/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 14:46:05,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:46:05,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:46:05,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:46:05,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:46:05,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:46:06,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:46:06,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:46:06,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:46:06,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:46:06,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:46:06,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:46:06,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:46:06,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:46:06,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:46:06,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:46:06,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:46:06,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:46:06,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:46:06,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:46:06,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:46:06,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:46:06,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:46:06,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:46:06,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:46:06,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:46:06,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:46:06,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:46:06,059 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 14:46:06,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:46:06,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:46:06,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:46:06,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:46:06,101 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:46:06,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:46:06,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:46:06,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:46:06,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:46:06,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:46:06,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:46:06,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:46:06,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:46:06,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:46:06,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:46:06,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:46:06,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:46:06,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:46:06,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:46:06,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:46:06,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:46:06,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:46:06,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:46:06,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:46:06,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:46:06,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:46:06,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:06,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:46:06,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:46:06,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:46:06,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:46:06,397 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:46:06,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:46:06,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:46:06,402 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:46:06,403 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 14:46:06,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ad9e5c0/9b35a3be46454597af817f4b531fb4b9/FLAGfd149846e [2020-07-21 14:46:07,060 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:46:07,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 14:46:07,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ad9e5c0/9b35a3be46454597af817f4b531fb4b9/FLAGfd149846e [2020-07-21 14:46:07,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ad9e5c0/9b35a3be46454597af817f4b531fb4b9 [2020-07-21 14:46:07,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:46:07,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:46:07,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:07,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:46:07,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:46:07,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:07" (1/1) ... [2020-07-21 14:46:07,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd48b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:07, skipping insertion in model container [2020-07-21 14:46:07,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:07" (1/1) ... [2020-07-21 14:46:07,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:46:07,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:46:08,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:08,542 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:46:09,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:09,303 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:46:09,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09 WrapperNode [2020-07-21 14:46:09,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:09,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:46:09,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:46:09,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:46:09,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (1/1) ... [2020-07-21 14:46:09,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:46:09,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:46:09,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:46:09,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:46:09,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (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 14:46:09,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:46:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:46:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:46:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:46:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:46:09,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:46:09,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:46:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:46:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:46:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:46:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:46:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:46:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:46:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:46:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:46:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:46:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:46:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:46:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:46:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:46:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:46:11,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:46:11,979 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:46:11,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:11 BoogieIcfgContainer [2020-07-21 14:46:11,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:46:11,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:46:11,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:46:12,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:46:12,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:46:07" (1/3) ... [2020-07-21 14:46:12,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277e35e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:12, skipping insertion in model container [2020-07-21 14:46:12,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:09" (2/3) ... [2020-07-21 14:46:12,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277e35e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:12, skipping insertion in model container [2020-07-21 