/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_VARIABLES --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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:27:31,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:27:31,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:27:31,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:27:31,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:27:31,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:27:31,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:27:31,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:27:31,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:27:31,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:27:31,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:27:31,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:27:31,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:27:31,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:27:31,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:27:31,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:27:31,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:27:31,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:27:31,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:27:31,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:27:31,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:27:31,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:27:31,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:27:31,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:27:31,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:27:31,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:27:31,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:27:31,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:27:31,917 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 17:27:31,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:27:31,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:27:31,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:27:31,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:27:31,956 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:27:31,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:27:31,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:27:31,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:27:31,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:27:31,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:27:31,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:27:31,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:27:31,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:27:31,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:27:31,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:27:31,958 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:27:31,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:27:31,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:27:31,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:27:31,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:27:31,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:27:31,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:27:31,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:27:31,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:27:31,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:27:31,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:27:31,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:31,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:27:31,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:27:31,961 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_VARIABLES 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 17:27:32,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:27:32,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:27:32,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:27:32,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:27:32,245 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:27:32,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:27:32,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b76ed3da/03d56a04c4324365a53d6d480bedcc92/FLAG1530bfe34 [2020-07-21 17:27:32,998 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:27:32,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:27:33,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b76ed3da/03d56a04c4324365a53d6d480bedcc92/FLAG1530bfe34 [2020-07-21 17:27:33,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b76ed3da/03d56a04c4324365a53d6d480bedcc92 [2020-07-21 17:27:33,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:27:33,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:27:33,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:27:33,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:27:33,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:27:33,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:27:33" (1/1) ... [2020-07-21 17:27:33,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71343464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:33, skipping insertion in model container [2020-07-21 17:27:33,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:27:33" (1/1) ... [2020-07-21 17:27:33,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:27:33,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:27:34,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:27:34,765 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:27:36,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:27:36,246 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:27:36,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36 WrapperNode [2020-07-21 17:27:36,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:27:36,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:27:36,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:27:36,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:27:36,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... [2020-07-21 17:27:36,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:27:36,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:27:36,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:27:36,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:27:36,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:27:36,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:27:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:27:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:27:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:27:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:27:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:27:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:27:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:27:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:27:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:27:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:27:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:27:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:27:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:27:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:27:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:27:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:27:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:27:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:27:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:27:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:27:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:27:39,894 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:27:39,894 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:27:39,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:27:39 BoogieIcfgContainer [2020-07-21 17:27:39,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:27:39,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:27:39,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:27:39,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:27:39,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:27:33" (1/3) ... [2020-07-21 17:27:39,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb2ab41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:27:39, skipping insertion in model container [2020-07-21 17:27:39,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:36" (2/3) ... [2020-07-21 17:27:39,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb2ab41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:27:39, skipping insertion in model container [2020-07-21 17:27:39,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:27:39" (3/3) ... [2020-07-21 17:27:39,912 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:27:39,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:27:39,932 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-07-21 17:27:39,947 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-07-21 17:27:39,981 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:27:39,981 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:27:39,982 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:27:39,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:27:39,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:27:39,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:27:39,982 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:27:39,982 