L87 Difference]: Start difference. First operand 3070 states and 5062 transitions. Second operand 3 states. [2020-07-20 22:59:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:53,358 INFO L93 Difference]: Finished difference Result 8928 states and 14687 transitions. [2020-07-20 22:59:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:53,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-20 22:59:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:53,392 INFO L225 Difference]: With dead ends: 8928 [2020-07-20 22:59:53,393 INFO L226 Difference]: Without dead ends: 6072 [2020-07-20 22:59:53,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2020-07-20 22:59:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 6070. [2020-07-20 22:59:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6070 states. [2020-07-20 22:59:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 9977 transitions. [2020-07-20 22:59:53,777 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 9977 transitions. Word has length 469 [2020-07-20 22:59:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:53,778 INFO L479 AbstractCegarLoop]: Abstraction has 6070 states and 9977 transitions. [2020-07-20 22:59:53,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 9977 transitions. [2020-07-20 22:59:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 22:59:53,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:53,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:54,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:54,007 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:54,008 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-07-20 22:59:54,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:54,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652348709] [2020-07-20 22:59:54,009 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 22:59:54,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:59:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:54,589 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 22:59:54,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:54,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652348709] [2020-07-20 22:59:54,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:54,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:54,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243889114] [2020-07-20 22:59:54,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:54,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:54,592 INFO L87 Difference]: Start difference. First operand 6070 states and 9977 transitions. Second operand 3 states. [2020-07-20 22:59:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:55,039 INFO L93 Difference]: Finished difference Result 18113 states and 29763 transitions. [2020-07-20 22:59:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:55,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-20 22:59:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:55,119 INFO L225 Difference]: With dead ends: 18113 [2020-07-20 22:59:55,120 INFO L226 Difference]: Without dead ends: 12095 [2020-07-20 22:59:55,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12095 states. [2020-07-20 22:59:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12095 to 6117. [2020-07-20 22:59:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6117 states. [2020-07-20 22:59:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 10051 transitions. [2020-07-20 22:59:55,583 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 10051 transitions. Word has length 470 [2020-07-20 22:59:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:55,583 INFO L479 AbstractCegarLoop]: Abstraction has 6117 states and 10051 transitions. [2020-07-20 22:59:55,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 10051 transitions. [2020-07-20 22:59:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 22:59:55,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:55,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:55,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:55,812 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-07-20 22:59:55,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:55,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50355306] [2020-07-20 22:59:55,814 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 22:59:56,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:59:56,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:56,565 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 22:59:56,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:56,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50355306] [2020-07-20 22:59:56,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:56,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:56,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105652295] [2020-07-20 22:59:56,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:56,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:56,568 INFO L87 Difference]: Start difference. First operand 6117 states and 10051 transitions. Second operand 3 states. [2020-07-20 22:59:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:57,057 INFO L93 Difference]: Finished difference Result 17668 states and 28944 transitions. [2020-07-20 22:59:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:57,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-20 22:59:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:57,090 INFO L225 Difference]: With dead ends: 17668 [2020-07-20 22:59:57,090 INFO L226 Difference]: Without dead ends: 11950 [2020-07-20 22:59:57,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 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 22:59:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2020-07-20 22:59:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 11948. [2020-07-20 22:59:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11948 states. [2020-07-20 22:59:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11948 states to 11948 states and 19537 transitions. [2020-07-20 22:59:57,593 INFO L78 Accepts]: Start accepts. Automaton has 11948 states and 19537 transitions. Word has length 471 [2020-07-20 22:59:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:57,594 INFO L479 AbstractCegarLoop]: Abstraction has 11948 states and 19537 transitions. [2020-07-20 22:59:57,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 11948 states and 19537 transitions. [2020-07-20 22:59:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 22:59:57,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:57,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:57,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:57,833 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-07-20 22:59:57,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:57,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132656841] [2020-07-20 22:59:57,834 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 22:59:58,752 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:59:58,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:58,900 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 22:59:58,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:58,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132656841] [2020-07-20 