/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:59:40,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:59:40,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:59:40,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:59:40,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:59:40,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:59:40,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:59:40,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:59:40,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:59:40,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:59:40,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:59:40,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:59:40,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:59:40,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:59:40,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:59:40,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:59:40,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:59:40,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:59:40,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:59:40,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:59:40,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:59:40,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:59:40,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:59:40,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:59:40,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:59:40,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:59:40,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:59:40,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:59:40,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:59:40,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 22:59:40,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 22:59:40,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 22:59:40,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 22:59:40,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 22:59:40,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 22:59:40,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 22:59:40,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 22:59:40,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 22:59:40,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:59:40,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:59:40,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:59:40,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:59:40,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:59:40,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:59:40,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:59:40,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:59:40,584 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:59:40,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:59:40,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:59:40,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:59:40,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:59:40,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:59:40,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:59:40,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:59:40,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:59:40,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:59:40,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:59:40,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:59:40,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:59:40,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:59:40,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:59:40,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:59:40,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:59:40,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:59:40,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:59:40,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:59:40,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:59:40,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:59:40,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:40,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:59:40,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:59:40,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:59:40,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:59:40,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:59:40,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:59:40,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:59:40,883 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:59:40,885 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 22:59:40,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ba977e0/1eaf631b677e4b6989a3f263bd8e1a00/FLAG2aa5f3cae [2020-07-20 22:59:41,745 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:59:41,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 22:59:41,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ba977e0/1eaf631b677e4b6989a3f263bd8e1a00/FLAG2aa5f3cae [2020-07-20 22:59:41,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ba977e0/1eaf631b677e4b6989a3f263bd8e1a00 [2020-07-20 22:59:41,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:59:41,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:59:41,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:59:41,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:59:41,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:59:41,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:59:41" (1/1) ... [2020-07-20 22:59:41,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8aaffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:41, skipping insertion in model container [2020-07-20 22:59:41,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:59:41" (1/1) ... [2020-07-20 22:59:41,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:59:42,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:59:43,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:59:43,625 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:59:44,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:59:44,882 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:59:44,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44 WrapperNode [2020-07-20 22:59:44,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:59:44,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:59:44,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:59:44,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:59:44,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:44,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:45,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:45,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:45,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... [2020-07-20 22:59:45,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:59:45,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:59:45,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:59:45,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:59:45,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:59:45,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:59:45,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:59:45,252 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:59:45,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:59:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:59:45,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 22:59:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 22:59:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 22:59:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 22:59:45,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:59:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:59:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 22:59:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 22:59:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 22:59:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 22:59:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 22:59:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 22:59:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 22:59:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 22:59:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 22:59:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:59:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:59:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:59:49,192 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:59:49,193 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 22:59:49,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:59:49 BoogieIcfgContainer [2020-07-20 