14:46:12,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:11" (3/3) ... [2020-07-21 14:46:12,014 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 14:46:12,026 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:46:12,040 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:46:12,054 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:46:12,085 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:46:12,085 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:46:12,086 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:46:12,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:46:12,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:46:12,086 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:46:12,086 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:46:12,086 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:46:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 14:46:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 14:46:12,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:12,156 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 14:46:12,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 14:46:12,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:12,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399491398] [2020-07-21 14:46:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:12,640 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:12,953 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 14:46:12,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:12,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399491398] [2020-07-21 14:46:12,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:12,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:12,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535842108] [2020-07-21 14:46:12,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:12,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:12,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:12,983 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 14:46:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:13,398 INFO L93 Difference]: Finished difference Result 2328 states and 4137 transitions. [2020-07-21 14:46:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:46:13,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 14:46:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:13,436 INFO L225 Difference]: With dead ends: 2328 [2020-07-21 14:46:13,436 INFO L226 Difference]: Without dead ends: 1542 [2020-07-21 14:46:13,449 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 14:46:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-21 14:46:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1540. [2020-07-21 14:46:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1540 states. [2020-07-21 14:46:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2395 transitions. [2020-07-21 14:46:13,623 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2395 transitions. Word has length 324 [2020-07-21 14:46:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:13,625 INFO L479 AbstractCegarLoop]: Abstraction has 1540 states and 2395 transitions. [2020-07-21 14:46:13,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2395 transitions. [2020-07-21 14:46:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:13,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:13,639 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 14:46:13,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:13,853 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 559759921, now seen corresponding path program 1 times [2020-07-21 14:46:13,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:13,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565741648] [2020-07-21 14:46:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:14,141 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:14,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:14,349 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 14:46:14,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:14,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565741648] [2020-07-21 14:46:14,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:14,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:14,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229299451] [2020-07-21 14:46:14,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:14,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:14,358 INFO L87 Difference]: Start difference. First operand 1540 states and 2395 transitions. Second operand 3 states. [2020-07-21 14:46:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:14,528 INFO L93 Difference]: Finished difference Result 4422 states and 6847 transitions. [2020-07-21 14:46:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:14,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 14:46:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:14,546 INFO L225 Difference]: With dead ends: 4422 [2020-07-21 14:46:14,546 INFO L226 Difference]: Without dead ends: 2984 [2020-07-21 14:46:14,551 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 14:46:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-07-21 14:46:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2982. [2020-07-21 14:46:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-07-21 14:46:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4607 transitions. [2020-07-21 14:46:14,669 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4607 transitions. Word has length 326 [2020-07-21 14:46:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:14,670 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 4607 transitions. [2020-07-21 14:46:14,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4607 transitions. [2020-07-21 14:46:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:14,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:14,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:14,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:14,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash 59250742, now seen corresponding path program 1 times [2020-07-21 14:46:14,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:14,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752896868] [2020-07-21 14:46:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:15,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:15,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:15,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:15,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752896868] [2020-07-21 14:46:15,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:15,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:15,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080544302] [2020-07-21 14:46:15,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:15,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:15,322 INFO L87 Difference]: Start difference. First operand 2982 states and 4607 transitions. Second operand 3 states. [2020-07-21 14:46:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:15,525 INFO L93 Difference]: Finished difference Result 8914 states and 13772 transitions. [2020-07-21 14:46:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:15,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 14:46:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:15,556 INFO L225 Difference]: With dead ends: 8914 [2020-07-21 14:46:15,556 INFO L226 Difference]: Without dead ends: 5947 [2020-07-21 14:46:15,566 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 14:46:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5947 states. [2020-07-21 14:46:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5947 to 2993. [2020-07-21 14:46:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2020-07-21 14:46:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4623 transitions. [2020-07-21 14:46:15,734 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4623 transitions. Word has length 326 [2020-07-21 14:46:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:15,735 INFO L479 AbstractCegarLoop]: Abstraction has 2993 states and 4623 transitions. [2020-07-21 14:46:15,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4623 transitions. [2020-07-21 14:46:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 14:46:15,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:15,746 