22:59:58,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:58,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:58,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102556465] [2020-07-20 22:59:58,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:58,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:58,912 INFO L87 Difference]: Start difference. First operand 11948 states and 19537 transitions. Second operand 3 states. [2020-07-20 22:59:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:59,501 INFO L93 Difference]: Finished difference Result 35574 states and 58135 transitions. [2020-07-20 22:59:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:59,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-20 22:59:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:59,561 INFO L225 Difference]: With dead ends: 35574 [2020-07-20 22:59:59,561 INFO L226 Difference]: Without dead ends: 23765 [2020-07-20 22:59:59,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 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 22:59:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23765 states. [2020-07-20 23:00:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23765 to 12027. [2020-07-20 23:00:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12027 states. [2020-07-20 23:00:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 19642 transitions. [2020-07-20 23:00:00,251 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 19642 transitions. Word has length 471 [2020-07-20 23:00:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:00,252 INFO L479 AbstractCegarLoop]: Abstraction has 12027 states and 19642 transitions. [2020-07-20 23:00:00,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 19642 transitions. [2020-07-20 23:00:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 23:00:00,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:00,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:00,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:00,493 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash -893572627, now seen corresponding path program 1 times [2020-07-20 23:00:00,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:00,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221517798] [2020-07-20 23:00:00,494 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 23:00:00,906 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:00,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:00,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:01,029 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 23:00:01,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:01,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221517798] [2020-07-20 23:00:01,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:01,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:01,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073129549] [2020-07-20 23:00:01,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:01,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:01,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:01,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:01,031 INFO L87 Difference]: Start difference. First operand 12027 states and 19642 transitions. Second operand 3 states. [2020-07-20 23:00:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:01,658 INFO L93 Difference]: Finished difference Result 35734 states and 58356 transitions. [2020-07-20 23:00:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:01,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-20 23:00:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:01,717 INFO L225 Difference]: With dead ends: 35734 [2020-07-20 23:00:01,717 INFO L226 Difference]: Without dead ends: 23901 [2020-07-20 23:00:01,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23901 states. [2020-07-20 23:00:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23901 to 12163. [2020-07-20 23:00:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12163 states. [2020-07-20 23:00:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 19834 transitions. [2020-07-20 23:00:02,274 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 19834 transitions. Word has length 472 [2020-07-20 23:00:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:02,275 INFO L479 AbstractCegarLoop]: Abstraction has 12163 states and 19834 transitions. [2020-07-20 23:00:02,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 19834 transitions. [2020-07-20 23:00:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 23:00:02,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:02,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:02,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:02,509 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-07-20 23:00:02,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:02,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793264689] [2020-07-20 23:00:02,511 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 23:00:02,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:02,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:02,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 23:00:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:03,252 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 23:00:03,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:03,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793264689] [2020-07-20 23:00:03,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:03,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:00:03,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874884701] [2020-07-20 23:00:03,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:00:03,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:00:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:00:03,255 INFO L87 Difference]: Start difference. First operand 12163 states and 19834 transitions. Second operand 4 states. [2020-07-20 23:00:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:04,120 INFO L93 Difference]: Finished difference Result 28063 states and 46055 transitions. [2020-07-20 23:00:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:00:04,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 23:00:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:04,144 INFO L225 Difference]: With dead ends: 28063 [2020-07-20 23:00:04,144 INFO L226 Difference]: Without dead ends: 14495 [2020-07-20 23:00:04,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:00:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14495 states. [2020-07-20 23:00:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14495 to 14493. [2020-07-20 23:00:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14493 states. [2020-07-20 23:00:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14493 states to 14493 states and 23706 transitions. [2020-07-20 23:00:04,913 INFO L78 Accepts]: Start accepts. Automaton has 14493 states and 23706 transitions. Word has length 473 [2020-07-20 23:00:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:04,914 INFO L479 AbstractCegarLoop]: Abstraction has 14493 states and 23706 transitions. [2020-07-20 23:00:04,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:00:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 