22:59:49,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:59:49,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:59:49,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:59:49,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:59:49,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:59:41" (1/3) ... [2020-07-20 22:59:49,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb06790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:59:49, skipping insertion in model container [2020-07-20 22:59:49,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:59:44" (2/3) ... [2020-07-20 22:59:49,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb06790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:59:49, skipping insertion in model container [2020-07-20 22:59:49,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:59:49" (3/3) ... [2020-07-20 22:59:49,229 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 22:59:49,243 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:59:49,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 22:59:49,284 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 22:59:49,330 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:59:49,330 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:59:49,330 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:59:49,330 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:59:49,330 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:59:49,330 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:59:49,331 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:59:49,331 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:59:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-20 22:59:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 22:59:49,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:49,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:49,491 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-20 22:59:49,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:49,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24357660] [2020-07-20 22:59:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:50,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:59:50,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:59:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:59:50,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:50,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24357660] [2020-07-20 22:59:50,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:50,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:59:50,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054253915] [2020-07-20 22:59:50,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:59:50,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:59:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:59:50,693 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-20 22:59:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:51,260 INFO L93 Difference]: Finished difference Result 4120 states and 7457 transitions. [2020-07-20 22:59:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:59:51,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 22:59:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:51,296 INFO L225 Difference]: With dead ends: 4120 [2020-07-20 22:59:51,297 INFO L226 Difference]: Without dead ends: 2738 [2020-07-20 22:59:51,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:59:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2020-07-20 22:59:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2707. [2020-07-20 22:59:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2707 states. [2020-07-20 22:59:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 4430 transitions. [2020-07-20 22:59:51,538 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 4430 transitions. Word has length 473 [2020-07-20 22:59:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:51,540 INFO L479 AbstractCegarLoop]: Abstraction has 2707 states and 4430 transitions. [2020-07-20 22:59:51,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:59:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 4430 transitions. [2020-07-20 22:59:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 22:59:51,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:51,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:51,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:51,771 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:51,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1002795308, now seen corresponding path program 1 times [2020-07-20 22:59:51,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:51,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325911171] [2020-07-20 22:59:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:52,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:59:52,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1796 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:52,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:59:52,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:52,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325911171] [2020-07-20 22:59:52,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:52,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:52,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922927771] [2020-07-20 22:59:52,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:52,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:52,495 INFO L87 Difference]: Start difference. First operand 2707 states and 4430 transitions. Second operand 3 states. [2020-07-20 22:59:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:52,835 INFO L93 Difference]: Finished difference Result 7870 states and 12849 transitions. [2020-07-20 22:59:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:52,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-20 22:59:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:52,868 INFO L225 Difference]: With dead ends: 7870 [2020-07-20 22:59:52,868 INFO L226 Difference]: Without dead ends: 5326 [2020-07-20 22:59:52,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2020-07-20 22:59:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5297. [2020-07-20 22:59:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5297 states. [2020-07-20 22:59:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 8642 transitions. [2020-07-20 22:59:53,114 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 8642 transitions. Word has length 475 [2020-07-20 22:59:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:53,116 INFO L479 AbstractCegarLoop]: Abstraction has 5297 states and 8642 transitions. [2020-07-20 22:59:53,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 8642 transitions. [2020-07-20 22:59:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 22:59:53,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:53,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:53,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:53,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2020364490, now seen corresponding path program 1 times [2020-07-20 22:59:53,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:53,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035061336] [2020-07-20 22:59:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:53,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:59:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:59:53,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:53,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035061336] [2020-07-20 22:59:53,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:53,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:53,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806466080] [2020-07-20 22:59:53,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:53,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:53,915 INFO L87 Difference]: Start difference. First operand 5297 states and 8642 transitions. Second operand 3 states. [2020-07-20 22:59:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:54,373 INFO L93 Difference]: Finished difference Result 15724 states and 25627 transitions. [2020-07-20 22:59:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:54,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-20 22:59:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:54,427 INFO L225 Difference]: With dead ends: 15724 [2020-07-20 22:59:54,428 INFO L226 Difference]: Without dead ends: 10451 [2020-07-20 22:59:54,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10451 states. [2020-07-20 22:59:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10451 to 5322. [2020-07-20 22:59:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5322 states. [2020-07-20 22:59:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 8680 transitions. [2020-07-20 22:59:54,818 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 8680 transitions. Word has length 476 [2020-07-20 22:59:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:54,818 