/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 NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:05:34,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:05:34,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:05:34,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:05:34,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:05:34,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:05:34,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:05:34,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:05:34,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:05:34,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:05:34,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:05:34,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:05:34,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:05:34,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:05:34,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:05:34,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:05:34,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:05:34,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:05:34,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:05:34,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:05:34,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:05:34,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:05:34,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:05:34,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:05:34,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:05:34,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:05:34,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:05:34,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:05:34,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:05:34,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:05:34,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:05:34,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:05:34,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:05:34,154 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:05:34,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:05:34,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:05:34,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:05:34,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:05:34,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:05:34,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:05:34,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:05:34,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:05:34,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:05:34,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:05:34,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:05:34,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:05:34,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:05:34,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:05:34,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:05:34,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:05:34,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:05:34,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:05:34,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:05:34,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:05:34,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:05:34,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:34,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:05:34,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:05:34,159 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 -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 15:05:34,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:05:34,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:05:34,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:05:34,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:05:34,440 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:05:34,441 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 15:05:34,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbb325f5d/1bc98401cf31446ca4f74cb19dbc15fe/FLAG7ba921733 [2020-07-20 15:05:35,107 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:05:35,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 15:05:35,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbb325f5d/1bc98401cf31446ca4f74cb19dbc15fe/FLAG7ba921733 [2020-07-20 15:05:35,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbb325f5d/1bc98401cf31446ca4f74cb19dbc15fe [2020-07-20 15:05:35,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:05:35,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:05:35,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:05:35,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:05:35,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:05:35,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:05:35" (1/1) ... [2020-07-20 15:05:35,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da7f1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:35, skipping insertion in model container [2020-07-20 15:05:35,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:05:35" (1/1) ... [2020-07-20 15:05:35,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:05:35,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:05:36,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:05:36,389 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:05:36,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:05:36,939 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:05:36,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36 WrapperNode [2020-07-20 15:05:36,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:05:36,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:05:36,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:05:36,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:05:36,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:36,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:37,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:37,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:37,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:37,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:37,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... [2020-07-20 15:05:37,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:05:37,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:05:37,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:05:37,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:05:37,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:05:37,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:05:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:05:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:05:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:05:37,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:05:37,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:05:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 15:05:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:05:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:05:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:05:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:05:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:05:39,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:05:39,645 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:05:39,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:05:39 BoogieIcfgContainer [2020-07-20 15:05:39,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:05:39,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:05:39,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:05:39,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:05:39,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:05:35" (1/3) ... [2020-07-20 15:05:39,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a7a63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:05:39, skipping insertion in model container [2020-07-20 15:05:39,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:36" (2/3) ... [2020-07-20 15:05:39,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a7a63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:05:39, skipping insertion in model container [2020-07-20 15:05:39,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:05:39" (3/3) ... [2020-07-20 15:05:39,663 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 15:05:39,674 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:05:39,683 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 15:05:39,698 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 15:05:39,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:05:39,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:05:39,726 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:05:39,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:05:39,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:05:39,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:05:39,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:05:39,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:05:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-20 15:05:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 15:05:39,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:39,786 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] [2020-07-20 15:05:39,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:39,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-20 