/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:27:39,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:27:39,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:27:39,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:27:39,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:27:39,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:27:39,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:27:39,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:27:39,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:27:39,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:27:39,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:27:39,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:27:39,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:27:39,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:27:39,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:27:39,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:27:39,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:27:39,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:27:39,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:27:39,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:27:39,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:27:39,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:27:39,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:27:39,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:27:39,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:27:39,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:27:39,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:27:39,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:27:39,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:27:39,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:27:39,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:27:39,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:27:39,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:27:39,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:27:39,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:27:39,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:27:39,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:27:39,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:27:39,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:27:39,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:27:39,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:27:39,513 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:27:39,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:27:39,514 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:27:39,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:27:39,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:27:39,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:27:39,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:27:39,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:27:39,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:27:39,516 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:27:39,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:27:39,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:27:39,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:27:39,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:27:39,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:27:39,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:27:39,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:27:39,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:27:39,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:27:39,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:27:39,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:27:39,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:27:39,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:39,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:27:39,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:27:39,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:27:39,819 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:27:39,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:27:39,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:27:39,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:27:39,847 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:27:39,848 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 02:27:39,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db98ddf0c/5bf03e21d857477faf6335b0e189cdbb/FLAGe0f4e2826 [2020-07-21 02:27:40,601 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:27:40,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 02:27:40,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db98ddf0c/5bf03e21d857477faf6335b0e189cdbb/FLAGe0f4e2826 [2020-07-21 02:27:40,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db98ddf0c/5bf03e21d857477faf6335b0e189cdbb [2020-07-21 02:27:40,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:27:40,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:27:40,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:27:40,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:27:40,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:27:40,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:27:40" (1/1) ... [2020-07-21 02:27:40,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ebb4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:40, skipping insertion in model container [2020-07-21 02:27:40,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:27:40" (1/1) ... [2020-07-21 02:27:40,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:27:40,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:27:42,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:27:42,531 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:27:43,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:27:43,509 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:27:43,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43 WrapperNode [2020-07-21 02:27:43,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:27:43,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:27:43,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:27:43,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:27:43,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... [2020-07-21 02:27:43,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:27:43,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:27:43,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:27:43,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:27:43,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:27:43,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:27:43,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:27:43,784 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:27:43,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:27:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:27:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:27:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:27:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:27:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:27:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:27:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:27:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:27:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:27:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:27:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:27:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:27:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:27:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:27:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:27:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:27:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:27:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:27:47,951 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:27:47,952 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:27:47,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:27:47 BoogieIcfgContainer [2020-07-21 02:27:47,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:27:47,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:27:47,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:27:47,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:27:47,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:27:40" (1/3) ... [2020-07-21 02:27:47,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab8898a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:27:47, skipping insertion in model container [2020-07-21 02:27:47,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:27:43" (2/3) ... [2020-07-21 02:27:47,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab8898a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:27:47, skipping insertion in model container [2020-07-21 02:27:47,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:27:47" (3/3) ... [2020-07-21 02:27:47,977 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 02:27:47,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:27:47,998 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:27:48,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:27:48,045 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:27:48,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:27:48,045 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:27:48,045 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:27:48,045 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:27:48,046 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:27:48,046 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:27:48,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:27:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-21 02:27:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:27:48,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:48,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:48,137 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-21 