INFO L479 AbstractCegarLoop]: Abstraction has 5322 states and 8680 transitions. [2020-07-20 22:59:54,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 8680 transitions. [2020-07-20 22:59:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 22:59:54,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:54,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:55,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:55,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:55,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1604778927, now seen corresponding path program 1 times [2020-07-20 22:59:55,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:55,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120776464] [2020-07-20 22:59:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:55,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:59:55,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:59:55,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:59:55,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:55,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120776464] [2020-07-20 22:59:55,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:55,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:59:55,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632522613] [2020-07-20 22:59:55,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:59:55,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:59:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:59:55,679 INFO L87 Difference]: Start difference. First operand 5322 states and 8680 transitions. Second operand 4 states. [2020-07-20 22:59:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:56,270 INFO L93 Difference]: Finished difference Result 12684 states and 20885 transitions. [2020-07-20 22:59:56,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:59:56,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 22:59:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:56,323 INFO L225 Difference]: With dead ends: 12684 [2020-07-20 22:59:56,324 INFO L226 Difference]: Without dead ends: 6414 [2020-07-20 22:59:56,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:59:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2020-07-20 22:59:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 6385. [2020-07-20 22:59:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6385 states. [2020-07-20 22:59:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 10481 transitions. [2020-07-20 22:59:56,666 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 10481 transitions. Word has length 477 [2020-07-20 22:59:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:56,666 INFO L479 AbstractCegarLoop]: Abstraction has 6385 states and 10481 transitions. [2020-07-20 22:59:56,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:59:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 10481 transitions. [2020-07-20 22:59:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 22:59:56,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:56,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:56,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:56,911 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:56,912 INFO L82 PathProgramCache]: Analyzing trace with hash 775272611, now seen corresponding path program 1 times [2020-07-20 22:59:56,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:56,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195862698] [2020-07-20 22:59:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:57,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:59:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:57,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:59:58,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:58,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195862698] [2020-07-20 22:59:58,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:58,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:58,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740891568] [2020-07-20 22:59:58,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:58,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:58,282 INFO L87 Difference]: Start difference. First operand 6385 states and 10481 transitions. Second operand 3 states. [2020-07-20 22:59:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:58,729 INFO L93 Difference]: Finished difference Result 18516 states and 30320 transitions. [2020-07-20 22:59:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:58,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-20 22:59:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:58,762 INFO L225 Difference]: With dead ends: 18516 [2020-07-20 22:59:58,762 INFO L226 Difference]: Without dead ends: 12662 [2020-07-20 22:59:58,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2020-07-20 22:59:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 12552. [2020-07-20 22:59:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12552 states. [2020-07-20 22:59:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12552 states to 12552 states and 20532 transitions. [2020-07-20 22:59:59,261 INFO L78 Accepts]: Start accepts. Automaton has 12552 states and 20532 transitions. Word has length 478 [2020-07-20 22:59:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:59,262 INFO L479 AbstractCegarLoop]: Abstraction has 12552 states and 20532 transitions. [2020-07-20 22:59:59,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 12552 states and 20532 transitions. [2020-07-20 22:59:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 22:59:59,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:59,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:59,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:59,549 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1715357784, now seen corresponding path program 1 times [2020-07-20 22:59:59,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:59,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850191237] [2020-07-20 22:59:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:59,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:59:59,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:59:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:00,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:00,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850191237] [2020-07-20 23:00:00,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:00,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:00,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676296698] [2020-07-20 23:00:00,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:00,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:00,034 INFO L87 Difference]: Start difference. First operand 12552 states and 20532 transitions. Second operand 3 states. [2020-07-20 23:00:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:00,736 INFO L93 Difference]: Finished difference Result 37319 states and 61008 transitions. [2020-07-20 23:00:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:00,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-20 23:00:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:00,805 INFO L225 Difference]: With dead ends: 37319 [2020-07-20 23:00:00,805 INFO L226 Difference]: Without dead ends: 24904 [2020-07-20 23:00:00,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24904 states. [2020-07-20 23:00:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24904 to 12624. [2020-07-20 23:00:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12624 states. [2020-07-20 23:00:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12624 states to 12624 states and 20630 transitions. [2020-07-20 23:00:01,396 INFO L78 Accepts]: Start accepts. Automaton has 12624 states and 20630 transitions. Word has length 479 [2020-07-20 23:00:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:01,397 INFO L479 AbstractCegarLoop]: Abstraction has 12624 states and 20630 transitions. [2020-07-20 23:00:01,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12624 states and 20630 transitions. [2020-07-20 23:00:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 23:00:01,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:01,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:01,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:01,639 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:01,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1642694422, now seen corresponding path program 1 times [2020-07-20 23:00:01,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:01,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749578474] [2020-07-20 23:00:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:02,023 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:02,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:02,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749578474] [2020-07-20 