15:05:39,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:39,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679463694] [2020-07-20 15:05:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:40,242 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:40,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:40,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:40,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:40,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679463694] [2020-07-20 15:05:40,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:40,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:40,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112622332] [2020-07-20 15:05:40,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:40,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:40,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:40,552 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-07-20 15:05:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:40,834 INFO L93 Difference]: Finished difference Result 2331 states and 4131 transitions. [2020-07-20 15:05:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:05:40,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-20 15:05:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:40,863 INFO L225 Difference]: With dead ends: 2331 [2020-07-20 15:05:40,864 INFO L226 Difference]: Without dead ends: 1544 [2020-07-20 15:05:40,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2020-07-20 15:05:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1542. [2020-07-20 15:05:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2020-07-20 15:05:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2405 transitions. [2020-07-20 15:05:41,029 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2405 transitions. Word has length 318 [2020-07-20 15:05:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:41,031 INFO L479 AbstractCegarLoop]: Abstraction has 1542 states and 2405 transitions. [2020-07-20 15:05:41,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2405 transitions. [2020-07-20 15:05:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 15:05:41,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:41,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:41,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:41,265 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 302605579, now seen corresponding path program 1 times [2020-07-20 15:05:41,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:41,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464120183] [2020-07-20 15:05:41,268 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:41,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:41,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:41,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:41,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464120183] [2020-07-20 15:05:41,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:41,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:41,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236581112] [2020-07-20 15:05:41,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:41,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:41,774 INFO L87 Difference]: Start difference. First operand 1542 states and 2405 transitions. Second operand 3 states. [2020-07-20 15:05:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:41,954 INFO L93 Difference]: Finished difference Result 4428 states and 6877 transitions. [2020-07-20 15:05:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:41,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-20 15:05:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:41,971 INFO L225 Difference]: With dead ends: 4428 [2020-07-20 15:05:41,971 INFO L226 Difference]: Without dead ends: 2988 [2020-07-20 15:05:41,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2020-07-20 15:05:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2986. [2020-07-20 15:05:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2986 states. [2020-07-20 15:05:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 4627 transitions. [2020-07-20 15:05:42,101 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 4627 transitions. Word has length 320 [2020-07-20 15:05:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:42,108 INFO L479 AbstractCegarLoop]: Abstraction has 2986 states and 4627 transitions. [2020-07-20 15:05:42,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 4627 transitions. [2020-07-20 15:05:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 15:05:42,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:42,119 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] [2020-07-20 15:05:42,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:42,330 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash -897948976, now seen corresponding path program 1 times [2020-07-20 15:05:42,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:42,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800141572] [2020-07-20 15:05:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:42,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:05:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:42,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:42,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:42,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800141572] [2020-07-20 15:05:42,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:42,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:42,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541707254] [2020-07-20 15:05:42,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:42,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:42,700 INFO L87 Difference]: Start difference. First operand 2986 states and 4627 transitions. Second operand 3 states. [2020-07-20 15:05:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:42,955 INFO L93 Difference]: Finished difference Result 8926 states and 13832 transitions. [2020-07-20 15:05:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:42,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-20 15:05:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:42,983 INFO L225 Difference]: With dead ends: 8926 [2020-07-20 15:05:42,984 INFO L226 Difference]: Without dead ends: 5955 [2020-07-20 15:05:42,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2020-07-20 15:05:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 2997. [2020-07-20 15:05:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2997 states. [2020-07-20 15:05:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 4643 transitions. [2020-07-20 15:05:43,135 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 4643 transitions. Word has length 320 [2020-07-20 15:05:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:43,136 INFO L479 AbstractCegarLoop]: Abstraction has 2997 states and 4643 transitions. [2020-07-20 15:05:43,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 4643 transitions. [2020-07-20 15:05:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-20 15:05:43,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:43,145 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] [2020-07-20 15:05:43,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:43,359 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2018350710, now seen corresponding path program 1 times [2020-07-20 15:05:43,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:43,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767821541] [2020-07-20 15:05:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:43,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:43,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:43,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767821541] [2020-07-20 15:05:43,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:43,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:43,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857462529] [2020-07-20 15:05:43,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:43,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:43,704 INFO L87 Difference]: Start difference. First operand 2997 states and 4643 transitions. Second operand 3 states. [2020-07-20 15:05:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:43,945 INFO L93 Difference]: Finished difference Result 8883 states and 13750 transitions. [2020-07-20 15:05:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:43,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2020-07-20 15:05:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:43,973 INFO L225 Difference]: With dead ends: 8883 [2020-07-20 15:05:43,974 INFO L226 Difference]: Without dead ends: 5916 [2020-07-20 15:05:43,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2020-07-20 15:05:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 3007. [2020-07-20 15:05:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3007 states. [2020-07-20 15:05:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 4657 transitions. [2020-07-20 15:05:44,135 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 4657 transitions. Word has length 321 [2020-07-20 15:05:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:44,136 INFO L479 AbstractCegarLoop]: Abstraction has 3007 states and 4657 transitions. [2020-07-20 15:05:44,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 4657 transitions. [2020-07-20 15:05:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 