02:27:48,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:48,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25856447] [2020-07-21 02:27:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:48,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:48,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:27:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:49,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:49,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25856447] [2020-07-21 02:27:49,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:49,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:49,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394424333] [2020-07-21 02:27:49,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:49,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:49,257 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 4 states. [2020-07-21 02:27:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:49,828 INFO L93 Difference]: Finished difference Result 4174 states and 7515 transitions. [2020-07-21 02:27:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:27:49,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 02:27:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:49,882 INFO L225 Difference]: With dead ends: 4174 [2020-07-21 02:27:49,882 INFO L226 Difference]: Without dead ends: 2808 [2020-07-21 02:27:49,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2020-07-21 02:27:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2806. [2020-07-21 02:27:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2020-07-21 02:27:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4627 transitions. [2020-07-21 02:27:50,136 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4627 transitions. Word has length 487 [2020-07-21 02:27:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:50,138 INFO L479 AbstractCegarLoop]: Abstraction has 2806 states and 4627 transitions. [2020-07-21 02:27:50,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:27:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4627 transitions. [2020-07-21 02:27:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 02:27:50,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:50,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:50,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:50,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash -541571176, now seen corresponding path program 1 times [2020-07-21 02:27:50,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:50,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341372409] [2020-07-21 02:27:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:50,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:50,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:51,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:51,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341372409] [2020-07-21 02:27:51,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:51,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:51,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505333137] [2020-07-21 02:27:51,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:51,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:51,078 INFO L87 Difference]: Start difference. First operand 2806 states and 4627 transitions. Second operand 3 states. [2020-07-21 02:27:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:51,405 INFO L93 Difference]: Finished difference Result 8011 states and 13147 transitions. [2020-07-21 02:27:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:51,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 02:27:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:51,434 INFO L225 Difference]: With dead ends: 8011 [2020-07-21 02:27:51,434 INFO L226 Difference]: Without dead ends: 5409 [2020-07-21 02:27:51,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2020-07-21 02:27:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5407. [2020-07-21 02:27:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5407 states. [2020-07-21 02:27:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 8859 transitions. [2020-07-21 02:27:51,660 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 8859 transitions. Word has length 489 [2020-07-21 02:27:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:51,661 INFO L479 AbstractCegarLoop]: Abstraction has 5407 states and 8859 transitions. [2020-07-21 02:27:51,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 8859 transitions. [2020-07-21 02:27:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 02:27:51,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:51,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:51,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:51,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1040804292, now seen corresponding path program 1 times [2020-07-21 02:27:51,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:51,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019715354] [2020-07-21 02:27:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:52,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:52,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:52,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019715354] [2020-07-21 02:27:52,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:52,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:52,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549371647] [2020-07-21 02:27:52,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:52,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:52,474 INFO L87 Difference]: Start difference. First operand 5407 states and 8859 transitions. Second operand 3 states. [2020-07-21 02:27:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:52,841 INFO L93 Difference]: Finished difference Result 15865 states and 25927 transitions. [2020-07-21 02:27:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:52,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 02:27:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:52,891 INFO L225 Difference]: With dead ends: 15865 [2020-07-21 02:27:52,891 INFO L226 Difference]: Without dead ends: 10612 [2020-07-21 02:27:52,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10612 states. [2020-07-21 02:27:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10612 to 5435. [2020-07-21 02:27:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5435 states. [2020-07-21 02:27:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 8899 transitions. [2020-07-21 02:27:53,150 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 8899 transitions. Word has length 490 [2020-07-21 02:27:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:53,151 INFO L479 AbstractCegarLoop]: Abstraction has 5435 states and 8899 transitions. [2020-07-21 02:27:53,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 8899 transitions. [2020-07-21 02:27:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 02:27:53,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:53,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:53,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:53,384 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash -147211395, now seen corresponding path program 1 times [2020-07-21 02:27:53,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:53,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015567187] [2020-07-21 02:27:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:53,755 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:53,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:27:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:54,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:54,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015567187] [2020-07-21 02:27:54,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:54,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:54,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089376996] [2020-07-21 02:27:54,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:54,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:54,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:54,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:54,002 INFO L87 Difference]: Start difference. First operand 5435 states and 8899 transitions. Second operand 4 states. [2020-07-21 02:27:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:54,359 INFO L93 Difference]: Finished difference Result 11932 states and 19648 transitions. [2020-07-21 02:27:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:27:54,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 02:27:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:54,393 INFO L225 Difference]: With dead ends: 11932 [2020-07-21 02:27:54,393 INFO L226 Difference]: Without dead ends: 6526 [2020-07-21 02:27:54,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2020-07-21 02:27:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 5592. [2020-07-21 02:27:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2020-07-21 02:27:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 9176 transitions. [2020-07-21 02:27:54,627 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 9176 transitions. Word has length 491 [2020-07-21 02:27:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:54,627 INFO L479 AbstractCegarLoop]: Abstraction has 5592 states and 9176 transitions. [2020-07-21 02:27:54,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:27:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 9176 transitions. [2020-07-21 02:27:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 02:27:54,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:54,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:54,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:54,863 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1430418946, now seen corresponding path program 1 times [2020-07-21 02:27:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33655288] [2020-07-21 