/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:20:07,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:20:07,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:20:07,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:20:07,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:20:07,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:20:07,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:20:08,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:20:08,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:20:08,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:20:08,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:20:08,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:20:08,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:20:08,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:20:08,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:20:08,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:20:08,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:20:08,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:20:08,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:20:08,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:20:08,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:20:08,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:20:08,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:20:08,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:20:08,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 02:20:08,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 02:20:08,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 02:20:08,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 02:20:08,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 02:20:08,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 02:20:08,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:20:08,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:20:08,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:20:08,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:20:08,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:20:08,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:20:08,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:20:08,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:20:08,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:20:08,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:20:08,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:20:08,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:20:08,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:20:08,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:20:08,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:20:08,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:20:08,082 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:20:08,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:20:08,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:20:08,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:20:08,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:20:08,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:20:08,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:20:08,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:20:08,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:20:08,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:20:08,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:20:08,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:20:08,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:20:08,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:20:08,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:20:08,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:20:08,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:20:08,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:20:08,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:20:08,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:20:08,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:20:08,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:20:08,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:08,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:20:08,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:20:08,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:20:08,414 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:20:08,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:20:08,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:20:08,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:20:08,432 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:20:08,433 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 02:20:08,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3676ba4/8f08ec67a55a494dbd0e7eee6053c8d4/FLAGa161f1e09 [2020-07-21 02:20:09,106 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:20:09,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 02:20:09,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3676ba4/8f08ec67a55a494dbd0e7eee6053c8d4/FLAGa161f1e09 [2020-07-21 02:20:09,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3676ba4/8f08ec67a55a494dbd0e7eee6053c8d4 [2020-07-21 02:20:09,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:20:09,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:20:09,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:20:09,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:20:09,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:20:09,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:20:09" (1/1) ... [2020-07-21 02:20:09,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfdeb99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:09, skipping insertion in model container [2020-07-21 02:20:09,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:20:09" (1/1) ... [2020-07-21 02:20:09,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:20:09,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:20:10,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:20:10,523 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:20:10,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:20:10,976 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:20:10,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10 WrapperNode [2020-07-21 02:20:10,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:20:10,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:20:10,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:20:10,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:20:11,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... [2020-07-21 02:20:11,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:20:11,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:20:11,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:20:11,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:20:11,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:20:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:20:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:20:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:20:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:20:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:20:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:20:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:20:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:20:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:20:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:20:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:20:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:20:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:20:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:20:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:20:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:20:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:20:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:20:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:20:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:20:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:20:14,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:20:14,122 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:20:14,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:20:14 BoogieIcfgContainer [2020-07-21 02:20:14,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:20:14,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:20:14,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:20:14,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:20:14,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:20:09" (1/3) ... [2020-07-21 02:20:14,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bb77b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:20:14, skipping insertion in model container [2020-07-21 02:20:14,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:10" (2/3) ... [2020-07-21 02:20:14,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bb77b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:20:14, skipping insertion in model container [2020-07-21 02:20:14,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:20:14" (3/3) ... [2020-07-21 02:20:14,144 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 02:20:14,156 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:20:14,165 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:20:14,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:20:14,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:20:14,213 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:20:14,213 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:20:14,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:20:14,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:20:14,214 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:20:14,214 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:20:14,214 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:20:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 02:20:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:20:14,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:14,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:14,278 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 02:20:14,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:14,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226699257] [2020-07-21 02:20:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:14,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:15,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:15,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226699257] [2020-07-21 02:20:15,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:15,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:15,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849828640] [2020-07-21 02:20:15,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:15,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:15,111 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 02:20:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:15,519 INFO L93 Difference]: Finished difference Result 2303 states and 4091 transitions. [2020-07-21 02:20:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:20:15,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 02:20:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:15,563 INFO L225 Difference]: With dead ends: 2303 [2020-07-21 02:20:15,563 INFO L226 Difference]: Without dead ends: 1529 [2020-07-21 02:20:15,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2020-07-21 02:20:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2020-07-21 02:20:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2020-07-21 02:20:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2371 transitions. [2020-07-21 02:20:15,743 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2371 transitions. Word has length 324 [2020-07-21 