15:05:44,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:44,145 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] [2020-07-20 15:05:44,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:44,361 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1297982278, now seen corresponding path program 1 times [2020-07-20 15:05:44,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:44,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423473530] [2020-07-20 15:05:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:44,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:44,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:44,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:44,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:44,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423473530] [2020-07-20 15:05:44,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:44,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:44,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798298470] [2020-07-20 15:05:44,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:44,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:44,753 INFO L87 Difference]: Start difference. First operand 3007 states and 4657 transitions. Second operand 4 states. [2020-07-20 15:05:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:45,104 INFO L93 Difference]: Finished difference Result 8801 states and 13610 transitions. [2020-07-20 15:05:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:05:45,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-20 15:05:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:45,134 INFO L225 Difference]: With dead ends: 8801 [2020-07-20 15:05:45,138 INFO L226 Difference]: Without dead ends: 5857 [2020-07-20 15:05:45,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2020-07-20 15:05:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 5855. [2020-07-20 15:05:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5855 states. [2020-07-20 15:05:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 8998 transitions. [2020-07-20 15:05:45,400 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 8998 transitions. Word has length 322 [2020-07-20 15:05:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:45,400 INFO L479 AbstractCegarLoop]: Abstraction has 5855 states and 8998 transitions. [2020-07-20 15:05:45,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 8998 transitions. [2020-07-20 15:05:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 15:05:45,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:45,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:45,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:45,630 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 162086605, now seen corresponding path program 1 times [2020-07-20 15:05:45,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:45,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383434304] [2020-07-20 15:05:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:45,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:45,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:46,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:46,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383434304] [2020-07-20 15:05:46,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:46,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:46,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595532658] [2020-07-20 15:05:46,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:46,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:46,095 INFO L87 Difference]: Start difference. First operand 5855 states and 8998 transitions. Second operand 3 states. [2020-07-20 15:05:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:46,516 INFO L93 Difference]: Finished difference Result 16803 states and 25705 transitions. [2020-07-20 15:05:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:46,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-20 15:05:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:46,555 INFO L225 Difference]: With dead ends: 16803 [2020-07-20 15:05:46,555 INFO L226 Difference]: Without dead ends: 11369 [2020-07-20 15:05:46,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11369 states. [2020-07-20 15:05:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11369 to 11367. [2020-07-20 15:05:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11367 states. [2020-07-20 15:05:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 17347 transitions. [2020-07-20 15:05:47,093 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 17347 transitions. Word has length 324 [2020-07-20 15:05:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:47,093 INFO L479 AbstractCegarLoop]: Abstraction has 11367 states and 17347 transitions. [2020-07-20 15:05:47,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 17347 transitions. [2020-07-20 15:05:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 15:05:47,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:47,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:47,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:47,340 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash -622729454, now seen corresponding path program 1 times [2020-07-20 15:05:47,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:47,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557116249] [2020-07-20 15:05:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:47,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:05:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:47,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:47,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557116249] [2020-07-20 15:05:47,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:47,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:47,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940230303] [2020-07-20 15:05:47,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:47,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:47,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:47,639 INFO L87 Difference]: Start difference. First operand 11367 states and 17347 transitions. Second operand 3 states. [2020-07-20 15:05:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:48,351 INFO L93 Difference]: Finished difference Result 33485 states and 50996 transitions. [2020-07-20 15:05:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:48,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-20 15:05:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:48,405 INFO L225 Difference]: With dead ends: 33485 [2020-07-20 15:05:48,405 INFO L226 Difference]: Without dead ends: 22426 [2020-07-20 15:05:48,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22426 states. [2020-07-20 15:05:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22426 to 11406. [2020-07-20 15:05:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11406 states. [2020-07-20 15:05:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 17395 transitions. [2020-07-20 15:05:48,944 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 17395 transitions. Word has length 324 [2020-07-20 15:05:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:48,945 INFO L479 AbstractCegarLoop]: Abstraction has 11406 states and 17395 transitions. [2020-07-20 15:05:48,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 17395 transitions. [2020-07-20 15:05:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-20 15:05:48,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:48,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:49,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:49,736 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:49,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2009935300, now seen corresponding path program 1 times [2020-07-20 15:05:49,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:49,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930614781] [2020-07-20 15:05:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:49,994 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:50,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:50,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930614781] [2020-07-20 15:05:50,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:50,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:50,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696132517] [2020-07-20 15:05:50,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:50,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:50,080 INFO L87 Difference]: Start difference. First operand 11406 states and 17395 transitions. Second operand 3 states. [2020-07-20 15:05:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:50,772 INFO L93 Difference]: Finished difference Result 33537 states and 51053 transitions. [2020-07-20 15:05:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:50,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-07-20 15:05:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:50,820 INFO L225 Difference]: With dead ends: 33537 [2020-07-20 15:05:50,820 INFO L226 Difference]: Without dead ends: 22334 [2020-07-20 15:05:50,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22334 states. [2020-07-20 15:05:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22334 to 11434. [2020-07-20 15:05:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11434 states. [2020-07-20 15:05:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 