23:00:02,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:02,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:02,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970278341] [2020-07-20 23:00:02,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:02,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:02,230 INFO L87 Difference]: Start difference. First operand 12624 states and 20630 transitions. Second operand 3 states. [2020-07-20 23:00:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:02,683 INFO L93 Difference]: Finished difference Result 37136 states and 60654 transitions. [2020-07-20 23:00:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:02,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-20 23:00:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:02,776 INFO L225 Difference]: With dead ends: 37136 [2020-07-20 23:00:02,777 INFO L226 Difference]: Without dead ends: 24886 [2020-07-20 23:00:02,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24886 states. [2020-07-20 23:00:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24886 to 12776. [2020-07-20 23:00:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12776 states. [2020-07-20 23:00:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12776 states to 12776 states and 20854 transitions. [2020-07-20 23:00:03,487 INFO L78 Accepts]: Start accepts. Automaton has 12776 states and 20854 transitions. Word has length 480 [2020-07-20 23:00:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:03,488 INFO L479 AbstractCegarLoop]: Abstraction has 12776 states and 20854 transitions. [2020-07-20 23:00:03,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 12776 states and 20854 transitions. [2020-07-20 23:00:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 23:00:03,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:03,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:03,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:03,755 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 692263589, now seen corresponding path program 1 times [2020-07-20 23:00:03,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:03,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400055053] [2020-07-20 23:00:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:04,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:04,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:04,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:04,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400055053] [2020-07-20 23:00:04,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:04,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:04,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730297536] [2020-07-20 23:00:04,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:04,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:04,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:04,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:04,370 INFO L87 Difference]: Start difference. First operand 12776 states and 20854 transitions. Second operand 3 states. [2020-07-20 23:00:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:05,015 INFO L93 Difference]: Finished difference Result 38076 states and 62164 transitions. [2020-07-20 23:00:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-20 23:00:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:05,068 INFO L225 Difference]: With dead ends: 38076 [2020-07-20 23:00:05,068 INFO L226 Difference]: Without dead ends: 25434 [2020-07-20 23:00:05,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2020-07-20 23:00:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 12878. [2020-07-20 23:00:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12878 states. [2020-07-20 23:00:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12878 states to 12878 states and 20997 transitions. [2020-07-20 23:00:05,711 INFO L78 Accepts]: Start accepts. Automaton has 12878 states and 20997 transitions. Word has length 480 [2020-07-20 23:00:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:05,712 INFO L479 AbstractCegarLoop]: Abstraction has 12878 states and 20997 transitions. [2020-07-20 23:00:05,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 12878 states and 20997 transitions. [2020-07-20 23:00:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 23:00:05,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:05,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:05,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:05,950 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1683258483, now seen corresponding path program 1 times [2020-07-20 23:00:05,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:05,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164318068] [2020-07-20 23:00:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:06,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:00:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:06,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:06,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:06,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164318068] [2020-07-20 23:00:06,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:06,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:06,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076867665] [2020-07-20 23:00:06,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:06,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:06,719 INFO L87 Difference]: Start difference. First operand 12878 states and 20997 transitions. Second operand 3 states. [2020-07-20 23:00:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:08,342 INFO L93 Difference]: Finished difference Result 36391 states and 59211 transitions. [2020-07-20 23:00:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:08,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 23:00:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:08,387 INFO L225 Difference]: With dead ends: 36391 [2020-07-20 23:00:08,387 INFO L226 Difference]: Without dead ends: 25047 [2020-07-20 23:00:08,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25047 states. [2020-07-20 23:00:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25047 to 25020. [2020-07-20 23:00:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25020 states. [2020-07-20 23:00:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25020 states to 25020 states and 40670 transitions. [2020-07-20 23:00:09,260 INFO L78 Accepts]: Start accepts. Automaton has 25020 states and 40670 transitions. Word has length 481 [2020-07-20 23:00:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:09,260 INFO L479 AbstractCegarLoop]: Abstraction has 25020 states and 40670 transitions. [2020-07-20 23:00:09,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 25020 states and 40670 transitions. [2020-07-20 23:00:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 23:00:09,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:09,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:09,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:09,637 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:09,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2037709606, now seen corresponding path program 1 times [2020-07-20 23:00:09,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:09,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296892185] [2020-07-20 23:00:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:09,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:00:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:09,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:10,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:10,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296892185] [2020-07-20 23:00:10,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:10,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:10,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860645207] [2020-07-20 23:00:10,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:10,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:10,145 INFO L87 Difference]: Start difference. First operand 25020 states and 40670 transitions. Second operand 3 states. [2020-07-20 23:00:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:11,608 INFO L93 Difference]: Finished difference Result 73524 states and 119482 transitions. [2020-07-20 23:00:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:11,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-20 23:00:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:11,676 INFO L225 Difference]: With dead ends: 73524 [2020-07-20 23:00:11,676 INFO L226 Difference]: Without dead ends: 49272 [2020-07-20 23:00:11,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49272 states. [2020-07-20 23:00:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49272 