02:20:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:15,747 INFO L479 AbstractCegarLoop]: Abstraction has 1527 states and 2371 transitions. [2020-07-21 02:20:15,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2371 transitions. [2020-07-21 02:20:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:15,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:15,766 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] [2020-07-21 02:20:15,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:15,978 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash -348485848, now seen corresponding path program 1 times [2020-07-21 02:20:15,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:15,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523575381] [2020-07-21 02:20:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:16,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:16,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:16,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:16,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523575381] [2020-07-21 02:20:16,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:16,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:16,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969085286] [2020-07-21 02:20:16,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:16,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:16,603 INFO L87 Difference]: Start difference. First operand 1527 states and 2371 transitions. Second operand 3 states. [2020-07-21 02:20:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:16,811 INFO L93 Difference]: Finished difference Result 4375 states and 6762 transitions. [2020-07-21 02:20:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:16,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:20:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:16,829 INFO L225 Difference]: With dead ends: 4375 [2020-07-21 02:20:16,829 INFO L226 Difference]: Without dead ends: 2935 [2020-07-21 02:20:16,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2020-07-21 02:20:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2933. [2020-07-21 02:20:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-07-21 02:20:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4519 transitions. [2020-07-21 02:20:16,948 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4519 transitions. Word has length 326 [2020-07-21 02:20:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:16,949 INFO L479 AbstractCegarLoop]: Abstraction has 2933 states and 4519 transitions. [2020-07-21 02:20:16,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4519 transitions. [2020-07-21 02:20:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:16,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:16,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:17,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:17,174 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1549040403, now seen corresponding path program 1 times [2020-07-21 02:20:17,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:17,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590585974] [2020-07-21 02:20:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:17,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:17,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:17,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590585974] [2020-07-21 02:20:17,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:17,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:17,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652302025] [2020-07-21 02:20:17,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:17,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:17,594 INFO L87 Difference]: Start difference. First operand 2933 states and 4519 transitions. Second operand 3 states. [2020-07-21 02:20:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:17,800 INFO L93 Difference]: Finished difference Result 8702 states and 13391 transitions. [2020-07-21 02:20:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:17,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:20:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:17,831 INFO L225 Difference]: With dead ends: 8702 [2020-07-21 02:20:17,831 INFO L226 Difference]: Without dead ends: 5811 [2020-07-21 02:20:17,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2020-07-21 02:20:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 2943. [2020-07-21 02:20:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2943 states. [2020-07-21 02:20:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4533 transitions. [2020-07-21 02:20:17,994 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4533 transitions. Word has length 326 [2020-07-21 02:20:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:17,994 INFO L479 AbstractCegarLoop]: Abstraction has 2943 states and 4533 transitions. [2020-07-21 02:20:17,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4533 transitions. [2020-07-21 02:20:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 02:20:18,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:18,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:18,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:18,219 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1589385571, now seen corresponding path program 1 times [2020-07-21 02:20:18,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:18,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465267383] [2020-07-21 02:20:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:18,552 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:18,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:18,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:18,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465267383] [2020-07-21 02:20:18,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:18,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:18,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359349375] [2020-07-21 02:20:18,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:18,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:18,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:18,627 INFO L87 Difference]: Start difference. First operand 2943 states and 4533 transitions. Second operand 3 states. [2020-07-21 02:20:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:18,883 INFO L93 Difference]: Finished difference Result 8739 states and 13451 transitions. [2020-07-21 02:20:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:18,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 02:20:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:18,921 INFO L225 Difference]: With dead ends: 8739 [2020-07-21 02:20:18,922 INFO L226 Difference]: Without dead ends: 5840 [2020-07-21 02:20:18,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2020-07-21 02:20:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 2958. [2020-07-21 02:20:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2958 states. [2020-07-21 02:20:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 4554 transitions. [2020-07-21 02:20:19,232 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 4554 transitions. Word has length 327 [2020-07-21 02:20:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:19,232 INFO L479 AbstractCegarLoop]: Abstraction has 2958 states and 4554 transitions. [2020-07-21 02:20:19,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 4554 transitions. [2020-07-21 02:20:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 02:20:19,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:19,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:19,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:19,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash -326688029, now seen corresponding path program 1 times [2020-07-21 02:20:19,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:19,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525979172] [2020-07-21 02:20:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:19,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:19,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:19,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525979172] [2020-07-21 02:20:19,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:19,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:19,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139652029] [2020-07-21 02:20:19,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:19,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:19,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:19,905 INFO L87 Difference]: Start difference. First operand 2958 states and 4554 transitions. Second operand 4 states. [2020-07-21 02:20:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:20,195 INFO L93 Difference]: Finished difference Result 6298 states and 9706 transitions. [2020-07-21 02:20:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:20,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 02:20:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:20,217 INFO L225 Difference]: With dead ends: 6298 [2020-07-21 02:20:20,217 INFO L226 Difference]: Without dead ends: 3357 [2020-07-21 02:20:20,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2020-07-21 02:20:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3025. [2020-07-21 02:20:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3025 states. [2020-07-21 02:20:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4661 transitions. [2020-07-21 02:20:20,517 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4661 transitions. Word has length 328 [2020-07-21 02:20:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:20,517 INFO L479 AbstractCegarLoop]: Abstraction has 3025 states and 4661 transitions. [2020-07-21 02:20:20,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4661 transitions. [2020-07-21 02:20:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 02:20:20,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:20,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:20,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:20,749 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1639482187, now seen corresponding path program 1 times [2020-07-21 02:20:20,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:20,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040701799] [2020-07-21 02:20:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:20,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:21,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:21,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:21,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040701799] [2020-07-21 02:20:21,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:21,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:21,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235001071] [2020-07-21 02:20:21,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:21,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:21,076 INFO L87 Difference]: Start difference. First operand 3025 states and 4661 transitions. Second operand 3 states. [2020-07-21 02:20:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:21,309 INFO L93 Difference]: Finished difference Result 9029 states and 13912 transitions. [2020-07-21 02:20:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:21,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 02:20:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:21,342 INFO L225 Difference]: With dead ends: 9029 [2020-07-21 02:20:21,343 INFO L226 Difference]: Without dead ends: 6024 [2020-07-21 02:20:21,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2020-07-21 02:20:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 3032. [2020-07-21 02:20:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3032 states. [2020-07-21 02:20:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4671 