/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.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:49:38,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:49:38,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:49:38,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:49:38,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:49:38,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:49:38,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:49:38,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:49:38,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:49:38,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:49:38,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:49:38,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:49:38,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:49:38,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:49:38,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:49:38,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:49:38,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:49:38,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:49:38,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:49:38,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:49:38,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:49:38,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:49:38,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:49:38,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:49:38,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:49:38,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:49:38,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:49:38,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:49:38,380 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 23:49:38,394 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:49:38,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:49:38,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:49:38,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:49:38,396 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:49:38,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:49:38,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:49:38,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:49:38,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:49:38,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:49:38,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:49:38,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:49:38,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:49:38,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:49:38,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:49:38,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:49:38,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:49:38,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:49:38,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:49:38,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:49:38,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:49:38,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:49:38,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:49:38,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:49:38,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:49:38,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:49:38,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:38,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:49:38,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:49:38,401 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 23:49:38,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:49:38,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:49:38,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:49:38,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:49:38,689 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:49:38,690 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 23:49:38,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7fe9cf0/cd6effbcc5a34053a4cf274e7468860c/FLAG2d4bc5bdc [2020-07-21 23:49:39,465 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:49:39,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 23:49:39,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7fe9cf0/cd6effbcc5a34053a4cf274e7468860c/FLAG2d4bc5bdc [2020-07-21 23:49:39,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7fe9cf0/cd6effbcc5a34053a4cf274e7468860c [2020-07-21 23:49:39,620 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:49:39,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:49:39,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:49:39,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:49:39,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:49:39,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:49:39" (1/1) ... [2020-07-21 23:49:39,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe5829c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:39, skipping insertion in model container [2020-07-21 23:49:39,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:49:39" (1/1) ... [2020-07-21 23:49:39,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:49:39,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:49:40,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:49:40,824 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:49:41,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:49:41,313 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:49:41,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41 WrapperNode [2020-07-21 23:49:41,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:49:41,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:49:41,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:49:41,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:49:41,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (1/1) ... [2020-07-21 23:49:41,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:49:41,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:49:41,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:49:41,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:49:41,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (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 23:49:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:49:41,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:49:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:49:41,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:49:41,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:49:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:49:41,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:49:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:49:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:49:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:49:41,669 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:49:41,669 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:49:41,669 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:49:41,669 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:49:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:49:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:49:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:49:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:49:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:49:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:49:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:49:44,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:49:44,645 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:49:44,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:49:44 BoogieIcfgContainer [2020-07-21 23:49:44,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:49:44,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:49:44,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:49:44,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:49:44,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:49:39" (1/3) ... [2020-07-21 23:49:44,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2121c221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:49:44, skipping insertion in model container [2020-07-21 23:49:44,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:49:41" (2/3) ... [2020-07-21 23:49:44,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2121c221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:49:44, skipping insertion in model container [2020-07-21 23:49:44,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:49:44" (3/3) ... [2020-07-21 23:49:44,662 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 23:49:44,672 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:49:44,686 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:49:44,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:49:44,726 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:49:44,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:49:44,726 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:49:44,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:49:44,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:49:44,727 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:49:44,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:49:44,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:49:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 23:49:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 23:49:44,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:44,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:44,806 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 23:49:44,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:44,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278572431] [2020-07-21 23:49:44,821 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 23:49:45,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:49:45,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:49:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:45,711 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 23:49:45,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:45,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278572431] [2020-07-21 23:49:45,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:45,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:49:45,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264552052] [2020-07-21 23:49:45,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:49:45,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:49:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:49:45,734 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 23:49:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:46,142 INFO L93 Difference]: Finished difference Result 2303 states and 4091 transitions. [2020-07-21 23:49:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:49:46,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 23:49:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:46,184 INFO L225 Difference]: With dead ends: 2303 [2020-07-21 23:49:46,185 INFO L226 Difference]: Without dead ends: 1529 [2020-07-21 23:49:46,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 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 23:49:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2020-07-21 23:49:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2020-07-21 23:49:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2020-07-21 23:49:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2371 transitions. [2020-07-21 23:49:46,395 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2371 transitions. Word has length 324 [2020-07-21 23:49:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:46,397 INFO L479 AbstractCegarLoop]: Abstraction has 1527 states and 2371 transitions. [2020-07-21 23:49:46,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:49:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2371 transitions. [2020-07-21 23:49:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 23:49:46,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:46,412 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] [2020-07-21 23:49:46,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:46,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash -348485848, now seen corresponding path program 1 times [2020-07-21 23:49:46,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:46,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655590846] [2020-07-21 