to 25424. [2020-07-20 23:00:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25424 states. [2020-07-20 23:00:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25424 states to 25424 states and 41220 transitions. [2020-07-20 23:00:12,668 INFO L78 Accepts]: Start accepts. Automaton has 25424 states and 41220 transitions. Word has length 482 [2020-07-20 23:00:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:12,669 INFO L479 AbstractCegarLoop]: Abstraction has 25424 states and 41220 transitions. [2020-07-20 23:00:12,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 25424 states and 41220 transitions. [2020-07-20 23:00:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 23:00:12,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:12,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:12,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:12,915 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash 917289402, now seen corresponding path program 1 times [2020-07-20 23:00:12,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:12,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63443023] [2020-07-20 23:00:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:13,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:13,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:13,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63443023] [2020-07-20 23:00:13,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:13,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:13,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130736985] [2020-07-20 23:00:13,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:13,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:13,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:13,521 INFO L87 Difference]: Start difference. First operand 25424 states and 41220 transitions. Second operand 3 states. [2020-07-20 23:00:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:14,820 INFO L93 Difference]: Finished difference Result 73774 states and 119470 transitions. [2020-07-20 23:00:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:14,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-20 23:00:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:14,878 INFO L225 Difference]: With dead ends: 73774 [2020-07-20 23:00:14,878 INFO L226 Difference]: Without dead ends: 48524 [2020-07-20 23:00:14,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48524 states. [2020-07-20 23:00:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48524 to 25345. [2020-07-20 23:00:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25345 states. [2020-07-20 23:00:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25345 states to 25345 states and 41081 transitions. [2020-07-20 23:00:16,862 INFO L78 Accepts]: Start accepts. Automaton has 25345 states and 41081 transitions. Word has length 482 [2020-07-20 23:00:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:16,862 INFO L479 AbstractCegarLoop]: Abstraction has 25345 states and 41081 transitions. [2020-07-20 23:00:16,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25345 states and 41081 transitions. [2020-07-20 23:00:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 23:00:16,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:16,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:17,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:17,105 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash 70098175, now seen corresponding path program 1 times [2020-07-20 23:00:17,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:17,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462154275] [2020-07-20 23:00:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:17,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:00:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:17,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:17,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462154275] [2020-07-20 23:00:17,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:17,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:00:17,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422267638] [2020-07-20 23:00:17,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:00:17,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:00:17,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:00:17,600 INFO L87 Difference]: Start difference. First operand 25345 states and 41081 transitions. Second operand 4 states. [2020-07-20 23:00:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:19,111 INFO L93 Difference]: Finished difference Result 61460 states and 100513 transitions. [2020-07-20 23:00:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:00:19,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-20 23:00:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:19,143 INFO L225 Difference]: With dead ends: 61460 [2020-07-20 23:00:19,143 INFO L226 Difference]: Without dead ends: 31650 [2020-07-20 23:00:19,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:00:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31650 states. [2020-07-20 23:00:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31650 to 31458. [2020-07-20 23:00:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31458 states. [2020-07-20 23:00:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31458 states to 31458 states and 51116 transitions. [2020-07-20 23:00:20,640 INFO L78 Accepts]: Start accepts. Automaton has 31458 states and 51116 transitions. Word has length 483 [2020-07-20 23:00:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:20,640 INFO L479 AbstractCegarLoop]: Abstraction has 31458 states and 51116 transitions. [2020-07-20 23:00:20,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:00:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 31458 states and 51116 transitions. [2020-07-20 23:00:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 23:00:20,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:20,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:20,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:20,872 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash -5673666, now seen corresponding path program 1 times [2020-07-20 23:00:20,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:20,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772616366] [2020-07-20 23:00:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:21,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:21,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:21,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772616366] [2020-07-20 23:00:21,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:21,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:21,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315671332] [2020-07-20 23:00:21,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:21,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:21,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:21,350 INFO L87 Difference]: Start difference. First operand 31458 states and 51116 transitions. Second operand 3 states. [2020-07-20 23:00:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:24,441 INFO L93 Difference]: Finished difference Result 92463 states and 150327 transitions. [2020-07-20 23:00:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:24,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-20 23:00:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:24,518 INFO L225 Difference]: With dead ends: 92463 [2020-07-20 23:00:24,518 INFO L226 Difference]: Without dead ends: 61743 [2020-07-20 23:00:24,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61743 states. [2020-07-20 23:00:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61743 to 32265. [2020-07-20 23:00:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32265 states. [2020-07-20 23:00:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32265 states to 32265 states and 52201 transitions. [2020-07-20 23:00:25,936 INFO L78 Accepts]: Start accepts. Automaton has 32265 states and 52201 transitions. Word has length 484 [2020-07-20 23:00:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:25,937 INFO L479 AbstractCegarLoop]: Abstraction has 32265 states and 52201 transitions. [2020-07-20 23:00:25,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 32265 states and 52201 transitions. [2020-07-20 23:00:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 23:00:25,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:25,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:26,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:26,169 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash -602748171, now seen corresponding path program 1 times [2020-07-20 23:00:26,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:26,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620600653] [2020-07-20 