transitions. [2020-07-21 02:20:21,647 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4671 transitions. Word has length 330 [2020-07-21 02:20:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:21,648 INFO L479 AbstractCegarLoop]: Abstraction has 3032 states and 4671 transitions. [2020-07-21 02:20:21,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4671 transitions. [2020-07-21 02:20:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 02:20:21,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:21,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:21,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:21,877 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -920947079, now seen corresponding path program 1 times [2020-07-21 02:20:21,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:21,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610716552] [2020-07-21 02:20:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:22,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:22,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:22,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:22,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610716552] [2020-07-21 02:20:22,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:22,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:22,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207106330] [2020-07-21 02:20:22,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:22,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:22,192 INFO L87 Difference]: Start difference. First operand 3032 states and 4671 transitions. Second operand 3 states. [2020-07-21 02:20:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:22,498 INFO L93 Difference]: Finished difference Result 9057 states and 13954 transitions. [2020-07-21 02:20:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:22,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 02:20:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:22,517 INFO L225 Difference]: With dead ends: 9057 [2020-07-21 02:20:22,517 INFO L226 Difference]: Without dead ends: 6043 [2020-07-21 02:20:22,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2020-07-21 02:20:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 3046. [2020-07-21 02:20:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3046 states. [2020-07-21 02:20:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 4691 transitions. [2020-07-21 02:20:22,913 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 4691 transitions. Word has length 331 [2020-07-21 02:20:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:22,914 INFO L479 AbstractCegarLoop]: Abstraction has 3046 states and 4691 transitions. [2020-07-21 02:20:22,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 4691 transitions. [2020-07-21 02:20:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:20:22,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:22,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:23,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:23,139 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash 937671629, now seen corresponding path program 1 times [2020-07-21 02:20:23,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:23,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635168798] [2020-07-21 02:20:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:23,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:23,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:23,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:23,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635168798] [2020-07-21 02:20:23,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:23,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:23,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551380475] [2020-07-21 02:20:23,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:23,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:23,524 INFO L87 Difference]: Start difference. First operand 3046 states and 4691 transitions. Second operand 3 states. [2020-07-21 02:20:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:23,792 INFO L93 Difference]: Finished difference Result 6478 states and 10021 transitions. [2020-07-21 02:20:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:23,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:20:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:23,806 INFO L225 Difference]: With dead ends: 6478 [2020-07-21 02:20:23,806 INFO L226 Difference]: Without dead ends: 4240 [2020-07-21 02:20:23,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2020-07-21 02:20:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3550. [2020-07-21 02:20:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3550 states. [2020-07-21 02:20:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5519 transitions. [2020-07-21 02:20:24,013 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5519 transitions. Word has length 332 [2020-07-21 02:20:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:24,014 INFO L479 AbstractCegarLoop]: Abstraction has 3550 states and 5519 transitions. [2020-07-21 02:20:24,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5519 transitions. [2020-07-21 02:20:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:20:24,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:24,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:24,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:24,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 02:20:24,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:24,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694870190] [2020-07-21 02:20:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:24,552 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:24,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:20:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:24,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:24,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694870190] [2020-07-21 02:20:24,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:24,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 02:20:24,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679995092] [2020-07-21 02:20:24,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:20:24,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:24,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:20:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:20:24,761 INFO L87 Difference]: Start difference. First operand 3550 states and 5519 transitions. Second operand 8 states. [2020-07-21 02:20:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:26,869 INFO L93 Difference]: Finished difference Result 10083 states and 15833 transitions. [2020-07-21 02:20:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 02:20:26,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 02:20:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:26,887 INFO L225 Difference]: With dead ends: 10083 [2020-07-21 02:20:26,887 INFO L226 Difference]: Without dead ends: 7565 [2020-07-21 02:20:26,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 02:20:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2020-07-21 02:20:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 4923. [2020-07-21 02:20:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4923 states. [2020-07-21 02:20:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 7615 transitions. [2020-07-21 02:20:27,222 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 7615 transitions. Word has length 332 [2020-07-21 02:20:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:27,223 INFO L479 AbstractCegarLoop]: Abstraction has 4923 states and 7615 transitions. [2020-07-21 02:20:27,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:20:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 7615 transitions. [2020-07-21 02:20:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:20:27,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:27,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:27,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:27,446 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1088493216, now seen corresponding path program 1 times [2020-07-21 02:20:27,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:27,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581601092] [2020-07-21 02:20:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:27,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:27,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:27,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:27,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581601092] [2020-07-21 02:20:27,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:27,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:27,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076557295] [2020-07-21 02:20:27,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:27,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:27,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:27,817 INFO L87 Difference]: Start difference. First operand 4923 states and 7615 transitions. Second operand 3 states. [2020-07-21 02:20:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:28,213 INFO L93 Difference]: Finished difference Result 10195 states and 15902 transitions. [2020-07-21 02:20:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:28,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:20:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:28,229 INFO L225 Difference]: With dead ends: 10195 [2020-07-21 02:20:28,229 INFO L226 Difference]: Without dead ends: 6154 [2020-07-21 02:20:28,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2020-07-21 02:20:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 5800. [2020-07-21 02:20:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5800 states. [2020-07-21 02:20:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 9056 transitions. [2020-07-21 02:20:28,570 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 9056 transitions. Word has length 332 [2020-07-21 02:20:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:28,571 INFO L479 AbstractCegarLoop]: Abstraction has 5800 states and 9056 transitions. [2020-07-21 02:20:28,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 9056 transitions. [2020-07-21 02:20:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:20:28,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:28,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:28,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:28,792 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -276487765, now seen corresponding path program 1 times [2020-07-21 02:20:28,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:28,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073100481] [2020-07-21 02:20:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:29,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:29,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:29,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:29,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:29,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073100481] [2020-07-21 02:20:29,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:29,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:29,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756356482] [2020-07-21 02:20:29,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:29,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:29,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:29,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:29,237 INFO L87 Difference]: Start difference. First operand 5800 states and 9056 transitions. Second operand 3 states. [2020-07-21 02:20:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:29,790 INFO L93 Difference]: Finished difference