14493 states and 23706 transitions. [2020-07-20 23:00:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 23:00:04,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:04,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:05,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:05,156 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2012901937, now seen corresponding path program 1 times [2020-07-20 23:00:05,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:05,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567778443] [2020-07-20 23:00:05,157 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 23:00:05,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:05,958 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 23:00:05,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:05,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567778443] [2020-07-20 23:00:05,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:05,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:05,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803574544] [2020-07-20 23:00:05,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:05,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:05,963 INFO L87 Difference]: Start difference. First operand 14493 states and 23706 transitions. Second operand 3 states. [2020-07-20 23:00:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:07,326 INFO L93 Difference]: Finished difference Result 42136 states and 68973 transitions. [2020-07-20 23:00:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:07,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-20 23:00:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:07,365 INFO L225 Difference]: With dead ends: 42136 [2020-07-20 23:00:07,365 INFO L226 Difference]: Without dead ends: 28398 [2020-07-20 23:00:07,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28398 states. [2020-07-20 23:00:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28398 to 28396. [2020-07-20 23:00:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28396 states. [2020-07-20 23:00:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28396 states to 28396 states and 46290 transitions. [2020-07-20 23:00:08,191 INFO L78 Accepts]: Start accepts. Automaton has 28396 states and 46290 transitions. Word has length 475 [2020-07-20 23:00:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:08,192 INFO L479 AbstractCegarLoop]: Abstraction has 28396 states and 46290 transitions. [2020-07-20 23:00:08,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28396 states and 46290 transitions. [2020-07-20 23:00:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 23:00:08,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:08,228 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] [2020-07-20 23:00:08,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:08,442 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1870109848, now seen corresponding path program 1 times [2020-07-20 23:00:08,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:08,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801743156] [2020-07-20 23:00:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:00:09,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:00:09,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:09,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:09,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:09,550 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 23:00:09,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:09,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801743156] [2020-07-20 23:00:09,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:09,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:09,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907611393] [2020-07-20 23:00:09,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:09,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:09,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:09,552 INFO L87 Difference]: Start difference. First operand 28396 states and 46290 transitions. Second operand 3 states. [2020-07-20 23:00:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:10,993 INFO L93 Difference]: Finished difference Result 81600 states and 132828 transitions. [2020-07-20 23:00:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:10,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-20 23:00:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:11,044 INFO L225 Difference]: With dead ends: 81600 [2020-07-20 23:00:11,044 INFO L226 Difference]: Without dead ends: 55010 [2020-07-20 23:00:11,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 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 23:00:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55010 states. [2020-07-20 23:00:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55010 to 28648. [2020-07-20 23:00:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28648 states. [2020-07-20 23:00:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28648 states to 28648 states and 46654 transitions. [2020-07-20 23:00:12,061 INFO L78 Accepts]: Start accepts. Automaton has 28648 states and 46654 transitions. Word has length 476 [2020-07-20 23:00:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:12,062 INFO L479 AbstractCegarLoop]: Abstraction has 28648 states and 46654 transitions. [2020-07-20 23:00:12,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28648 states and 46654 transitions. [2020-07-20 23:00:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 23:00:12,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:12,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:12,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:12,288 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash 194150838, now seen corresponding path program 1 times [2020-07-20 23:00:12,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:12,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983458688] [2020-07-20 23:00:12,290 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 23:00:12,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:00:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:13,021 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 23:00:13,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:13,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983458688] [2020-07-20 23:00:13,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:13,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:00:13,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946541392] [2020-07-20 23:00:13,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:00:13,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:00:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:00:13,023 INFO L87 Difference]: Start difference. First operand 28648 states and 46654 transitions. Second operand 4 states. [2020-07-20 23:00:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:14,958 INFO L93 Difference]: Finished difference Result 83282 states and 135681 transitions. [2020-07-20 23:00:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:00:14,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 23:00:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:15,011 