23:00:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:26,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:00:26,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:00:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:26,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:26,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620600653] [2020-07-20 23:00:26,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:26,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:00:26,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044104130] [2020-07-20 23:00:26,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:00:26,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:26,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:00:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:00:26,894 INFO L87 Difference]: Start difference. First operand 32265 states and 52201 transitions. Second operand 4 states. [2020-07-20 23:00:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:29,847 INFO L93 Difference]: Finished difference Result 89016 states and 143924 transitions. [2020-07-20 23:00:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:00:29,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 23:00:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:29,918 INFO L225 Difference]: With dead ends: 89016 [2020-07-20 23:00:29,918 INFO L226 Difference]: Without dead ends: 62544 [2020-07-20 23:00:29,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:00:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62544 states. [2020-07-20 23:00:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62544 to 36792. [2020-07-20 23:00:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36792 states. [2020-07-20 23:00:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36792 states to 36792 states and 59730 transitions. [2020-07-20 23:00:31,788 INFO L78 Accepts]: Start accepts. Automaton has 36792 states and 59730 transitions. Word has length 484 [2020-07-20 23:00:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:31,788 INFO L479 AbstractCegarLoop]: Abstraction has 36792 states and 59730 transitions. [2020-07-20 23:00:31,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:00:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36792 states and 59730 transitions. [2020-07-20 23:00:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 23:00:31,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:31,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:32,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:32,023 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1400290867, now seen corresponding path program 1 times [2020-07-20 23:00:32,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:32,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725215821] [2020-07-20 23:00:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:32,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:00:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:32,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:00:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:32,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:32,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725215821] [2020-07-20 23:00:32,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:32,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:00:32,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839117702] [2020-07-20 23:00:32,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:00:32,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:00:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:00:32,631 INFO L87 Difference]: Start difference. First operand 36792 states and 59730 transitions. Second operand 4 states. [2020-07-20 23:00:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:35,634 INFO L93 Difference]: Finished difference Result 100879 states and 164504 transitions. [2020-07-20 23:00:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:00:35,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 23:00:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:35,721 INFO L225 Difference]: With dead ends: 100879 [2020-07-20 23:00:35,721 INFO L226 Difference]: Without dead ends: 68038 [2020-07-20 23:00:35,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:00:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68038 states. [2020-07-20 23:00:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68038 to 67918. [2020-07-20 23:00:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67918 states. [2020-07-20 23:00:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67918 states to 67918 states and 110085 transitions. [2020-07-20 23:00:40,188 INFO L78 Accepts]: Start accepts. Automaton has 67918 states and 110085 transitions. Word has length 485 [2020-07-20 23:00:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:40,188 INFO L479 AbstractCegarLoop]: Abstraction has 67918 states and 110085 transitions. [2020-07-20 23:00:40,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:00:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67918 states and 110085 transitions. [2020-07-20 23:00:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 23:00:40,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:40,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:40,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:40,450 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1457658508, now seen corresponding path program 1 times [2020-07-20 23:00:40,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:40,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427432429] [2020-07-20 23:00:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:40,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:00:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1812 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:00:40,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:41,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:41,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427432429] [2020-07-20 23:00:41,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:41,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:00:41,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704478726] [2020-07-20 23:00:41,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:00:41,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:00:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:41,138 INFO L87 Difference]: Start difference. First operand 67918 states and 110085 transitions. Second operand 3 states. [2020-07-20 23:00:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:48,623 INFO L93 Difference]: Finished difference Result 186131 states and 301659 transitions. [2020-07-20 23:00:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:00:48,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-20 23:00:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:48,752 INFO L225 Difference]: With dead ends: 186131 [2020-07-20 23:00:48,752 INFO L226 Difference]: Without dead ends: 128431 [2020-07-20 23:00:48,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:00:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128431 states. [2020-07-20 23:00:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128431 to 128239. [2020-07-20 23:00:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128239 states. [2020-07-20 23:00:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128239 states to 128239 states and 207178 transitions. [2020-07-20 23:00:54,693 INFO L78 Accepts]: Start accepts. Automaton has 128239 states and 207178 transitions. Word has length 485 [2020-07-20 23:00:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:54,693 INFO L479 AbstractCegarLoop]: Abstraction has 128239 states and 207178 transitions. [2020-07-20 23:00:54,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 128239 states and 207178 transitions. [2020-07-20 23:00:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 23:00:54,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:54,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:55,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:55,010 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1921735643, now seen corresponding path program 1 times [2020-07-20 23:00:55,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:55,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351344039] [2020-07-20 23:00:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:55,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:00:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 23:00:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:00:55,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:55,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351344039] [2020-07-20 