17419 transitions. [2020-07-20 15:05:51,454 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 17419 transitions. Word has length 325 [2020-07-20 15:05:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:51,455 INFO L479 AbstractCegarLoop]: Abstraction has 11434 states and 17419 transitions. [2020-07-20 15:05:51,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 17419 transitions. [2020-07-20 15:05:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 15:05:51,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:51,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:51,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:51,688 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2012335736, now seen corresponding path program 1 times [2020-07-20 15:05:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:51,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634946835] [2020-07-20 15:05:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:51,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:51,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:52,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:52,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634946835] [2020-07-20 15:05:52,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:52,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:52,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789502497] [2020-07-20 15:05:52,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:52,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:52,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:52,033 INFO L87 Difference]: Start difference. First operand 11434 states and 17419 transitions. Second operand 4 states. [2020-07-20 15:05:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:52,752 INFO L93 Difference]: Finished difference Result 33255 states and 50546 transitions. [2020-07-20 15:05:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:05:52,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 15:05:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:52,781 INFO L225 Difference]: With dead ends: 33255 [2020-07-20 15:05:52,781 INFO L226 Difference]: Without dead ends: 22213 [2020-07-20 15:05:52,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22213 states. [2020-07-20 15:05:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22213 to 22211. [2020-07-20 15:05:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22211 states. [2020-07-20 15:05:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22211 states to 22211 states and 33565 transitions. [2020-07-20 15:05:53,736 INFO L78 Accepts]: Start accepts. Automaton has 22211 states and 33565 transitions. Word has length 326 [2020-07-20 15:05:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:53,736 INFO L479 AbstractCegarLoop]: Abstraction has 22211 states and 33565 transitions. [2020-07-20 15:05:53,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22211 states and 33565 transitions. [2020-07-20 15:05:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 15:05:53,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:53,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:53,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:53,973 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash 445257945, now seen corresponding path program 1 times [2020-07-20 15:05:53,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:53,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145723370] [2020-07-20 15:05:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:54,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:54,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:54,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145723370] [2020-07-20 15:05:54,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:54,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:54,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810938592] [2020-07-20 15:05:54,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:54,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:54,340 INFO L87 Difference]: Start difference. First operand 22211 states and 33565 transitions. Second operand 4 states. [2020-07-20 15:05:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:55,761 INFO L93 Difference]: Finished difference Result 64568 states and 97345 transitions. [2020-07-20 15:05:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:05:55,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-20 15:05:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:55,820 INFO L225 Difference]: With dead ends: 64568 [2020-07-20 15:05:55,820 INFO L226 Difference]: Without dead ends: 42818 [2020-07-20 15:05:55,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42818 states. [2020-07-20 15:05:58,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42818 to 42816. [2020-07-20 15:05:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42816 states. [2020-07-20 15:05:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42816 states to 42816 states and 64118 transitions. [2020-07-20 15:05:58,102 INFO L78 Accepts]: Start accepts. Automaton has 42816 states and 64118 transitions. Word has length 327 [2020-07-20 15:05:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:58,102 INFO L479 AbstractCegarLoop]: Abstraction has 42816 states and 64118 transitions. [2020-07-20 15:05:58,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42816 states and 64118 transitions. [2020-07-20 15:05:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 15:05:58,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:58,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:58,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:58,343 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:58,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1816215109, now seen corresponding path program 1 times [2020-07-20 15:05:58,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:58,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739432003] [2020-07-20 15:05:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:58,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:05:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:05:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:58,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:58,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739432003] [2020-07-20 15:05:58,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:58,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:58,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176471183] [2020-07-20 15:05:58,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:58,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:58,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:58,625 INFO L87 Difference]: Start difference. First operand 42816 states and 64118 transitions. Second operand 4 states. [2020-07-20 15:06:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:02,243 INFO L93 Difference]: Finished difference Result 124783 states and 186105 transitions. [2020-07-20 15:06:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:02,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-07-20 15:06:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:02,329 INFO L225 Difference]: With dead ends: 124783 [2020-07-20 15:06:02,329 INFO L226 Difference]: Without dead ends: 85293 [2020-07-20 15:06:02,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85293 states. [2020-07-20 15:06:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85293 to 46443. [2020-07-20 15:06:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46443 states. [2020-07-20 15:06:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46443 states to 46443 states and 70263 transitions. [2020-07-20 15:06:04,216 INFO L78 Accepts]: Start accepts. Automaton has 46443 states and 70263 transitions. Word has length 329 [2020-07-20 15:06:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:04,217 INFO L479 AbstractCegarLoop]: Abstraction has 46443 states and 70263 transitions. [2020-07-20 15:06:04,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46443 states and 70263 transitions. [2020-07-20 15:06:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 15:06:04,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:04,260 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] [2020-07-20 15:06:04,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:04,474 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1744831576, now seen corresponding path program 1 times [2020-07-20 15:06:04,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:04,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912531720] [2020-07-20 15:06:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:04,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:04,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:04,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:04,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912531720] [2020-07-20 15:06:04,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:04,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:04,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399872596] [2020-07-20 15:06:04,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:04,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:04,830 INFO L87 Difference]: Start difference. First operand 46443 states and 70263 transitions. Second operand 4 states. [2020-07-20 