23:49:46,630 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 23:49:47,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:49:47,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:47,222 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 23:49:47,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:47,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655590846] [2020-07-21 23:49:47,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:47,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:47,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668512839] [2020-07-21 23:49:47,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:47,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:47,227 INFO L87 Difference]: Start difference. First operand 1527 states and 2371 transitions. Second operand 3 states. [2020-07-21 23:49:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:47,399 INFO L93 Difference]: Finished difference Result 4375 states and 6762 transitions. [2020-07-21 23:49:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:47,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 23:49:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:47,416 INFO L225 Difference]: With dead ends: 4375 [2020-07-21 23:49:47,417 INFO L226 Difference]: Without dead ends: 2935 [2020-07-21 23:49:47,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 23:49:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2020-07-21 23:49:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2933. [2020-07-21 23:49:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-07-21 23:49:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4519 transitions. [2020-07-21 23:49:47,545 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4519 transitions. Word has length 326 [2020-07-21 23:49:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:47,546 INFO L479 AbstractCegarLoop]: Abstraction has 2933 states and 4519 transitions. [2020-07-21 23:49:47,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4519 transitions. [2020-07-21 23:49:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 23:49:47,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:47,558 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] [2020-07-21 23:49:47,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:47,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1549040403, now seen corresponding path program 1 times [2020-07-21 23:49:47,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:47,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825499797] [2020-07-21 23:49:47,774 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 23:49:48,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:48,235 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 23:49:48,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:48,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825499797] [2020-07-21 23:49:48,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:48,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:48,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324914117] [2020-07-21 23:49:48,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:48,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:48,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:48,238 INFO L87 Difference]: Start difference. First operand 2933 states and 4519 transitions. Second operand 3 states. [2020-07-21 23:49:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:48,469 INFO L93 Difference]: Finished difference Result 8702 states and 13391 transitions. [2020-07-21 23:49:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:48,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 23:49:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:48,498 INFO L225 Difference]: With dead ends: 8702 [2020-07-21 23:49:48,498 INFO L226 Difference]: Without dead ends: 5811 [2020-07-21 23:49:48,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 23:49:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2020-07-21 23:49:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 2943. [2020-07-21 23:49:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2943 states. [2020-07-21 23:49:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4533 transitions. [2020-07-21 23:49:48,661 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4533 transitions. Word has length 326 [2020-07-21 23:49:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:48,661 INFO L479 AbstractCegarLoop]: Abstraction has 2943 states and 4533 transitions. [2020-07-21 23:49:48,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4533 transitions. [2020-07-21 23:49:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 23:49:48,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:48,672 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] [2020-07-21 23:49:48,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:48,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1589385571, now seen corresponding path program 1 times [2020-07-21 23:49:48,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:48,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285671170] [2020-07-21 23:49:48,887 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 23:49:49,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:49,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:49,317 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 23:49:49,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:49,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285671170] [2020-07-21 23:49:49,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:49,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:49,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413731679] [2020-07-21 23:49:49,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:49,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:49,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:49,321 INFO L87 Difference]: Start difference. First operand 2943 states and 4533 transitions. Second operand 3 states. [2020-07-21 23:49:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:49,589 INFO L93 Difference]: Finished difference Result 8739 states and 13451 transitions. [2020-07-21 23:49:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:49,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 23:49:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:49,622 INFO L225 Difference]: With dead ends: 8739 [2020-07-21 23:49:49,622 INFO L226 Difference]: Without dead ends: 5840 [2020-07-21 23:49:49,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 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 23:49:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2020-07-21 23:49:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 2958. [2020-07-21 23:49:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2958 states. [2020-07-21 23:49:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 4554 transitions. [2020-07-21 23:49:49,804 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 4554 transitions. Word has length 327 [2020-07-21 23:49:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:49,805 INFO L479 AbstractCegarLoop]: Abstraction has 2958 states and 4554 transitions. [2020-07-21 23:49:49,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 4554 transitions. [2020-07-21 23:49:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 23:49:49,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:49,819 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] [2020-07-21 23:49:50,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:50,033 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -326688029, now seen corresponding path program 1 times [2020-07-21 23:49:50,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:50,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440813706] [2020-07-21 23:49:50,034 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 23:49:50,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:50,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:50,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:49:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:50,460 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 23:49:50,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:50,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440813706] [2020-07-21 23:49:50,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:50,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:49:50,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406787004] [2020-07-21 23:49:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:49:50,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:49:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:49:50,463 INFO L87 Difference]: Start difference. First operand 2958 states and 4554 transitions. Second operand 4 states. [2020-07-21 23:49:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:50,725 INFO L93 Difference]: Finished difference Result 6298 states and 9706 transitions. [2020-07-21 23:49:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:49:50,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 23:49:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:50,742 INFO L225 Difference]: With dead ends: 6298 [2020-07-21 23:49:50,742 INFO L226 Difference]: Without dead ends: 3357 [2020-07-21 23:49:50,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 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 23:49:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2020-07-21 23:49:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3025. [2020-07-21 23:49:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3025 states. [2020-07-21 23:49:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4661 transitions. [2020-07-21 23:49:50,887 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4661 transitions. Word has length 328 [2020-07-21 23:49:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:50,889 INFO L479 AbstractCegarLoop]: Abstraction has 3025 states and 4661 transitions. [2020-07-21 23:49:50,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:49:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4661 transitions. [2020-07-21 23:49:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 23:49:50,897 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:50,897 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] [2020-07-21 23:49:51,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:51,111 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1639482187, now seen corresponding path program 1 times [2020-07-21 23:49:51,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:51,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974574464] [2020-07-21 23:49:51,112 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 23:49:51,460 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:51,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:51,551 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 23:49:51,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:51,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974574464] [2020-07-21 23:49:51,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:51,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:51,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237108627] [2020-07-21 23:49:51,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:51,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:51,564 INFO L87 Difference]: Start difference. First operand 3025 states and 4661 transitions. Second operand 3 states. [2020-07-21 23:49:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:51,852 INFO L93 Difference]: Finished difference Result 9029 states and 13912 transitions. [2020-07-21 23:49:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:51,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 23:49:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:51,901 INFO L225 Difference]: With dead ends: 9029 [2020-07-21 23:49:51,901 INFO L226 Difference]: Without dead ends: 6024 [2020-07-21 23:49:51,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 23:49:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2020-07-21 23:49:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 3032. [2020-07-21 23:49:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3032 states. [2020-07-21 23:49:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4671 transitions. [2020-07-21 23:49:52,079 