02:27:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:55,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:55,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:55,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33655288] [2020-07-21 02:27:55,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:55,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:55,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707113805] [2020-07-21 02:27:55,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:55,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:55,460 INFO L87 Difference]: Start difference. First operand 5592 states and 9176 transitions. Second operand 3 states. [2020-07-21 02:27:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:55,780 INFO L93 Difference]: Finished difference Result 16679 states and 27360 transitions. [2020-07-21 02:27:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:55,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 02:27:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:55,807 INFO L225 Difference]: With dead ends: 16679 [2020-07-21 02:27:55,808 INFO L226 Difference]: Without dead ends: 11139 [2020-07-21 02:27:55,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11139 states. [2020-07-21 02:27:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11139 to 5639. [2020-07-21 02:27:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5639 states. [2020-07-21 02:27:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5639 states to 5639 states and 9250 transitions. [2020-07-21 02:27:56,183 INFO L78 Accepts]: Start accepts. Automaton has 5639 states and 9250 transitions. Word has length 494 [2020-07-21 02:27:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:56,183 INFO L479 AbstractCegarLoop]: Abstraction has 5639 states and 9250 transitions. [2020-07-21 02:27:56,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5639 states and 9250 transitions. [2020-07-21 02:27:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:27:56,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:56,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:56,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:56,412 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1759779998, now seen corresponding path program 1 times [2020-07-21 02:27:56,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:56,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320654625] [2020-07-21 02:27:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:56,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:57,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:57,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320654625] [2020-07-21 02:27:57,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:57,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:57,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081165239] [2020-07-21 02:27:57,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:57,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:57,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:57,084 INFO L87 Difference]: Start difference. First operand 5639 states and 9250 transitions. Second operand 3 states. [2020-07-21 02:27:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:57,610 INFO L93 Difference]: Finished difference Result 16309 states and 26698 transitions. [2020-07-21 02:27:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:57,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:27:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:57,638 INFO L225 Difference]: With dead ends: 16309 [2020-07-21 02:27:57,638 INFO L226 Difference]: Without dead ends: 11024 [2020-07-21 02:27:57,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2020-07-21 02:27:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 11022. [2020-07-21 02:27:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11022 states. [2020-07-21 02:27:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11022 states to 11022 states and 18001 transitions. [2020-07-21 02:27:58,022 INFO L78 Accepts]: Start accepts. Automaton has 11022 states and 18001 transitions. Word has length 495 [2020-07-21 02:27:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:58,023 INFO L479 AbstractCegarLoop]: Abstraction has 11022 states and 18001 transitions. [2020-07-21 02:27:58,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 11022 states and 18001 transitions. [2020-07-21 02:27:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:27:58,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:58,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:58,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:58,271 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:58,272 INFO L82 PathProgramCache]: Analyzing trace with hash -702313640, now seen corresponding path program 1 times [2020-07-21 02:27:58,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:58,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080824704] [2020-07-21 02:27:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:58,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:58,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:58,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:58,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080824704] [2020-07-21 02:27:58,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:58,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:58,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707882537] [2020-07-21 02:27:58,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:58,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:58,847 INFO L87 Difference]: Start difference. First operand 11022 states and 18001 transitions. Second operand 3 states. [2020-07-21 02:27:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:59,278 INFO L93 Difference]: Finished difference Result 32810 states and 53558 transitions. [2020-07-21 02:27:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:59,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:27:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:59,339 INFO L225 Difference]: With dead ends: 32810 [2020-07-21 02:27:59,339 INFO L226 Difference]: Without dead ends: 21932 [2020-07-21 02:27:59,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2020-07-21 02:28:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 11120. [2020-07-21 02:28:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11120 states. [2020-07-21 02:28:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11120 states to 11120 states and 18152 transitions. [2020-07-21 02:28:00,599 INFO L78 Accepts]: Start accepts. Automaton has 11120 states and 18152 transitions. Word has length 495 [2020-07-21 02:28:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:00,599 INFO L479 AbstractCegarLoop]: Abstraction has 11120 states and 18152 transitions. [2020-07-21 02:28:00,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 11120 states and 18152 transitions. [2020-07-21 02:28:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:28:00,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:00,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:00,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:00,837 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times [2020-07-21 02:28:00,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:00,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833240326] [2020-07-21 02:28:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:01,250 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:01,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:01,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:01,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833240326] [2020-07-21 02:28:01,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:01,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:01,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041669333] [2020-07-21 02:28:01,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:01,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:01,368 INFO L87 Difference]: Start difference. First operand 11120 states and 18152 transitions. Second operand 3 states. [2020-07-21 02:28:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:01,944 INFO L93 Difference]: Finished difference Result 20528 states and 33134 transitions. [2020-07-21 02:28:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:01,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:28:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:01,969 INFO L225 Difference]: With dead ends: 20528 [2020-07-21 02:28:01,969 INFO L226 Difference]: Without dead ends: 14314 [2020-07-21 02:28:01,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14314 states. [2020-07-21 02:28:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14314 to 12672. [2020-07-21 02:28:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12672 states. [2020-07-21 02:28:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12672 states to 12672 states and 20720 transitions. [2020-07-21 02:28:02,414 INFO L78 Accepts]: Start accepts. Automaton has 12672 states and 20720 transitions. Word has length 495 [2020-07-21 02:28:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:02,415 INFO L479 AbstractCegarLoop]: Abstraction has 12672 states and 20720 transitions. [2020-07-21 02:28:02,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 12672 states and 20720 transitions. [2020-07-21 02:28:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:28:02,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:02,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:02,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:02,665 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:02,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:02,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1859894242, now seen corresponding path program 1 times [2020-07-21 02:28:02,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:02,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700529447] [2020-07-21 