15:06:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:07,026 INFO L93 Difference]: Finished difference Result 98521 states and 149377 transitions. [2020-07-20 15:06:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:07,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-07-20 15:06:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:07,077 INFO L225 Difference]: With dead ends: 98521 [2020-07-20 15:06:07,077 INFO L226 Difference]: Without dead ends: 52456 [2020-07-20 15:06:07,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52456 states. [2020-07-20 15:06:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52456 to 46290. [2020-07-20 15:06:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46290 states. [2020-07-20 15:06:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46290 states to 46290 states and 69932 transitions. [2020-07-20 15:06:10,195 INFO L78 Accepts]: Start accepts. Automaton has 46290 states and 69932 transitions. Word has length 329 [2020-07-20 15:06:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:10,196 INFO L479 AbstractCegarLoop]: Abstraction has 46290 states and 69932 transitions. [2020-07-20 15:06:10,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46290 states and 69932 transitions. [2020-07-20 15:06:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 15:06:10,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:10,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:10,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:10,440 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2019635489, now seen corresponding path program 1 times [2020-07-20 15:06:10,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:10,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760391799] [2020-07-20 15:06:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:10,662 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:10,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:10,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:10,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:10,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760391799] [2020-07-20 15:06:10,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:10,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:10,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75362610] [2020-07-20 15:06:10,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:10,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:10,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:10,736 INFO L87 Difference]: Start difference. First operand 46290 states and 69932 transitions. Second operand 4 states. [2020-07-20 15:06:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:13,720 INFO L93 Difference]: Finished difference Result 122510 states and 183470 transitions. [2020-07-20 15:06:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:13,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 15:06:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:13,792 INFO L225 Difference]: With dead ends: 122510 [2020-07-20 15:06:13,792 INFO L226 Difference]: Without dead ends: 82332 [2020-07-20 15:06:13,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82332 states. [2020-07-20 15:06:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82332 to 50464. [2020-07-20 15:06:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50464 states. [2020-07-20 15:06:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50464 states to 50464 states and 76796 transitions. [2020-07-20 15:06:17,661 INFO L78 Accepts]: Start accepts. Automaton has 50464 states and 76796 transitions. Word has length 331 [2020-07-20 15:06:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:17,661 INFO L479 AbstractCegarLoop]: Abstraction has 50464 states and 76796 transitions. [2020-07-20 15:06:17,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 50464 states and 76796 transitions. [2020-07-20 15:06:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 15:06:17,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:17,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:17,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:17,903 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash -330851890, now seen corresponding path program 1 times [2020-07-20 15:06:17,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:17,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553662933] [2020-07-20 15:06:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:18,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:18,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:18,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:18,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553662933] [2020-07-20 15:06:18,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:18,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:18,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813293786] [2020-07-20 15:06:18,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:18,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:18,178 INFO L87 Difference]: Start difference. First operand 50464 states and 76796 transitions. Second operand 3 states. [2020-07-20 15:06:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:21,335 INFO L93 Difference]: Finished difference Result 130414 states and 194722 transitions. [2020-07-20 15:06:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:21,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 15:06:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:21,425 INFO L225 Difference]: With dead ends: 130414 [2020-07-20 15:06:21,425 INFO L226 Difference]: Without dead ends: 90582 [2020-07-20 15:06:21,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90582 states. [2020-07-20 15:06:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90582 to 51860. [2020-07-20 15:06:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51860 states. [2020-07-20 15:06:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51860 states to 51860 states and 78444 transitions. [2020-07-20 15:06:24,030 INFO L78 Accepts]: Start accepts. Automaton has 51860 states and 78444 transitions. Word has length 333 [2020-07-20 15:06:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:24,030 INFO L479 AbstractCegarLoop]: Abstraction has 51860 states and 78444 transitions. [2020-07-20 15:06:24,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 51860 states and 78444 transitions. [2020-07-20 15:06:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:06:24,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:24,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:24,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:24,268 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:24,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1669456026, now seen corresponding path program 1 times [2020-07-20 15:06:24,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:24,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940506002] [2020-07-20 15:06:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:24,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:24,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:24,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:24,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:24,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940506002] [2020-07-20 15:06:24,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:24,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:24,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377795751] [2020-07-20 15:06:24,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:24,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:24,626 INFO L87 Difference]: Start difference. First operand 51860 states and 78444 transitions. Second operand 4 states. [2020-07-20 15:06:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:27,239 INFO L93 Difference]: Finished difference Result 107354 states and 162151 transitions. [2020-07-20 15:06:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:27,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 15:06:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:27,305 INFO L225 Difference]: With dead ends: 107354 [2020-07-20 15:06:27,305 INFO L226 Difference]: Without dead ends: 61368 [2020-07-20 15:06:27,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61368 states. [2020-07-20 15:06:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61368 to 54602. [2020-07-20 15:06:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54602 states. [2020-07-20 15:06:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54602 states to 54602 states and 83039 transitions. [2020-07-20 15:06:29,936 INFO L78 Accepts]: Start accepts. Automaton has 54602 states and 83039 transitions. Word has length 334 [2020-07-20 15:06:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:29,937 INFO L479 AbstractCegarLoop]: Abstraction has 54602 states and 83039 transitions. [2020-07-20 15:06:29,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 54602 states and 83039 transitions. [2020-07-20 15:06:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 15:06:29,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:29,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:30,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:30,180 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1968270900, now seen corresponding path program 1 times [2020-07-20 15:06:30,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:30,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061065081] [2020-07-20 