/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:05:43,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:05:43,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:05:43,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:05:43,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:05:43,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:05:43,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:05:43,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:05:43,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:05:43,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:05:43,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:05:43,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:05:43,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:05:43,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:05:43,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:05:43,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:05:43,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:05:43,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:05:43,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:05:43,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:05:43,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:05:43,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:05:43,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:05:43,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:05:43,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:05:43,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:05:43,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:05:43,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:05:43,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:05:43,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:05:43,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:05:43,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:05:43,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:05:43,993 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:05:43,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:05:43,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:05:43,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:05:43,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:05:43,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:05:43,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:05:43,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:05:43,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:05:43,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:05:43,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:05:43,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:05:43,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:05:43,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:05:43,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:05:43,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:05:43,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:05:43,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:05:43,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:05:43,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:05:43,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:05:43,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:05:43,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:43,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:05:43,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:05:43,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 15:05:44,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:05:44,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:05:44,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:05:44,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:05:44,306 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:05:44,307 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 15:05:44,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6058cf861/facf91bf2f9848f9aa2a040a18e41de6/FLAG1b0460ba4 [2020-07-20 15:05:44,970 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:05:44,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 15:05:45,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6058cf861/facf91bf2f9848f9aa2a040a18e41de6/FLAG1b0460ba4 [2020-07-20 15:05:45,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6058cf861/facf91bf2f9848f9aa2a040a18e41de6 [2020-07-20 15:05:45,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:05:45,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:05:45,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:05:45,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:05:45,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:05:45,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:05:45" (1/1) ... [2020-07-20 15:05:45,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d14c7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:45, skipping insertion in model container [2020-07-20 15:05:45,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:05:45" (1/1) ... [2020-07-20 15:05:45,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:05:45,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:05:46,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:05:46,390 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:05:46,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:05:46,944 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:05:46,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46 WrapperNode [2020-07-20 15:05:46,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:05:46,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:05:46,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:05:46,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:05:46,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:46,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:47,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:47,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:47,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:47,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:47,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... [2020-07-20 15:05:47,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:05:47,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:05:47,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:05:47,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:05:47,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:05:47,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:05:47,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:05:47,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:05:47,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:05:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:05:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:05:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:05:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:05:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:05:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:05:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:05:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:05:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:05:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:05:47,293 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:05:47,293 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:05:47,293 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:05:47,293 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:05:47,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:05:47,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:05:47,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:05:49,752 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:05:49,752 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:05:49,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:05:49 BoogieIcfgContainer [2020-07-20 15:05:49,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:05:49,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:05:49,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:05:49,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:05:49,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:05:45" (1/3) ... [2020-07-20 15:05:49,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a7c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:05:49, skipping insertion in model container [2020-07-20 15:05:49,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:05:46" (2/3) ... [2020-07-20 15:05:49,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a7c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:05:49, skipping insertion in model container [2020-07-20 15:05:49,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:05:49" (3/3) ... [2020-07-20 15:05:49,770 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 15:05:49,780 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:05:49,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 15:05:49,803 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 15:05:49,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:05:49,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:05:49,832 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:05:49,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:05:49,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:05:49,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:05:49,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:05:49,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:05:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 15:05:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 15:05:49,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:49,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:49,897 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 15:05:49,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:49,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518691946] [2020-07-20 15:05:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:50,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:50,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:50,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518691946] [2020-07-20 15:05:50,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:50,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:50,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639219006] [2020-07-20 15:05:50,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:50,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:50,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:50,724 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 15:05:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:51,058 INFO L93 Difference]: Finished difference Result 2328 states and 4137 transitions. [2020-07-20 15:05:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:05:51,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 