INFO L225 Difference]: With dead ends: 83282 [2020-07-20 23:00:15,011 INFO L226 Difference]: Without dead ends: 55724 [2020-07-20 23:00:15,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:00:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55724 states. [2020-07-20 23:00:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55724 to 55722. [2020-07-20 23:00:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55722 states. [2020-07-20 23:00:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55722 states to 55722 states and 90326 transitions. [2020-07-20 23:00:18,190 INFO L78 Accepts]: Start accepts. Automaton has 55722 states and 90326 transitions. Word has length 477 [2020-07-20 23:00:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:18,190 INFO L479 AbstractCegarLoop]: Abstraction has 55722 states and 90326 transitions. [2020-07-20 23:00:18,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:00:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 55722 states and 90326 transitions. [2020-07-20 23:00:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 23:00:18,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:18,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:18,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:18,458 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1755836514, now seen corresponding path program 1 times [2020-07-20 23:00:18,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:18,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092641096] [2020-07-20 23:00:18,460 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 23:00:18,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:18,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:19,083 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 23:00:19,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:19,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092641096] [2020-07-20 23:00:19,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:19,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:19,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231024558] [2020-07-20 23:00:19,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:19,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:19,086 INFO L87 Difference]: Start difference. First operand 55722 states and 90326 transitions. Second operand 3 states. [2020-07-20 23:00:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:22,729 INFO L93 Difference]: Finished difference Result 160130 states and 259428 transitions. [2020-07-20 23:00:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:22,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-20 23:00:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:22,837 INFO L225 Difference]: With dead ends: 160130 [2020-07-20 23:00:22,837 INFO L226 Difference]: Without dead ends: 107896 [2020-07-20 23:00:22,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107896 states. [2020-07-20 23:00:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107896 to 107894. [2020-07-20 23:00:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107894 states. [2020-07-20 23:00:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107894 states to 107894 states and 174122 transitions. [2020-07-20 23:00:28,439 INFO L78 Accepts]: Start accepts. Automaton has 107894 states and 174122 transitions. Word has length 479 [2020-07-20 23:00:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:28,440 INFO L479 AbstractCegarLoop]: Abstraction has 107894 states and 174122 transitions. [2020-07-20 23:00:28,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 107894 states and 174122 transitions. [2020-07-20 23:00:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 23:00:28,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:28,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:28,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:28,713 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1946224242, now seen corresponding path program 1 times [2020-07-20 23:00:28,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:28,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802194550] [2020-07-20 23:00:28,715 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 23:00:29,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:29,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:29,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:29,535 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 23:00:29,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:29,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802194550] [2020-07-20 23:00:29,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:29,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:29,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521012978] [2020-07-20 23:00:29,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:29,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:29,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:29,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:29,537 INFO L87 Difference]: Start difference. First operand 107894 states and 174122 transitions. Second operand 3 states. [2020-07-20 23:00:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:37,926 INFO L93 Difference]: Finished difference Result 320406 states and 517077 transitions. [2020-07-20 23:00:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:37,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-20 23:00:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:38,158 INFO L225 Difference]: With dead ends: 320406 [2020-07-20 23:00:38,159 INFO L226 Difference]: Without dead ends: 213782 [2020-07-20 23:00:38,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 23:00:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213782 states. [2020-07-20 23:00:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213782 to 108364. [2020-07-20 23:00:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108364 states. [2020-07-20 23:00:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108364 states to 108364 states and 174842 transitions. [2020-07-20 23:00:45,875 INFO L78 Accepts]: Start accepts. Automaton has 108364 states and 174842 transitions. Word has length 480 [2020-07-20 23:00:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:45,876 INFO L479 AbstractCegarLoop]: Abstraction has 108364 states and 174842 transitions. [2020-07-20 23:00:45,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 108364 states and 174842 transitions. [2020-07-20 23:00:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 23:00:45,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:45,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:46,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:46,154 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1097736007, now seen corresponding path program 1 times [2020-07-20 23:00:46,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:46,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738406556] [2020-07-20 23:00:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:00:46,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:46,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:46,780 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 