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4671 transitions. Word has length 330 [2020-07-21 23:49:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:52,080 INFO L479 AbstractCegarLoop]: Abstraction has 3032 states and 4671 transitions. [2020-07-21 23:49:52,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4671 transitions. [2020-07-21 23:49:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 23:49:52,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:52,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:52,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:52,302 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash -920947079, now seen corresponding path program 1 times [2020-07-21 23:49:52,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:52,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014380908] [2020-07-21 23:49:52,303 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 23:49:52,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:52,702 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 23:49:52,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:52,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014380908] [2020-07-21 23:49:52,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:52,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:52,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460115444] [2020-07-21 23:49:52,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:52,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:52,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:52,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:52,705 INFO L87 Difference]: Start difference. First operand 3032 states and 4671 transitions. Second operand 3 states. [2020-07-21 23:49:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:52,957 INFO L93 Difference]: Finished difference Result 9057 states and 13954 transitions. [2020-07-21 23:49:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:52,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 23:49:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:52,971 INFO L225 Difference]: With dead ends: 9057 [2020-07-21 23:49:52,971 INFO L226 Difference]: Without dead ends: 6043 [2020-07-21 23:49:52,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 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 23:49:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2020-07-21 23:49:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 3046. [2020-07-21 23:49:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3046 states. [2020-07-21 23:49:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 4691 transitions. [2020-07-21 23:49:53,129 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 4691 transitions. Word has length 331 [2020-07-21 23:49:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:53,129 INFO L479 AbstractCegarLoop]: Abstraction has 3046 states and 4691 transitions. [2020-07-21 23:49:53,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 4691 transitions. [2020-07-21 23:49:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:49:53,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:53,137 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] [2020-07-21 23:49:53,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:53,351 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash 937671629, now seen corresponding path program 1 times [2020-07-21 23:49:53,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:53,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304282611] [2020-07-21 23:49:53,352 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 23:49:53,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:49:53,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:53,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:53,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:53,784 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 23:49:53,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:53,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304282611] [2020-07-21 23:49:53,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:53,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:53,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955847787] [2020-07-21 23:49:53,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:53,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:53,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:53,787 INFO L87 Difference]: Start difference. First operand 3046 states and 4691 transitions. Second operand 3 states. [2020-07-21 23:49:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:54,084 INFO L93 Difference]: Finished difference Result 6478 states and 10021 transitions. [2020-07-21 23:49:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:54,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:49:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:54,095 INFO L225 Difference]: With dead ends: 6478 [2020-07-21 23:49:54,095 INFO L226 Difference]: Without dead ends: 4240 [2020-07-21 23:49:54,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 23:49:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2020-07-21 23:49:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3550. [2020-07-21 23:49:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3550 states. [2020-07-21 23:49:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5519 transitions. [2020-07-21 23:49:54,332 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5519 transitions. Word has length 332 [2020-07-21 23:49:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:54,333 INFO L479 AbstractCegarLoop]: Abstraction has 3550 states and 5519 transitions. [2020-07-21 23:49:54,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5519 transitions. [2020-07-21 23:49:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:49:54,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:54,341 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] [2020-07-21 23:49:54,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:54,555 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 23:49:54,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:54,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032910815] [2020-07-21 23:49:54,556 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 23:49:54,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:49:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:49:54,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:55,134 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 23:49:55,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:55,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032910815] [2020-07-21 23:49:55,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:55,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:49:55,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954441135] [2020-07-21 23:49:55,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:49:55,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:49:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:49:55,137 INFO L87 Difference]: Start difference. First operand 3550 states and 5519 transitions. Second operand 8 states. [2020-07-21 23:49:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:57,142 INFO L93 Difference]: Finished difference Result 10083 states and 15833 transitions. [2020-07-21 23:49:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:49:57,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 23:49:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:57,161 INFO L225 Difference]: With dead ends: 10083 [2020-07-21 23:49:57,161 INFO L226 Difference]: Without dead ends: 7565 [2020-07-21 23:49:57,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 23:49:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2020-07-21 23:49:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 4923. [2020-07-21 23:49:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4923 states. [2020-07-21 23:49:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 7615 transitions. [2020-07-21 23:49:57,427 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 7615 transitions. Word has length 332 [2020-07-21 23:49:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:57,428 INFO L479 AbstractCegarLoop]: Abstraction has 4923 states and 7615 transitions. [2020-07-21 23:49:57,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:49:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 7615 transitions. [2020-07-21 23:49:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:49:57,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:57,436 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] [2020-07-21 23:49:57,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:57,649 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1088493216, now seen corresponding path program 1 times [2020-07-21 23:49:57,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:57,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260341123] [2020-07-21 23:49:57,651 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 23:49:58,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:49:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:58,158 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 23:49:58,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:58,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260341123] [2020-07-21 23:49:58,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:58,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:58,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602790736] [2020-07-21 23:49:58,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:58,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:58,160 INFO L87 Difference]: Start difference. First operand 4923 states and 7615 transitions. Second operand 3 states. [2020-07-21 23:49:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:58,482 INFO L93 Difference]: Finished difference Result 10195 states and 15902 transitions. [2020-07-21 23:49:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:58,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:49:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:58,498 INFO L225 Difference]: With dead ends: 10195 [2020-07-21 23:49:58,498 INFO L226 Difference]: Without dead ends: 6154 [2020-07-21 23:49:58,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 23:49:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2020-07-21 23:49:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 5800. [2020-07-21 23:49:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5800 states. [2020-07-21 23:49:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 9056 transitions. [2020-07-21 23:49:58,803 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 9056 transitions. Word has length 332 [2020-07-21 23:49:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:58,803 INFO L479 AbstractCegarLoop]: Abstraction has 5800 states and 9056 transitions. [2020-07-21 23:49:58,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 9056 transitions. [2020-07-21 23:49:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:49:58,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:58,811 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] [2020-07-21 23:49:59,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:59,024 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:59,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:59,025 INFO L82 PathProgramCache]: Analyzing trace with hash -276487765, now seen corresponding path program 1 times [2020-07-21 23:49:59,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:59,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654640894] [2020-07-21 23:49:59,026 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 23:49:59,393 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:49:59,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:59,553 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 23:49:59,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:59,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654640894] [2020-07-21 23:49:59,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:59,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:59,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907953082] [2020-07-21 23:49:59,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:59,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:59,555 INFO L87 Difference]: Start difference. First operand 5800 states