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] [2020-07-21 14:46:15,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:15,960 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -882201744, now seen corresponding path program 1 times [2020-07-21 14:46:15,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:15,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3299421] [2020-07-21 14:46:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:16,265 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:16,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:16,338 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 14:46:16,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:16,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3299421] [2020-07-21 14:46:16,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:16,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:16,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363442544] [2020-07-21 14:46:16,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:16,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:16,342 INFO L87 Difference]: Start difference. First operand 2993 states and 4623 transitions. Second operand 3 states. [2020-07-21 14:46:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:16,568 INFO L93 Difference]: Finished difference Result 8871 states and 13690 transitions. [2020-07-21 14:46:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:16,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 14:46:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:16,596 INFO L225 Difference]: With dead ends: 8871 [2020-07-21 14:46:16,597 INFO L226 Difference]: Without dead ends: 5908 [2020-07-21 14:46:16,604 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 14:46:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2020-07-21 14:46:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 3003. [2020-07-21 14:46:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-07-21 14:46:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4637 transitions. [2020-07-21 14:46:16,852 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4637 transitions. Word has length 327 [2020-07-21 14:46:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:16,853 INFO L479 AbstractCegarLoop]: Abstraction has 3003 states and 4637 transitions. [2020-07-21 14:46:16,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4637 transitions. [2020-07-21 14:46:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 14:46:16,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:16,864 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 14:46:17,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:17,077 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2128959444, now seen corresponding path program 1 times [2020-07-21 14:46:17,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:17,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462417933] [2020-07-21 14:46:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:17,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:17,444 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 14:46:17,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:17,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462417933] [2020-07-21 14:46:17,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:17,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:17,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303698672] [2020-07-21 14:46:17,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:17,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:17,447 INFO L87 Difference]: Start difference. First operand 3003 states and 4637 transitions. Second operand 3 states. [2020-07-21 14:46:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:17,750 INFO L93 Difference]: Finished difference Result 8613 states and 13241 transitions. [2020-07-21 14:46:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:17,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 14:46:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:17,779 INFO L225 Difference]: With dead ends: 8613 [2020-07-21 14:46:17,779 INFO L226 Difference]: Without dead ends: 5805 [2020-07-21 14:46:17,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 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 14:46:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2020-07-21 14:46:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5803. [2020-07-21 14:46:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2020-07-21 14:46:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 8898 transitions. [2020-07-21 14:46:18,028 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 8898 transitions. Word has length 328 [2020-07-21 14:46:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:18,029 INFO L479 AbstractCegarLoop]: Abstraction has 5803 states and 8898 transitions. [2020-07-21 14:46:18,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 8898 transitions. [2020-07-21 14:46:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 14:46:18,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:18,042 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 14:46:18,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:18,256 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1426305655, now seen corresponding path program 1 times [2020-07-21 14:46:18,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:18,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264458655] [2020-07-21 14:46:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:18,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:46:18,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:18,589 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 14:46:18,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:18,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264458655] [2020-07-21 14:46:18,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:18,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:18,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970035475] [2020-07-21 14:46:18,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:18,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:18,595 INFO L87 Difference]: Start difference. First operand 5803 states and 8898 transitions. Second operand 4 states. [2020-07-21 14:46:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:19,026 INFO L93 Difference]: Finished difference Result 16042 states and 24430 transitions. [2020-07-21 14:46:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:19,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 14:46:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:19,062 INFO L225 Difference]: With dead ends: 16042 [2020-07-21 14:46:19,062 INFO L226 Difference]: Without dead ends: 10685 [2020-07-21 14:46:19,073 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 14:46:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2020-07-21 14:46:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 6017. [2020-07-21 14:46:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6017 states. [2020-07-21 14:46:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 9262 transitions. [2020-07-21 14:46:19,338 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 9262 transitions. Word has length 328 [2020-07-21 14:46:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:19,338 INFO L479 AbstractCegarLoop]: Abstraction has 6017 states and 9262 transitions. [2020-07-21 14:46:19,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 9262 transitions. [2020-07-21 14:46:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:46:19,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:19,353 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 14:46:19,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:19,567 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash 730242313, now seen corresponding path program 1 times [2020-07-21 14:46:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:19,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080005758] [2020-07-21 14:46:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:19,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:19,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:19,890 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 14:46:19,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:19,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080005758] [2020-07-21 