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:27:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states. [2020-07-21 17:27:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 17:27:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:40,059 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 17:27:40,060 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times [2020-07-21 17:27:40,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:40,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568406200] [2020-07-21 17:27:40,074 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 17:27:40,532 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:27:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:40,766 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 17:27:40,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:40,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568406200] [2020-07-21 17:27:40,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:40,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:40,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896318391] [2020-07-21 17:27:40,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:40,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:40,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:40,793 INFO L87 Difference]: Start difference. First operand 1016 states. Second operand 3 states. [2020-07-21 17:27:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:41,166 INFO L93 Difference]: Finished difference Result 1776 states and 3147 transitions. [2020-07-21 17:27:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:41,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 17:27:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:41,215 INFO L225 Difference]: With dead ends: 1776 [2020-07-21 17:27:41,215 INFO L226 Difference]: Without dead ends: 1481 [2020-07-21 17:27:41,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-07-21 17:27:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1479. [2020-07-21 17:27:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1479 states. [2020-07-21 17:27:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2266 transitions. [2020-07-21 17:27:41,396 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 2266 transitions. Word has length 324 [2020-07-21 17:27:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:41,400 INFO L479 AbstractCegarLoop]: Abstraction has 1479 states and 2266 transitions. [2020-07-21 17:27:41,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 2266 transitions. [2020-07-21 17:27:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 17:27:41,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:41,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:41,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:41,633 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash -220420006, now seen corresponding path program 1 times [2020-07-21 17:27:41,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:41,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433834559] [2020-07-21 17:27:41,635 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 17:27:41,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:41,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:27:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:42,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:42,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433834559] [2020-07-21 17:27:42,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:42,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:42,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785467985] [2020-07-21 17:27:42,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:42,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:42,170 INFO L87 Difference]: Start difference. First operand 1479 states and 2266 transitions. Second operand 3 states. [2020-07-21 17:27:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:42,421 INFO L93 Difference]: Finished difference Result 2852 states and 4423 transitions. [2020-07-21 17:27:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:42,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 17:27:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:42,436 INFO L225 Difference]: With dead ends: 2852 [2020-07-21 17:27:42,436 INFO L226 Difference]: Without dead ends: 2439 [2020-07-21 17:27:42,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2020-07-21 17:27:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2437. [2020-07-21 17:27:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2020-07-21 17:27:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3757 transitions. [2020-07-21 17:27:42,524 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3757 transitions. Word has length 324 [2020-07-21 17:27:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:42,525 INFO L479 AbstractCegarLoop]: Abstraction has 2437 states and 3757 transitions. [2020-07-21 17:27:42,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3757 transitions. [2020-07-21 17:27:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 17:27:42,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:42,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:42,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:42,749 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash -578874774, now seen corresponding path program 1 times [2020-07-21 17:27:42,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:42,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298893522] [2020-07-21 17:27:42,751 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 17:27:43,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:27:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:43,345 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 17:27:43,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:43,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298893522] [2020-07-21 17:27:43,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:43,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:27:43,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271033854] [2020-07-21 17:27:43,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:27:43,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:27:43,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:27:43,349 INFO L87 Difference]: Start difference. First operand 2437 states and 3757 transitions. Second operand 4 states. [2020-07-21 17:27:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:43,662 INFO L93 Difference]: Finished difference Result 7199 states and 11086 transitions. [2020-07-21 17:27:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:27:43,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 17:27:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:43,691 INFO L225 Difference]: With dead ends: 7199 [2020-07-21 17:27:43,691 INFO L226 Difference]: Without dead ends: 4777 [2020-07-21 17:27:43,699 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 17:27:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-07-21 17:27:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4653. [2020-07-21 17:27:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4653 states. [2020-07-21 17:27:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions. [2020-07-21 17:27:43,969 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 324 [2020-07-21 17:27:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:43,970 INFO L479 AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions. [2020-07-21 17:27:43,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions. [2020-07-21 17:27:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:27:43,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:43,990 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 17:27:44,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:44,203 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:44,204 INFO L82 PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times [2020-07-21 17:27:44,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:44,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083188655] [2020-07-21 17:27:44,205 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 17:27:44,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:44,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:44,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083188655] [2020-07-21 17:27:44,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:44,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:44,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99500590] [2020-07-21 17:27:44,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:44,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:44,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:44,773 INFO L87 Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 3 states. [2020-07-21 17:27:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:45,150 INFO L93 Difference]: Finished difference Result 13649 states and 20959 transitions. [2020-07-21 17:27:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:45,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:27:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:45,193 INFO L225 Difference]: With dead ends: 13649 [2020-07-21 17:27:45,193 INFO L226 Difference]: Without dead ends: 9125 [2020-07-21 17:27:45,202 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 17:27:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2020-07-21 17:27:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001. [2020-07-21 17:27:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9001 states. [2020-07-21 17:27:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions. [2020-07-21 17:27:45,514 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326 [2020-07-21 17:27:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:45,514 INFO L479 AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions. [2020-07-21 17:27:45,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions. [2020-07-21 17:27:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:27:45,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:45,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:45,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:45,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times [2020-07-21 17:27:45,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:45,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285531212] [2020-07-21 17:27:45,749 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 17:27:46,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:46,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:46,126 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 17:27:46,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:46,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285531212] [2020-07-21 17:27:46,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:46,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:46,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374918450] [2020-07-21 17:27:46,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:46,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:46,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:46,129 INFO L87 Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 3 states. [2020-07-21 17:27:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:46,725 INFO L93 Difference]: Finished difference Result 26926 states and 41282 transitions. [2020-07-21 17:27:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:46,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:27:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:46,808 INFO L225 Difference]: With dead ends: 26926 [2020-07-21 17:27:46,808 INFO L226 Difference]: Without dead ends: 17964 [2020-07-21 17:27:46,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17964 states. [2020-07-21 17:27:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17964 to 9015. [2020-07-21 17:27:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9015 states. [2020-07-21 17:27:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 13821 transitions. [2020-07-21 17:27:47,244 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 13821 transitions. Word has length 326 [2020-07-21 17:27:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:47,244 INFO L479 AbstractCegarLoop]: Abstraction has 9015 states and 13821 transitions. [2020-07-21 17:27:47,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 13821 transitions. [2020-07-21 17:27:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:27:47,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:47,265 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 17:27:47,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:47,481 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1384773422, now seen corresponding path program 1 times [2020-07-21 17:27:47,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:47,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099775266] [2020-07-21 17:27:47,482 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 17:27:47,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:47,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:47,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:47,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:48,050 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 17:27:48,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:48,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099775266] [2020-07-21 17:27:48,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:48,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:48,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954786994] [2020-07-21 17:27:48,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:48,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:48,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:48,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:48,054 INFO L87 Difference]: Start difference. First operand 9015 states and 13821 transitions. Second operand 3 states. [2020-07-21 17:27:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:48,500 INFO L93 Difference]: Finished difference Result 26948 states and 41312 transitions. [2020-07-21 17:27:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:48,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 17:27:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:48,537 INFO L225 Difference]: With dead ends: 26948 [2020-07-21 17:27:48,537 INFO L226 Difference]: Without dead ends: 17987 [2020-07-21 17:27:48,557 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 17:27:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17987 states. [2020-07-21 17:27:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17987 to 9038. [2020-07-21 17:27:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9038 states. [2020-07-21 17:27:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 13853 transitions. [2020-07-21 17:27:48,958 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 13853 transitions. Word has length 327 [2020-07-21 17:27:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:48,958 INFO L479 AbstractCegarLoop]: Abstraction has 9038 states and 13853 transitions. [2020-07-21 17:27:48,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 13853 transitions. [2020-07-21 17:27:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:27:48,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:48,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:49,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:49,193 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 588846425, now seen corresponding path program 1 times [2020-07-21 17:27:49,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:49,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886739941] [2020-07-21 17:27:49,195 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 17:27:49,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:27:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:49,848 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 17:27:49,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:49,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886739941] [2020-07-21 17:27:49,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:49,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:27:49,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928782115] [2020-07-21 17:27:49,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:27:49,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:27:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:27:49,851 INFO L87 Difference]: Start difference. First operand 9038 states and 13853 transitions. Second operand 4 states. [2020-07-21 17:27:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:50,243 INFO L93 Difference]: Finished difference Result 18859 states and 28858 transitions. [2020-07-21 17:27:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:27:50,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 17:27:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:50,269 INFO L225 Difference]: With dead ends: 18859 [2020-07-21 17:27:50,269 INFO L226 Difference]: Without dead ends: 9613 [2020-07-21 17:27:50,294 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 17:27:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9613 states. [2020-07-21 17:27:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9613 to 9489. [2020-07-21 17:27:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9489 states. [2020-07-21 17:27:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9489 states to 9489 states and 14482 transitions. [2020-07-21 17:27:50,654 INFO L78 Accepts]: Start accepts. Automaton has 9489 states and 14482 transitions. Word has length 328 [2020-07-21 17:27:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:50,654 INFO L479 AbstractCegarLoop]: Abstraction has 9489 states and 14482 transitions. [2020-07-21 17:27:50,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 9489 states and 14482 transitions. [2020-07-21 17:27:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:27:50,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:50,673 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 17:27:50,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:50,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1703885917, now seen corresponding path program 1 times [2020-07-21 17:27:50,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:50,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45695042] [2020-07-21 17:27:50,888 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 