15:06:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:30,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:30,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:30,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:30,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:30,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:30,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061065081] [2020-07-20 15:06:30,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:30,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:30,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886008537] [2020-07-20 15:06:30,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:30,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:30,475 INFO L87 Difference]: Start difference. First operand 54602 states and 83039 transitions. Second operand 4 states. [2020-07-20 15:06:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:35,698 INFO L93 Difference]: Finished difference Result 147856 states and 223150 transitions. [2020-07-20 15:06:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:35,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 15:06:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:35,813 INFO L225 Difference]: With dead ends: 147856 [2020-07-20 15:06:35,813 INFO L226 Difference]: Without dead ends: 101888 [2020-07-20 15:06:35,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101888 states. [2020-07-20 15:06:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101888 to 63294. [2020-07-20 15:06:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63294 states. [2020-07-20 15:06:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63294 states to 63294 states and 97256 transitions. [2020-07-20 15:06:39,005 INFO L78 Accepts]: Start accepts. Automaton has 63294 states and 97256 transitions. Word has length 335 [2020-07-20 15:06:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:39,006 INFO L479 AbstractCegarLoop]: Abstraction has 63294 states and 97256 transitions. [2020-07-20 15:06:39,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 63294 states and 97256 transitions. [2020-07-20 15:06:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 15:06:39,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:39,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:39,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:39,261 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -131468573, now seen corresponding path program 1 times [2020-07-20 15:06:39,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:39,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445065463] [2020-07-20 15:06:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:39,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:39,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:39,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445065463] [2020-07-20 15:06:39,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:39,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:39,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884468171] [2020-07-20 15:06:39,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:39,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:39,550 INFO L87 Difference]: Start difference. First operand 63294 states and 97256 transitions. Second operand 4 states. [2020-07-20 15:06:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:45,820 INFO L93 Difference]: Finished difference Result 159911 states and 243019 transitions. [2020-07-20 15:06:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:45,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 15:06:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:45,937 INFO L225 Difference]: With dead ends: 159911 [2020-07-20 15:06:45,938 INFO L226 Difference]: Without dead ends: 111648 [2020-07-20 15:06:45,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111648 states. [2020-07-20 15:06:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111648 to 76096. [2020-07-20 15:06:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76096 states. [2020-07-20 15:06:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76096 states to 76096 states and 117623 transitions. [2020-07-20 15:06:49,977 INFO L78 Accepts]: Start accepts. Automaton has 76096 states and 117623 transitions. Word has length 337 [2020-07-20 15:06:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:49,977 INFO L479 AbstractCegarLoop]: Abstraction has 76096 states and 117623 transitions. [2020-07-20 15:06:49,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 76096 states and 117623 transitions. [2020-07-20 15:06:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 15:06:50,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:50,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:50,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:50,245 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash -584747431, now seen corresponding path program 1 times [2020-07-20 15:06:50,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:50,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159554198] [2020-07-20 15:06:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:50,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:50,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:50,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:50,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159554198] [2020-07-20 15:06:50,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:50,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:50,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961518086] [2020-07-20 15:06:50,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:50,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:50,546 INFO L87 Difference]: Start difference. First operand 76096 states and 117623 transitions. Second operand 3 states. [2020-07-20 15:06:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:57,785 INFO L93 Difference]: Finished difference Result 171044 states and 257891 transitions. [2020-07-20 15:06:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:57,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 15:06:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:57,905 INFO L225 Difference]: With dead ends: 171044 [2020-07-20 15:06:57,905 INFO L226 Difference]: Without dead ends: 124049 [2020-07-20 15:06:57,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124049 states. [2020-07-20 15:07:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124049 to 80673. [2020-07-20 15:07:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80673 states. [2020-07-20 15:07:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80673 states to 80673 states and 123001 transitions. [2020-07-20 15:07:02,264 INFO L78 Accepts]: Start accepts. Automaton has 80673 states and 123001 transitions. Word has length 339 [2020-07-20 15:07:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:02,264 INFO L479 AbstractCegarLoop]: Abstraction has 80673 states and 123001 transitions. [2020-07-20 15:07:02,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:07:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 80673 states and 123001 transitions. [2020-07-20 15:07:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:07:02,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:02,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:07:02,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:02,542 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash 891003030, now seen corresponding path program 1 times [2020-07-20 15:07:02,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:02,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049599834] [2020-07-20 15:07:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:02,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:07:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:07:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:02,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:02,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049599834] [2020-07-20 15:07:02,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:02,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:07:02,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505589365] [2020-07-20 15:07:02,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:07:02,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:07:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:07:02,893 INFO L87 Difference]: Start difference. First operand 80673 states and 123001 transitions. Second operand 9 states. [2020-07-20 15:07:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:32,865 INFO L93 Difference]: Finished difference Result 364699 states and 557654 transitions. [2020-07-20 15:07:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 15:07:32,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 340 [2020-07-20 15:07:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:33,253 INFO L225 Difference]: With dead ends: 364699 [2020-07-20 15:07:33,253 INFO L226 Difference]: Without dead ends: 354921 [2020-07-20 15:07:33,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 15:07:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354921 states. [2020-07-20 15:07:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354921 to 145409. [2020-07-20 15:07:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145409 states. [2020-07-20 