02:28:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:03,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:03,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:03,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:03,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:03,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700529447] [2020-07-21 02:28:03,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:03,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:03,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074695682] [2020-07-21 02:28:03,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:03,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:03,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:03,237 INFO L87 Difference]: Start difference. First operand 12672 states and 20720 transitions. Second operand 3 states. [2020-07-21 02:28:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:04,330 INFO L93 Difference]: Finished difference Result 25928 states and 42042 transitions. [2020-07-21 02:28:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:04,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:28:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:04,362 INFO L225 Difference]: With dead ends: 25928 [2020-07-21 02:28:04,362 INFO L226 Difference]: Without dead ends: 17754 [2020-07-21 02:28:04,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17754 states. [2020-07-21 02:28:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17754 to 15472. [2020-07-21 02:28:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15472 states. [2020-07-21 02:28:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15472 states to 15472 states and 25376 transitions. [2020-07-21 02:28:04,916 INFO L78 Accepts]: Start accepts. Automaton has 15472 states and 25376 transitions. Word has length 495 [2020-07-21 02:28:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:04,917 INFO L479 AbstractCegarLoop]: Abstraction has 15472 states and 25376 transitions. [2020-07-21 02:28:04,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 15472 states and 25376 transitions. [2020-07-21 02:28:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:28:04,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:04,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:05,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:05,151 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1215950956, now seen corresponding path program 1 times [2020-07-21 02:28:05,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:05,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914702447] [2020-07-21 02:28:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:05,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:05,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:05,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:05,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:05,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914702447] [2020-07-21 02:28:05,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:05,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:05,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475045390] [2020-07-21 02:28:05,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:05,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:05,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:05,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:05,761 INFO L87 Difference]: Start difference. First operand 15472 states and 25376 transitions. Second operand 3 states. [2020-07-21 02:28:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:06,482 INFO L93 Difference]: Finished difference Result 46001 states and 75411 transitions. [2020-07-21 02:28:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:06,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 02:28:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:06,530 INFO L225 Difference]: With dead ends: 46001 [2020-07-21 02:28:06,531 INFO L226 Difference]: Without dead ends: 30753 [2020-07-21 02:28:06,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30753 states. [2020-07-21 02:28:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30753 to 15589. [2020-07-21 02:28:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15589 states. [2020-07-21 02:28:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15589 states to 15589 states and 25522 transitions. [2020-07-21 02:28:07,373 INFO L78 Accepts]: Start accepts. Automaton has 15589 states and 25522 transitions. Word has length 496 [2020-07-21 02:28:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:07,373 INFO L479 AbstractCegarLoop]: Abstraction has 15589 states and 25522 transitions. [2020-07-21 02:28:07,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15589 states and 25522 transitions. [2020-07-21 02:28:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 02:28:07,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:07,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:07,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:07,604 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1122412706, now seen corresponding path program 1 times [2020-07-21 02:28:07,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:07,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128902498] [2020-07-21 02:28:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:07,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:07,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:08,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:08,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128902498] [2020-07-21 02:28:08,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:08,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:08,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805635011] [2020-07-21 02:28:08,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:08,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:08,119 INFO L87 Difference]: Start difference. First operand 15589 states and 25522 transitions. Second operand 3 states. [2020-07-21 02:28:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:09,085 INFO L93 Difference]: Finished difference Result 45223 states and 74011 transitions. [2020-07-21 02:28:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:09,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 02:28:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:09,114 INFO L225 Difference]: With dead ends: 45223 [2020-07-21 02:28:09,115 INFO L226 Difference]: Without dead ends: 30399 [2020-07-21 02:28:09,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30399 states. [2020-07-21 02:28:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30399 to 15741. [2020-07-21 02:28:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15741 states. [2020-07-21 02:28:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15741 states to 15741 states and 25746 transitions. [2020-07-21 02:28:09,735 INFO L78 Accepts]: Start accepts. Automaton has 15741 states and 25746 transitions. Word has length 497 [2020-07-21 02:28:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:09,735 INFO L479 AbstractCegarLoop]: Abstraction has 15741 states and 25746 transitions. [2020-07-21 02:28:09,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 15741 states and 25746 transitions. [2020-07-21 02:28:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:28:09,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:09,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:09,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:09,947 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1053014495, now seen corresponding path program 1 times [2020-07-21 02:28:09,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:09,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890646522] [2020-07-21 02:28:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:10,297 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:10,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:10,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:10,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890646522] [2020-07-21 02:28:10,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:10,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:10,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977806703] [2020-07-21 02:28:10,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:10,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:10,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:10,411 INFO L87 Difference]: Start difference. First operand 15741 states and 25746 transitions. Second operand 3 states. [2020-07-21 02:28:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:11,624 INFO L93 Difference]: Finished difference Result 45480 states and 74368 transitions. [2020-07-21 02:28:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:11,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 02:28:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:11,656 INFO L225 Difference]: With dead ends: 45480 [2020-07-21 02:28:11,656 INFO L226 Difference]: Without dead ends: 30638 [2020-07-21 02:28:11,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30638 states. [2020-07-21 02:28:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30638 to 15980. [2020-07-21 02:28:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15980 states. [2020-07-21 02:28:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15980 states to 15980 states and 26058 transitions. [2020-07-21 02:28:12,335 INFO L78 Accepts]: Start accepts. Automaton has 15980 states and 26058 transitions. Word has length 498 [2020-07-21 02:28:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:12,335 INFO L479 AbstractCegarLoop]: Abstraction has 15980 states and 26058 transitions. [2020-07-21 02:28:12,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 15980 states and 26058 transitions. [2020-07-21 