/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:56:42,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:56:42,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:56:42,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:56:42,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:56:42,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:56:42,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:56:42,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:56:42,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:56:42,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:56:42,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:56:42,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:56:42,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:56:42,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:56:42,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:56:42,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:56:42,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:56:42,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:56:42,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:56:42,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:56:42,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:56:42,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:56:42,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:56:42,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:56:42,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:56:42,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:56:42,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:56:42,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:56:42,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:56:42,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:56:42,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:56:42,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:56:42,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:56:42,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:56:42,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:56:42,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:56:42,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:56:42,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:56:42,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:56:42,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:56:42,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:56:42,782 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:56:42,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:56:42,782 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:56:42,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:56:42,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:56:42,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:56:42,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:56:42,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:56:42,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:56:42,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:56:42,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:56:42,784 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:56:42,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:56:42,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:56:42,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:56:42,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:56:42,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:56:42,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:56:42,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:56:42,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:56:42,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:56:42,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:56:42,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:42,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:56:42,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:56:42,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:56:43,076 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:56:43,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:56:43,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:56:43,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:56:43,094 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:56:43,095 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 23:56:43,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaab6898a/09be72bd1dd642329d1c20bf45d2645e/FLAG2ba6ea237 [2020-07-21 23:56:43,866 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:56:43,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 23:56:43,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaab6898a/09be72bd1dd642329d1c20bf45d2645e/FLAG2ba6ea237 [2020-07-21 23:56:44,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaab6898a/09be72bd1dd642329d1c20bf45d2645e [2020-07-21 23:56:44,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:56:44,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:56:44,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:56:44,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:56:44,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:56:44,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:56:44" (1/1) ... [2020-07-21 23:56:44,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234a323e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:44, skipping insertion in model container [2020-07-21 23:56:44,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:56:44" (1/1) ... [2020-07-21 23:56:44,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:56:44,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:56:45,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:56:45,752 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:56:47,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:56:47,140 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:56:47,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47 WrapperNode [2020-07-21 23:56:47,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:56:47,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:56:47,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:56:47,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:56:47,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... [2020-07-21 23:56:47,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:56:47,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:56:47,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:56:47,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:56:47,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:56:47,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:56:47,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:56:47,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:56:47,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:56:47,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:56:47,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:56:47,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:56:47,428 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:56:47,428 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:56:47,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:56:47,429 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:56:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:56:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:56:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:56:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:56:47,431 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:56:47,432 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 23:56:47,432 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:56:47,432 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:56:47,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:56:47,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:56:47,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:56:51,743 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:56:51,743 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:56:51,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:56:51 BoogieIcfgContainer [2020-07-21 23:56:51,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:56:51,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:56:51,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:56:51,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:56:51,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:56:44" (1/3) ... [2020-07-21 23:56:51,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270b44be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:56:51, skipping insertion in model container [2020-07-21 23:56:51,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:56:47" (2/3) ... [2020-07-21 23:56:51,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270b44be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:56:51, skipping insertion in model container [2020-07-21 23:56:51,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:56:51" (3/3) ... [2020-07-21 23:56:51,762 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 23:56:51,773 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:56:51,782 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:56:51,795 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:56:51,822 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:56:51,822 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:56:51,822 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:56:51,822 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:56:51,823 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:56:51,823 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:56:51,823 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:56:51,823 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:56:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-21 23:56:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 23:56:51,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:51,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:51,912 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:51,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-21 23:56:51,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:51,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575985182] [2020-07-21 