Result 16770 states and 26142 transitions. [2020-07-21 02:20:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:29,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:20:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:29,820 INFO L225 Difference]: With dead ends: 16770 [2020-07-21 02:20:29,820 INFO L226 Difference]: Without dead ends: 11208 [2020-07-21 02:20:29,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2020-07-21 02:20:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 11206. [2020-07-21 02:20:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11206 states. [2020-07-21 02:20:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 17386 transitions. [2020-07-21 02:20:30,697 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 17386 transitions. Word has length 332 [2020-07-21 02:20:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:30,698 INFO L479 AbstractCegarLoop]: Abstraction has 11206 states and 17386 transitions. [2020-07-21 02:20:30,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 17386 transitions. [2020-07-21 02:20:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:20:30,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:30,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:30,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:30,929 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash -485032027, now seen corresponding path program 1 times [2020-07-21 02:20:30,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:30,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756733661] [2020-07-21 02:20:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:31,174 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:31,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:20:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:31,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:31,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756733661] [2020-07-21 02:20:31,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:31,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:31,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004437151] [2020-07-21 02:20:31,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:31,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:31,298 INFO L87 Difference]: Start difference. First operand 11206 states and 17386 transitions. Second operand 4 states. [2020-07-21 02:20:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:32,317 INFO L93 Difference]: Finished difference Result 31817 states and 49237 transitions. [2020-07-21 02:20:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:32,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 02:20:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:32,371 INFO L225 Difference]: With dead ends: 31817 [2020-07-21 02:20:32,371 INFO L226 Difference]: Without dead ends: 21128 [2020-07-21 02:20:32,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21128 states. [2020-07-21 02:20:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21128 to 11450. [2020-07-21 02:20:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11450 states. [2020-07-21 02:20:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11450 states to 11450 states and 17800 transitions. [2020-07-21 02:20:33,051 INFO L78 Accepts]: Start accepts. Automaton has 11450 states and 17800 transitions. Word has length 332 [2020-07-21 02:20:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:33,052 INFO L479 AbstractCegarLoop]: Abstraction has 11450 states and 17800 transitions. [2020-07-21 02:20:33,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 11450 states and 17800 transitions. [2020-07-21 02:20:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:20:33,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:33,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:33,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:33,836 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash -815790061, now seen corresponding path program 1 times [2020-07-21 02:20:33,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:33,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046944672] [2020-07-21 02:20:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:34,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:34,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:34,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:34,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046944672] [2020-07-21 02:20:34,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:34,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:34,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658015897] [2020-07-21 02:20:34,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:34,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:34,215 INFO L87 Difference]: Start difference. First operand 11450 states and 17800 transitions. Second operand 3 states. [2020-07-21 02:20:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:35,160 INFO L93 Difference]: Finished difference Result 32834 states and 50774 transitions. [2020-07-21 02:20:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:35,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 02:20:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:35,205 INFO L225 Difference]: With dead ends: 32834 [2020-07-21 02:20:35,205 INFO L226 Difference]: Without dead ends: 22155 [2020-07-21 02:20:35,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22155 states. [2020-07-21 02:20:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22155 to 11549. [2020-07-21 02:20:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 02:20:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17934 transitions. [2020-07-21 02:20:35,884 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17934 transitions. Word has length 334 [2020-07-21 02:20:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:35,884 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17934 transitions. [2020-07-21 02:20:35,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17934 transitions. [2020-07-21 02:20:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 02:20:35,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:35,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:36,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:36,101 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1417835857, now seen corresponding path program 1 times [2020-07-21 02:20:36,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:36,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621093107] [2020-07-21 02:20:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:36,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:36,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:36,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621093107] [2020-07-21 02:20:36,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:36,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:20:36,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355643167] [2020-07-21 02:20:36,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:20:36,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:20:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:36,487 INFO L87 Difference]: Start difference. First operand 11549 states and 17934 transitions. Second operand 5 states. [2020-07-21 02:20:37,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:37,479 INFO L93 Difference]: Finished difference Result 21275 states and 33033 transitions. [2020-07-21 02:20:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:20:37,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-07-21 02:20:37,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:37,495 INFO L225 Difference]: With dead ends: 21275 [2020-07-21 02:20:37,495 INFO L226 Difference]: Without dead ends: 11549 [2020-07-21 02:20:37,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:20:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11549 states. [2020-07-21 02:20:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11549 to 11549. [2020-07-21 02:20:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 02:20:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17824 transitions. [2020-07-21 02:20:38,140 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17824 transitions. Word has length 335 [2020-07-21 02:20:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:38,141 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17824 transitions. [2020-07-21 02:20:38,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:20:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17824 transitions. [2020-07-21 02:20:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 02:20:38,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:38,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:38,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:38,367 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 387279148, now seen corresponding path program 1 times [2020-07-21 02:20:38,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:38,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393712908] [2020-07-21 02:20:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:38,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:38,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:38,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:38,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:38,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393712908] [2020-07-21 02:20:38,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:38,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:38,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41810000] [2020-07-21 02:20:38,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:38,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:38,906 INFO L87 Difference]: Start difference. First operand 11549 states and 17824 transitions. Second operand 4 states. [2020-07-21 02:20:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:40,000 INFO L93 Difference]: Finished difference Result 33912 states and 52317 transitions. [2020-07-21 02:20:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:40,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-21 02:20:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:40,036 INFO L225 Difference]: With dead ends: 33912 [2020-07-21 02:20:40,036 INFO L226 Difference]: Without dead ends: 22534 [2020-07-21 02:20:40,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2020-07-21 02:20:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22532. [2020-07-21 02:20:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22532 states. [2020-07-21 02:20:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22532 states to 22532 states and 34549 transitions. [2020-07-21 02:20:41,280 INFO L78 Accepts]: Start accepts. Automaton has 22532 states and 34549 transitions. Word has length 335 [2020-07-21 02:20:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:41,281 INFO L479 AbstractCegarLoop]: Abstraction has 22532 states and 34549 transitions. [2020-07-21 02:20:41,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22532 states and 34549 transitions. [2020-07-21 02:20:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:20:41,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:41,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:41,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:41,498 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:41,499 INFO L82 PathProgramCache]: Analyzing trace with hash 941612388, now seen corresponding path program 1 times [2020-07-21 02:20:41,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:41,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069884959] [2020-07-21 02:20:41,500 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:41,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:41,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:41,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:41,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069884959] [2020-07-21 