02:28:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:28:12,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:12,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:12,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:12,558 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1989014165, now seen corresponding path program 1 times [2020-07-21 02:28:12,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:12,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460419220] [2020-07-21 02:28:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:13,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:13,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:13,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:13,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460419220] [2020-07-21 02:28:13,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:13,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:28:13,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282092971] [2020-07-21 02:28:13,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:28:13,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:28:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:28:13,487 INFO L87 Difference]: Start difference. First operand 15980 states and 26058 transitions. Second operand 5 states. [2020-07-21 02:28:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:14,840 INFO L93 Difference]: Finished difference Result 26562 states and 43123 transitions. [2020-07-21 02:28:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:28:14,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-07-21 02:28:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:14,858 INFO L225 Difference]: With dead ends: 26562 [2020-07-21 02:28:14,859 INFO L226 Difference]: Without dead ends: 15980 [2020-07-21 02:28:14,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:28:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15980 states. [2020-07-21 02:28:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15980 to 15980. [2020-07-21 02:28:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15980 states. [2020-07-21 02:28:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15980 states to 15980 states and 25918 transitions. [2020-07-21 02:28:15,662 INFO L78 Accepts]: Start accepts. Automaton has 15980 states and 25918 transitions. Word has length 498 [2020-07-21 02:28:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:15,662 INFO L479 AbstractCegarLoop]: Abstraction has 15980 states and 25918 transitions. [2020-07-21 02:28:15,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:28:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 15980 states and 25918 transitions. [2020-07-21 02:28:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:28:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:15,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:15,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:15,873 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash -860169328, now seen corresponding path program 1 times [2020-07-21 02:28:15,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:15,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761452962] [2020-07-21 02:28:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:16,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:16,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:16,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:16,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761452962] [2020-07-21 02:28:16,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:16,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:16,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129650956] [2020-07-21 02:28:16,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:16,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:16,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:16,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:16,551 INFO L87 Difference]: Start difference. First operand 15980 states and 25918 transitions. Second operand 4 states. [2020-07-21 02:28:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:18,048 INFO L93 Difference]: Finished difference Result 46975 states and 76244 transitions. [2020-07-21 02:28:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:18,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 02:28:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:18,076 INFO L225 Difference]: With dead ends: 46975 [2020-07-21 02:28:18,076 INFO L226 Difference]: Without dead ends: 31310 [2020-07-21 02:28:18,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:28:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31310 states. [2020-07-21 02:28:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31310 to 31234. [2020-07-21 02:28:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31234 states. [2020-07-21 02:28:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31234 states to 31234 states and 50496 transitions. [2020-07-21 02:28:19,314 INFO L78 Accepts]: Start accepts. Automaton has 31234 states and 50496 transitions. Word has length 498 [2020-07-21 02:28:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:19,314 INFO L479 AbstractCegarLoop]: Abstraction has 31234 states and 50496 transitions. [2020-07-21 02:28:19,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 31234 states and 50496 transitions. [2020-07-21 02:28:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 02:28:19,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:19,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:19,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:19,539 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -369762384, now seen corresponding path program 1 times [2020-07-21 02:28:19,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:19,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752287335] [2020-07-21 02:28:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:19,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:19,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:20,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:20,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752287335] [2020-07-21 02:28:20,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:20,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:20,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111691174] [2020-07-21 02:28:20,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:20,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:20,262 INFO L87 Difference]: Start difference. First operand 31234 states and 50496 transitions. Second operand 3 states. [2020-07-21 02:28:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:23,678 INFO L93 Difference]: Finished difference Result 88638 states and 143244 transitions. [2020-07-21 02:28:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:23,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 02:28:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:23,735 INFO L225 Difference]: With dead ends: 88638 [2020-07-21 02:28:23,735 INFO L226 Difference]: Without dead ends: 60208 [2020-07-21 02:28:23,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60208 states. [2020-07-21 02:28:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60208 to 60170. [2020-07-21 02:28:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60170 states. [2020-07-21 02:28:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60170 states to 60170 states and 96928 transitions. [2020-07-21 02:28:26,361 INFO L78 Accepts]: Start accepts. Automaton has 60170 states and 96928 transitions. Word has length 500 [2020-07-21 02:28:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:26,361 INFO L479 AbstractCegarLoop]: Abstraction has 60170 states and 96928 transitions. [2020-07-21 02:28:26,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 60170 states and 96928 transitions. [2020-07-21 02:28:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:28:26,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:26,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:26,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:26,603 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1995492592, now seen corresponding path program 1 times [2020-07-21 02:28:26,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:26,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892901304] [2020-07-21 02:28:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:26,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:28:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:27,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:27,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892901304] [2020-07-21 02:28:27,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:27,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:27,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929832519] [2020-07-21 02:28:27,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:27,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:27,111 INFO L87 Difference]: Start difference. First operand 60170 states and 96928 transitions. Second operand 4 states. [2020-07-21 02:28:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:33,627 INFO L93 Difference]: Finished difference Result 170498 states and 274284 transitions. [2020-07-21 02:28:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:33,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-21 02:28:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:33,743 INFO L225 Difference]: With dead ends: 170498 [2020-07-21 02:28:33,743 INFO L226 Difference]: Without dead ends: 115424 [2020-07-21 02:28:33,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:28:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115424 states. [2020-07-21 02:28:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115424 to 64240. [2020-07-21 02:28:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64240 states. [2020-07-21 02:28:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64240 states to 64240 states and 103785 