23:56:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:52,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:56:52,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:56:52,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:56:53,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:53,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575985182] [2020-07-21 23:56:53,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:53,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:56:53,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835091917] [2020-07-21 23:56:53,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:56:53,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:53,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:56:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:56:53,230 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 4 states. [2020-07-21 23:56:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:53,748 INFO L93 Difference]: Finished difference Result 4174 states and 7515 transitions. [2020-07-21 23:56:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:56:53,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 23:56:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:53,784 INFO L225 Difference]: With dead ends: 4174 [2020-07-21 23:56:53,784 INFO L226 Difference]: Without dead ends: 2808 [2020-07-21 23:56:53,794 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 [2020-07-21 23:56:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2020-07-21 23:56:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2806. [2020-07-21 23:56:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2020-07-21 23:56:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4627 transitions. [2020-07-21 23:56:54,010 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4627 transitions. Word has length 487 [2020-07-21 23:56:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:54,015 INFO L479 AbstractCegarLoop]: Abstraction has 2806 states and 4627 transitions. [2020-07-21 23:56:54,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:56:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4627 transitions. [2020-07-21 23:56:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 23:56:54,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:54,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:54,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:54,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -541571176, now seen corresponding path program 1 times [2020-07-21 23:56:54,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:54,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928660788] [2020-07-21 23:56:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:54,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:56:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:56:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:56:55,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:55,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928660788] [2020-07-21 23:56:55,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:55,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:56:55,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196660139] [2020-07-21 23:56:55,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:56:55,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:56:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:55,122 INFO L87 Difference]: Start difference. First operand 2806 states and 4627 transitions. Second operand 3 states. [2020-07-21 23:56:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:55,454 INFO L93 Difference]: Finished difference Result 8011 states and 13147 transitions. [2020-07-21 23:56:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:55,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 23:56:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:55,483 INFO L225 Difference]: With dead ends: 8011 [2020-07-21 23:56:55,484 INFO L226 Difference]: Without dead ends: 5409 [2020-07-21 23:56:55,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2020-07-21 23:56:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5407. [2020-07-21 23:56:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5407 states. [2020-07-21 23:56:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 8859 transitions. [2020-07-21 23:56:55,857 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 8859 transitions. Word has length 489 [2020-07-21 23:56:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:55,864 INFO L479 AbstractCegarLoop]: Abstraction has 5407 states and 8859 transitions. [2020-07-21 23:56:55,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:56:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 8859 transitions. [2020-07-21 23:56:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 23:56:55,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:55,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:56,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:56,106 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1040804292, now seen corresponding path program 1 times [2020-07-21 23:56:56,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:56,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746846843] [2020-07-21 23:56:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:56,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:56:56,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:56:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:56:56,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:56,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746846843] [2020-07-21 23:56:56,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:56,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:56:56,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15659503] [2020-07-21 23:56:56,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:56:56,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:56,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:56:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:56,775 INFO L87 Difference]: Start difference. First operand 5407 states and 8859 transitions. Second operand 3 states. [2020-07-21 23:56:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:57,103 INFO L93 Difference]: Finished difference Result 15865 states and 25927 transitions. [2020-07-21 23:56:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:57,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 23:56:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:57,153 INFO L225 Difference]: With dead ends: 15865 [2020-07-21 23:56:57,154 INFO L226 Difference]: Without dead ends: 10612 [2020-07-21 23:56:57,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10612 states. [2020-07-21 23:56:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10612 to 5435. [2020-07-21 23:56:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5435 states. [2020-07-21 23:56:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 8899 transitions. [2020-07-21 23:56:57,427 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 8899 transitions. Word has length 490 [2020-07-21 23:56:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:57,428 INFO L479 AbstractCegarLoop]: Abstraction has 5435 states and 8899 transitions. [2020-07-21 23:56:57,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:56:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 8899 transitions. [2020-07-21 23:56:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 23:56:57,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:57,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:57,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:57,656 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -147211395, now seen corresponding path program 1 times [2020-07-21 23:56:57,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:57,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503679390] [2020-07-21 23:56:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:58,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:56:58,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:56:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:56:58,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:58,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503679390] [2020-07-21 23:56:58,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:58,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:56:58,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170913097] [2020-07-21 23:56:58,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:56:58,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:58,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:56:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:56:58,301 INFO L87 Difference]: Start difference. First operand 5435 states and 8899 transitions. Second operand 4 states. [2020-07-21 23:56:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:58,833 INFO L93 Difference]: Finished difference Result 11932 states and 19648 transitions. [2020-07-21 23:56:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:56:58,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 23:56:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:58,872 INFO L225 Difference]: With dead ends: 11932 [2020-07-21 23:56:58,873 INFO L226 Difference]: Without dead ends: 6526 [2020-07-21 23:56:58,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:56:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2020-07-21 23:56:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 5592. [2020-07-21 23:56:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5592 states. [2020-07-21 23:56:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 9176 transitions. [2020-07-21 23:56:59,201 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 9176 transitions. Word has length 491 [2020-07-21 23:56:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:59,202 INFO L479 AbstractCegarLoop]: Abstraction has 5592 states and 9176 transitions. [2020-07-21 23:56:59,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:56:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 9176 transitions. [2020-07-21 23:56:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 23:56:59,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:59,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:59,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:59,431 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1430418946, now seen corresponding path program 1 