02:20:41,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:41,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:41,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005231182] [2020-07-21 02:20:41,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:41,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:41,861 INFO L87 Difference]: Start difference. First operand 22532 states and 34549 transitions. Second operand 3 states. [2020-07-21 02:20:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:44,545 INFO L93 Difference]: Finished difference Result 64786 states and 98879 transitions. [2020-07-21 02:20:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:44,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:20:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:44,587 INFO L225 Difference]: With dead ends: 64786 [2020-07-21 02:20:44,587 INFO L226 Difference]: Without dead ends: 43632 [2020-07-21 02:20:44,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43632 states. [2020-07-21 02:20:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43632 to 22748. [2020-07-21 02:20:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22748 states. [2020-07-21 02:20:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22748 states to 22748 states and 34830 transitions. [2020-07-21 02:20:46,042 INFO L78 Accepts]: Start accepts. Automaton has 22748 states and 34830 transitions. Word has length 336 [2020-07-21 02:20:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:46,042 INFO L479 AbstractCegarLoop]: Abstraction has 22748 states and 34830 transitions. [2020-07-21 02:20:46,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 22748 states and 34830 transitions. [2020-07-21 02:20:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 02:20:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:46,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:46,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:46,261 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 943899740, now seen corresponding path program 1 times [2020-07-21 02:20:46,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:46,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277452131] [2020-07-21 02:20:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:46,548 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:46,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:46,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277452131] [2020-07-21 02:20:46,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:46,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:46,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412344583] [2020-07-21 02:20:46,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:46,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:46,641 INFO L87 Difference]: Start difference. First operand 22748 states and 34830 transitions. Second operand 3 states. [2020-07-21 02:20:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:48,953 INFO L93 Difference]: Finished difference Result 66265 states and 101191 transitions. [2020-07-21 02:20:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:48,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 02:20:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:48,995 INFO L225 Difference]: With dead ends: 66265 [2020-07-21 02:20:48,995 INFO L226 Difference]: Without dead ends: 44623 [2020-07-21 02:20:49,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44623 states. [2020-07-21 02:20:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44623 to 44621. [2020-07-21 02:20:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44621 states. [2020-07-21 02:20:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44621 states to 44621 states and 67842 transitions. [2020-07-21 02:20:51,566 INFO L78 Accepts]: Start accepts. Automaton has 44621 states and 67842 transitions. Word has length 337 [2020-07-21 02:20:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:51,567 INFO L479 AbstractCegarLoop]: Abstraction has 44621 states and 67842 transitions. [2020-07-21 02:20:51,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 44621 states and 67842 transitions. [2020-07-21 02:20:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:20:51,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:51,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:51,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:51,786 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash -76537344, now seen corresponding path program 1 times [2020-07-21 02:20:51,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:51,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57515142] [2020-07-21 02:20:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:52,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:52,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:52,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:20:52,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:52,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:52,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57515142] [2020-07-21 02:20:52,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:52,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:52,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398396824] [2020-07-21 02:20:52,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:52,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:52,110 INFO L87 Difference]: Start difference. First operand 44621 states and 67842 transitions. Second operand 4 states. [2020-07-21 02:20:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:57,439 INFO L93 Difference]: Finished difference Result 130210 states and 197637 transitions. [2020-07-21 02:20:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:57,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 02:20:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:57,530 INFO L225 Difference]: With dead ends: 130210 [2020-07-21 02:20:57,530 INFO L226 Difference]: Without dead ends: 88718 [2020-07-21 02:20:57,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88718 states. [2020-07-21 02:21:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88718 to 47676. [2020-07-21 02:21:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 02:21:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72745 transitions. [2020-07-21 02:21:00,847 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72745 transitions. Word has length 338 [2020-07-21 02:21:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:00,848 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72745 transitions. [2020-07-21 02:21:00,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72745 transitions. [2020-07-21 02:21:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:21:00,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:00,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:01,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:01,079 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1346166825, now seen corresponding path program 1 times [2020-07-21 02:21:01,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:01,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504356721] [2020-07-21 02:21:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:01,329 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:01,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:01,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504356721] [2020-07-21 02:21:01,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:01,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:01,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407365204] [2020-07-21 02:21:01,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:01,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:01,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:01,393 INFO L87 Difference]: Start difference. First operand 47676 states and 72745 transitions. Second operand 3 states. [2020-07-21 02:21:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:06,032 INFO L93 Difference]: Finished difference Result 91758 states and 139339 transitions. [2020-07-21 02:21:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:06,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 02:21:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:06,096 INFO L225 Difference]: With dead ends: 91758 [2020-07-21 02:21:06,096 INFO L226 Difference]: Without dead ends: 69260 [2020-07-21 02:21:06,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69260 states. [2020-07-21 02:21:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69260 to 47676. [2020-07-21 02:21:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 02:21:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72738 transitions. [2020-07-21 02:21:08,952 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72738 transitions. Word has length 338 [2020-07-21 02:21:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:08,952 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72738 transitions. [2020-07-21 02:21:08,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72738 transitions. [2020-07-21 02:21:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:21:08,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:08,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:09,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:09,194 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1790781151, now seen corresponding path program 1 times [2020-07-21 02:21:09,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:09,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850093061] [2020-07-21 02:21:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:09,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:09,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:21:09,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:09,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:09,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850093061] [2020-07-21 02:21:09,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:09,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:09,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191389346] [2020-07-21 02:21:09,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:09,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:09,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:09,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:09,510 INFO L87 Difference]: Start difference. First operand 47676 states and 72738 transitions. Second operand 4 states. [2020-07-21 02:21:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:14,622 INFO L93 Difference]: Finished difference Result 128367 states and 194760 transitions. [2020-07-21 02:21:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:14,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 02:21:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:14,710 INFO L225 Difference]: With dead ends: 128367 [2020-07-21 02:21:14,710 INFO L226 Difference]: Without dead ends: 86453 [2020-07-21 02:21:14,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:21:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86453 states. [2020-07-21 02:21:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86453 to 50226. [2020-07-21 02:21:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50226 states. [2020-07-21 02:21:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50226 states to 50226 states and 76627 transitions. [2020-07-21 02:21:19,518 INFO L78 Accepts]: Start accepts. Automaton has 50226 states and 76627 transitions. Word has length 338 [2020-07-21 02:21:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:19,518 INFO L479 AbstractCegarLoop]: Abstraction has 50226 states and 76627 transitions. [2020-07-21 