17:27:51,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:51,797 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 17:27:51,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:51,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45695042] [2020-07-21 17:27:51,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:51,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:51,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101706464] [2020-07-21 17:27:51,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:51,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:51,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:51,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:51,800 INFO L87 Difference]: Start difference. First operand 9489 states and 14482 transitions. Second operand 3 states. [2020-07-21 17:27:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:52,177 INFO L93 Difference]: Finished difference Result 27887 states and 42467 transitions. [2020-07-21 17:27:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:52,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:27:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:52,214 INFO L225 Difference]: With dead ends: 27887 [2020-07-21 17:27:52,214 INFO L226 Difference]: Without dead ends: 18697 [2020-07-21 17:27:52,236 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 17:27:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18697 states. [2020-07-21 17:27:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18697 to 9519. [2020-07-21 17:27:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9519 states. [2020-07-21 17:27:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9519 states to 9519 states and 14517 transitions. [2020-07-21 17:27:52,675 INFO L78 Accepts]: Start accepts. Automaton has 9519 states and 14517 transitions. Word has length 330 [2020-07-21 17:27:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:52,675 INFO L479 AbstractCegarLoop]: Abstraction has 9519 states and 14517 transitions. [2020-07-21 17:27:52,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9519 states and 14517 transitions. [2020-07-21 17:27:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:27:52,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:52,696 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 17:27:52,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:52,911 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1406710539, now seen corresponding path program 1 times [2020-07-21 17:27:52,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:52,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693384358] [2020-07-21 17:27:52,913 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 17:27:53,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:53,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2215 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:53,449 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 17:27:53,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:53,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693384358] [2020-07-21 17:27:53,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:53,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:53,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563820132] [2020-07-21 17:27:53,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:53,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:53,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:53,452 INFO L87 Difference]: Start difference. First operand 9519 states and 14517 transitions. Second operand 3 states. [2020-07-21 17:27:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:53,872 INFO L93 Difference]: Finished difference Result 26711 states and 40615 transitions. [2020-07-21 17:27:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:53,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:27:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:53,900 INFO L225 Difference]: With dead ends: 26711 [2020-07-21 17:27:53,900 INFO L226 Difference]: Without dead ends: 17619 [2020-07-21 17:27:53,921 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 17:27:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17619 states. [2020-07-21 17:27:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17619 to 17495. [2020-07-21 17:27:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17495 states. [2020-07-21 17:27:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 26518 transitions. [2020-07-21 17:27:54,731 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 26518 transitions. Word has length 330 [2020-07-21 17:27:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:54,731 INFO L479 AbstractCegarLoop]: Abstraction has 17495 states and 26518 transitions. [2020-07-21 17:27:54,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 26518 transitions. [2020-07-21 17:27:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:27:54,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:54,752 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 17:27:54,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:54,960 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1502657294, now seen corresponding path program 1 times [2020-07-21 17:27:54,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:54,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479439052] [2020-07-21 17:27:54,963 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 17:27:55,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:55,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:27:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:55,373 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 17:27:55,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:55,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479439052] [2020-07-21 17:27:55,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:55,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:27:55,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377631532] [2020-07-21 17:27:55,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:27:55,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:27:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:27:55,375 INFO L87 Difference]: Start difference. First operand 17495 states and 26518 transitions. Second operand 4 states. [2020-07-21 17:27:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:56,504 INFO L93 Difference]: Finished difference Result 49814 states and 75279 transitions. [2020-07-21 17:27:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:27:56,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 17:27:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:56,550 INFO L225 Difference]: With dead ends: 49814 [2020-07-21 17:27:56,550 INFO L226 Difference]: Without dead ends: 33140 [2020-07-21 17:27:56,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 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 17:27:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33140 states. [2020-07-21 17:27:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33140 to 17767. [2020-07-21 17:27:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17767 states. [2020-07-21 17:27:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17767 states to 17767 states and 26948 transitions. [2020-07-21 17:27:57,233 INFO L78 Accepts]: Start accepts. Automaton has 17767 states and 26948 transitions. Word has length 330 [2020-07-21 17:27:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:57,233 INFO L479 AbstractCegarLoop]: Abstraction has 17767 states and 26948 transitions. [2020-07-21 17:27:57,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17767 states and 26948 transitions. [2020-07-21 17:27:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:27:57,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:57,250 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 17:27:57,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:57,456 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2005785361, now seen corresponding path program 1 times [2020-07-21 17:27:57,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:57,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630003994] [2020-07-21 17:27:57,460 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 17:27:57,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:57,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:27:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:58,096 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 17:27:58,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:58,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630003994] [2020-07-21 17:27:58,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:58,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:27:58,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480642238] [2020-07-21 17:27:58,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:27:58,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:27:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:27:58,100 INFO L87 Difference]: Start difference. First operand 17767 states and 26948 transitions. Second operand 9 states. [2020-07-21 17:28:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:08,872 INFO L93 Difference]: Finished difference Result 114203 states and 177150 transitions. [2020-07-21 