and 9056 transitions. Second operand 3 states. [2020-07-21 23:50:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:00,025 INFO L93 Difference]: Finished difference Result 16770 states and 26142 transitions. [2020-07-21 23:50:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:00,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:50:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:00,051 INFO L225 Difference]: With dead ends: 16770 [2020-07-21 23:50:00,051 INFO L226 Difference]: Without dead ends: 11208 [2020-07-21 23:50:00,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 23:50:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2020-07-21 23:50:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 11206. [2020-07-21 23:50:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11206 states. [2020-07-21 23:50:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 17386 transitions. [2020-07-21 23:50:00,742 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 17386 transitions. Word has length 332 [2020-07-21 23:50:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:00,742 INFO L479 AbstractCegarLoop]: Abstraction has 11206 states and 17386 transitions. [2020-07-21 23:50:00,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 17386 transitions. [2020-07-21 23:50:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:50:00,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:00,752 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] [2020-07-21 23:50:00,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:00,953 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:00,954 INFO L82 PathProgramCache]: Analyzing trace with hash -485032027, now seen corresponding path program 1 times [2020-07-21 23:50:00,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:00,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914101366] [2020-07-21 23:50:00,955 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 23:50:01,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:50:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:50:01,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:01,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914101366] [2020-07-21 23:50:01,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:01,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:50:01,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732003024] [2020-07-21 23:50:01,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:50:01,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:50:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:50:01,390 INFO L87 Difference]: Start difference. First operand 11206 states and 17386 transitions. Second operand 4 states. [2020-07-21 23:50:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:02,897 INFO L93 Difference]: Finished difference Result 31817 states and 49237 transitions. [2020-07-21 23:50:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:50:02,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 23:50:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:02,927 INFO L225 Difference]: With dead ends: 31817 [2020-07-21 23:50:02,927 INFO L226 Difference]: Without dead ends: 21128 [2020-07-21 23:50:02,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 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 23:50:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21128 states. [2020-07-21 23:50:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21128 to 11450. [2020-07-21 23:50:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11450 states. [2020-07-21 23:50:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11450 states to 11450 states and 17800 transitions. [2020-07-21 23:50:04,477 INFO L78 Accepts]: Start accepts. Automaton has 11450 states and 17800 transitions. Word has length 332 [2020-07-21 23:50:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:04,478 INFO L479 AbstractCegarLoop]: Abstraction has 11450 states and 17800 transitions. [2020-07-21 23:50:04,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:50:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 11450 states and 17800 transitions. [2020-07-21 23:50:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:50:04,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:04,486 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] [2020-07-21 23:50:04,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:04,687 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash -815790061, now seen corresponding path program 1 times [2020-07-21 23:50:04,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:04,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954107393] [2020-07-21 23:50:04,689 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 23:50:05,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:05,128 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 23:50:05,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:05,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954107393] [2020-07-21 23:50:05,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:05,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:05,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462051260] [2020-07-21 23:50:05,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:05,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:05,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:05,132 INFO L87 Difference]: Start difference. First operand 11450 states and 17800 transitions. Second operand 3 states. [2020-07-21 23:50:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:06,106 INFO L93 Difference]: Finished difference Result 32834 states and 50774 transitions. [2020-07-21 23:50:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:06,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 23:50:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:06,134 INFO L225 Difference]: With dead ends: 32834 [2020-07-21 23:50:06,134 INFO L226 Difference]: Without dead ends: 22155 [2020-07-21 23:50:06,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 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 23:50:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22155 states. [2020-07-21 23:50:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22155 to 11549. [2020-07-21 23:50:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 23:50:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17934 transitions. [2020-07-21 23:50:06,862 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17934 transitions. Word has length 334 [2020-07-21 23:50:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:06,862 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17934 transitions. [2020-07-21 23:50:06,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17934 transitions. [2020-07-21 23:50:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 23:50:06,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:06,872 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] [2020-07-21 23:50:07,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:07,080 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1417835857, now seen corresponding path program 1 times [2020-07-21 23:50:07,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:07,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541156698] [2020-07-21 23:50:07,082 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 23:50:07,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:50:07,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:50:07,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:07,700 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 23:50:07,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:07,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541156698] [2020-07-21 23:50:07,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:07,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:50:07,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174949889] [2020-07-21 23:50:07,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:50:07,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:50:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:50:07,702 INFO L87 Difference]: Start difference. First operand 11549 states and 17934 transitions. Second operand 5 states. [2020-07-21 23:50:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:08,649 INFO L93 Difference]: Finished difference Result 21275 states and 33033 transitions. [2020-07-21 23:50:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:50:08,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-07-21 23:50:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:08,666 INFO L225 Difference]: With dead ends: 21275 [2020-07-21 23:50:08,666 INFO L226 Difference]: Without dead ends: 11549 [2020-07-21 23:50:08,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 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 23:50:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11549 states. [2020-07-21 23:50:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11549 to 11549. [2020-07-21 23:50:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 23:50:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17824 transitions. [2020-07-21 23:50:09,433 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17824 transitions. Word has length 335 [2020-07-21 23:50:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:09,433 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17824 transitions. [2020-07-21 23:50:09,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:50:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17824 transitions. [2020-07-21 23:50:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 23:50:09,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:09,443 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] [2020-07-21 23:50:09,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:09,644 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:09,644 INFO L82 PathProgramCache]: Analyzing trace with hash 387279148, now seen corresponding path program 1 times [2020-07-21 23:50:09,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:09,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12882481] [2020-07-21 23:50:09,645 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 23:50:10,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:50:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:50:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:10,140 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 23:50:10,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:10,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12882481] [2020-07-21 23:50:10,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:10,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:50:10,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522774572] [2020-07-21 23:50:10,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:50:10,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:50:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:50:10,142 INFO L87 Difference]: Start difference. First operand 11549 states and 17824 transitions. Second operand 4 states. [2020-07-21 23:50:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:11,474 INFO L93 Difference]: Finished difference Result 33912 states and 52317 transitions. [2020-07-21 23:50:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:50:11,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-21 23:50:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:11,497 INFO L225 Difference]: With dead ends: 33912 [2020-07-21 23:50:11,497 INFO L226 Difference]: Without dead ends: 22534 [2020-07-21 23:50:11,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 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 23:50:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2020-07-21 23:50:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22532. [2020-07-21 23:50:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22532 states. [2020-07-21 23:50:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22532 states to 22532 states and 34549 transitions. [2020-07-21 23:50:12,864 INFO L78 Accepts]: Start accepts. Automaton has 22532 states and 34549 transitions. Word has length 335 [2020-07-21 23:50:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:12,864 INFO L479 AbstractCegarLoop]: Abstraction has 22532 states and 34549 transitions. [2020-07-21 23:50:12,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:50:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22532 