23:00:46,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:46,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738406556] [2020-07-20 23:00:46,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:46,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:46,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205110663] [2020-07-20 23:00:46,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:46,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:46,782 INFO L87 Difference]: Start difference. First operand 108364 states and 174842 transitions. Second operand 3 states. [2020-07-20 23:00:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:54,740 INFO L93 Difference]: Finished difference Result 314991 states and 507697 transitions. [2020-07-20 23:00:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:54,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 23:00:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:54,976 INFO L225 Difference]: With dead ends: 314991 [2020-07-20 23:00:54,976 INFO L226 Difference]: Without dead ends: 212775 [2020-07-20 23:00:55,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212775 states. [2020-07-20 23:01:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212775 to 212773. [2020-07-20 23:01:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212773 states. [2020-07-20 23:01:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212773 states to 212773 states and 341865 transitions. [2020-07-20 23:01:08,535 INFO L78 Accepts]: Start accepts. Automaton has 212773 states and 341865 transitions. Word has length 481 [2020-07-20 23:01:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:01:08,536 INFO L479 AbstractCegarLoop]: Abstraction has 212773 states and 341865 transitions. [2020-07-20 23:01:08,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:01:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 212773 states and 341865 transitions. [2020-07-20 23:01:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 23:01:08,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:01:08,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:01:08,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:08,881 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:01:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:01:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash -856386462, now seen corresponding path program 1 times [2020-07-20 23:01:08,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:01:08,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744386572] [2020-07-20 23:01:08,883 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 23:01:09,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:01:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:01:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:01:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:01:09,361 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 23:01:09,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:01:09,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744386572] [2020-07-20 23:01:09,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:01:09,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:01:09,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147984805] [2020-07-20 23:01:09,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:01:09,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:01:09,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:01:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:01:09,363 INFO L87 Difference]: Start difference. First operand 212773 states and 341865 transitions. Second operand 3 states. [2020-07-20 23:01:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:01:30,662 INFO L93 Difference]: Finished difference Result 633555 states and 1017801 transitions. [2020-07-20 23:01:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:01:30,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 23:01:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:01:31,114 INFO L225 Difference]: With dead ends: 633555 [2020-07-20 23:01:31,114 INFO L226 Difference]: Without dead ends: 422517 [2020-07-20 23:01:31,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:01:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422517 states. [2020-07-20 23:01:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422517 to 213474. [2020-07-20 23:01:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213474 states. [2020-07-20 23:01:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213474 states to 213474 states and 342845 transitions. [2020-07-20 23:01:48,170 INFO L78 Accepts]: Start accepts. Automaton has 213474 states and 342845 transitions. Word has length 481 [2020-07-20 23:01:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:01:48,170 INFO L479 AbstractCegarLoop]: Abstraction has 213474 states and 342845 transitions. [2020-07-20 23:01:48,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:01:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 213474 states and 342845 transitions. [2020-07-20 23:01:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 23:01:48,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:01:48,317 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] [2020-07-20 23:01:48,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:48,518 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:01:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:01:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1968471478, now seen corresponding path program 1 times [2020-07-20 23:01:48,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:01:48,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846220907] [2020-07-20 23:01:48,520 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 23:01:48,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:01:48,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:01:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:01:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:01:49,072 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 23:01:49,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:01:49,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846220907] [2020-07-20 23:01:49,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:01:49,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:01:49,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862266533] [2020-07-20 23:01:49,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:01:49,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:01:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:01:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:01:49,075 INFO L87 Difference]: Start difference. First operand 213474 states and 342845 transitions. Second operand 4 states. [2020-07-20 23:02:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:02:12,113 INFO L93 Difference]: Finished difference Result 624196 states and 1001933 transitions. [2020-07-20 23:02:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:02:12,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-20 23:02:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:02:12,569 INFO L225 Difference]: With dead ends: 624196 [2020-07-20 23:02:12,569 INFO L226 Difference]: Without dead ends: 418652 [2020-07-20 23:02:12,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 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 23:02:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418652 states. [2020-07-20 23:02:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418652 to 418650. [2020-07-20 23:02:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418650 states. [2020-07-20 23:02:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418650 states to 418650 states and 668685 transitions. [2020-07-20 23:02:46,722 INFO L78 Accepts]: Start accepts. Automaton has 418650 states and 668685 transitions. Word has length 482 [2020-07-20 23:02:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:02:46,723 INFO L479 AbstractCegarLoop]: Abstraction has 418650 states and 668685 transitions. [2020-07-20 23:02:46,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:02:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 418650 states and 668685 transitions. [2020-07-20 23:02:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 23:02:47,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:47,004 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] [2020-07-20 23:02:47,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:47,211 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash 904562055, now seen corresponding path program 1 times [2020-07-20 23:02:47,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:47,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206035784] [2020-07-20 23:02:47,213 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 23:02:47,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:02:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:02:47,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:47,825 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 23:02:47,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:47,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206035784] [2020-07-20 23:02:47,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:47,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:02:47,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785119166] [2020-07-20 23:02:47,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:02:47,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:47,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:02:47,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:02:47,827 INFO L87 Difference]: Start difference. First operand 418650 states and 668685 transitions. Second operand 3 states. [2020-07-20 23:03:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:36,272 INFO L93 Difference]: Finished difference Result 1246937 states and 1991095 transitions. [2020-07-20 23:03:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:36,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-20 23:03:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:37,234 INFO L225 Difference]: With dead ends: 1246937 [2020-07-20 23:03:37,234 INFO L226 Difference]: Without dead ends: 830234 [2020-07-20 23:03:37,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 23:03:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830234 states. [2020-07-20 23:04:14,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830234 to 420920. [2020-07-20 23:04:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420920 states. [2020-07-20 23:04:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420920 states to 420920 states and 672038 transitions. [2020-07-20 23:04:15,933 INFO L78 Accepts]: Start accepts. Automaton has 420920 states and 672038 transitions. Word has length 482 [2020-07-20 23:04:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:15,934 INFO L479 AbstractCegarLoop]: Abstraction has 420920 states and 672038 transitions. [2020-07-20 23:04:15,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 420920 states and 672038 transitions. [2020-07-20 23:04:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 23:04:16,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:16,231 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] [2020-07-20 23:04:16,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:16,432 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -909970932, now seen corresponding path program 1 times [2020-07-20 23:04:16,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:16,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768695412] [2020-07-20 23:04:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:16,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:16,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:16,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:16,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:16,984 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 23:04:16,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:16,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768695412] [2020-07-20 23:04:16,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:16,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:16,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602413098] [2020-07-20 23:04:16,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:16,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:16,987 INFO L87 Difference]: Start difference. First operand 420920 states and 672038 transitions. Second operand 4 states. [2020-07-20 23:04:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:51,779 INFO L93 Difference]: Finished difference Result 933909 states and 1498532 transitions. [2020-07-20 23:04:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:51,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-20 23:04:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:52,389 INFO L225 Difference]: With dead ends: 933909 [2020-07-20 23:04:52,389 INFO L226 Difference]: Without dead ends: 514367 [2020-07-20 23:04:52,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 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 23:04:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514367 states. [2020-07-20 23:05:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514367 to 425374. [2020-07-20 23:05:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425374 states. [2020-07-20 23:05:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425374 states to 425374 states and 679213 transitions. [2020-07-20 23:05:36,223 INFO L78 Accepts]: Start accepts. Automaton has 425374 states and 679213 transitions. Word has length 483 [2020-07-20 23:05:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:36,224 INFO L479 AbstractCegarLoop]: Abstraction has 425374 states and 679213 transitions. [2020-07-20 23:05:36,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 425374 states and 679213 transitions. [2020-07-20 23:05:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 23:05:36,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:36,536 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 23:05:36,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:36,738 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:36,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2041955258, now seen corresponding path program 1 times [2020-07-20 23:05:36,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:36,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497009819] [2020-07-20 