14:46:19,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:19,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:19,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849175311] [2020-07-21 14:46:19,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:19,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:19,893 INFO L87 Difference]: Start difference. First operand 6017 states and 9262 transitions. Second operand 3 states. [2020-07-21 14:46:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:20,264 INFO L93 Difference]: Finished difference Result 12717 states and 19608 transitions. [2020-07-21 14:46:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:20,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 14:46:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:20,283 INFO L225 Difference]: With dead ends: 12717 [2020-07-21 14:46:20,283 INFO L226 Difference]: Without dead ends: 8339 [2020-07-21 14:46:20,293 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 14:46:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2020-07-21 14:46:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 7001. [2020-07-21 14:46:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7001 states. [2020-07-21 14:46:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 10870 transitions. [2020-07-21 14:46:20,568 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 10870 transitions. Word has length 330 [2020-07-21 14:46:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:20,569 INFO L479 AbstractCegarLoop]: Abstraction has 7001 states and 10870 transitions. [2020-07-21 14:46:20,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 10870 transitions. [2020-07-21 14:46:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:46:20,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:20,581 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 14:46:20,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:20,795 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash 858352887, now seen corresponding path program 1 times [2020-07-21 14:46:20,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:20,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603237765] [2020-07-21 14:46:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:21,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:21,150 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 14:46:21,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:21,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603237765] [2020-07-21 14:46:21,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:21,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:21,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635084597] [2020-07-21 14:46:21,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:21,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:21,152 INFO L87 Difference]: Start difference. First operand 7001 states and 10870 transitions. Second operand 3 states. [2020-07-21 14:46:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:21,536 INFO L93 Difference]: Finished difference Result 19711 states and 30314 transitions. [2020-07-21 14:46:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:21,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 14:46:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:21,567 INFO L225 Difference]: With dead ends: 19711 [2020-07-21 14:46:21,568 INFO L226 Difference]: Without dead ends: 13352 [2020-07-21 14:46:21,582 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 14:46:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13352 states. [2020-07-21 14:46:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13352 to 7098. [2020-07-21 14:46:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7098 states. [2020-07-21 14:46:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 11000 transitions. [2020-07-21 14:46:21,896 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 11000 transitions. Word has length 330 [2020-07-21 14:46:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:21,896 INFO L479 AbstractCegarLoop]: Abstraction has 7098 states and 11000 transitions. [2020-07-21 14:46:21,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 11000 transitions. [2020-07-21 14:46:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 14:46:21,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:21,909 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 14:46:22,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:22,125 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash 903222164, now seen corresponding path program 1 times [2020-07-21 14:46:22,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:22,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90347195] [2020-07-21 14:46:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:22,363 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:22,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:22,512 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 14:46:22,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:22,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90347195] [2020-07-21 14:46:22,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:22,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:22,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752353640] [2020-07-21 14:46:22,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:22,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:22,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:22,515 INFO L87 Difference]: Start difference. First operand 7098 states and 11000 transitions. Second operand 3 states. [2020-07-21 14:46:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:22,922 INFO L93 Difference]: Finished difference Result 19834 states and 30465 transitions. [2020-07-21 14:46:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:22,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 14:46:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:22,961 INFO L225 Difference]: With dead ends: 19834 [2020-07-21 14:46:22,961 INFO L226 Difference]: Without dead ends: 13495 [2020-07-21 14:46:22,976 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 14:46:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13495 states. [2020-07-21 14:46:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13495 to 7215. [2020-07-21 14:46:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7215 states. [2020-07-21 14:46:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 11155 transitions. [2020-07-21 14:46:23,375 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 11155 transitions. Word has length 331 [2020-07-21 14:46:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:23,375 INFO L479 AbstractCegarLoop]: Abstraction has 7215 states and 11155 transitions. [2020-07-21 14:46:23,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 11155 transitions. [2020-07-21 14:46:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:23,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:23,387 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 14:46:23,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:23,602 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 14:46:23,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:23,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532235898] [2020-07-21 14:46:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:23,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:23,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:46:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:24,079 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 14:46:24,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532235898] [2020-07-21 14:46:24,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:24,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:46:24,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29015747] [2020-07-21 14:46:24,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:46:24,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:46:24,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:46:24,082 INFO L87 Difference]: Start difference. First operand 7215 states and 11155 transitions. Second operand 9 states. [2020-07-21 14:46:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:30,633 INFO L93 Difference]: Finished difference Result 47594 states and 75108 transitions. [2020-07-21 