states and 34549 transitions. [2020-07-21 23:50:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:50:12,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:12,880 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] [2020-07-21 23:50:13,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:13,081 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash 941612388, now seen corresponding path program 1 times [2020-07-21 23:50:13,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:13,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535589417] [2020-07-21 23:50:13,083 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 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 23:50:13,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:13,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:13,483 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 23:50:13,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:13,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535589417] [2020-07-21 23:50:13,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:13,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:13,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665631075] [2020-07-21 23:50:13,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:13,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:13,486 INFO L87 Difference]: Start difference. First operand 22532 states and 34549 transitions. Second operand 3 states. [2020-07-21 23:50:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:15,751 INFO L93 Difference]: Finished difference Result 64786 states and 98879 transitions. [2020-07-21 23:50:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:15,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:50:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:15,804 INFO L225 Difference]: With dead ends: 64786 [2020-07-21 23:50:15,804 INFO L226 Difference]: Without dead ends: 43632 [2020-07-21 23:50:15,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 23:50:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43632 states. [2020-07-21 23:50:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43632 to 22748. [2020-07-21 23:50:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22748 states. [2020-07-21 23:50:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22748 states to 22748 states and 34830 transitions. [2020-07-21 23:50:18,100 INFO L78 Accepts]: Start accepts. Automaton has 22748 states and 34830 transitions. Word has length 336 [2020-07-21 23:50:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:18,101 INFO L479 AbstractCegarLoop]: Abstraction has 22748 states and 34830 transitions. [2020-07-21 23:50:18,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 22748 states and 34830 transitions. [2020-07-21 23:50:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 23:50:18,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:18,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:50:18,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:18,328 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash 943899740, now seen corresponding path program 1 times [2020-07-21 23:50:18,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:18,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442649012] [2020-07-21 23:50:18,330 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 23:50:18,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:50:18,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:18,812 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 23:50:18,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:18,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442649012] [2020-07-21 23:50:18,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:18,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:18,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568511410] [2020-07-21 23:50:18,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:18,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:18,815 INFO L87 Difference]: Start difference. First operand 22748 states and 34830 transitions. Second operand 3 states. [2020-07-21 23:50:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:21,354 INFO L93 Difference]: Finished difference Result 66265 states and 101191 transitions. [2020-07-21 23:50:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:21,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 23:50:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:21,402 INFO L225 Difference]: With dead ends: 66265 [2020-07-21 23:50:21,402 INFO L226 Difference]: Without dead ends: 44623 [2020-07-21 23:50:21,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 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 23:50:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44623 states. [2020-07-21 23:50:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44623 to 44621. [2020-07-21 23:50:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44621 states. [2020-07-21 23:50:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44621 states to 44621 states and 67842 transitions. [2020-07-21 23:50:24,131 INFO L78 Accepts]: Start accepts. Automaton has 44621 states and 67842 transitions. Word has length 337 [2020-07-21 23:50:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:24,131 INFO L479 AbstractCegarLoop]: Abstraction has 44621 states and 67842 transitions. [2020-07-21 23:50:24,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 44621 states and 67842 transitions. [2020-07-21 23:50:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:50:25,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:25,196 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] [2020-07-21 23:50:25,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:25,397 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash -76537344, now seen corresponding path program 1 times [2020-07-21 23:50:25,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:25,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542051981] [2020-07-21 23:50:25,399 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 23:50:25,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:25,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:50:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:25,803 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 23:50:25,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:25,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542051981] [2020-07-21 23:50:25,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:25,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:50:25,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59901313] [2020-07-21 23:50:25,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:50:25,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:50:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:50:25,805 INFO L87 Difference]: Start difference. First operand 44621 states and 67842 transitions. Second operand 4 states. [2020-07-21 23:50:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:30,803 INFO L93 Difference]: Finished difference Result 130210 states and 197637 transitions. [2020-07-21 23:50:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:50:30,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 23:50:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:30,889 INFO L225 Difference]: With dead ends: 130210 [2020-07-21 23:50:30,889 INFO L226 Difference]: Without dead ends: 88718 [2020-07-21 23:50:30,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 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 23:50:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88718 states. [2020-07-21 23:50:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88718 to 47676. [2020-07-21 23:50:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 23:50:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72745 transitions. [2020-07-21 23:50:34,105 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72745 transitions. Word has length 338 [2020-07-21 23:50:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:34,105 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72745 transitions. [2020-07-21 23:50:34,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:50:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72745 transitions. [2020-07-21 23:50:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:50:34,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:34,136 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] [2020-07-21 23:50:34,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:34,349 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1346166825, now seen corresponding path program 1 times [2020-07-21 23:50:34,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:34,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45789623] [2020-07-21 23:50:34,351 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 23:50:34,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:34,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:34,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:34,733 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 23:50:34,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:34,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45789623] [2020-07-21 23:50:34,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:34,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:34,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822813751] [2020-07-21 23:50:34,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:34,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:34,735 INFO L87 Difference]: Start difference. First operand 47676 states and 72745 transitions. Second operand 3 states. [2020-07-21 23:50:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:39,621 INFO L93 Difference]: Finished difference Result 91758 states and 139339 transitions. [2020-07-21 23:50:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:39,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 23:50:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:39,694 INFO L225 Difference]: With dead ends: 91758 [2020-07-21 23:50:39,694 INFO L226 Difference]: Without dead ends: 69260 [2020-07-21 23:50:39,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 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 23:50:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69260 states. [2020-07-21 23:50:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69260 to 47676. [2020-07-21 23:50:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 23:50:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72738 transitions. [2020-07-21 23:50:42,763 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72738 transitions. Word has length 338 [2020-07-21 23:50:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:42,763 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72738 transitions. [2020-07-21 23:50:42,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72738 transitions. [2020-07-21 23:50:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:50:42,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:42,796 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] [2020-07-21 23:50:43,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:43,010 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1790781151, now seen corresponding path program 1 times [2020-07-21 23:50:43,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:43,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237415890] [2020-07-21 23:50:43,012 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 23:50:43,338 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:50:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:43,609 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 23:50:43,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:43,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237415890] [2020-07-21 23:50:43,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:43,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:50:43,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792523882] [2020-07-21 23:50:43,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:50:43,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:50:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:50:43,611 INFO L87 Difference]: Start difference. First operand 47676 states and 72738 transitions. Second