17:28:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:28:08,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 330 [2020-07-21 17:28:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:09,041 INFO L225 Difference]: With dead ends: 114203 [2020-07-21 17:28:09,041 INFO L226 Difference]: Without dead ends: 109821 [2020-07-21 17:28:09,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:28:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109821 states. [2020-07-21 17:28:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109821 to 48215. [2020-07-21 17:28:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48215 states. [2020-07-21 17:28:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48215 states to 48215 states and 73655 transitions. [2020-07-21 17:28:11,770 INFO L78 Accepts]: Start accepts. Automaton has 48215 states and 73655 transitions. Word has length 330 [2020-07-21 17:28:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:11,771 INFO L479 AbstractCegarLoop]: Abstraction has 48215 states and 73655 transitions. [2020-07-21 17:28:11,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:28:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 48215 states and 73655 transitions. [2020-07-21 17:28:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:28:11,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:11,797 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 17:28:11,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:11,998 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:11,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1559994321, now seen corresponding path program 1 times [2020-07-21 17:28:11,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:12,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85917883] [2020-07-21 17:28:12,000 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 17:28:12,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:12,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:28:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:12,702 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 17:28:12,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:12,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85917883] [2020-07-21 17:28:12,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:12,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:28:12,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902065557] [2020-07-21 17:28:12,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:28:12,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:28:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:28:12,706 INFO L87 Difference]: Start difference. First operand 48215 states and 73655 transitions. Second operand 8 states. [2020-07-21 17:28:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:18,083 INFO L93 Difference]: Finished difference Result 78126 states and 120335 transitions. [2020-07-21 17:28:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:28:18,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2020-07-21 17:28:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:18,147 INFO L225 Difference]: With dead ends: 78126 [2020-07-21 17:28:18,147 INFO L226 Difference]: Without dead ends: 52188 [2020-07-21 17:28:18,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 17:28:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52188 states. [2020-07-21 17:28:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52188 to 24369. [2020-07-21 17:28:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24369 states. [2020-07-21 17:28:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24369 states to 24369 states and 36642 transitions. [2020-07-21 17:28:19,706 INFO L78 Accepts]: Start accepts. Automaton has 24369 states and 36642 transitions. Word has length 330 [2020-07-21 17:28:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:19,707 INFO L479 AbstractCegarLoop]: Abstraction has 24369 states and 36642 transitions. [2020-07-21 17:28:19,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:28:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 24369 states and 36642 transitions. [2020-07-21 17:28:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:28:19,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:19,730 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 17:28:19,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:19,944 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1117202544, now seen corresponding path program 1 times [2020-07-21 17:28:19,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:19,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215557512] [2020-07-21 17:28:19,946 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 17:28:20,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:20,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215557512] [2020-07-21 17:28:20,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:20,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:20,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755979499] [2020-07-21 17:28:20,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:20,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:20,396 INFO L87 Difference]: Start difference. First operand 24369 states and 36642 transitions. Second operand 3 states. [2020-07-21 17:28:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:21,912 INFO L93 Difference]: Finished difference Result 54409 states and 81961 transitions. [2020-07-21 17:28:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:21,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:28:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:21,964 INFO L225 Difference]: With dead ends: 54409 [2020-07-21 17:28:21,964 INFO L226 Difference]: Without dead ends: 32627 [2020-07-21 17:28:21,992 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 17:28:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32627 states. [2020-07-21 17:28:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32627 to 27535. [2020-07-21 17:28:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27535 states. [2020-07-21 17:28:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27535 states to 27535 states and 41637 transitions. [2020-07-21 17:28:23,561 INFO L78 Accepts]: Start accepts. Automaton has 27535 states and 41637 transitions. Word has length 330 [2020-07-21 17:28:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:23,561 INFO L479 AbstractCegarLoop]: Abstraction has 27535 states and 41637 transitions. [2020-07-21 17:28:23,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27535 states and 41637 transitions. [2020-07-21 17:28:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:28:23,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:23,580 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 17:28:23,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:23,795 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 488749142, now seen corresponding path program 1 times [2020-07-21 17:28:23,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:23,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734549811] [2020-07-21 17:28:23,797 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 17:28:24,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:24,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:24,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:24,245 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 17:28:24,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:24,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734549811] [2020-07-21 17:28:24,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:24,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:24,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274810374] [2020-07-21 17:28:24,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:24,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:24,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:24,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:24,248 INFO L87 Difference]: Start difference. First operand 27535 states and 41637 transitions. Second operand 3 states. [2020-07-21 17:28:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:26,687 INFO L93 Difference]: Finished difference Result 67678 states and 102921 transitions. [2020-07-21 17:28:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:26,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:28:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:26,732 INFO L225 Difference]: With dead ends: 67678 [2020-07-21 17:28:26,732 INFO L226 Difference]: Without dead ends: 43162 [2020-07-21 17:28:26,753 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 17:28:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43162 states. [2020-07-21 17:28:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43162 to 36947. [2020-07-21 17:28:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36947 states. [2020-07-21 17:28:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36947 states to 36947 states and 56547 transitions. [2020-07-21 17:28:29,767 INFO L78 Accepts]: Start accepts. Automaton has 36947 states and 56547 transitions. Word has length 332 [2020-07-21 17:28:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:29,767 INFO L479 AbstractCegarLoop]: Abstraction has 36947 states and 56547 transitions. [2020-07-21 