23:05:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:37,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:37,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:37,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:37,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497009819] [2020-07-20 23:05:37,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:37,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:37,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84996787] [2020-07-20 23:05:37,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:37,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:37,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:37,226 INFO L87 Difference]: Start difference. First operand 425374 states and 679213 transitions. Second operand 3 states. [2020-07-20 23:06:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:33,743 INFO L93 Difference]: Finished difference Result 1254854 states and 2003132 transitions. [2020-07-20 23:06:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:06:33,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-20 23:06:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:35,335 INFO L225 Difference]: With dead ends: 1254854 [2020-07-20 23:06:35,336 INFO L226 Difference]: Without dead ends: 834886 [2020-07-20 23:06:35,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834886 states. [2020-07-20 23:07:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834886 to 425120. [2020-07-20 23:07:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425120 states. [2020-07-20 23:07:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425120 states to 425120 states and 678794 transitions. [2020-07-20 23:07:18,706 INFO L78 Accepts]: Start accepts. Automaton has 425120 states and 678794 transitions. Word has length 484 [2020-07-20 23:07:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:07:18,707 INFO L479 AbstractCegarLoop]: Abstraction has 425120 states and 678794 transitions. [2020-07-20 23:07:18,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:07:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 425120 states and 678794 transitions. [2020-07-20 23:07:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 23:07:19,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:07:19,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:07:19,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:19,276 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:07:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:07:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2107384319, now seen corresponding path program 1 times [2020-07-20 23:07:19,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:07:19,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955418081] [2020-07-20 23:07:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:19,699 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:07:19,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:07:19,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:07:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:07:20,512 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 23:07:20,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:07:20,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955418081] [2020-07-20 23:07:20,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:07:20,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:07:20,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395010806] [2020-07-20 23:07:20,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:07:20,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:07:20,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:07:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:07:20,514 INFO L87 Difference]: Start difference. First operand 425120 states and 678794 transitions. Second operand 4 states. [2020-07-20 23:08:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:20,518 INFO L93 Difference]: Finished difference Result 1214941 states and 1934824 transitions. [2020-07-20 23:08:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:08:20,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 23:08:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:21,558 INFO L225 Difference]: With dead ends: 1214941 [2020-07-20 23:08:21,558 INFO L226 Difference]: Without dead ends: 833755 [2020-07-20 23:08:21,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 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 23:08:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833755 states. [2020-07-20 23:09:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833755 to 467057. [2020-07-20 23:09:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467057 states. [2020-07-20 23:09:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467057 states to 467057 states and 749662 transitions. [2020-07-20 23:09:10,399 INFO L78 Accepts]: Start accepts. Automaton has 467057 states and 749662 transitions. Word has length 485 [2020-07-20 23:09:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:10,399 INFO L479 AbstractCegarLoop]: Abstraction has 467057 states and 749662 transitions. [2020-07-20 23:09:10,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:09:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 467057 states and 749662 transitions. [2020-07-20 23:09:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 23:09:11,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:11,570 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 23:09:11,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:11,771 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1959139363, now seen corresponding path program 1 times [2020-07-20 23:09:11,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:11,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526883210] [2020-07-20 23:09:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:12,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:09:12,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:12,330 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 23:09:12,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:12,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526883210] [2020-07-20 23:09:12,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:12,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:12,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386170187] [2020-07-20 23:09:12,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:12,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:12,332 INFO L87 Difference]: Start difference. First operand 467057 states and 749662 transitions. Second operand 3 states. [2020-07-20 23:10:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:15,295 INFO L93 Difference]: Finished difference Result 1238383 states and 1976581 transitions. [2020-07-20 23:10:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:10:15,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 23:10:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:16,917 INFO L225 Difference]: With dead ends: 1238383 [2020-07-20 23:10:16,917 INFO L226 Difference]: Without dead ends: 830698 [2020-07-20 23:10:17,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830698 states.