02:21:19,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 50226 states and 76627 transitions. [2020-07-21 02:21:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 02:21:19,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:19,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:19,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:19,744 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2145516863, now seen corresponding path program 1 times [2020-07-21 02:21:19,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:19,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560598154] [2020-07-21 02:21:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:20,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:21:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:20,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:20,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560598154] [2020-07-21 02:21:20,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:20,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014579945] [2020-07-21 02:21:20,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:20,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:20,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:20,229 INFO L87 Difference]: Start difference. First operand 50226 states and 76627 transitions. Second operand 4 states. [2020-07-21 02:21:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:23,757 INFO L93 Difference]: Finished difference Result 107141 states and 163193 transitions. [2020-07-21 02:21:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:23,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 02:21:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:23,811 INFO L225 Difference]: With dead ends: 107141 [2020-07-21 02:21:23,812 INFO L226 Difference]: Without dead ends: 54023 [2020-07-21 02:21:23,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:21:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54023 states. [2020-07-21 02:21:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54023 to 54017. [2020-07-21 02:21:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54017 states. [2020-07-21 02:21:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54017 states to 54017 states and 81808 transitions. [2020-07-21 02:21:27,228 INFO L78 Accepts]: Start accepts. Automaton has 54017 states and 81808 transitions. Word has length 339 [2020-07-21 02:21:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:27,228 INFO L479 AbstractCegarLoop]: Abstraction has 54017 states and 81808 transitions. [2020-07-21 02:21:27,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54017 states and 81808 transitions. [2020-07-21 02:21:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 02:21:27,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:27,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:27,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:27,456 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:27,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:27,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1897326802, now seen corresponding path program 1 times [2020-07-21 02:21:27,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:27,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643988334] [2020-07-21 02:21:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:27,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:27,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:21:27,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:27,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:27,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643988334] [2020-07-21 02:21:27,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:27,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:27,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130203841] [2020-07-21 02:21:27,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:27,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:27,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:27,793 INFO L87 Difference]: Start difference. First operand 54017 states and 81808 transitions. Second operand 4 states. [2020-07-21 02:21:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:34,494 INFO L93 Difference]: Finished difference Result 138860 states and 208961 transitions. [2020-07-21 02:21:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:34,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 02:21:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:34,598 INFO L225 Difference]: With dead ends: 138860 [2020-07-21 02:21:34,598 INFO L226 Difference]: Without dead ends: 96158 [2020-07-21 02:21:34,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:21:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96158 states. [2020-07-21 02:21:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96158 to 57651. [2020-07-21 02:21:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57651 states. [2020-07-21 02:21:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57651 states to 57651 states and 87465 transitions. [2020-07-21 02:21:38,716 INFO L78 Accepts]: Start accepts. Automaton has 57651 states and 87465 transitions. Word has length 340 [2020-07-21 02:21:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:38,716 INFO L479 AbstractCegarLoop]: Abstraction has 57651 states and 87465 transitions. [2020-07-21 02:21:38,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 57651 states and 87465 transitions. [2020-07-21 02:21:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 02:21:38,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:38,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:38,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:38,953 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1775562027, now seen corresponding path program 1 times [2020-07-21 02:21:38,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:38,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815251707] [2020-07-21 02:21:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:39,241 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:21:39,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:39,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:39,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815251707] [2020-07-21 02:21:39,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:39,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:39,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736023904] [2020-07-21 02:21:39,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:39,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:39,353 INFO L87 Difference]: Start difference. First operand 57651 states and 87465 transitions. Second operand 3 states. [2020-07-21 02:21:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:47,551 INFO L93 Difference]: Finished difference Result 157308 states and 237515 transitions. [2020-07-21 02:21:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:47,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 02:21:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:47,655 INFO L225 Difference]: With dead ends: 157308 [2020-07-21 02:21:47,655 INFO L226 Difference]: Without dead ends: 110298 [2020-07-21 02:21:47,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110298 states. [2020-07-21 02:21:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110298 to 110296. [2020-07-21 02:21:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110296 states. [2020-07-21 02:21:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110296 states to 110296 states and 166081 transitions. [2020-07-21 02:21:55,028 INFO L78 Accepts]: Start accepts. Automaton has 110296 states and 166081 transitions. Word has length 341 [2020-07-21 02:21:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:55,028 INFO L479 AbstractCegarLoop]: Abstraction has 110296 states and 166081 transitions. [2020-07-21 02:21:55,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 110296 states and 166081 transitions. [2020-07-21 02:21:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:21:55,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:55,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:55,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:55,281 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash 572764343, now seen corresponding path program 1 times [2020-07-21 02:21:55,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:55,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020157607] [2020-07-21 02:21:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:55,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:55,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:55,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:55,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:55,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020157607] [2020-07-21 02:21:55,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:55,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:55,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182141383] [2020-07-21 02:21:55,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:55,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:55,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:55,844 INFO L87 Difference]: Start difference. First operand 110296 states and 166081 transitions. Second operand 3 states. [2020-07-21 02:22:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:10,111 INFO L93 Difference]: Finished difference Result 277644 states and 414967 transitions. [2020-07-21 02:22:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:22:10,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 02:22:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:10,323 INFO L225 Difference]: With dead ends: 277644 [2020-07-21 02:22:10,323 INFO L226 Difference]: Without dead ends: 194066 [2020-07-21 02:22:10,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194066 states. [2020-07-21 02:22:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194066 to 111376. [2020-07-21 02:22:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111376 states. [2020-07-21 02:22:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111376 states to 111376 states and 167501 transitions. [2020-07-21 02:22:22,201 INFO L78 Accepts]: Start accepts. Automaton has 111376 states and 167501 transitions. Word has length 342 [2020-07-21 02:22:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:22,202 INFO L479 AbstractCegarLoop]: Abstraction has 111376 states and 167501 transitions. [2020-07-21 02:22:22,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111376 states and 167501 transitions. [2020-07-21 02:22:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:22:22,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:22,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:22:22,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:22,467 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash -465543073, now seen corresponding path program 1 times [2020-07-21 02:22:22,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:22,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735522373] [2020-07-21 02:22:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:22,716 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:22:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:22:22,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:22,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735522373] [2020-07-21 02:22:22,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:22,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:22:22,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638658955] [2020-07-21 02:22:22,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:22:22,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:22:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:22:22,781 INFO L87 Difference]: Start difference. First