17:28:29,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 36947 states and 56547 transitions. [2020-07-21 17:28:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:28:29,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:29,781 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 17:28:29,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:29,982 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash -921502141, now seen corresponding path program 1 times [2020-07-21 17:28:29,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:29,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341785743] [2020-07-21 17:28:29,984 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 17:28:30,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:30,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:30,392 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 17:28:30,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:30,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341785743] [2020-07-21 17:28:30,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:30,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:30,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678235127] [2020-07-21 17:28:30,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:30,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:30,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:30,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:30,394 INFO L87 Difference]: Start difference. First operand 36947 states and 56547 transitions. Second operand 3 states. [2020-07-21 17:28:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:34,407 INFO L93 Difference]: Finished difference Result 108623 states and 165941 transitions. [2020-07-21 17:28:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:34,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:28:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:34,472 INFO L225 Difference]: With dead ends: 108623 [2020-07-21 17:28:34,473 INFO L226 Difference]: Without dead ends: 72795 [2020-07-21 17:28:34,495 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 17:28:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72795 states. [2020-07-21 17:28:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72795 to 37073. [2020-07-21 17:28:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37073 states. [2020-07-21 17:28:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37073 states to 37073 states and 56711 transitions. [2020-07-21 17:28:36,656 INFO L78 Accepts]: Start accepts. Automaton has 37073 states and 56711 transitions. Word has length 332 [2020-07-21 17:28:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:36,656 INFO L479 AbstractCegarLoop]: Abstraction has 37073 states and 56711 transitions. [2020-07-21 17:28:36,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 37073 states and 56711 transitions. [2020-07-21 17:28:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:28:36,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:36,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:36,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:36,872 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1129468009, now seen corresponding path program 1 times [2020-07-21 17:28:36,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:36,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202486326] [2020-07-21 17:28:36,874 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 17:28:37,213 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:37,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:28:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:37,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:37,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202486326] [2020-07-21 17:28:37,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:37,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:28:37,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220118142] [2020-07-21 17:28:37,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:28:37,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:28:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:28:37,497 INFO L87 Difference]: Start difference. First operand 37073 states and 56711 transitions. Second operand 4 states. [2020-07-21 17:28:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:40,504 INFO L93 Difference]: Finished difference Result 76132 states and 116194 transitions. [2020-07-21 17:28:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:28:40,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 17:28:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:40,545 INFO L225 Difference]: With dead ends: 76132 [2020-07-21 17:28:40,545 INFO L226 Difference]: Without dead ends: 38538 [2020-07-21 17:28:40,574 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 17:28:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38538 states. [2020-07-21 17:28:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38538 to 38406. [2020-07-21 17:28:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38406 states. [2020-07-21 17:28:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38406 states to 38406 states and 58393 transitions. [2020-07-21 17:28:43,874 INFO L78 Accepts]: Start accepts. Automaton has 38406 states and 58393 transitions. Word has length 333 [2020-07-21 17:28:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:43,874 INFO L479 AbstractCegarLoop]: Abstraction has 38406 states and 58393 transitions. [2020-07-21 17:28:43,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:28:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 38406 states and 58393 transitions. [2020-07-21 17:28:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:28:43,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:43,889 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 17:28:44,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:44,095 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 90779129, now seen corresponding path program 1 times [2020-07-21 17:28:44,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:44,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559860654] [2020-07-21 17:28:44,097 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 17:28:44,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:28:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:44,514 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 17:28:44,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:44,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559860654] [2020-07-21 17:28:44,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:44,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:28:44,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564462024] [2020-07-21 17:28:44,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:28:44,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:28:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:28:44,524 INFO L87 Difference]: Start difference. First operand 38406 states and 58393 transitions. Second operand 4 states. [2020-07-21 17:28:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:49,030 INFO L93 Difference]: Finished difference Result 113439 states and 172325 transitions. [2020-07-21 17:28:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:28:49,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 17:28:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:49,101 INFO L225 Difference]: With dead ends: 113439 [2020-07-21 17:28:49,101 INFO L226 Difference]: Without dead ends: 76378 [2020-07-21 17:28:49,133 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 17:28:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76378 states. [2020-07-21 17:28:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76378 to 39835. [2020-07-21 17:28:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39835 states. [2020-07-21 17:28:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39835 states to 39835 states and 60602 transitions. [2020-07-21 17:28:51,798 INFO L78 Accepts]: Start accepts. Automaton has 39835 states and 60602 transitions. Word has length 333 [2020-07-21 17:28:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:51,798 INFO L479 AbstractCegarLoop]: Abstraction has 39835 states and 60602 transitions. [2020-07-21 17:28:51,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:28:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 39835 states and 60602 transitions. [2020-07-21 17:28:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:28:51,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:51,814 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 17:28:52,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:52,015 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash -271563843, now seen corresponding path program 1 times [2020-07-21 17:28:52,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:52,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628740878] [2020-07-21 17:28:52,017 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 17:28:52,393 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:52,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:52,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:28:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:52,596 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 