23:00:55,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:55,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:00:55,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405206974] [2020-07-20 23:00:55,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:00:55,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:00:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:00:55,944 INFO L87 Difference]: Start difference. First operand 128239 states and 207178 transitions. Second operand 4 states. [2020-07-20 23:01:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:01:06,892 INFO L93 Difference]: Finished difference Result 313063 states and 510581 transitions. [2020-07-20 23:01:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:01:06,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-20 23:01:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:01:07,150 INFO L225 Difference]: With dead ends: 313063 [2020-07-20 23:01:07,151 INFO L226 Difference]: Without dead ends: 169348 [2020-07-20 23:01:07,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:01:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169348 states. [2020-07-20 23:01:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169348 to 169321. [2020-07-20 23:01:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169321 states. [2020-07-20 23:01:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169321 states to 169321 states and 275292 transitions. [2020-07-20 23:01:20,069 INFO L78 Accepts]: Start accepts. Automaton has 169321 states and 275292 transitions. Word has length 486 [2020-07-20 23:01:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:01:20,069 INFO L479 AbstractCegarLoop]: Abstraction has 169321 states and 275292 transitions. [2020-07-20 23:01:20,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:01:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 169321 states and 275292 transitions. [2020-07-20 23:01:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 23:01:20,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:01:20,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:01:20,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:20,455 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:01:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:01:20,456 INFO L82 PathProgramCache]: Analyzing trace with hash 26232972, now seen corresponding path program 1 times [2020-07-20 23:01:20,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:01:20,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514676062] [2020-07-20 23:01:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:20,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:01:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:01:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:01:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:01:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:01:21,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:01:21,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514676062] [2020-07-20 23:01:21,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:01:21,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:01:21,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924996781] [2020-07-20 23:01:21,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:01:21,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:01:21,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:01:21,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:01:21,043 INFO L87 Difference]: Start difference. First operand 169321 states and 275292 transitions. Second operand 3 states. [2020-07-20 23:01:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:01:39,307 INFO L93 Difference]: Finished difference Result 482696 states and 785263 transitions. [2020-07-20 23:01:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:01:39,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-20 23:01:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:01:39,782 INFO L225 Difference]: With dead ends: 482696 [2020-07-20 23:01:39,783 INFO L226 Difference]: Without dead ends: 330390 [2020-07-20 23:01:39,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:01:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330390 states. [2020-07-20 23:02:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330390 to 330286. [2020-07-20 23:02:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330286 states. [2020-07-20 23:02:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330286 states to 330286 states and 535148 transitions. [2020-07-20 23:02:07,766 INFO L78 Accepts]: Start accepts. Automaton has 330286 states and 535148 transitions. Word has length 487 [2020-07-20 23:02:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:02:07,767 INFO L479 AbstractCegarLoop]: Abstraction has 330286 states and 535148 transitions. [2020-07-20 23:02:07,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:02:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 330286 states and 535148 transitions. [2020-07-20 23:02:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 23:02:08,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:08,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:02:08,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:08,338 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:08,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1767375213, now seen corresponding path program 1 times [2020-07-20 23:02:08,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:08,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011278] [2020-07-20 23:02:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:08,662 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:02:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:02:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:02:08,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:08,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011278] [2020-07-20 23:02:08,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:08,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:02:08,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625052543] [2020-07-20 23:02:08,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:02:08,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:02:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:02:08,778 INFO L87 Difference]: Start difference. First operand 330286 states and 535148 transitions. Second operand 3 states. [2020-07-20 23:02:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:02:45,501 INFO L93 Difference]: Finished difference Result 865940 states and 1391005 transitions. [2020-07-20 23:02:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:02:45,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-20 23:02:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:02:46,326 INFO L225 Difference]: With dead ends: 865940 [2020-07-20 23:02:46,326 INFO L226 Difference]: Without dead ends: 598494 [2020-07-20 23:02:46,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:02:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598494 states. [2020-07-20 23:03:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598494 to 342702. [2020-07-20 23:03:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342702 states. [2020-07-20 23:03:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342702 states to 342702 states and 553095 transitions. [2020-07-20 23:03:16,936 INFO L78 Accepts]: Start accepts. Automaton has 342702 states and 553095 transitions. Word has length 487 [2020-07-20 23:03:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:16,936 INFO L479 AbstractCegarLoop]: Abstraction has 342702 states and 553095 transitions. [2020-07-20 23:03:16,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 342702 states and 553095 transitions. [2020-07-20 23:03:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 23:03:17,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:17,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:03:17,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:17,543 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:17,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1867108872, now seen corresponding path program 1 times [2020-07-20 23:03:17,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:17,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710543442] [2020-07-20 23:03:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:17,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:03:17,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:03:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:03:18,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:18,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710543442] [2020-07-20 23:03:18,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:18,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:18,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433580490] [2020-07-20 