operand 4 states. [2020-07-21 23:50:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:49,804 INFO L93 Difference]: Finished difference Result 128367 states and 194760 transitions. [2020-07-21 23:50:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:50:49,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 23:50:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:49,897 INFO L225 Difference]: With dead ends: 128367 [2020-07-21 23:50:49,897 INFO L226 Difference]: Without dead ends: 86453 [2020-07-21 23:50:49,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 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 23:50:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86453 states. [2020-07-21 23:50:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86453 to 50226. [2020-07-21 23:50:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50226 states. [2020-07-21 23:50:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50226 states to 50226 states and 76627 transitions. [2020-07-21 23:50:53,530 INFO L78 Accepts]: Start accepts. Automaton has 50226 states and 76627 transitions. Word has length 338 [2020-07-21 23:50:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:53,530 INFO L479 AbstractCegarLoop]: Abstraction has 50226 states and 76627 transitions. [2020-07-21 23:50:53,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:50:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50226 states and 76627 transitions. [2020-07-21 23:50:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:50:53,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:53,555 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] [2020-07-21 23:50:53,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:53,756 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:53,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2145516863, now seen corresponding path program 1 times [2020-07-21 23:50:53,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:53,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943729555] [2020-07-21 23:50:53,758 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 23:50:54,082 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:50:54,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:50:54,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:54,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943729555] [2020-07-21 23:50:54,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:54,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:50:54,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461197781] [2020-07-21 23:50:54,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:50:54,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:54,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:50:54,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:50:54,146 INFO L87 Difference]: Start difference. First operand 50226 states and 76627 transitions. Second operand 4 states. [2020-07-21 23:50:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:57,977 INFO L93 Difference]: Finished difference Result 107141 states and 163193 transitions. [2020-07-21 23:50:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:50:57,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 23:50:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:58,036 INFO L225 Difference]: With dead ends: 107141 [2020-07-21 23:50:58,037 INFO L226 Difference]: Without dead ends: 54023 [2020-07-21 23:50:58,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 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 23:50:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54023 states. [2020-07-21 23:51:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54023 to 54017. [2020-07-21 23:51:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54017 states. [2020-07-21 23:51:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54017 states to 54017 states and 81808 transitions. [2020-07-21 23:51:03,018 INFO L78 Accepts]: Start accepts. Automaton has 54017 states and 81808 transitions. Word has length 339 [2020-07-21 23:51:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:03,018 INFO L479 AbstractCegarLoop]: Abstraction has 54017 states and 81808 transitions. [2020-07-21 23:51:03,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 54017 states and 81808 transitions. [2020-07-21 23:51:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 23:51:03,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:03,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:03,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:03,249 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1897326802, now seen corresponding path program 1 times [2020-07-21 23:51:03,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:03,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586017835] [2020-07-21 23:51:03,251 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 23:51:03,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:51:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:03,811 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 23:51:03,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:03,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586017835] [2020-07-21 23:51:03,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:03,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:03,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120050309] [2020-07-21 23:51:03,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:03,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:03,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:03,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:03,814 INFO L87 Difference]: Start difference. First operand 54017 states and 81808 transitions. Second operand 4 states. [2020-07-21 23:51:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:10,768 INFO L93 Difference]: Finished difference Result 138860 states and 208961 transitions. [2020-07-21 23:51:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:10,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 23:51:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:10,864 INFO L225 Difference]: With dead ends: 138860 [2020-07-21 23:51:10,864 INFO L226 Difference]: Without dead ends: 96158 [2020-07-21 23:51:10,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96158 states. [2020-07-21 23:51:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96158 to 57651. [2020-07-21 23:51:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57651 states. [2020-07-21 23:51:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57651 states to 57651 states and 87465 transitions. [2020-07-21 23:51:16,730 INFO L78 Accepts]: Start accepts. Automaton has 57651 states and 87465 transitions. Word has length 340 [2020-07-21 23:51:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:16,730 INFO L479 AbstractCegarLoop]: Abstraction has 57651 states and 87465 transitions. [2020-07-21 23:51:16,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 57651 states and 87465 transitions. [2020-07-21 23:51:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 23:51:16,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:16,762 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] [2020-07-21 23:51:16,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:16,962 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1775562027, now seen corresponding path program 1 times [2020-07-21 23:51:16,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:16,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575847118] [2020-07-21 23:51:16,965 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 23:51:17,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:17,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:17,445 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 23:51:17,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:17,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575847118] [2020-07-21 23:51:17,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:17,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:17,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292432697] [2020-07-21 23:51:17,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:17,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:17,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:17,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:17,447 INFO L87 Difference]: Start difference. First operand 57651 states and 87465 transitions. Second operand 3 states. [2020-07-21 23:51:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:25,107 INFO L93 Difference]: Finished difference Result 157308 states and 237515 transitions. [2020-07-21 23:51:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:25,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 23:51:25,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:25,245 INFO L225 Difference]: With dead ends: 157308 [2020-07-21 23:51:25,245 INFO L226 Difference]: Without dead ends: 110298 [2020-07-21 23:51:25,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 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 23:51:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110298 states. [2020-07-21 23:51:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110298 to 110296. [2020-07-21 23:51:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110296 states. [2020-07-21 23:51:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110296 states to 110296 states and 166081 transitions. [2020-07-21 23:51:35,757 INFO L78 Accepts]: Start accepts. Automaton has 110296 states and 166081 transitions. Word has length 341 [2020-07-21 23:51:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:35,758 INFO L479 AbstractCegarLoop]: Abstraction has 110296 states and 166081 transitions. [2020-07-21 23:51:35,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 110296 states and 166081 transitions. [2020-07-21 23:51:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:51:35,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:35,830 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] [2020-07-21 23:51:36,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:36,031 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash 572764343, now seen corresponding path program 1 times [2020-07-21 23:51:36,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:36,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281013663] [2020-07-21 23:51:36,033 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 23:51:36,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:36,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:36,436 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 23:51:36,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:36,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281013663] [2020-07-21 23:51:36,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:36,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:36,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083301457] [2020-07-21 23:51:36,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:36,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:36,438 INFO L87 Difference]: Start difference. First operand 110296 states and 166081 transitions. Second operand 3 states. [2020-07-21 23:51:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:50,547 INFO L93 Difference]: Finished difference Result 277644 states and 414967 transitions. [2020-07-21 23:51:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:50,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 23:51:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:50,771 INFO L225 Difference]: With dead ends: 277644 [2020-07-21 23:51:50,772 INFO L226 Difference]: Without dead ends: 194066 [2020-07-21 23:51:50,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 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 23:51:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194066 states. [2020-07-21 23:52:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194066 to 111376. [2020-07-21 23:52:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111376 states. [2020-07-21 23:52:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111376 states to 111376 states and 167501 transitions. [2020-07-21 23:52:03,222 INFO L78 Accepts]: Start accepts. Automaton has 111376 states and 167501 transitions. Word has length 342 [2020-07-21 23:52:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:03,222 INFO L479 