14:46:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:46:30,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 332 [2020-07-21 14:46:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:30,737 INFO L225 Difference]: With dead ends: 47594 [2020-07-21 14:46:30,737 INFO L226 Difference]: Without dead ends: 45888 [2020-07-21 14:46:30,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:46:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45888 states. [2020-07-21 14:46:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45888 to 17943. [2020-07-21 14:46:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17943 states. [2020-07-21 14:46:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17943 states to 17943 states and 28113 transitions. [2020-07-21 14:46:31,774 INFO L78 Accepts]: Start accepts. Automaton has 17943 states and 28113 transitions. Word has length 332 [2020-07-21 14:46:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:31,777 INFO L479 AbstractCegarLoop]: Abstraction has 17943 states and 28113 transitions. [2020-07-21 14:46:31,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:46:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 17943 states and 28113 transitions. [2020-07-21 14:46:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:31,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:31,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:32,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:32,012 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1837398990, now seen corresponding path program 1 times [2020-07-21 14:46:32,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:32,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981813758] [2020-07-21 14:46:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:32,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:32,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:32,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981813758] [2020-07-21 14:46:32,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:32,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:32,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559281577] [2020-07-21 14:46:32,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:32,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:32,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:32,341 INFO L87 Difference]: Start difference. First operand 17943 states and 28113 transitions. Second operand 3 states. [2020-07-21 14:46:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:33,540 INFO L93 Difference]: Finished difference Result 41459 states and 65529 transitions. [2020-07-21 14:46:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:33,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:46:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:33,579 INFO L225 Difference]: With dead ends: 41459 [2020-07-21 14:46:33,579 INFO L226 Difference]: Without dead ends: 25517 [2020-07-21 14:46:33,612 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 14:46:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25517 states. [2020-07-21 14:46:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25517 to 23197. [2020-07-21 14:46:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23197 states. [2020-07-21 14:46:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23197 states to 23197 states and 36735 transitions. [2020-07-21 14:46:34,719 INFO L78 Accepts]: Start accepts. Automaton has 23197 states and 36735 transitions. Word has length 332 [2020-07-21 14:46:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:34,720 INFO L479 AbstractCegarLoop]: Abstraction has 23197 states and 36735 transitions. [2020-07-21 14:46:34,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 23197 states and 36735 transitions. [2020-07-21 14:46:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:34,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:34,734 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 14:46:34,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:34,941 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:34,942 INFO L82 PathProgramCache]: Analyzing trace with hash 757713930, now seen corresponding path program 1 times [2020-07-21 14:46:34,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:34,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785024000] [2020-07-21 14:46:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:35,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:35,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:46:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:35,282 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 14:46:35,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:35,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785024000] [2020-07-21 14:46:35,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:35,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:35,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435357186] [2020-07-21 14:46:35,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:35,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:35,285 INFO L87 Difference]: Start difference. First operand 23197 states and 36735 transitions. Second operand 4 states. [2020-07-21 14:46:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:37,138 INFO L93 Difference]: Finished difference Result 43182 states and 68276 transitions. [2020-07-21 14:46:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:37,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 14:46:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:37,163 INFO L225 Difference]: With dead ends: 43182 [2020-07-21 14:46:37,163 INFO L226 Difference]: Without dead ends: 20950 [2020-07-21 14:46:37,193 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 14:46:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20950 states. [2020-07-21 14:46:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20950 to 20876. [2020-07-21 14:46:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20876 states. [2020-07-21 14:46:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20876 states to 20876 states and 33035 transitions. [2020-07-21 14:46:38,171 INFO L78 Accepts]: Start accepts. Automaton has 20876 states and 33035 transitions. Word has length 332 [2020-07-21 14:46:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:38,171 INFO L479 AbstractCegarLoop]: Abstraction has 20876 states and 33035 transitions. [2020-07-21 14:46:38,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 20876 states and 33035 transitions. [2020-07-21 14:46:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 14:46:38,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:38,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:38,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:38,390 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1945945451, now seen corresponding path program 1 times [2020-07-21 14:46:38,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:38,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374626982] [2020-07-21 14:46:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:38,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:38,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:38,766 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 14:46:38,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:38,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374626982] [2020-07-21 14:46:38,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:38,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:38,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875776425] [2020-07-21 14:46:38,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:38,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:38,769 INFO L87 Difference]: Start difference. First operand 20876 states and 33035 transitions. Second operand 4 states. [2020-07-21 14:46:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:40,624 INFO L93 Difference]: Finished difference Result 61639 states and 97473 transitions. [2020-07-21 14:46:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:40,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 14:46:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:40,663 INFO L225 Difference]: With dead ends: 61639 [2020-07-21 14:46:40,663 INFO L226 Difference]: Without dead ends: 40976 [2020-07-21 