operand 111376 states and 167501 transitions. Second operand 4 states. [2020-07-21 02:22:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:33,388 INFO L93 Difference]: Finished difference Result 197073 states and 295844 transitions. [2020-07-21 02:22:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:22:33,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-21 02:22:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:33,535 INFO L225 Difference]: With dead ends: 197073 [2020-07-21 02:22:33,535 INFO L226 Difference]: Without dead ends: 157505 [2020-07-21 02:22:33,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:22:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157505 states. [2020-07-21 02:22:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157505 to 119017. [2020-07-21 02:22:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119017 states. [2020-07-21 02:22:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119017 states to 119017 states and 179222 transitions. [2020-07-21 02:22:42,392 INFO L78 Accepts]: Start accepts. Automaton has 119017 states and 179222 transitions. Word has length 342 [2020-07-21 02:22:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:42,392 INFO L479 AbstractCegarLoop]: Abstraction has 119017 states and 179222 transitions. [2020-07-21 02:22:42,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:22:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 119017 states and 179222 transitions. [2020-07-21 02:22:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:22:42,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:42,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:22:42,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:42,658 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1125984775, now seen corresponding path program 1 times [2020-07-21 02:22:42,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:42,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874494045] [2020-07-21 02:22:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:42,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:42,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:22:42,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:22:42,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:42,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874494045] [2020-07-21 02:22:42,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:42,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:22:42,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783961955] [2020-07-21 02:22:42,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:22:42,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:22:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:22:42,978 INFO L87 Difference]: Start difference. First operand 119017 states and 179222 transitions. Second operand 4 states. [2020-07-21 02:22:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:54,523 INFO L93 Difference]: Finished difference Result 261484 states and 389159 transitions. [2020-07-21 02:22:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:22:54,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-21 02:22:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:54,672 INFO L225 Difference]: With dead ends: 261484 [2020-07-21 02:22:54,673 INFO L226 Difference]: Without dead ends: 133933 [2020-07-21 02:22:54,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:22:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133933 states. [2020-07-21 02:23:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133933 to 133931. [2020-07-21 02:23:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133931 states. [2020-07-21 02:23:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133931 states to 133931 states and 197598 transitions. [2020-07-21 02:23:07,321 INFO L78 Accepts]: Start accepts. Automaton has 133931 states and 197598 transitions. Word has length 343 [2020-07-21 02:23:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:07,322 INFO L479 AbstractCegarLoop]: Abstraction has 133931 states and 197598 transitions. [2020-07-21 02:23:07,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 133931 states and 197598 transitions. [2020-07-21 02:23:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:23:07,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:07,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:07,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:07,609 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash 332815650, now seen corresponding path program 1 times [2020-07-21 02:23:07,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:07,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430166278] [2020-07-21 02:23:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:07,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:07,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:08,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430166278] [2020-07-21 02:23:08,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:08,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:08,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697774159] [2020-07-21 02:23:08,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:08,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:08,126 INFO L87 Difference]: Start difference. First operand 133931 states and 197598 transitions. Second operand 3 states. [2020-07-21 02:23:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:25,070 INFO L93 Difference]: Finished difference Result 351341 states and 517927 transitions. [2020-07-21 02:23:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:25,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 02:23:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:25,333 INFO L225 Difference]: With dead ends: 351341 [2020-07-21 02:23:25,333 INFO L226 Difference]: Without dead ends: 230235 [2020-07-21 02:23:25,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230235 states. [2020-07-21 02:23:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230235 to 129579. [2020-07-21 02:23:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129579 states. [2020-07-21 02:23:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129579 states to 129579 states and 191067 transitions. [2020-07-21 02:23:40,457 INFO L78 Accepts]: Start accepts. Automaton has 129579 states and 191067 transitions. Word has length 343 [2020-07-21 02:23:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:40,458 INFO L479 AbstractCegarLoop]: Abstraction has 129579 states and 191067 transitions. [2020-07-21 02:23:40,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 129579 states and 191067 transitions. [2020-07-21 02:23:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:23:40,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:40,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:40,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:40,732 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash -481817221, now seen corresponding path program 1 times [2020-07-21 02:23:40,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:40,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288523327] [2020-07-21 02:23:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:40,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:40,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:40,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:41,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:41,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288523327] [2020-07-21 02:23:41,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:41,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:41,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608980212] [2020-07-21 02:23:41,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:41,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:41,029 INFO L87 Difference]: Start difference. First operand 129579 states and 191067 transitions. Second operand 3 states. [2020-07-21 02:23:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:57,283 INFO L93 Difference]: Finished difference Result 312449 states and 459918 transitions. [2020-07-21 02:23:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:57,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 02:23:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:57,537 INFO L225 Difference]: With dead ends: 312449 [2020-07-21 02:23:57,538 INFO L226 Difference]: Without dead ends: 220857 [2020-07-21 02:23:57,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220857 states. [2020-07-21 02:24:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220857 to 131539. [2020-07-21 02:24:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131539 states. [2020-07-21 02:24:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131539 states to 131539 states and 193649 transitions. [2020-07-21 02:24:13,392 INFO L78 Accepts]: Start accepts. Automaton has 131539 states and 193649 transitions. Word has length 343 [2020-07-21 02:24:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:13,392 INFO L479 AbstractCegarLoop]: Abstraction has 131539 states and 193649 transitions. [2020-07-21 02:24:13,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 131539 states and 193649 transitions. [2020-07-21 02:24:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 02:24:13,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:13,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:13,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:13,671 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:13,671 INFO L82 PathProgramCache]: Analyzing trace with hash 276113738, now seen corresponding path program 1 times [2020-07-21 02:24:13,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:13,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170553654] [2020-07-21 02:24:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:13,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:14,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:14,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170553654] [2020-07-21 02:24:14,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:14,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:14,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040863023] [2020-07-21 02:24:14,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:14,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:14,050 INFO L87 Difference]: Start difference. First operand 131539 states and 193649 transitions. Second operand 4 states. [2020-07-21 02:24:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:26,291 INFO L93 Difference]: Finished difference Result 287581 states and 421597 transitions. [2020-07-21 02:24:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:26,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 02:24:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:26,453 INFO L225 Difference]: With dead ends: 287581 [2020-07-21 02:24:26,453 INFO L226 Difference]: Without dead ends: 138816 [2020-07-21 02:24:26,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138816 states. [2020-07-21 02:24:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138816 to 138814. [2020-07-21 02:24:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138814 states. [2020-07-21 02:24:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138814 states to 138814 states and 202614 transitions. [2020-07-21 02:24:41,679 INFO L78 Accepts]: Start accepts. Automaton has 138814 states and 202614 transitions. Word has length 344 [2020-07-21 02:24:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:41,679 INFO L479 AbstractCegarLoop]: Abstraction has 138814 states and 202614 transitions. [2020-07-21 02:24:41,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 138814 states and 202614 transitions. [2020-07-21 02:24:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 