23:03:18,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:18,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:18,548 INFO L87 Difference]: Start difference. First operand 342702 states and 553095 transitions. Second operand 4 states. [2020-07-20 23:04:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:06,804 INFO L93 Difference]: Finished difference Result 947938 states and 1524787 transitions. [2020-07-20 23:04:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:06,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-20 23:04:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:07,791 INFO L225 Difference]: With dead ends: 947938 [2020-07-20 23:04:07,791 INFO L226 Difference]: Without dead ends: 666478 [2020-07-20 23:04:08,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666478 states. [2020-07-20 23:04:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666478 to 409822. [2020-07-20 23:04:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409822 states. [2020-07-20 23:04:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409822 states to 409822 states and 662047 transitions. [2020-07-20 23:04:41,166 INFO L78 Accepts]: Start accepts. Automaton has 409822 states and 662047 transitions. Word has length 487 [2020-07-20 23:04:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:41,167 INFO L479 AbstractCegarLoop]: Abstraction has 409822 states and 662047 transitions. [2020-07-20 23:04:41,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 409822 states and 662047 transitions. [2020-07-20 23:04:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 23:04:41,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:41,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:41,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:41,843 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:41,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1653951966, now seen corresponding path program 1 times [2020-07-20 23:04:41,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:41,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899397063] [2020-07-20 23:04:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:42,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:42,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:43,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:43,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899397063] [2020-07-20 23:04:43,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:43,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:43,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543916200] [2020-07-20 23:04:43,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:43,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:43,176 INFO L87 Difference]: Start difference. First operand 409822 states and 662047 transitions. Second operand 4 states. [2020-07-20 23:05:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:30,210 INFO L93 Difference]: Finished difference Result 1031117 states and 1666367 transitions. [2020-07-20 23:05:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:30,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 23:05:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:30,996 INFO L225 Difference]: With dead ends: 1031117 [2020-07-20 23:05:30,996 INFO L226 Difference]: Without dead ends: 532051 [2020-07-20 23:05:31,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532051 states. [2020-07-20 23:06:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532051 to 531779. [2020-07-20 23:06:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531779 states. [2020-07-20 23:06:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531779 states to 531779 states and 855267 transitions. [2020-07-20 23:06:23,404 INFO L78 Accepts]: Start accepts. Automaton has 531779 states and 855267 transitions. Word has length 488 [2020-07-20 23:06:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:23,404 INFO L479 AbstractCegarLoop]: Abstraction has 531779 states and 855267 transitions. [2020-07-20 23:06:23,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:06:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 531779 states and 855267 transitions. [2020-07-20 23:06:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 23:06:25,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:25,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:25,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:25,988 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1660621295, now seen corresponding path program 1 times [2020-07-20 23:06:25,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:25,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530303772] [2020-07-20 23:06:25,990 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 [2020-07-20 23:06:26,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:06:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:06:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:26,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:26,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530303772] [2020-07-20 23:06:26,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:26,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:06:26,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027710337] [2020-07-20 23:06:26,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:06:26,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:06:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:06:26,483 INFO L87 Difference]: Start difference. First operand 531779 states and 855267 transitions. Second operand 4 states. [2020-07-20 23:07:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:07:28,982 INFO L93 Difference]: Finished difference Result 1372687 states and 2218760 transitions. [2020-07-20 23:07:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:07:28,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-20 23:07:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:07:30,264 INFO L225 Difference]: With dead ends: 1372687 [2020-07-20 23:07:30,264 INFO L226 Difference]: Without dead ends: 705675 [2020-07-20 23:07:30,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:07:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705675 states. [2020-07-20 23:08:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705675 to 705571. [2020-07-20 23:08:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705571 states. [2020-07-20 23:08:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705571 states to 705571 states and 1135567 transitions. [2020-07-20 23:08:37,687 INFO L78 Accepts]: Start accepts. Automaton has 705571 states and 1135567 transitions. Word has length 489 [2020-07-20 23:08:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:37,688 INFO L479 AbstractCegarLoop]: Abstraction has 705571 states and 1135567 transitions. [2020-07-20 23:08:37,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 705571 states and 1135567 transitions. [2020-07-20 23:08:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 23:08:38,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:38,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:08:38,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:38,903 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1942170431, now seen corresponding path program 1 times [2020-07-20 23:08:38,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:38,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461558105] [2020-07-20 23:08:38,904 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 [2020-07-20 23:08:40,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:40,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 23:08:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:08:40,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:40,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461558105] [2020-07-20 23:08:40,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:40,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:40,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597270970] [2020-07-20 23:08:40,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:40,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:40,215 INFO L87 Difference]: Start difference. First operand 705571 states and 1135567 transitions. Second operand 4 states. [2020-07-20 23:10:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:04,132 INFO L93 Difference]: Finished difference Result 1776928 states and 2856767 transitions. [2020-07-20 23:10:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:10:04,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 23:10:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:06,113 INFO L225 Difference]: With dead ends: 1776928 [2020-07-20 23:10:06,113 INFO L226 Difference]: Without dead ends: 1083073 [2020-07-20 23:10:06,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:10:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083073 states.