15:07:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145409 states to 145409 states and 221113 transitions. [2020-07-20 15:07:44,572 INFO L78 Accepts]: Start accepts. Automaton has 145409 states and 221113 transitions. Word has length 340 [2020-07-20 15:07:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:44,573 INFO L479 AbstractCegarLoop]: Abstraction has 145409 states and 221113 transitions. [2020-07-20 15:07:44,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:07:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 145409 states and 221113 transitions. [2020-07-20 15:07:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:07:44,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:44,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:07:44,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:44,880 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 143148843, now seen corresponding path program 1 times [2020-07-20 15:07:44,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:44,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711930195] [2020-07-20 15:07:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:45,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:07:45,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:07:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:45,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:45,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711930195] [2020-07-20 15:07:45,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:45,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:07:45,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156046983] [2020-07-20 15:07:45,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:07:45,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:07:45,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:07:45,194 INFO L87 Difference]: Start difference. First operand 145409 states and 221113 transitions. Second operand 4 states. [2020-07-20 15:08:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:03,938 INFO L93 Difference]: Finished difference Result 358164 states and 541142 transitions. [2020-07-20 15:08:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:08:03,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 15:08:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:04,198 INFO L225 Difference]: With dead ends: 358164 [2020-07-20 15:08:04,199 INFO L226 Difference]: Without dead ends: 252543 [2020-07-20 15:08:04,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:08:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252543 states. [2020-07-20 15:08:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252543 to 165327. [2020-07-20 15:08:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165327 states. [2020-07-20 15:08:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165327 states to 165327 states and 252319 transitions. [2020-07-20 15:08:19,380 INFO L78 Accepts]: Start accepts. Automaton has 165327 states and 252319 transitions. Word has length 340 [2020-07-20 15:08:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:19,380 INFO L479 AbstractCegarLoop]: Abstraction has 165327 states and 252319 transitions. [2020-07-20 15:08:19,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:08:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 165327 states and 252319 transitions. [2020-07-20 15:08:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:08:19,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:19,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:19,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:19,707 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1537125531, now seen corresponding path program 1 times [2020-07-20 15:08:19,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:19,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172256041] [2020-07-20 15:08:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:19,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:19,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:08:19,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:20,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:20,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172256041] [2020-07-20 15:08:20,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:20,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:08:20,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340736741] [2020-07-20 15:08:20,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:08:20,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:08:20,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:08:20,048 INFO L87 Difference]: Start difference. First operand 165327 states and 252319 transitions. Second operand 9 states. [2020-07-20 15:09:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:07,913 INFO L93 Difference]: Finished difference Result 490535 states and 754231 transitions. [2020-07-20 15:09:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-20 15:09:07,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 340 [2020-07-20 15:09:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:08,541 INFO L225 Difference]: With dead ends: 490535 [2020-07-20 15:09:08,541 INFO L226 Difference]: Without dead ends: 475693 [2020-07-20 15:09:08,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=3884, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 15:09:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475693 states. [2020-07-20 15:09:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475693 to 188959. [2020-07-20 15:09:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188959 states. [2020-07-20 15:09:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188959 states to 188959 states and 288415 transitions. [2020-07-20 15:09:27,590 INFO L78 Accepts]: Start accepts. Automaton has 188959 states and 288415 transitions. Word has length 340 [2020-07-20 15:09:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:27,590 INFO L479 AbstractCegarLoop]: Abstraction has 188959 states and 288415 transitions. [2020-07-20 15:09:27,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:09:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 188959 states and 288415 transitions. [2020-07-20 15:09:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:09:27,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:27,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:09:27,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:27,940 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 347567899, now seen corresponding path program 1 times [2020-07-20 15:09:27,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:27,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453378591] [2020-07-20 15:09:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:28,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:09:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:09:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:09:28,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:28,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453378591] [2020-07-20 15:09:28,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:28,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:09:28,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751803793] [2020-07-20 15:09:28,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:09:28,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:09:28,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:28,352 INFO L87 Difference]: Start difference. First operand 188959 states and 288415 transitions. Second operand 3 states. [2020-07-20 15:09:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:50,248 INFO L93 Difference]: Finished difference Result 287107 states and 445553 transitions. [2020-07-20 15:09:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:09:50,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 15:09:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:50,559 INFO L225 Difference]: With dead ends: 287107 [2020-07-20 15:09:50,559 INFO L226 Difference]: Without dead ends: 240233 [2020-07-20 15:09:50,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240233 states. [2020-07-20 15:10:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240233 to 240231. [2020-07-20 15:10:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240231 states. [2020-07-20 15:10:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240231 states to 240231 states and 368807 transitions. [2020-07-20 15:10:15,479 INFO L78 Accepts]: Start accepts. Automaton has 240231 states and 368807 transitions. Word has length 340 [2020-07-20 15:10:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:15,480 INFO L479 AbstractCegarLoop]: Abstraction has 240231 states and 368807 transitions. [2020-07-20 15:10:15,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:10:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 240231 states and 368807 transitions. [2020-07-20 15:10:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:10:15,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:15,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:10:15,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:15,866 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash -797261924, now seen corresponding path program 1 times [2020-07-20 15:10:15,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:15,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747788612] [2020-07-20 