02:24:41,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:41,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:41,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:41,971 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:41,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1076892410, now seen corresponding path program 1 times [2020-07-21 02:24:41,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:41,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688023063] [2020-07-21 02:24:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:42,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:42,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:42,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:42,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688023063] [2020-07-21 02:24:42,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:42,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:42,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973673827] [2020-07-21 02:24:42,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:42,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:42,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:42,367 INFO L87 Difference]: Start difference. First operand 138814 states and 202614 transitions. Second operand 4 states. [2020-07-21 02:25:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:03,462 INFO L93 Difference]: Finished difference Result 391421 states and 569935 transitions. [2020-07-21 02:25:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:25:03,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 02:25:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:03,776 INFO L225 Difference]: With dead ends: 391421 [2020-07-21 02:25:03,777 INFO L226 Difference]: Without dead ends: 256069 [2020-07-21 02:25:03,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:25:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256069 states. [2020-07-21 02:25:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256069 to 256067. [2020-07-21 02:25:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256067 states. [2020-07-21 02:25:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256067 states to 256067 states and 370603 transitions. [2020-07-21 02:25:29,345 INFO L78 Accepts]: Start accepts. Automaton has 256067 states and 370603 transitions. Word has length 344 [2020-07-21 02:25:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:29,346 INFO L479 AbstractCegarLoop]: Abstraction has 256067 states and 370603 transitions. [2020-07-21 02:25:29,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 256067 states and 370603 transitions. [2020-07-21 02:25:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 02:25:29,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:29,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:29,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:29,723 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:29,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1852880630, now seen corresponding path program 1 times [2020-07-21 02:25:29,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:29,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493522968] [2020-07-21 02:25:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:30,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:25:30,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:30,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:30,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493522968] [2020-07-21 02:25:30,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:30,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:30,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696277011] [2020-07-21 02:25:30,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:30,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:30,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:30,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:30,136 INFO L87 Difference]: Start difference. First operand 256067 states and 370603 transitions. Second operand 3 states. [2020-07-21 02:26:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:14,738 INFO L93 Difference]: Finished difference Result 691835 states and 998204 transitions. [2020-07-21 02:26:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:26:14,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 02:26:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:15,454 INFO L225 Difference]: With dead ends: 691835 [2020-07-21 02:26:15,455 INFO L226 Difference]: Without dead ends: 485407 [2020-07-21 02:26:15,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:26:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485407 states. [2020-07-21 02:27:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485407 to 485405. [2020-07-21 02:27:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485405 states. [2020-07-21 02:27:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485405 states to 485405 states and 696622 transitions. [2020-07-21 02:27:05,756 INFO L78 Accepts]: Start accepts. Automaton has 485405 states and 696622 transitions. Word has length 346 [2020-07-21 02:27:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:05,756 INFO L479 AbstractCegarLoop]: Abstraction has 485405 states and 696622 transitions. [2020-07-21 02:27:05,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 485405 states and 696622 transitions. [2020-07-21 02:27:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 02:27:06,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:06,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:06,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:06,354 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1664677053, now seen corresponding path program 1 times [2020-07-21 02:27:06,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:06,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950795585] [2020-07-21 02:27:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:06,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:06,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:06,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950795585] [2020-07-21 02:27:06,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:06,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:06,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266333042] [2020-07-21 02:27:06,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:06,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:06,701 INFO L87 Difference]: Start difference. First operand 485405 states and 696622 transitions. Second operand 3 states. [2020-07-21 02:28:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:31,650 INFO L93 Difference]: Finished difference Result 1171190 states and 1681978 transitions. [2020-07-21 02:28:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:31,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-21 02:28:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:32,888 INFO L225 Difference]: With dead ends: 1171190 [2020-07-21 02:28:32,888 INFO L226 Difference]: Without dead ends: 828525 [2020-07-21 02:28:33,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828525 states. [2020-07-21 02:29:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828525 to 493249. [2020-07-21 02:29:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493249 states. [2020-07-21 02:29:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493249 states to 493249 states and 704314 transitions. [2020-07-21 02:29:28,519 INFO L78 Accepts]: Start accepts. Automaton has 493249 states and 704314 transitions. Word has length 347 [2020-07-21 02:29:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:28,520 INFO L479 AbstractCegarLoop]: Abstraction has 493249 states and 704314 transitions. [2020-07-21 02:29:28,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:29:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 493249 states and 704314 transitions. [2020-07-21 02:29:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 02:29:28,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:28,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:29,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:29,076 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1355375446, now seen corresponding path program 1 times [2020-07-21 02:29:29,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:29,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752150321] [2020-07-21 02:29:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:29,329 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:29,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:29,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752150321] [2020-07-21 02:29:29,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:29,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:29,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319803477] [2020-07-21 02:29:29,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:29,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:29,408 INFO L87 Difference]: Start difference. First operand 493249 states and 704314 transitions. Second operand 3 states. [2020-07-21 02:30:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:42,374 INFO L93 Difference]: Finished difference Result 998165 states and 1431307 transitions. [2020-07-21 02:30:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:42,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-07-21 02:30:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:43,293 INFO L225 Difference]: With dead ends: 998165 [2020-07-21 02:30:43,293 INFO L226 Difference]: Without dead ends: 723095 [2020-07-21 02:30:43,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723095 states. [2020-07-21 02:31:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723095 to 493308. [2020-07-21 02:31:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493308 states. [2020-07-21 02:31:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493308 states to 493308 states and 704317 transitions. [2020-07-21 02:31:41,823 INFO L78 Accepts]: Start accepts. Automaton has 493308 states and 704317 transitions. Word has length 348 [2020-07-21 02:31:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:41,823 INFO L479 AbstractCegarLoop]: Abstraction has 493308 states and 704317 transitions. [2020-07-21 02:31:41,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 493308 states and 704317 transitions. [2020-07-21 02:31:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 02:31:42,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:42,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:42,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:42,393 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:42,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1465789504, now seen corresponding path program 1 times [2020-07-21 02:31:42,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:42,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675758366] [2020-07-21 02:31:42,395 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:43,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:43,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:31:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:43,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:43,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675758366] [2020-07-21 02:31:43,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:43,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:31:43,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817769314] [2020-07-21 02:31:43,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:31:43,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:43,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:31:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:31:43,587 INFO L87 Difference]: Start difference. First operand 493308 states and 704317 transitions. Second operand 4 states.