times [2020-07-21 23:56:59,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:59,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103608782] [2020-07-21 23:56:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:59,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:56:59,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:56:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:00,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:00,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103608782] [2020-07-21 23:57:00,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:00,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:00,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800283702] [2020-07-21 23:57:00,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:00,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:00,485 INFO L87 Difference]: Start difference. First operand 5592 states and 9176 transitions. Second operand 3 states. [2020-07-21 23:57:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:00,810 INFO L93 Difference]: Finished difference Result 16679 states and 27360 transitions. [2020-07-21 23:57:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:00,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 23:57:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:00,837 INFO L225 Difference]: With dead ends: 16679 [2020-07-21 23:57:00,837 INFO L226 Difference]: Without dead ends: 11139 [2020-07-21 23:57:00,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11139 states. [2020-07-21 23:57:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11139 to 5639. [2020-07-21 23:57:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5639 states. [2020-07-21 23:57:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5639 states to 5639 states and 9250 transitions. [2020-07-21 23:57:01,178 INFO L78 Accepts]: Start accepts. Automaton has 5639 states and 9250 transitions. Word has length 494 [2020-07-21 23:57:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:01,178 INFO L479 AbstractCegarLoop]: Abstraction has 5639 states and 9250 transitions. [2020-07-21 23:57:01,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5639 states and 9250 transitions. [2020-07-21 23:57:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:57:01,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:01,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:01,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:01,410 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:01,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1759779998, now seen corresponding path program 1 times [2020-07-21 23:57:01,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:01,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731438213] [2020-07-21 23:57:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:02,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:02,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:02,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731438213] [2020-07-21 23:57:02,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:02,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:02,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045801248] [2020-07-21 23:57:02,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:02,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:02,449 INFO L87 Difference]: Start difference. First operand 5639 states and 9250 transitions. Second operand 3 states. [2020-07-21 23:57:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:02,864 INFO L93 Difference]: Finished difference Result 16309 states and 26698 transitions. [2020-07-21 23:57:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:02,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:57:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:02,898 INFO L225 Difference]: With dead ends: 16309 [2020-07-21 23:57:02,899 INFO L226 Difference]: Without dead ends: 11024 [2020-07-21 23:57:02,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2020-07-21 23:57:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 11022. [2020-07-21 23:57:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11022 states. [2020-07-21 23:57:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11022 states to 11022 states and 18001 transitions. [2020-07-21 23:57:03,506 INFO L78 Accepts]: Start accepts. Automaton has 11022 states and 18001 transitions. Word has length 495 [2020-07-21 23:57:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:03,507 INFO L479 AbstractCegarLoop]: Abstraction has 11022 states and 18001 transitions. [2020-07-21 23:57:03,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 11022 states and 18001 transitions. [2020-07-21 23:57:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:57:03,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:03,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:03,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:03,748 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:03,748 INFO L82 PathProgramCache]: Analyzing trace with hash -702313640, now seen corresponding path program 1 times [2020-07-21 23:57:03,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:03,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406265515] [2020-07-21 23:57:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:04,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:04,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:04,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:04,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406265515] [2020-07-21 23:57:04,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:04,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:04,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387002020] [2020-07-21 23:57:04,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:04,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:04,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:04,287 INFO L87 Difference]: Start difference. First operand 11022 states and 18001 transitions. Second operand 3 states. [2020-07-21 23:57:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:04,953 INFO L93 Difference]: Finished difference Result 32810 states and 53558 transitions. [2020-07-21 23:57:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:04,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:57:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:05,007 INFO L225 Difference]: With dead ends: 32810 [2020-07-21 23:57:05,007 INFO L226 Difference]: Without dead ends: 21932 [2020-07-21 23:57:05,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2020-07-21 23:57:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 11120. [2020-07-21 23:57:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11120 states. [2020-07-21 23:57:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11120 states to 11120 states and 18152 transitions. [2020-07-21 23:57:05,495 INFO L78 Accepts]: Start accepts. Automaton has 11120 states and 18152 transitions. Word has length 495 [2020-07-21 23:57:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:05,495 INFO L479 AbstractCegarLoop]: Abstraction has 11120 states and 18152 transitions. [2020-07-21 23:57:05,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 11120 states and 18152 transitions. [2020-07-21 23:57:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:57:05,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:05,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:05,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:05,730 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:05,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:05,731 INFO L82 PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times [2020-07-21 23:57:05,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:05,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528888698] [2020-07-21 23:57:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:06,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:06,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:06,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:06,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528888698] [2020-07-21 23:57:06,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:06,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:06,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787153280] [2020-07-21 23:57:06,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:06,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:06,498 INFO L87 Difference]: Start difference. First operand 11120 states and 18152 transitions. Second operand 3 states. [2020-07-21 23:57:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:07,046 INFO L93 Difference]: Finished difference Result 20528 states and 33134 transitions. [2020-07-21 23:57:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:07,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:57:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:07,078 INFO L225 Difference]: With dead ends: 20528 [2020-07-21 23:57:07,078 INFO L226 Difference]: Without dead ends: 14314 [2020-07-21 23:57:07,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14314 states. [2020-07-21 23:57:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14314 to 12672. [2020-07-21 23:57:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12672 states. [2020-07-21 23:57:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12672 states to 12672 states and 20720 transitions. [2020-07-21 23:57:07,614 INFO L78 Accepts]: Start accepts. Automaton has 12672 states and 20720 transitions. Word has length 495 [2020-07-21 23:57:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:07,614 INFO L479 AbstractCegarLoop]: Abstraction has 12672 states and 20720 transitions. [2020-07-21 23:57:07,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 12672 states and 20720 transitions. [2020-07-21 23:57:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:57:07,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:07,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:07,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:07,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1859894242, now seen corresponding path program 1 times [2020-07-21 23:57:07,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:07,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068514114] [2020-07-21 