17:28:52,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:52,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628740878] [2020-07-21 17:28:52,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:52,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:28:52,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039845917] [2020-07-21 17:28:52,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:28:52,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:28:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:28:52,598 INFO L87 Difference]: Start difference. First operand 39835 states and 60602 transitions. Second operand 5 states. [2020-07-21 17:28:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:58,914 INFO L93 Difference]: Finished difference Result 94431 states and 145261 transitions. [2020-07-21 17:28:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:28:58,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-21 17:28:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:58,982 INFO L225 Difference]: With dead ends: 94431 [2020-07-21 17:28:58,982 INFO L226 Difference]: Without dead ends: 73301 [2020-07-21 17:28:59,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:28:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73301 states. [2020-07-21 17:29:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73301 to 73189. [2020-07-21 17:29:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73189 states. [2020-07-21 17:29:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73189 states to 73189 states and 111400 transitions. [2020-07-21 17:29:03,943 INFO L78 Accepts]: Start accepts. Automaton has 73189 states and 111400 transitions. Word has length 333 [2020-07-21 17:29:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:03,944 INFO L479 AbstractCegarLoop]: Abstraction has 73189 states and 111400 transitions. [2020-07-21 17:29:03,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:29:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 73189 states and 111400 transitions. [2020-07-21 17:29:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:29:03,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:03,972 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 17:29:04,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:04,173 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1184289703, now seen corresponding path program 1 times [2020-07-21 17:29:04,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:04,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861338522] [2020-07-21 17:29:04,175 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 17:29:04,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:04,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:29:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:04,558 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 17:29:04,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:04,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861338522] [2020-07-21 17:29:04,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:04,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:04,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874781706] [2020-07-21 17:29:04,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:04,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:04,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:04,560 INFO L87 Difference]: Start difference. First operand 73189 states and 111400 transitions. Second operand 3 states. [2020-07-21 17:29:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:15,016 INFO L93 Difference]: Finished difference Result 175992 states and 271489 transitions. [2020-07-21 17:29:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:15,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:29:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:15,162 INFO L225 Difference]: With dead ends: 175992 [2020-07-21 17:29:15,162 INFO L226 Difference]: Without dead ends: 134780 [2020-07-21 17:29:15,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134780 states. [2020-07-21 17:29:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134780 to 134778. [2020-07-21 17:29:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134778 states. [2020-07-21 17:29:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134778 states to 134778 states and 205658 transitions. [2020-07-21 17:29:27,225 INFO L78 Accepts]: Start accepts. Automaton has 134778 states and 205658 transitions. Word has length 333 [2020-07-21 17:29:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:27,225 INFO L479 AbstractCegarLoop]: Abstraction has 134778 states and 205658 transitions. [2020-07-21 17:29:27,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 134778 states and 205658 transitions. [2020-07-21 17:29:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:29:27,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:27,275 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 17:29:27,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:27,476 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 72101730, now seen corresponding path program 1 times [2020-07-21 17:29:27,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:27,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536211057] [2020-07-21 17:29:27,478 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 17:29:27,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:27,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:27,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:28,187 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 17:29:28,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:28,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536211057] [2020-07-21 17:29:28,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:28,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:28,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505159979] [2020-07-21 17:29:28,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:28,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:28,189 INFO L87 Difference]: Start difference. First operand 134778 states and 205658 transitions. Second operand 4 states. [2020-07-21 17:29:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:49,621 INFO L93 Difference]: Finished difference Result 396771 states and 605213 transitions. [2020-07-21 17:29:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:49,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 17:29:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:49,946 INFO L225 Difference]: With dead ends: 396771 [2020-07-21 17:29:49,946 INFO L226 Difference]: Without dead ends: 262442 [2020-07-21 17:29:50,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262442 states. [2020-07-21 17:30:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262442 to 262364. [2020-07-21 17:30:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262364 states. [2020-07-21 17:30:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262364 states to 262364 states and 397868 transitions. [2020-07-21 17:30:14,404 INFO L78 Accepts]: Start accepts. Automaton has 262364 states and 397868 transitions. Word has length 333 [2020-07-21 17:30:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:14,404 INFO L479 AbstractCegarLoop]: Abstraction has 262364 states and 397868 transitions. [2020-07-21 17:30:14,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:30:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 262364 states and 397868 transitions. [2020-07-21 17:30:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:30:14,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:14,497 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 17:30:14,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:14,698 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:14,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1687183020, now seen corresponding path program 1 times [2020-07-21 17:30:14,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:14,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752385279] [2020-07-21 17:30:14,700 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 17:30:15,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:15,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:15,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:15,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:15,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752385279] [2020-07-21 17:30:15,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:15,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:15,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212440412] [2020-07-21 17:30:15,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:15,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:15,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:15,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:15,194 INFO L87 Difference]: Start difference. First operand 262364 states and 397868 transitions. Second operand 3 states. [2020-07-21 17:31:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:31:01,933 INFO L93 Difference]: Finished difference Result 769633 states and 1167127 transitions. [2020-07-21 17:31:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:31:01,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 