AbstractCegarLoop]: Abstraction has 111376 states and 167501 transitions. [2020-07-21 23:52:03,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 111376 states and 167501 transitions. [2020-07-21 23:52:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:52:03,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:03,289 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] [2020-07-21 23:52:03,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:03,490 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:03,491 INFO L82 PathProgramCache]: Analyzing trace with hash -465543073, now seen corresponding path program 1 times [2020-07-21 23:52:03,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:03,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999509397] [2020-07-21 23:52:03,492 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 23:52:03,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:03,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:52:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:03,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:03,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999509397] [2020-07-21 23:52:03,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:03,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:03,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180573012] [2020-07-21 23:52:03,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:03,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:03,872 INFO L87 Difference]: Start difference. First operand 111376 states and 167501 transitions. Second operand 4 states. [2020-07-21 23:52:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:15,484 INFO L93 Difference]: Finished difference Result 197073 states and 295844 transitions. [2020-07-21 23:52:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:15,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-21 23:52:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:15,644 INFO L225 Difference]: With dead ends: 197073 [2020-07-21 23:52:15,644 INFO L226 Difference]: Without dead ends: 157505 [2020-07-21 23:52:15,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 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 23:52:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157505 states. [2020-07-21 23:52:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157505 to 119017. [2020-07-21 23:52:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119017 states. [2020-07-21 23:52:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119017 states to 119017 states and 179222 transitions. [2020-07-21 23:52:28,251 INFO L78 Accepts]: Start accepts. Automaton has 119017 states and 179222 transitions. Word has length 342 [2020-07-21 23:52:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:28,251 INFO L479 AbstractCegarLoop]: Abstraction has 119017 states and 179222 transitions. [2020-07-21 23:52:28,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 119017 states and 179222 transitions. [2020-07-21 23:52:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:52:28,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:28,331 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] [2020-07-21 23:52:28,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:28,539 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1125984775, now seen corresponding path program 1 times [2020-07-21 23:52:28,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:28,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126912192] [2020-07-21 23:52:28,541 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 23:52:28,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:28,963 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 23:52:28,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:28,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126912192] [2020-07-21 23:52:28,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:28,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:28,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895709944] [2020-07-21 23:52:28,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:28,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:28,965 INFO L87 Difference]: Start difference. First operand 119017 states and 179222 transitions. Second operand 4 states. [2020-07-21 23:52:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:40,001 INFO L93 Difference]: Finished difference Result 261484 states and 389159 transitions. [2020-07-21 23:52:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:40,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-21 23:52:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:40,150 INFO L225 Difference]: With dead ends: 261484 [2020-07-21 23:52:40,150 INFO L226 Difference]: Without dead ends: 133933 [2020-07-21 23:52:40,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 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 23:52:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133933 states. [2020-07-21 23:52:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133933 to 133931. [2020-07-21 23:52:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133931 states. [2020-07-21 23:52:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133931 states to 133931 states and 197598 transitions. [2020-07-21 23:52:53,651 INFO L78 Accepts]: Start accepts. Automaton has 133931 states and 197598 transitions. Word has length 343 [2020-07-21 23:52:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:53,651 INFO L479 AbstractCegarLoop]: Abstraction has 133931 states and 197598 transitions. [2020-07-21 23:52:53,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 133931 states and 197598 transitions. [2020-07-21 23:52:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:52:53,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:53,735 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] [2020-07-21 23:52:53,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:53,936 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash 332815650, now seen corresponding path program 1 times [2020-07-21 23:52:53,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:53,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199446798] [2020-07-21 23:52:53,937 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 23:52:54,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:54,352 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 23:52:54,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:54,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199446798] [2020-07-21 23:52:54,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:54,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:54,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537582780] [2020-07-21 23:52:54,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:54,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:54,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:54,354 INFO L87 Difference]: Start difference. First operand 133931 states and 197598 transitions. Second operand 3 states. [2020-07-21 23:53:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:12,974 INFO L93 Difference]: Finished difference Result 351341 states and 517927 transitions. [2020-07-21 23:53:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:12,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 23:53:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:13,294 INFO L225 Difference]: With dead ends: 351341 [2020-07-21 23:53:13,295 INFO L226 Difference]: Without dead ends: 230235 [2020-07-21 23:53:13,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 23:53:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230235 states. [2020-07-21 23:53:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230235 to 129579. [2020-07-21 23:53:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129579 states. [2020-07-21 23:53:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129579 states to 129579 states and 191067 transitions. [2020-07-21 23:53:28,306 INFO L78 Accepts]: Start accepts. Automaton has 129579 states and 191067 transitions. Word has length 343 [2020-07-21 23:53:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:28,306 INFO L479 AbstractCegarLoop]: Abstraction has 129579 states and 191067 transitions. [2020-07-21 23:53:28,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 129579 states and 191067 transitions. [2020-07-21 23:53:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:53:28,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:28,395 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] [2020-07-21 23:53:28,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:28,751 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:28,752 INFO L82 PathProgramCache]: Analyzing trace with hash -481817221, now seen corresponding path program 1 times [2020-07-21 23:53:28,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:28,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627136957] [2020-07-21 23:53:28,752 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:29,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:29,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:29,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:29,172 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 23:53:29,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:29,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627136957] [2020-07-21 23:53:29,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:29,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:29,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717141158] [2020-07-21 23:53:29,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:29,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:29,175 INFO L87 Difference]: Start difference. First operand 129579 states and 191067 transitions. Second operand 3 states. [2020-07-21 23:53:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:51,157 INFO L93 Difference]: Finished difference Result 312449 states and 459918 transitions. [2020-07-21 23:53:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:51,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 23:53:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:51,459 INFO L225 Difference]: With dead ends: 312449 [2020-07-21 23:53:51,459 INFO L226 Difference]: Without dead ends: 220857 [2020-07-21 23:53:51,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 23:53:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220857 states. [2020-07-21 23:54:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220857 to 131539. [2020-07-21 23:54:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131539 states. [2020-07-21 23:54:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131539 states to 131539 states and 193649 transitions. [2020-07-21 23:54:03,133 INFO L78 Accepts]: Start accepts. Automaton has 131539 states and 193649 transitions. Word has length 343 [2020-07-21 23:54:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:03,133 INFO L479 AbstractCegarLoop]: Abstraction has 131539 states and 193649 transitions. [2020-07-21 23:54:03,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 131539 states and 193649 transitions. [2020-07-21 23:54:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 23:54:03,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:03,214 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] [2020-07-21 23:54:03,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:03,415 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash 276113738, now seen corresponding path program 1 times [2020-07-21 23:54:03,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:03,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766894538] [2020-07-21 23:54:03,417 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:03,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:03,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:54:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:03,838 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 23:54:03,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:03,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766894538] [2020-07-21 23:54:03,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:03,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:54:03,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614374086] [2020-07-21 