23:57:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:08,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:08,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:08,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:08,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068514114] [2020-07-21 23:57:08,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:08,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:08,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665732298] [2020-07-21 23:57:08,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:08,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:08,925 INFO L87 Difference]: Start difference. First operand 12672 states and 20720 transitions. Second operand 3 states. [2020-07-21 23:57:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:09,423 INFO L93 Difference]: Finished difference Result 25928 states and 42042 transitions. [2020-07-21 23:57:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:09,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:57:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:09,453 INFO L225 Difference]: With dead ends: 25928 [2020-07-21 23:57:09,453 INFO L226 Difference]: Without dead ends: 17754 [2020-07-21 23:57:09,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17754 states. [2020-07-21 23:57:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17754 to 15472. [2020-07-21 23:57:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15472 states. [2020-07-21 23:57:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15472 states to 15472 states and 25376 transitions. [2020-07-21 23:57:10,032 INFO L78 Accepts]: Start accepts. Automaton has 15472 states and 25376 transitions. Word has length 495 [2020-07-21 23:57:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:10,033 INFO L479 AbstractCegarLoop]: Abstraction has 15472 states and 25376 transitions. [2020-07-21 23:57:10,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 15472 states and 25376 transitions. [2020-07-21 23:57:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 23:57:10,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:10,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:10,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:10,266 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:10,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1215950956, now seen corresponding path program 1 times [2020-07-21 23:57:10,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:10,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509041016] [2020-07-21 23:57:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:10,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:10,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:10,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:10,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:10,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509041016] [2020-07-21 23:57:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:10,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501321899] [2020-07-21 23:57:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:10,983 INFO L87 Difference]: Start difference. First operand 15472 states and 25376 transitions. Second operand 3 states. [2020-07-21 23:57:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:11,711 INFO L93 Difference]: Finished difference Result 46001 states and 75411 transitions. [2020-07-21 23:57:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:11,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 23:57:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:11,753 INFO L225 Difference]: With dead ends: 46001 [2020-07-21 23:57:11,753 INFO L226 Difference]: Without dead ends: 30753 [2020-07-21 23:57:11,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30753 states. [2020-07-21 23:57:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30753 to 15589. [2020-07-21 23:57:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15589 states. [2020-07-21 23:57:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15589 states to 15589 states and 25522 transitions. [2020-07-21 23:57:12,530 INFO L78 Accepts]: Start accepts. Automaton has 15589 states and 25522 transitions. Word has length 496 [2020-07-21 23:57:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:12,530 INFO L479 AbstractCegarLoop]: Abstraction has 15589 states and 25522 transitions. [2020-07-21 23:57:12,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 15589 states and 25522 transitions. [2020-07-21 23:57:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 23:57:12,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:12,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:12,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:12,752 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1122412706, now seen corresponding path program 1 times [2020-07-21 23:57:12,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:12,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452395223] [2020-07-21 23:57:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:13,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:13,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:13,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:13,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452395223] [2020-07-21 23:57:13,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:13,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:13,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332711163] [2020-07-21 23:57:13,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:13,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:13,326 INFO L87 Difference]: Start difference. First operand 15589 states and 25522 transitions. Second operand 3 states. [2020-07-21 23:57:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:14,288 INFO L93 Difference]: Finished difference Result 45223 states and 74011 transitions. [2020-07-21 23:57:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:14,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 23:57:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:14,321 INFO L225 Difference]: With dead ends: 45223 [2020-07-21 23:57:14,322 INFO L226 Difference]: Without dead ends: 30399 [2020-07-21 23:57:14,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30399 states. [2020-07-21 23:57:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30399 to 15741. [2020-07-21 23:57:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15741 states. [2020-07-21 23:57:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15741 states to 15741 states and 25746 transitions. [2020-07-21 23:57:14,973 INFO L78 Accepts]: Start accepts. Automaton has 15741 states and 25746 transitions. Word has length 497 [2020-07-21 23:57:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:14,974 INFO L479 AbstractCegarLoop]: Abstraction has 15741 states and 25746 transitions. [2020-07-21 23:57:14,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 15741 states and 25746 transitions. [2020-07-21 23:57:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:57:14,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:14,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:15,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:15,199 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:15,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1053014495, now seen corresponding path program 1 times [2020-07-21 23:57:15,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:15,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514819851] [2020-07-21 23:57:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:15,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:15,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:15,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:15,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514819851] [2020-07-21 23:57:15,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:15,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:15,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570189120] [2020-07-21 23:57:15,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:15,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:15,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:15,808 INFO L87 Difference]: Start difference. First operand 15741 states and 25746 transitions. Second operand 3 states. [2020-07-21 23:57:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:16,761 INFO L93 Difference]: Finished difference Result 45480 states and 74368 transitions. [2020-07-21 23:57:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:16,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 23:57:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:16,793 INFO L225 Difference]: With dead ends: 45480 [2020-07-21 23:57:16,794 INFO L226 Difference]: Without dead ends: 30638 [2020-07-21 23:57:16,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30638 states. [2020-07-21 23:57:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30638 to 15980. [2020-07-21 23:57:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15980 states. [2020-07-21 23:57:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15980 states to 15980 states and 26058 transitions. [2020-07-21 23:57:17,481 INFO L78 Accepts]: Start accepts. Automaton has 15980 states and 26058 transitions. Word has length 498 [2020-07-21 23:57:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:17,481 INFO L479 AbstractCegarLoop]: Abstraction has 15980 states and 26058 transitions. [2020-07-21 23:57:17,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 15980 states and 26058 transitions. [2020-07-21 23:57:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:57:17,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:17,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:17,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:17,694 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:17,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1989014165, now seen corresponding path program 1 times [2020-07-21 23:57:17,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:17,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085555243] [2020-07-21 23:57:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:18,229 