transitions. [2020-07-21 02:28:37,160 INFO L78 Accepts]: Start accepts. Automaton has 64240 states and 103785 transitions. Word has length 501 [2020-07-21 02:28:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:37,161 INFO L479 AbstractCegarLoop]: Abstraction has 64240 states and 103785 transitions. [2020-07-21 02:28:37,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64240 states and 103785 transitions. [2020-07-21 02:28:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:28:37,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:37,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:37,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:37,429 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1777082226, now seen corresponding path program 1 times [2020-07-21 02:28:37,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:37,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100220749] [2020-07-21 02:28:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:37,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:37,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:38,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:38,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100220749] [2020-07-21 02:28:38,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:38,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:38,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19804337] [2020-07-21 02:28:38,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:38,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:38,020 INFO L87 Difference]: Start difference. First operand 64240 states and 103785 transitions. Second operand 3 states. [2020-07-21 02:28:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:45,092 INFO L93 Difference]: Finished difference Result 186208 states and 301098 transitions. [2020-07-21 02:28:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:45,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 02:28:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:45,228 INFO L225 Difference]: With dead ends: 186208 [2020-07-21 02:28:45,229 INFO L226 Difference]: Without dead ends: 125889 [2020-07-21 02:28:45,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125889 states. [2020-07-21 02:28:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125889 to 125887. [2020-07-21 02:28:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125887 states. [2020-07-21 02:28:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125887 states to 125887 states and 202844 transitions. [2020-07-21 02:28:53,815 INFO L78 Accepts]: Start accepts. Automaton has 125887 states and 202844 transitions. Word has length 501 [2020-07-21 02:28:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:53,815 INFO L479 AbstractCegarLoop]: Abstraction has 125887 states and 202844 transitions. [2020-07-21 02:28:53,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 125887 states and 202844 transitions. [2020-07-21 02:28:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:28:53,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:53,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:54,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:54,081 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash -342290349, now seen corresponding path program 1 times [2020-07-21 02:28:54,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:54,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331900556] [2020-07-21 02:28:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:54,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:54,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:54,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:54,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331900556] [2020-07-21 02:28:54,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:54,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:54,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922590567] [2020-07-21 02:28:54,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:54,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:54,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:54,548 INFO L87 Difference]: Start difference. First operand 125887 states and 202844 transitions. Second operand 3 states. [2020-07-21 02:29:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:08,508 INFO L93 Difference]: Finished difference Result 375686 states and 605239 transitions. [2020-07-21 02:29:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:29:08,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 02:29:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:08,990 INFO L225 Difference]: With dead ends: 375686 [2020-07-21 02:29:08,990 INFO L226 Difference]: Without dead ends: 250242 [2020-07-21 02:29:09,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250242 states. [2020-07-21 02:29:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250242 to 125808. [2020-07-21 02:29:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125808 states. [2020-07-21 02:29:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125808 states to 125808 states and 202697 transitions. [2020-07-21 02:29:16,462 INFO L78 Accepts]: Start accepts. Automaton has 125808 states and 202697 transitions. Word has length 501 [2020-07-21 02:29:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:16,462 INFO L479 AbstractCegarLoop]: Abstraction has 125808 states and 202697 transitions. [2020-07-21 02:29:16,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:29:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 125808 states and 202697 transitions. [2020-07-21 02:29:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 02:29:16,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:16,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:16,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:16,732 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2090726380, now seen corresponding path program 1 times [2020-07-21 02:29:16,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:16,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26246242] [2020-07-21 02:29:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:17,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:17,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:17,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26246242] [2020-07-21 02:29:17,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:17,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:17,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611095781] [2020-07-21 02:29:17,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:17,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:17,652 INFO L87 Difference]: Start difference. First operand 125808 states and 202697 transitions. Second operand 3 states. [2020-07-21 02:29:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:32,095 INFO L93 Difference]: Finished difference Result 374471 states and 603429 transitions. [2020-07-21 02:29:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:29:32,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 02:29:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:32,397 INFO L225 Difference]: With dead ends: 374471 [2020-07-21 02:29:32,397 INFO L226 Difference]: Without dead ends: 249154 [2020-07-21 02:29:32,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249154 states. [2020-07-21 02:29:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249154 to 125735. [2020-07-21 02:29:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125735 states. [2020-07-21 02:29:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125735 states to 125735 states and 202563 transitions. [2020-07-21 02:29:40,873 INFO L78 Accepts]: Start accepts. Automaton has 125735 states and 202563 transitions. Word has length 502 [2020-07-21 02:29:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:40,873 INFO L479 AbstractCegarLoop]: Abstraction has 125735 states and 202563 transitions. [2020-07-21 02:29:40,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:29:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 125735 states and 202563 transitions. [2020-07-21 02:29:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 02:29:40,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:40,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:41,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:41,151 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1409119127, now seen corresponding path program 1 times [2020-07-21 02:29:41,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:41,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028132692] [2020-07-21 02:29:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:41,507 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:41,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:29:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:41,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:41,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028132692] [2020-07-21 02:29:41,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:41,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:29:41,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963684868] [2020-07-21 02:29:41,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:29:41,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:29:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:29:41,644 INFO L87 Difference]: Start difference. First operand 125735 states and 202563 transitions. Second operand 4 states. [2020-07-21 02:29:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:53,234 INFO L93 Difference]: Finished difference Result 284723 states and 461181 transitions. [2020-07-21 02:29:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:53,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-07-21 02:29:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:53,413 INFO L225 Difference]: With dead ends: 284723 [2020-07-21 02:29:53,413 INFO L226 Difference]: Without dead ends: 143540 [2020-07-21 02:29:53,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143540 states. [2020-07-21 02:30:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143540 to 142538. [2020-07-21 02:30:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142538 states. [2020-07-21 02:30:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142538 states to 142538 states and 230192 transitions. [2020-07-21 02:30:01,712 INFO L78 Accepts]: Start accepts. Automaton has 142538 states and 230192 transitions. Word has length 503 [2020-07-21 02:30:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:01,712 INFO L479 AbstractCegarLoop]: Abstraction has 142538 states and 230192 transitions. [2020-07-21 02:30:01,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 142538 states and 230192 transitions. [2020-07-21 02:30:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 02:30:01,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:01,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:01,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:01,999 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1985135797, now seen corresponding path program 1 times [2020-07-21 02:30:02,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:02,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006030862] [2020-07-21 02:30:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:02,357 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:02,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:30:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:02,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:02,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006030862] [2020-07-21 02:30:02,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:02,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:02,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539901104] [2020-07-21 02:30:02,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:02,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:02,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:02,793 INFO L87 Difference]: Start difference. First operand 142538 states and 230192 transitions. Second operand 4 states. [2020-07-21 02:30:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:15,230 INFO L93 Difference]: Finished difference Result 325736 states and 528296 transitions. [2020-07-21 02:30:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:15,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 02:30:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:15,431 INFO L225 Difference]: With dead ends: 325736 [2020-07-21 02:30:15,431 INFO L226 Difference]: Without dead ends: 168795 [2020-07-21 02:30:15,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:30:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168795 states. [2020-07-21 02:30:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168795 to 168793. [2020-07-21 02:30:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168793 states. [2020-07-21 02:30:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168793 states to 168793 states and 273253 transitions. [2020-07-21 02:30:29,644 INFO L78 Accepts]: Start accepts. Automaton has 168793 states and 273253 transitions. Word has length 505 [2020-07-21 02:30:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:29,644 INFO L479 AbstractCegarLoop]: Abstraction has 168793 states and 273253 transitions. [2020-07-21 02:30:29,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 168793 states and 273253 transitions. [2020-07-21 02:30:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 02:30:29,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:29,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (22)] Forcibly destroying the process [2020-07-21 02:30:30,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:30,037 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 535812841, now seen corresponding path program 1 times [2020-07-21 02:30:30,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:30,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777033806] [2020-07-21 02:30:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:30,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:30,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:30,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:30,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:30,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:30,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777033806] [2020-07-21 02:30:30,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:30,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:30,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698119875] [2020-07-21 02:30:30,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:30,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:30,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:30,577 INFO L87 Difference]: Start difference. First operand 168793 states and 273253 transitions. Second operand 3 states. [2020-07-21 02:30:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:43,351 INFO L93 Difference]: Finished difference Result 309165 states and 496279 transitions. [2020-07-21 02:30:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:43,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 02:30:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:43,606 INFO L225 Difference]: With dead ends: 309165 [2020-07-21 02:30:43,606 INFO L226 Difference]: Without dead ends: 224731 [2020-07-21 02:30:43,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224731 states. [2020-07-21 02:31:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224731 to 208217. [2020-07-21 02:31:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208217 states. [2020-07-21 02:31:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208217 states to 208217 states and 337285 transitions. [2020-07-21 02:31:02,431 INFO L78 Accepts]: Start accepts. Automaton has 208217 states and 337285 transitions. Word has length 506 [2020-07-21 02:31:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:02,431 INFO L479 AbstractCegarLoop]: Abstraction has 208217 states and 337285 transitions. [2020-07-21 02:31:02,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 208217 states and 337285 transitions. [2020-07-21 02:31:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:31:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:02,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:02,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:02,753 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:02,754 INFO L82 PathProgramCache]: Analyzing trace with hash 145568779, now seen corresponding path program 1 times [2020-07-21 02:31:02,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:02,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442417107] [2020-07-21 02:31:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:03,504 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:31:03,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:31:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:03,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:03,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442417107] [2020-07-21 02:31:03,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:03,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:31:03,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190586555] [2020-07-21 02:31:03,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:31:03,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:31:03,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:03,612 INFO L87 Difference]: Start difference. First operand 208217 states and 337285 transitions. Second operand 3 states. [2020-07-21 02:31:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:22,043 INFO L93 Difference]: Finished difference Result 414013 states and 670247 transitions. [2020-07-21 02:31:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:31:22,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 02:31:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:22,415 INFO L225 Difference]: With dead ends: 414013 [2020-07-21 02:31:22,415 INFO L226 Difference]: Without dead ends: 294875 [2020-07-21 02:31:22,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294875 states. [2020-07-21 02:31:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294875 to 279449. [2020-07-21 02:31:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279449 states. [2020-07-21 02:31:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279449 states to 279449 states and 452261 transitions. [2020-07-21 02:31:46,322 INFO L78 Accepts]: Start accepts. Automaton has 279449 states and 452261 transitions. Word has length 507 [2020-07-21 02:31:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:46,322 INFO L479 AbstractCegarLoop]: Abstraction has 279449 states and 452261 transitions. [2020-07-21 02:31:46,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 279449 states and 452261 transitions. [2020-07-21 02:31:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:31:46,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:46,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:46,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:46,637 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 715575988, now seen corresponding path program 1 times [2020-07-21 02:31:46,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:46,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202714749] [2020-07-21 02:31:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:46,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:46,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:31:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:47,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:47,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202714749] [2020-07-21 02:31:47,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:47,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:31:47,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934876144] [2020-07-21 