14:46:40,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 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 14:46:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40976 states. [2020-07-21 14:46:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40976 to 40974. [2020-07-21 14:46:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40974 states. [2020-07-21 14:46:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40974 states to 40974 states and 64533 transitions. [2020-07-21 14:46:42,559 INFO L78 Accepts]: Start accepts. Automaton has 40974 states and 64533 transitions. Word has length 333 [2020-07-21 14:46:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:42,559 INFO L479 AbstractCegarLoop]: Abstraction has 40974 states and 64533 transitions. [2020-07-21 14:46:42,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 40974 states and 64533 transitions. [2020-07-21 14:46:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:46:42,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:42,575 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 14:46:42,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:42,783 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash 254132386, now seen corresponding path program 1 times [2020-07-21 14:46:42,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:42,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956880447] [2020-07-21 14:46:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:43,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:43,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:43,134 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 14:46:43,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:43,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956880447] [2020-07-21 14:46:43,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:43,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:43,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671185776] [2020-07-21 14:46:43,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:43,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:43,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:43,135 INFO L87 Difference]: Start difference. First operand 40974 states and 64533 transitions. Second operand 3 states. [2020-07-21 14:46:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:47,221 INFO L93 Difference]: Finished difference Result 120016 states and 188732 transitions. [2020-07-21 14:46:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:47,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 14:46:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:47,309 INFO L225 Difference]: With dead ends: 120016 [2020-07-21 14:46:47,310 INFO L226 Difference]: Without dead ends: 79820 [2020-07-21 14:46:47,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 14:46:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79820 states. [2020-07-21 14:46:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79820 to 79818. [2020-07-21 14:46:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79818 states. [2020-07-21 14:46:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79818 states to 79818 states and 124923 transitions. [2020-07-21 14:46:52,620 INFO L78 Accepts]: Start accepts. Automaton has 79818 states and 124923 transitions. Word has length 335 [2020-07-21 14:46:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:52,620 INFO L479 AbstractCegarLoop]: Abstraction has 79818 states and 124923 transitions. [2020-07-21 14:46:52,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 79818 states and 124923 transitions. [2020-07-21 14:46:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:46:52,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:52,651 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 14:46:52,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:52,853 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1360763581, now seen corresponding path program 1 times [2020-07-21 14:46:52,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:52,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102850326] [2020-07-21 14:46:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:46:53,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:53,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:53,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:53,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102850326] [2020-07-21 14:46:53,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:53,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:53,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638260] [2020-07-21 14:46:53,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:53,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:53,174 INFO L87 Difference]: Start difference. First operand 79818 states and 124923 transitions. Second operand 3 states. [2020-07-21 14:46:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:58,291 INFO L93 Difference]: Finished difference Result 158952 states and 248141 transitions. [2020-07-21 14:46:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:58,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 14:46:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:58,425 INFO L225 Difference]: With dead ends: 158952 [2020-07-21 14:46:58,426 INFO L226 Difference]: Without dead ends: 114800 [2020-07-21 14:46:58,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 14:46:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114800 states. [2020-07-21 14:47:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114800 to 79822. [2020-07-21 14:47:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79822 states. [2020-07-21 14:47:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79822 states to 79822 states and 124925 transitions. [2020-07-21 14:47:04,482 INFO L78 Accepts]: Start accepts. Automaton has 79822 states and 124925 transitions. Word has length 335 [2020-07-21 14:47:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:04,483 INFO L479 AbstractCegarLoop]: Abstraction has 79822 states and 124925 transitions. [2020-07-21 14:47:04,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 79822 states and 124925 transitions. [2020-07-21 14:47:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:47:04,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:04,520 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 14:47:04,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:04,732 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1718375350, now seen corresponding path program 1 times [2020-07-21 14:47:04,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:04,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276995040] [2020-07-21 14:47:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:47:04,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:47:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:05,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:05,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276995040] [2020-07-21 14:47:05,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:05,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:47:05,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360409479] [2020-07-21 14:47:05,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:47:05,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:47:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:47:05,093 INFO L87 Difference]: Start difference. First operand 79822 states and 124925 transitions. Second operand 9 states. [2020-07-21 14:47:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:29,110 INFO L93 Difference]: Finished difference Result 390306 states and 615667 transitions. [2020-07-21 14:47:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 14:47:29,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 335 [2020-07-21 14:47:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:29,675 INFO L225 Difference]: With dead ends: 390306 [2020-07-21 14:47:29,676 INFO L226 Difference]: Without dead ends: 356652 [2020-07-21 14:47:29,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 14:47:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356652 states. [2020-07-21 14:47:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356652 to 190434. [2020-07-21 14:47:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190434 states. [2020-07-21 