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:18,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:57:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:18,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:18,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085555243] [2020-07-21 23:57:18,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:18,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:57:18,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19855682] [2020-07-21 23:57:18,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:57:18,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:57:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:57:18,853 INFO L87 Difference]: Start difference. First operand 15980 states and 26058 transitions. Second operand 5 states. [2020-07-21 23:57:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:20,239 INFO L93 Difference]: Finished difference Result 26562 states and 43123 transitions. [2020-07-21 23:57:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:57:20,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-07-21 23:57:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:20,257 INFO L225 Difference]: With dead ends: 26562 [2020-07-21 23:57:20,258 INFO L226 Difference]: Without dead ends: 15980 [2020-07-21 23:57:20,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:57:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15980 states. [2020-07-21 23:57:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15980 to 15980. [2020-07-21 23:57:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15980 states. [2020-07-21 23:57:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15980 states to 15980 states and 25918 transitions. [2020-07-21 23:57:20,881 INFO L78 Accepts]: Start accepts. Automaton has 15980 states and 25918 transitions. Word has length 498 [2020-07-21 23:57:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:20,881 INFO L479 AbstractCegarLoop]: Abstraction has 15980 states and 25918 transitions. [2020-07-21 23:57:20,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:57:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 15980 states and 25918 transitions. [2020-07-21 23:57:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:57:20,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:20,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:21,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:21,093 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash -860169328, now seen corresponding path program 1 times [2020-07-21 23:57:21,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:21,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778740147] [2020-07-21 23:57:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:21,616 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:57:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:22,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:22,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778740147] [2020-07-21 23:57:22,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:22,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:57:22,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130520832] [2020-07-21 23:57:22,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:57:22,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:57:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:57:22,396 INFO L87 Difference]: Start difference. First operand 15980 states and 25918 transitions. Second operand 4 states. [2020-07-21 23:57:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:23,714 INFO L93 Difference]: Finished difference Result 46975 states and 76244 transitions. [2020-07-21 23:57:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:57:23,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 23:57:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:23,748 INFO L225 Difference]: With dead ends: 46975 [2020-07-21 23:57:23,749 INFO L226 Difference]: Without dead ends: 31310 [2020-07-21 23:57:23,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:57:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31310 states. [2020-07-21 23:57:25,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31310 to 31234. [2020-07-21 23:57:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31234 states. [2020-07-21 23:57:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31234 states to 31234 states and 50496 transitions. [2020-07-21 23:57:25,269 INFO L78 Accepts]: Start accepts. Automaton has 31234 states and 50496 transitions. Word has length 498 [2020-07-21 23:57:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:25,270 INFO L479 AbstractCegarLoop]: Abstraction has 31234 states and 50496 transitions. [2020-07-21 23:57:25,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:57:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 31234 states and 50496 transitions. [2020-07-21 23:57:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 23:57:25,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:25,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:25,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:25,495 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash -369762384, now seen corresponding path program 1 times [2020-07-21 23:57:25,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:25,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253166364] [2020-07-21 23:57:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:26,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:26,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:26,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:26,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253166364] [2020-07-21 23:57:26,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:26,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:26,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86264243] [2020-07-21 23:57:26,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:26,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:26,221 INFO L87 Difference]: Start difference. First operand 31234 states and 50496 transitions. Second operand 3 states. [2020-07-21 23:57:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:28,788 INFO L93 Difference]: Finished difference Result 88638 states and 143244 transitions. [2020-07-21 23:57:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:28,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 23:57:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:28,851 INFO L225 Difference]: With dead ends: 88638 [2020-07-21 23:57:28,851 INFO L226 Difference]: Without dead ends: 60208 [2020-07-21 23:57:28,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60208 states. [2020-07-21 23:57:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60208 to 60170. [2020-07-21 23:57:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60170 states. [2020-07-21 23:57:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60170 states to 60170 states and 96928 transitions. [2020-07-21 23:57:32,768 INFO L78 Accepts]: Start accepts. Automaton has 60170 states and 96928 transitions. Word has length 500 [2020-07-21 23:57:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:32,768 INFO L479 AbstractCegarLoop]: Abstraction has 60170 states and 96928 transitions. [2020-07-21 23:57:32,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 60170 states and 96928 transitions. [2020-07-21 23:57:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 23:57:32,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:32,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:33,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:33,021 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1995492592, now seen corresponding path program 1 times [2020-07-21 23:57:33,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:33,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054829723] [2020-07-21 23:57:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:33,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:57:33,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:33,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:33,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054829723] [2020-07-21 23:57:33,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:33,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:57:33,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135472201] [2020-07-21 23:57:33,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:57:33,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:57:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:57:33,628 INFO L87 Difference]: Start difference. First operand 60170 states and 96928 transitions. Second operand 4 states. [2020-07-21 23:57:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:39,143 INFO L93 Difference]: Finished difference Result 170498 states and 274284 transitions. [2020-07-21 23:57:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:57:39,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-21 23:57:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:39,258 INFO L225 Difference]: With dead ends: 170498 [2020-07-21 23:57:39,259 INFO L226 Difference]: Without dead ends: 115424 [2020-07-21 23:57:39,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:57:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115424 states. [2020-07-21 23:57:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115424 to 64240. [2020-07-21 23:57:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64240 states. [2020-07-21 23:57:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64240 states to 64240 states and 103785 transitions. [2020-07-21 23:57:44,403 INFO L78 Accepts]: Start accepts. Automaton has 64240 states and 103785 transitions. Word has length 501 [2020-07-21 23:57:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:44,403 INFO L479 AbstractCegarLoop]: Abstraction has 64240 states and 103785 transitions. [2020-07-21 23:57:44,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:57:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 64240 states and 103785 transitions. [2020-07-21 23:57:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 23:57:44,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:44,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:44,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:44,882 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1777082226, now seen corresponding path program 1 times [2020-07-21 