23:54:03,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:54:03,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:03,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:54:03,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:54:03,840 INFO L87 Difference]: Start difference. First operand 131539 states and 193649 transitions. Second operand 4 states. [2020-07-21 23:54:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:19,611 INFO L93 Difference]: Finished difference Result 287581 states and 421597 transitions. [2020-07-21 23:54:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:54:19,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 23:54:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:19,780 INFO L225 Difference]: With dead ends: 287581 [2020-07-21 23:54:19,780 INFO L226 Difference]: Without dead ends: 138816 [2020-07-21 23:54:19,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 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 23:54:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138816 states. [2020-07-21 23:54:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138816 to 138814. [2020-07-21 23:54:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138814 states. [2020-07-21 23:54:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138814 states to 138814 states and 202614 transitions. [2020-07-21 23:54:31,741 INFO L78 Accepts]: Start accepts. Automaton has 138814 states and 202614 transitions. Word has length 344 [2020-07-21 23:54:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:31,742 INFO L479 AbstractCegarLoop]: Abstraction has 138814 states and 202614 transitions. [2020-07-21 23:54:31,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:54:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 138814 states and 202614 transitions. [2020-07-21 23:54:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 23:54:31,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:31,838 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] [2020-07-21 23:54:32,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:32,039 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1076892410, now seen corresponding path program 1 times [2020-07-21 23:54:32,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:32,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889492612] [2020-07-21 23:54:32,041 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:32,429 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:54:32,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:54:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:32,546 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 23:54:32,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:32,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889492612] [2020-07-21 23:54:32,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:32,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:54:32,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918076430] [2020-07-21 23:54:32,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:54:32,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:54:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:54:32,548 INFO L87 Difference]: Start difference. First operand 138814 states and 202614 transitions. Second operand 4 states. [2020-07-21 23:54:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:57,208 INFO L93 Difference]: Finished difference Result 391421 states and 569935 transitions. [2020-07-21 23:54:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:54:57,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 23:54:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:57,538 INFO L225 Difference]: With dead ends: 391421 [2020-07-21 23:54:57,538 INFO L226 Difference]: Without dead ends: 256069 [2020-07-21 23:54:57,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 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 23:54:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256069 states. [2020-07-21 23:55:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256069 to 256067. [2020-07-21 23:55:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256067 states. [2020-07-21 23:55:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256067 states to 256067 states and 370603 transitions. [2020-07-21 23:55:25,079 INFO L78 Accepts]: Start accepts. Automaton has 256067 states and 370603 transitions. Word has length 344 [2020-07-21 23:55:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:25,079 INFO L479 AbstractCegarLoop]: Abstraction has 256067 states and 370603 transitions. [2020-07-21 23:55:25,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:55:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 256067 states and 370603 transitions. [2020-07-21 23:55:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 23:55:25,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:25,279 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] [2020-07-21 23:55:25,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:25,480 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1852880630, now seen corresponding path program 1 times [2020-07-21 23:55:25,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:25,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843849171] [2020-07-21 23:55:25,482 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:25,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:55:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:25,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:55:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:25,960 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 23:55:25,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:25,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843849171] [2020-07-21 23:55:25,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:25,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:55:25,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511038965] [2020-07-21 23:55:25,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:55:25,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:55:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:55:25,962 INFO L87 Difference]: Start difference. First operand 256067 states and 370603 transitions. Second operand 3 states. [2020-07-21 23:56:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:13,917 INFO L93 Difference]: Finished difference Result 691835 states and 998204 transitions. [2020-07-21 23:56:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:13,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 23:56:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:14,636 INFO L225 Difference]: With dead ends: 691835 [2020-07-21 23:56:14,636 INFO L226 Difference]: Without dead ends: 485407 [2020-07-21 23:56:14,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 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 23:56:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485407 states. [2020-07-21 23:57:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485407 to 485405. [2020-07-21 23:57:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485405 states. [2020-07-21 23:57:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485405 states to 485405 states and 696622 transitions. [2020-07-21 23:57:05,299 INFO L78 Accepts]: Start accepts. Automaton has 485405 states and 696622 transitions. Word has length 346 [2020-07-21 23:57:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:05,300 INFO L479 AbstractCegarLoop]: Abstraction has 485405 states and 696622 transitions. [2020-07-21 23:57:05,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 485405 states and 696622 transitions. [2020-07-21 23:57:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 23:57:05,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:05,680 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] [2020-07-21 23:57:05,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:05,888 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1664677053, now seen corresponding path program 1 times [2020-07-21 23:57:05,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:05,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417647261] [2020-07-21 23:57:05,890 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:06,225 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:06,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:06,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:06,290 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 23:57:06,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:06,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417647261] [2020-07-21 23:57:06,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:06,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:06,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947704806] [2020-07-21 23:57:06,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:06,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:06,292 INFO L87 Difference]: Start difference. First operand 485405 states and 696622 transitions. Second operand 3 states. [2020-07-21 23:58:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:58:28,704 INFO L93 Difference]: Finished difference Result 1171190 states and 1681978 transitions. [2020-07-21 23:58:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:58:28,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-21 23:58:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:58:30,096 INFO L225 Difference]: With dead ends: 1171190 [2020-07-21 23:58:30,097 INFO L226 Difference]: Without dead ends: 828525 [2020-07-21 23:58:30,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 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 23:58:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828525 states. [2020-07-21 23:59:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828525 to 493249. [2020-07-21 23:59:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493249 states. [2020-07-21 23:59:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493249 states to 493249 states and 704314 transitions. [2020-07-21 23:59:43,154 INFO L78 Accepts]: Start accepts. Automaton has 493249 states and 704314 transitions. Word has length 347 [2020-07-21 23:59:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:43,155 INFO L479 AbstractCegarLoop]: Abstraction has 493249 states and 704314 transitions. [2020-07-21 23:59:43,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 493249 states and 704314 transitions. [2020-07-21 23:59:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 23:59:43,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:43,565 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] [2020-07-21 23:59:43,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:43,766 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1355375446, now seen corresponding path program 1 times [2020-07-21 23:59:43,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:43,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429328177] [2020-07-21 23:59:43,768 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:44,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:59:44,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:59:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:44,170 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 23:59:44,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:44,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429328177] [2020-07-21 23:59:44,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:44,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:44,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021302300] [2020-07-21 23:59:44,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:44,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:44,173 INFO L87 Difference]: Start difference. First operand 493249 states and 704314 transitions. Second operand 3 states. [2020-07-22 00:01:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:01:03,734 INFO L93 Difference]: Finished difference Result 998165 states and 1431307 transitions. [2020-07-22 00:01:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:01:03,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-07-22 00:01:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:01:04,876 INFO L225 Difference]: With dead ends: 998165 [2020-07-22 00:01:04,876 INFO L226 Difference]: Without dead ends: 723095 [2020-07-22 00:01:05,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:01:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723095 states.