14:47:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190434 states to 190434 states and 299555 transitions. [2020-07-21 14:47:46,428 INFO L78 Accepts]: Start accepts. Automaton has 190434 states and 299555 transitions. Word has length 335 [2020-07-21 14:47:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:46,428 INFO L479 AbstractCegarLoop]: Abstraction has 190434 states and 299555 transitions. [2020-07-21 14:47:46,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:47:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 190434 states and 299555 transitions. [2020-07-21 14:47:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:47:46,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:46,483 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 14:47:46,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:46,696 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1489812399, now seen corresponding path program 1 times [2020-07-21 14:47:46,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:46,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312438588] [2020-07-21 14:47:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:47:46,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:46,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:47,013 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 14:47:47,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:47,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312438588] [2020-07-21 14:47:47,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:47,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:47,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481976088] [2020-07-21 14:47:47,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:47,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:47,022 INFO L87 Difference]: Start difference. First operand 190434 states and 299555 transitions. Second operand 3 states. [2020-07-21 14:48:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:11,185 INFO L93 Difference]: Finished difference Result 569472 states and 895515 transitions. [2020-07-21 14:48:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:11,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 14:48:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:11,704 INFO L225 Difference]: With dead ends: 569472 [2020-07-21 14:48:11,704 INFO L226 Difference]: Without dead ends: 379820 [2020-07-21 14:48:11,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 14:48:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379820 states. [2020-07-21 14:48:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379820 to 190434. [2020-07-21 14:48:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190434 states. [2020-07-21 14:48:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190434 states to 190434 states and 299551 transitions. [2020-07-21 14:48:29,862 INFO L78 Accepts]: Start accepts. Automaton has 190434 states and 299551 transitions. Word has length 335 [2020-07-21 14:48:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:29,862 INFO L479 AbstractCegarLoop]: Abstraction has 190434 states and 299551 transitions. [2020-07-21 14:48:29,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 190434 states and 299551 transitions. [2020-07-21 14:48:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:48:29,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:29,913 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 14:48:30,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:30,114 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1934530709, now seen corresponding path program 1 times [2020-07-21 14:48:30,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:30,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521361705] [2020-07-21 14:48:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:48:30,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:30,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:30,433 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 14:48:30,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:30,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521361705] [2020-07-21 14:48:30,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:30,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:30,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812382365] [2020-07-21 14:48:30,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:30,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:30,435 INFO L87 Difference]: Start difference. First operand 190434 states and 299551 transitions. Second operand 3 states. [2020-07-21 14:48:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:51,997 INFO L93 Difference]: Finished difference Result 472552 states and 749655 transitions. [2020-07-21 14:48:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:51,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:48:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:52,373 INFO L225 Difference]: With dead ends: 472552 [2020-07-21 14:48:52,373 INFO L226 Difference]: Without dead ends: 289344 [2020-07-21 14:48:52,503 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 14:48:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289344 states. [2020-07-21 14:49:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289344 to 269258. [2020-07-21 14:49:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269258 states. [2020-07-21 14:49:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269258 states to 269258 states and 424735 transitions. [2020-07-21 14:49:16,458 INFO L78 Accepts]: Start accepts. Automaton has 269258 states and 424735 transitions. Word has length 336 [2020-07-21 14:49:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:16,459 INFO L479 AbstractCegarLoop]: Abstraction has 269258 states and 424735 transitions. [2020-07-21 14:49:16,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 269258 states and 424735 transitions. [2020-07-21 14:49:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 14:49:16,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:16,510 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 14:49:16,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:16,711 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash 689658759, now seen corresponding path program 1 times [2020-07-21 14:49:16,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:16,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547017983] [2020-07-21 14:49:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:49:16,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:16,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:16,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:17,567 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 14:49:17,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:17,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547017983] [2020-07-21 14:49:17,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:17,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:17,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836739377] [2020-07-21 14:49:17,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:17,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:17,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:17,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:17,569 INFO L87 Difference]: Start difference. First operand 269258 states and 424735 transitions. Second operand 3 states. [2020-07-21 14:49:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:55,382 INFO L93 Difference]: Finished difference Result 792768 states and 1249417 transitions. [2020-07-21 14:49:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:55,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 14:49:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:56,253 INFO L225 Difference]: With dead ends: 792768 [2020-07-21 14:49:56,254 INFO L226 Difference]: Without dead ends: 525862 [2020-07-21 14:49:56,512 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 14:49:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525862 states. [2020-07-21 14:50:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525862 to 525860. [2020-07-21 14:50:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525860 states. [2020-07-21 14:50:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525860 states to 525860 states and 824872 transitions. [2020-07-21 14:50:46,477 INFO L78 Accepts]: Start accepts. Automaton has 525860 states and 824872 transitions. Word has length 337 [2020-07-21 14:50:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:46,478 INFO L479 AbstractCegarLoop]: Abstraction has 525860 states and 824872 transitions. [2020-07-21 14:50:46,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 525860 states and 824872 transitions. [2020-07-21 14:50:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 14:50:46,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:46,584 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (20)] Forcibly destroying the process [2020-07-21 14:50:47,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:47,489 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash -715123382, now seen corresponding path program 1 times [2020-07-21 14:50:47,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:47,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051473020] [2020-07-21 14:50:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:50:47,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:50:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:47,800 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 14:50:47,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:47,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051473020] [2020-07-21 14:50:47,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:47,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:50:47,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758599595] [2020-07-21 14:50:47,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:50:47,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:50:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:50:47,802 INFO L87 Difference]: Start difference. First operand 525860 states and 824872 transitions. Second operand 4 states. [2020-07-21 14:52:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:52:07,507 INFO L93 Difference]: Finished difference Result 1447563 states and 2267338 transitions. [2020-07-21 14:52:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:52:07,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 14:52:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:52:08,924 INFO L225 Difference]: With dead ends: 1447563 [2020-07-21 14:52:08,924 INFO L226 Difference]: Without dead ends: 926425 [2020-07-21 14:52:09,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:52:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926425 states. [2020-07-21 14:53:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926425 to 512253. [2020-07-21 14:53:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512253 states. [2020-07-21 14:53:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512253 states to 512253 states and 802919 transitions. [2020-07-21 14:53:05,322 INFO L78 Accepts]: Start accepts. Automaton has 512253 states and 802919 transitions. Word has length 337 [2020-07-21 14:53:05,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:05,322 INFO L479 AbstractCegarLoop]: Abstraction has 512253 states and 802919 transitions. [2020-07-21 14:53:05,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:53:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 512253 states and 802919 transitions. [2020-07-21 14:53:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 14:53:05,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:05,445 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 14:53:05,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:05,646 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash 46616022, now seen corresponding path program 1 times [2020-07-21 14:53:05,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:05,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427688187] [2020-07-21 14:53:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:53:05,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:53:05,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:53:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:06,917 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 14:53:06,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:06,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427688187] [2020-07-21 14:53:06,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:06,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:53:06,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107918021] [2020-07-21 14:53:06,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:53:06,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:53:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:53:06,920 INFO L87 Difference]: Start difference. First operand 512253 states and 802919 transitions. Second operand 3 states. [2020-07-21 14:54:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:34,538 INFO L93 Difference]: Finished difference Result 1454894 states and 2279174 transitions. [2020-07-21 14:54:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:34,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 14:54:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:36,176 INFO L225 Difference]: With dead ends: 1454894 [2020-07-21 14:54:36,176 INFO L226 Difference]: Without dead ends: 965386 [2020-07-21 14:54:36,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965386 states. [2020-07-21 14:55:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965386 to 512365. [2020-07-21 14:55:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512365 states. [2020-07-21 14:55:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512365 states to 512365 states and 803061 transitions. [2020-07-21 14:55:34,938 INFO L78 Accepts]: Start accepts. Automaton has 512365 states and 803061 transitions. Word has length 339 [2020-07-21 14:55:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:55:34,938 INFO L479 AbstractCegarLoop]: Abstraction has 512365 states and 803061 transitions. [2020-07-21 14:55:34,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:55:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 512365 states and 803061 transitions. [2020-07-21 14:55:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 14:55:35,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:55:35,045 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 14:55:35,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:55:35,246 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:55:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:55:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1224644435, now seen corresponding path program 1 times [2020-07-21 14:55:35,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:55:35,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67320602] [2020-07-21 14:55:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:55:35,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:55:35,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:55:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:55:35,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:55:35,556 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 14:55:35,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:55:35,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67320602] [2020-07-21 14:55:35,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:55:35,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:55:35,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069537869] [2020-07-21 14:55:35,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:55:35,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:55:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:55:35,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:55:35,558 INFO L87 Difference]: Start difference. First operand 512365 states and 803061 transitions. Second operand 3 states. [2020-07-21 14:57:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:57:02,708 INFO L93 Difference]: Finished difference Result 1523513 states and 2387029 transitions. [2020-07-21 14:57:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:57:02,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-21 14:57:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:57:04,343 INFO L225 Difference]: With dead ends: 1523513 [2020-07-21 14:57:04,344 INFO L226 Difference]: Without dead ends: 1017743 [2020-07-21 14:57:04,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:57:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017743 states.