23:57:44,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:44,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493534645] [2020-07-21 23:57:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:45,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:45,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:45,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:45,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493534645] [2020-07-21 23:57:45,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:45,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:45,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703046229] [2020-07-21 23:57:45,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:45,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:45,589 INFO L87 Difference]: Start difference. First operand 64240 states and 103785 transitions. Second operand 3 states. [2020-07-21 23:57:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:52,841 INFO L93 Difference]: Finished difference Result 186208 states and 301098 transitions. [2020-07-21 23:57:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:52,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 23:57:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:52,984 INFO L225 Difference]: With dead ends: 186208 [2020-07-21 23:57:52,984 INFO L226 Difference]: Without dead ends: 125889 [2020-07-21 23:57:53,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125889 states. [2020-07-21 23:57:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125889 to 125887. [2020-07-21 23:57:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125887 states. [2020-07-21 23:57:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125887 states to 125887 states and 202844 transitions. [2020-07-21 23:57:59,262 INFO L78 Accepts]: Start accepts. Automaton has 125887 states and 202844 transitions. Word has length 501 [2020-07-21 23:57:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:59,263 INFO L479 AbstractCegarLoop]: Abstraction has 125887 states and 202844 transitions. [2020-07-21 23:57:59,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 125887 states and 202844 transitions. [2020-07-21 23:57:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 23:57:59,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:59,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:59,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:59,531 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash -342290349, now seen corresponding path program 1 times [2020-07-21 23:57:59,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:59,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793582259] [2020-07-21 23:57:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:00,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:58:00,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:58:00,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:58:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:58:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:58:00,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:58:00,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793582259] [2020-07-21 23:58:00,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:58:00,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:58:00,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951243806] [2020-07-21 23:58:00,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:58:00,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:58:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:58:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:58:00,504 INFO L87 Difference]: Start difference. First operand 125887 states and 202844 transitions. Second operand 3 states. [2020-07-21 23:58:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:58:13,874 INFO L93 Difference]: Finished difference Result 375686 states and 605239 transitions. [2020-07-21 23:58:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:58:13,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 23:58:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:58:14,135 INFO L225 Difference]: With dead ends: 375686 [2020-07-21 23:58:14,135 INFO L226 Difference]: Without dead ends: 250242 [2020-07-21 23:58:14,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:58:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250242 states. [2020-07-21 23:58:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250242 to 125808. [2020-07-21 23:58:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125808 states. [2020-07-21 23:58:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125808 states to 125808 states and 202697 transitions. [2020-07-21 23:58:25,639 INFO L78 Accepts]: Start accepts. Automaton has 125808 states and 202697 transitions. Word has length 501 [2020-07-21 23:58:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:58:25,639 INFO L479 AbstractCegarLoop]: Abstraction has 125808 states and 202697 transitions. [2020-07-21 23:58:25,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:58:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 125808 states and 202697 transitions. [2020-07-21 23:58:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 23:58:25,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:58:25,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:58:25,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:25,912 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:58:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:58:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2090726380, now seen corresponding path program 1 times [2020-07-21 23:58:25,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:58:25,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881740445] [2020-07-21 23:58:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:26,350 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:58:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:58:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:58:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:58:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:58:26,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:58:26,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881740445] [2020-07-21 23:58:26,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:58:26,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:58:26,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162614533] [2020-07-21 23:58:26,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:58:26,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:58:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:58:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:58:26,498 INFO L87 Difference]: Start difference. First operand 125808 states and 202697 transitions. Second operand 3 states. [2020-07-21 23:58:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:58:39,700 INFO L93 Difference]: Finished difference Result 374471 states and 603429 transitions. [2020-07-21 23:58:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:58:39,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 23:58:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:58:39,975 INFO L225 Difference]: With dead ends: 374471 [2020-07-21 23:58:39,975 INFO L226 Difference]: Without dead ends: 249154 [2020-07-21 23:58:40,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:58:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249154 states. [2020-07-21 23:58:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249154 to 125735. [2020-07-21 23:58:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125735 states. [2020-07-21 23:58:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125735 states to 125735 states and 202563 transitions. [2020-07-21 23:58:51,336 INFO L78 Accepts]: Start accepts. Automaton has 125735 states and 202563 transitions. Word has length 502 [2020-07-21 23:58:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:58:51,337 INFO L479 AbstractCegarLoop]: Abstraction has 125735 states and 202563 transitions. [2020-07-21 23:58:51,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:58:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 125735 states and 202563 transitions. [2020-07-21 23:58:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 23:58:51,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:58:51,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:58:51,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:51,613 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:58:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:58:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1409119127, now seen corresponding path program 1 times [2020-07-21 23:58:51,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:58:51,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557494088] [2020-07-21 23:58:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:52,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:58:52,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:58:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:58:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:58:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:58:52,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:58:52,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557494088] [2020-07-21 23:58:52,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:58:52,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:58:52,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786604851] [2020-07-21 23:58:52,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:58:52,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:58:52,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:58:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:58:52,630 INFO L87 Difference]: Start difference. First operand 125735 states and 202563 transitions. Second operand 4 states. [2020-07-21 23:59:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:02,174 INFO L93 Difference]: Finished difference Result 284723 states and 461181 transitions. [2020-07-21 23:59:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:59:02,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-07-21 23:59:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:02,331 INFO L225 Difference]: With dead ends: 284723 [2020-07-21 23:59:02,331 INFO L226 Difference]: Without dead ends: 143540 [2020-07-21 