02:31:47,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:31:47,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:31:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:47,127 INFO L87 Difference]: Start difference. First operand 279449 states and 452261 transitions. Second operand 3 states. [2020-07-21 02:32:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:26,253 INFO L93 Difference]: Finished difference Result 787875 states and 1270017 transitions. [2020-07-21 02:32:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:32:26,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 02:32:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:26,990 INFO L225 Difference]: With dead ends: 787875 [2020-07-21 02:32:26,990 INFO L226 Difference]: Without dead ends: 533881 [2020-07-21 02:32:27,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533881 states. [2020-07-21 02:32:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533881 to 283075. [2020-07-21 02:32:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283075 states. [2020-07-21 02:32:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283075 states to 283075 states and 457723 transitions. [2020-07-21 02:32:54,072 INFO L78 Accepts]: Start accepts. Automaton has 283075 states and 457723 transitions. Word has length 507 [2020-07-21 02:32:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:54,073 INFO L479 AbstractCegarLoop]: Abstraction has 283075 states and 457723 transitions. [2020-07-21 02:32:54,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:32:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 283075 states and 457723 transitions. [2020-07-21 02:32:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:32:54,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:54,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:32:54,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:54,391 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash 53774278, now seen corresponding path program 1 times [2020-07-21 02:32:54,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:54,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535341604] [2020-07-21 02:32:54,393 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:54,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:32:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:32:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:56,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:56,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535341604] [2020-07-21 02:32:56,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:56,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:32:56,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221594949] [2020-07-21 02:32:56,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:32:56,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:32:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:32:56,030 INFO L87 Difference]: Start difference. First operand 283075 states and 457723 transitions. Second operand 4 states. [2020-07-21 02:33:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:39,754 INFO L93 Difference]: Finished difference Result 838059 states and 1355320 transitions. [2020-07-21 02:33:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:33:39,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-21 02:33:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:40,488 INFO L225 Difference]: With dead ends: 838059 [2020-07-21 02:33:40,488 INFO L226 Difference]: Without dead ends: 556189 [2020-07-21 02:33:40,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:33:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556189 states. [2020-07-21 02:34:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556189 to 556187. [2020-07-21 02:34:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556187 states. [2020-07-21 02:34:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556187 states to 556187 states and 896132 transitions. [2020-07-21 02:34:35,597 INFO L78 Accepts]: Start accepts. Automaton has 556187 states and 896132 transitions. Word has length 507 [2020-07-21 02:34:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:34:35,598 INFO L479 AbstractCegarLoop]: Abstraction has 556187 states and 896132 transitions. [2020-07-21 02:34:35,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:34:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 556187 states and 896132 transitions. [2020-07-21 02:34:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 02:34:35,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:34:35,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:34:36,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:34:36,035 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:34:36,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:34:36,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1940876320, now seen corresponding path program 1 times [2020-07-21 02:34:36,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:34:36,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499716387] [2020-07-21 02:34:36,037 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:34:36,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:34:36,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:34:36,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1761 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:34:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:34:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:34:36,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:34:36,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499716387] [2020-07-21 02:34:36,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:34:36,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:34:36,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768959315] [2020-07-21 02:34:36,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:34:36,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:34:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:34:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:34:36,498 INFO L87 Difference]: Start difference. First operand 556187 states and 896132 transitions. Second operand 3 states. [2020-07-21 02:36:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:36:01,848 INFO L93 Difference]: Finished difference Result 1566706 states and 2514605 transitions. [2020-07-21 02:36:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:36:01,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-21 02:36:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:36:03,281 INFO L225 Difference]: With dead ends: 1566706 [2020-07-21 02:36:03,281 INFO L226 Difference]: Without dead ends: 1062443 [2020-07-21 02:36:03,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:36:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062443 states. [2020-07-21 02:37:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062443 to 566213. [2020-07-21 02:37:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566213 states. [2020-07-21 02:37:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566213 states to 566213 states and 910422 transitions. [2020-07-21 02:37:18,334 INFO L78 Accepts]: Start accepts. Automaton has 566213 states and 910422 transitions. Word has length 509 [2020-07-21 02:37:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:37:18,335 INFO L479 AbstractCegarLoop]: Abstraction has 566213 states and 910422 transitions. [2020-07-21 02:37:18,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:37:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 566213 states and 910422 transitions. [2020-07-21 02:37:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 02:37:18,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:37:18,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:37:18,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:37:18,771 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:37:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:37:18,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1759268722, now seen corresponding path program 1 times [2020-07-21 02:37:18,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:37:18,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120342597] [2020-07-21 02:37:18,773 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:37:19,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:37:19,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:37:19,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:37:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:37:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:37:19,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:37:19,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120342597] [2020-07-21 02:37:19,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:37:19,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:37:19,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777295550] [2020-07-21 02:37:19,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:37:19,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:37:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:37:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:37:19,363 INFO L87 Difference]: Start difference. First operand 566213 states and 910422 transitions. Second operand 3 states. [2020-07-21 02:38:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:38:58,174 INFO L93 Difference]: Finished difference Result 1633047 states and 2622296 transitions. [2020-07-21 02:38:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:38:58,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-21 02:38:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:38:59,764 INFO L225 Difference]: With dead ends: 1633047 [2020-07-21 02:38:59,765 INFO L226 Difference]: Without dead ends: 1108055 [2020-07-21 02:39:00,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:39:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108055 states.