17:31:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:31:02,580 INFO L225 Difference]: With dead ends: 769633 [2020-07-21 17:31:02,580 INFO L226 Difference]: Without dead ends: 511208 [2020-07-21 17:31:02,765 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 17:31:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511208 states. [2020-07-21 17:31:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511208 to 511117. [2020-07-21 17:31:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511117 states. [2020-07-21 17:31:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511117 states to 511117 states and 771548 transitions. [2020-07-21 17:31:57,265 INFO L78 Accepts]: Start accepts. Automaton has 511117 states and 771548 transitions. Word has length 335 [2020-07-21 17:31:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:57,265 INFO L479 AbstractCegarLoop]: Abstraction has 511117 states and 771548 transitions. [2020-07-21 17:31:57,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:31:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 511117 states and 771548 transitions. [2020-07-21 17:31:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:31:57,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:57,472 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 17:31:57,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:57,674 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash -342425423, now seen corresponding path program 1 times [2020-07-21 17:31:57,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:57,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737617509] [2020-07-21 17:31:57,676 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 17:31:58,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:31:58,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:58,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:31:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:58,107 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 17:31:58,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:58,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737617509] [2020-07-21 17:31:58,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:58,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:31:58,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866755138] [2020-07-21 17:31:58,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:31:58,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:31:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:58,109 INFO L87 Difference]: Start difference. First operand 511117 states and 771548 transitions. Second operand 3 states. [2020-07-21 17:33:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:36,359 INFO L93 Difference]: Finished difference Result 1517602 states and 2290902 transitions. [2020-07-21 17:33:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:36,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:33:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:37,772 INFO L225 Difference]: With dead ends: 1517602 [2020-07-21 17:33:37,772 INFO L226 Difference]: Without dead ends: 1012244 [2020-07-21 17:33:38,128 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 17:33:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012244 states. [2020-07-21 17:34:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012244 to 510071. [2020-07-21 17:34:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510071 states. [2020-07-21 17:34:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510071 states to 510071 states and 769877 transitions. [2020-07-21 17:34:52,057 INFO L78 Accepts]: Start accepts. Automaton has 510071 states and 769877 transitions. Word has length 336 [2020-07-21 17:34:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:52,057 INFO L479 AbstractCegarLoop]: Abstraction has 510071 states and 769877 transitions. [2020-07-21 17:34:52,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:34:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 510071 states and 769877 transitions. [2020-07-21 17:34:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:34:52,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:52,292 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 17:34:52,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:52,494 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 425985936, now seen corresponding path program 1 times [2020-07-21 17:34:52,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:52,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119734974] [2020-07-21 17:34:52,496 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:52,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:34:52,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:34:52,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:52,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:52,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119734974] [2020-07-21 17:34:52,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:52,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:34:52,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655481205] [2020-07-21 17:34:52,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:34:52,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:52,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:34:52,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:34:52,901 INFO L87 Difference]: Start difference. First operand 510071 states and 769877 transitions. Second operand 4 states. [2020-07-21 17:36:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:33,176 INFO L93 Difference]: Finished difference Result 1516499 states and 2288832 transitions. [2020-07-21 17:36:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:36:33,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 17:36:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:34,679 INFO L225 Difference]: With dead ends: 1516499 [2020-07-21 17:36:34,679 INFO L226 Difference]: Without dead ends: 1013671 [2020-07-21 17:36:35,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 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 17:36:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013671 states. [2020-07-21 17:37:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013671 to 511579. [2020-07-21 17:37:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511579 states. [2020-07-21 17:37:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511579 states to 511579 states and 772190 transitions. [2020-07-21 17:37:53,028 INFO L78 Accepts]: Start accepts. Automaton has 511579 states and 772190 transitions. Word has length 336 [2020-07-21 17:37:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:37:53,028 INFO L479 AbstractCegarLoop]: Abstraction has 511579 states and 772190 transitions. [2020-07-21 17:37:53,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:37:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 511579 states and 772190 transitions. [2020-07-21 17:37:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:37:53,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:37:53,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:37:53,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:53,432 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:37:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:37:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1695419518, now seen corresponding path program 1 times [2020-07-21 17:37:53,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:37:53,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678489177] [2020-07-21 17:37:53,434 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:53,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:37:53,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:37:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:37:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:37:53,900 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 17:37:53,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:37:53,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678489177] [2020-07-21 17:37:53,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:37:53,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:37:53,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424888515] [2020-07-21 17:37:53,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:37:53,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:37:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:37:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:37:53,902 INFO L87 Difference]: Start difference. First operand 511579 states and 772190 transitions. Second operand 4 states. [2020-07-21 17:38:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:51,766 INFO L93 Difference]: Finished difference Result 989435 states and 1493325 transitions. [2020-07-21 17:38:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:38:51,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 17:38:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:52,450 INFO L225 Difference]: With dead ends: 989435 [2020-07-21 17:38:52,450 INFO L226 Difference]: Without dead ends: 483230 [2020-07-21 17:38:53,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 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 17:38:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483230 states.