23:59:02,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:59:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143540 states. [2020-07-21 23:59:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143540 to 142538. [2020-07-21 23:59:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142538 states. [2020-07-21 23:59:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142538 states to 142538 states and 230192 transitions. [2020-07-21 23:59:13,857 INFO L78 Accepts]: Start accepts. Automaton has 142538 states and 230192 transitions. Word has length 503 [2020-07-21 23:59:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:13,858 INFO L479 AbstractCegarLoop]: Abstraction has 142538 states and 230192 transitions. [2020-07-21 23:59:13,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:59:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 142538 states and 230192 transitions. [2020-07-21 23:59:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 23:59:13,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:13,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:59:14,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:14,163 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1985135797, now seen corresponding path program 1 times [2020-07-21 23:59:14,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:14,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810035013] [2020-07-21 23:59:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:14,618 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:59:14,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:59:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:59:15,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:15,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810035013] [2020-07-21 23:59:15,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:15,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:59:15,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32125369] [2020-07-21 23:59:15,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:59:15,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:59:15,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:59:15,188 INFO L87 Difference]: Start difference. First operand 142538 states and 230192 transitions. Second operand 4 states. [2020-07-21 23:59:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:28,858 INFO L93 Difference]: Finished difference Result 325736 states and 528296 transitions. [2020-07-21 23:59:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:59:28,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 23:59:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:29,066 INFO L225 Difference]: With dead ends: 325736 [2020-07-21 23:59:29,066 INFO L226 Difference]: Without dead ends: 168795 [2020-07-21 23:59:29,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:59:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168795 states. [2020-07-21 23:59:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168795 to 168793. [2020-07-21 23:59:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168793 states. [2020-07-21 23:59:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168793 states to 168793 states and 273253 transitions. [2020-07-21 23:59:39,553 INFO L78 Accepts]: Start accepts. Automaton has 168793 states and 273253 transitions. Word has length 505 [2020-07-21 23:59:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:39,554 INFO L479 AbstractCegarLoop]: Abstraction has 168793 states and 273253 transitions. [2020-07-21 23:59:39,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:59:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 168793 states and 273253 transitions. [2020-07-21 23:59:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 23:59:39,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:39,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:59:39,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:39,876 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash 535812841, now seen corresponding path program 1 times [2020-07-21 23:59:39,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:39,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660990752] [2020-07-21 23:59:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:40,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:59:40,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:59:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:59:40,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:40,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660990752] [2020-07-21 23:59:40,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:40,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:40,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793967016] [2020-07-21 23:59:40,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:40,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:40,587 INFO L87 Difference]: Start difference. First operand 168793 states and 273253 transitions. Second operand 3 states. [2020-07-21 23:59:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:56,497 INFO L93 Difference]: Finished difference Result 309165 states and 496279 transitions. [2020-07-21 23:59:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:59:56,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 23:59:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:56,779 INFO L225 Difference]: With dead ends: 309165 [2020-07-21 23:59:56,779 INFO L226 Difference]: Without dead ends: 224731 [2020-07-21 23:59:56,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224731 states. [2020-07-22 00:00:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224731 to 208217. [2020-07-22 00:00:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208217 states. [2020-07-22 00:00:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208217 states to 208217 states and 337285 transitions. [2020-07-22 00:00:11,431 INFO L78 Accepts]: Start accepts. Automaton has 208217 states and 337285 transitions. Word has length 506 [2020-07-22 00:00:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:00:11,432 INFO L479 AbstractCegarLoop]: Abstraction has 208217 states and 337285 transitions. [2020-07-22 00:00:11,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:00:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 208217 states and 337285 transitions. [2020-07-22 00:00:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-22 00:00:11,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:00:11,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:00:11,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:11,761 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:00:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:00:11,762 INFO L82 PathProgramCache]: Analyzing trace with hash 145568779, now seen corresponding path program 1 times [2020-07-22 00:00:11,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:00:11,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614707030] [2020-07-22 00:00:11,763 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 [2020-07-22 00:00:12,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:00:12,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:00:12,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:00:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:00:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:00:12,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:00:12,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614707030] [2020-07-22 00:00:12,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:00:12,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:00:12,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106992162] [2020-07-22 00:00:12,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:00:12,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:00:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:00:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:00:12,385 INFO L87 Difference]: Start difference. First operand 208217 states and 337285 transitions. Second operand 3 states. [2020-07-22 00:00:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:32,918 INFO L93 Difference]: Finished difference Result 414013 states and 670247 transitions. [2020-07-22 00:00:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:00:32,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-22 00:00:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:33,285 INFO L225 Difference]: With dead ends: 414013 [2020-07-22 00:00:33,285 INFO L226 Difference]: Without dead ends: 294875 [2020-07-22 00:00:33,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:00:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294875 states. [2020-07-22 00:00:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294875 to 279449. [2020-07-22 00:00:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279449 states. [2020-07-22 00:00:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279449 states to 279449 states and 452261 transitions. [2020-07-22 00:00:56,613 INFO L78 Accepts]: Start accepts. Automaton has 279449 states and 452261 transitions. Word has length 507 [2020-07-22 00:00:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:00:56,613 INFO L479 AbstractCegarLoop]: Abstraction has 279449 states and 452261 transitions. [2020-07-22 00:00:56,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:00:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 279449 states and 452261 transitions. [2020-07-22 00:00:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-22 00:00:56,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:00:56,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:00:56,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:56,930 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:00:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:00:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash 715575988, now seen corresponding path program 1 times [2020-07-22 00:00:56,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:00:56,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526379607] [2020-07-22 00:00:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:00:57,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-22 00:00:57,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:00:57,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:00:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:00:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:00:58,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:00:58,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526379607] [2020-07-22 