15:10:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:16,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:10:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:10:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:10:16,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:16,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747788612] [2020-07-20 15:10:16,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:16,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:10:16,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14526917] [2020-07-20 15:10:16,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:10:16,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:10:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:16,618 INFO L87 Difference]: Start difference. First operand 240231 states and 368807 transitions. Second operand 3 states. [2020-07-20 15:10:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:10:46,758 INFO L93 Difference]: Finished difference Result 464713 states and 715423 transitions. [2020-07-20 15:10:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:10:46,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 15:10:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:10:47,214 INFO L225 Difference]: With dead ends: 464713 [2020-07-20 15:10:47,214 INFO L226 Difference]: Without dead ends: 311977 [2020-07-20 15:10:47,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311977 states. [2020-07-20 15:11:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311977 to 288103. [2020-07-20 15:11:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288103 states. [2020-07-20 15:11:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288103 states to 288103 states and 445043 transitions. [2020-07-20 15:11:19,072 INFO L78 Accepts]: Start accepts. Automaton has 288103 states and 445043 transitions. Word has length 340 [2020-07-20 15:11:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:19,072 INFO L479 AbstractCegarLoop]: Abstraction has 288103 states and 445043 transitions. [2020-07-20 15:11:19,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:11:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 288103 states and 445043 transitions. [2020-07-20 15:11:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:11:19,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:19,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:11:19,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:19,437 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1040439530, now seen corresponding path program 1 times [2020-07-20 15:11:19,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:19,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687669573] [2020-07-20 15:11:19,439 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 [2020-07-20 15:11:19,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:11:19,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:11:19,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:19,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:19,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687669573] [2020-07-20 15:11:19,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:19,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:11:19,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808373177] [2020-07-20 15:11:19,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:11:19,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:11:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:11:19,747 INFO L87 Difference]: Start difference. First operand 288103 states and 445043 transitions. Second operand 4 states. [2020-07-20 15:12:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:12,451 INFO L93 Difference]: Finished difference Result 762365 states and 1173530 transitions. [2020-07-20 15:12:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:12,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-20 15:12:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:13,206 INFO L225 Difference]: With dead ends: 762365 [2020-07-20 15:12:13,207 INFO L226 Difference]: Without dead ends: 520249 [2020-07-20 15:12:13,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520249 states. [2020-07-20 15:12:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520249 to 307088. [2020-07-20 15:12:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307088 states. [2020-07-20 15:12:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307088 states to 307088 states and 475966 transitions. [2020-07-20 15:12:53,300 INFO L78 Accepts]: Start accepts. Automaton has 307088 states and 475966 transitions. Word has length 341 [2020-07-20 15:12:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:53,301 INFO L479 AbstractCegarLoop]: Abstraction has 307088 states and 475966 transitions. [2020-07-20 15:12:53,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 307088 states and 475966 transitions. [2020-07-20 15:12:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:12:53,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:53,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:54,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:54,158 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash -370985784, now seen corresponding path program 1 times [2020-07-20 15:12:54,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:54,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054713888] [2020-07-20 15:12:54,160 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 [2020-07-20 15:12:54,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:54,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:12:54,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:54,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:54,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054713888] [2020-07-20 15:12:54,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:54,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:12:54,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417825967] [2020-07-20 15:12:54,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:12:54,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:54,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:12:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:12:54,551 INFO L87 Difference]: Start difference. First operand 307088 states and 475966 transitions. Second operand 9 states. [2020-07-20 15:15:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:15:58,152 INFO L93 Difference]: Finished difference Result 1559754 states and 2435031 transitions. [2020-07-20 15:15:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 15:15:58,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 341 [2020-07-20 15:15:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:16:00,667 INFO L225 Difference]: With dead ends: 1559754 [2020-07-20 15:16:00,668 INFO L226 Difference]: Without dead ends: 1453572 [2020-07-20 15:16:01,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 15:16:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453572 states. [2020-07-20 15:17:02,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453572 to 411732. [2020-07-20 15:17:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411732 states. [2020-07-20 15:17:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411732 states to 411732 states and 638002 transitions. [2020-07-20 15:17:04,063 INFO L78 Accepts]: Start accepts. Automaton has 411732 states and 638002 transitions. Word has length 341 [2020-07-20 15:17:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:17:04,063 INFO L479 AbstractCegarLoop]: Abstraction has 411732 states and 638002 transitions. [2020-07-20 15:17:04,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:17:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 411732 states and 638002 transitions. [2020-07-20 15:17:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:17:04,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:17:04,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:17:04,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:17:04,497 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:17:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:17:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -273899704, now seen corresponding path program 1 times [2020-07-20 15:17:04,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:17:04,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866339009] [2020-07-20 15:17:04,500 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 [2020-07-20 15:17:04,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:17:04,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:17:04,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:17:04,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:17:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:17:04,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:17:04,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866339009] [2020-07-20 15:17:04,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:17:04,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:17:04,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624311474] [2020-07-20 15:17:04,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:17:04,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:17:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:17:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:17:04,853 INFO L87 Difference]: Start difference. First operand 411732 states and 638002 transitions. Second operand 3 states.