00:00:58,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:00:58,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:00:58,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976730955] [2020-07-22 00:00:58,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:00:58,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:00:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:00:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:00:58,133 INFO L87 Difference]: Start difference. First operand 279449 states and 452261 transitions. Second operand 3 states. [2020-07-22 00:01:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:01:37,605 INFO L93 Difference]: Finished difference Result 787875 states and 1270017 transitions. [2020-07-22 00:01:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:01:37,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-22 00:01:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:01:38,312 INFO L225 Difference]: With dead ends: 787875 [2020-07-22 00:01:38,312 INFO L226 Difference]: Without dead ends: 533881 [2020-07-22 00:01:38,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:01:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533881 states. [2020-07-22 00:02:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533881 to 283075. [2020-07-22 00:02:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283075 states. [2020-07-22 00:02:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283075 states to 283075 states and 457723 transitions. [2020-07-22 00:02:06,051 INFO L78 Accepts]: Start accepts. Automaton has 283075 states and 457723 transitions. Word has length 507 [2020-07-22 00:02:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:06,051 INFO L479 AbstractCegarLoop]: Abstraction has 283075 states and 457723 transitions. [2020-07-22 00:02:06,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 283075 states and 457723 transitions. [2020-07-22 00:02:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-22 00:02:06,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:06,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:02:06,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:06,366 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash 53774278, now seen corresponding path program 1 times [2020-07-22 00:02:06,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:06,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053398150] [2020-07-22 00:02:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:06,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:02:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-22 00:02:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:07,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:07,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053398150] [2020-07-22 00:02:07,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:07,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:02:07,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439709888] [2020-07-22 00:02:07,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:02:07,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:02:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:02:07,086 INFO L87 Difference]: Start difference. First operand 283075 states and 457723 transitions. Second operand 4 states. [2020-07-22 00:02:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:02:52,215 INFO L93 Difference]: Finished difference Result 838059 states and 1355320 transitions. [2020-07-22 00:02:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-22 00:02:52,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-22 00:02:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:02:52,968 INFO L225 Difference]: With dead ends: 838059 [2020-07-22 00:02:52,968 INFO L226 Difference]: Without dead ends: 556189 [2020-07-22 00:02:53,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-22 00:02:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556189 states. [2020-07-22 00:03:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556189 to 556187. [2020-07-22 00:03:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556187 states. [2020-07-22 00:03:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556187 states to 556187 states and 896132 transitions. [2020-07-22 00:03:48,226 INFO L78 Accepts]: Start accepts. Automaton has 556187 states and 896132 transitions. Word has length 507 [2020-07-22 00:03:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:03:48,226 INFO L479 AbstractCegarLoop]: Abstraction has 556187 states and 896132 transitions. [2020-07-22 00:03:48,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-22 00:03:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 556187 states and 896132 transitions. [2020-07-22 00:03:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-22 00:03:48,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:03:48,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:03:48,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:03:48,690 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:03:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:03:48,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1940876320, now seen corresponding path program 1 times [2020-07-22 00:03:48,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:03:48,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157501970] [2020-07-22 00:03:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:03:49,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-22 00:03:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:03:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1761 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:03:49,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:03:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:03:49,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:03:49,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157501970] [2020-07-22 00:03:49,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:03:49,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:03:49,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368132133] [2020-07-22 00:03:49,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:03:49,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:03:49,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:03:49,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:03:49,256 INFO L87 Difference]: Start difference. First operand 556187 states and 896132 transitions. Second operand 3 states. [2020-07-22 00:05:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:05:18,597 INFO L93 Difference]: Finished difference Result 1566706 states and 2514605 transitions. [2020-07-22 00:05:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:05:18,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-22 00:05:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:05:20,112 INFO L225 Difference]: With dead ends: 1566706 [2020-07-22 00:05:20,112 INFO L226 Difference]: Without dead ends: 1062443 [2020-07-22 00:05:20,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:05:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062443 states. [2020-07-22 00:06:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062443 to 566213. [2020-07-22 00:06:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566213 states. [2020-07-22 00:06:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566213 states to 566213 states and 910422 transitions. [2020-07-22 00:06:19,146 INFO L78 Accepts]: Start accepts. Automaton has 566213 states and 910422 transitions. Word has length 509 [2020-07-22 00:06:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:06:19,146 INFO L479 AbstractCegarLoop]: Abstraction has 566213 states and 910422 transitions. [2020-07-22 00:06:19,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:06:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 566213 states and 910422 transitions. [2020-07-22 00:06:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-22 00:06:19,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:06:19,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:06:19,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:06:19,622 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:06:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:06:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1759268722, now seen corresponding path program 1 times [2020-07-22 00:06:19,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:06:19,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654833391] [2020-07-22 00:06:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:06:20,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-22 00:06:20,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:06:20,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:06:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:06:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:06:21,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:06:21,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654833391] [2020-07-22 00:06:21,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:06:21,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:06:21,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139257635] [2020-07-22 00:06:21,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:06:21,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:06:21,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:06:21,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:06:21,168 INFO L87 Difference]: Start difference. First operand 566213 states and 910422 transitions. Second operand 3 states. [2020-07-22 00:08:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:08:05,806 INFO L93 Difference]: Finished difference Result 1633047 states and 2622296 transitions. [2020-07-22 00:08:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:08:05,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-22 00:08:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:08:07,377 INFO L225 Difference]: With dead ends: 1633047 [2020-07-22 00:08:07,377 INFO L226 Difference]: Without dead ends: 1108055 [2020-07-22 00:08:07,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:08:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108055 states.