15:05:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:51,086 INFO L225 Difference]: With dead ends: 2328 [2020-07-20 15:05:51,086 INFO L226 Difference]: Without dead ends: 1542 [2020-07-20 15:05:51,094 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 [2020-07-20 15:05:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-20 15:05:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1540. [2020-07-20 15:05:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1540 states. [2020-07-20 15:05:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2395 transitions. [2020-07-20 15:05:51,253 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2395 transitions. Word has length 324 [2020-07-20 15:05:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:51,255 INFO L479 AbstractCegarLoop]: Abstraction has 1540 states and 2395 transitions. [2020-07-20 15:05:51,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2395 transitions. [2020-07-20 15:05:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 15:05:51,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:51,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:51,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:51,485 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash 559759921, now seen corresponding path program 1 times [2020-07-20 15:05:51,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:51,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658623397] [2020-07-20 15:05:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:51,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:51,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:52,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:52,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658623397] [2020-07-20 15:05:52,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:52,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:52,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857299337] [2020-07-20 15:05:52,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:52,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:52,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:52,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:52,030 INFO L87 Difference]: Start difference. First operand 1540 states and 2395 transitions. Second operand 3 states. [2020-07-20 15:05:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:52,202 INFO L93 Difference]: Finished difference Result 4422 states and 6847 transitions. [2020-07-20 15:05:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:52,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 15:05:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:52,219 INFO L225 Difference]: With dead ends: 4422 [2020-07-20 15:05:52,219 INFO L226 Difference]: Without dead ends: 2984 [2020-07-20 15:05:52,224 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 [2020-07-20 15:05:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-07-20 15:05:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2982. [2020-07-20 15:05:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-07-20 15:05:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4607 transitions. [2020-07-20 15:05:52,342 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4607 transitions. Word has length 326 [2020-07-20 15:05:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:52,343 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 4607 transitions. [2020-07-20 15:05:52,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4607 transitions. [2020-07-20 15:05:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 15:05:52,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:52,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:52,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:52,567 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash 59250742, now seen corresponding path program 1 times [2020-07-20 15:05:52,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:52,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518630004] [2020-07-20 15:05:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:52,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:05:52,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:52,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:52,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518630004] [2020-07-20 15:05:52,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:52,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:52,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421055772] [2020-07-20 15:05:52,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:52,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:52,978 INFO L87 Difference]: Start difference. First operand 2982 states and 4607 transitions. Second operand 3 states. [2020-07-20 15:05:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:53,178 INFO L93 Difference]: Finished difference Result 8914 states and 13772 transitions. [2020-07-20 15:05:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:53,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 15:05:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:53,209 INFO L225 Difference]: With dead ends: 8914 [2020-07-20 15:05:53,210 INFO L226 Difference]: Without dead ends: 5947 [2020-07-20 15:05:53,217 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 [2020-07-20 15:05:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5947 states. [2020-07-20 15:05:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5947 to 2993. [2020-07-20 15:05:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2020-07-20 15:05:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4623 transitions. [2020-07-20 15:05:53,391 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4623 transitions. Word has length 326 [2020-07-20 15:05:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:53,391 INFO L479 AbstractCegarLoop]: Abstraction has 2993 states and 4623 transitions. [2020-07-20 15:05:53,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4623 transitions. [2020-07-20 15:05:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 15:05:53,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:53,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:53,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:53,616 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash -882201744, now seen corresponding path program 1 times [2020-07-20 15:05:53,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:53,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837440146] [2020-07-20 15:05:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:53,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:53,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:53,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:54,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:54,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837440146] [2020-07-20 15:05:54,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:54,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:54,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462112073] [2020-07-20 15:05:54,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:54,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:54,049 INFO L87 Difference]: Start difference. First operand 2993 states and 4623 transitions. Second operand 3 states. [2020-07-20 15:05:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:54,272 INFO L93 Difference]: Finished difference Result 8871 states and 13690 transitions. [2020-07-20 15:05:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:54,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 15:05:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:54,300 INFO L225 Difference]: With dead ends: 8871 [2020-07-20 15:05:54,300 INFO L226 Difference]: Without dead ends: 5908 [2020-07-20 15:05:54,308 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 [2020-07-20 15:05:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2020-07-20 15:05:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 3003. [2020-07-20 15:05:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-07-20 15:05:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4637 transitions. [2020-07-20 15:05:54,581 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4637 transitions. Word has length 327 [2020-07-20 15:05:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:54,581 INFO L479 AbstractCegarLoop]: Abstraction has 3003 states and 4637 transitions. [2020-07-20 15:05:54,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4637 transitions. [2020-07-20 15:05:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 15:05:54,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:54,591 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] [2020-07-20 15:05:54,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:54,806 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:54,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2128959444, now seen corresponding path program 1 times [2020-07-20 15:05:54,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:54,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598077742] [2020-07-20 15:05:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:55,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:55,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:55,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:55,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598077742] [2020-07-20 15:05:55,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:55,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:55,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699579272] [2020-07-20 15:05:55,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:55,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:55,208 INFO L87 Difference]: Start difference. First operand 3003 states and 4637 transitions. Second operand 3 states. [2020-07-20 15:05:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:55,599 INFO L93 Difference]: Finished difference Result 8613 states and 13241 transitions. [2020-07-20 15:05:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:55,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 15:05:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:55,626 INFO L225 Difference]: With dead ends: 8613 [2020-07-20 15:05:55,627 INFO L226 Difference]: Without dead ends: 5805 [2020-07-20 15:05:55,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2020-07-20 15:05:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5803. [2020-07-20 15:05:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2020-07-20 15:05:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 8898 transitions. [2020-07-20 15:05:55,869 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 8898 transitions. Word has length 328 [2020-07-20 15:05:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:55,870 INFO L479 AbstractCegarLoop]: Abstraction has 5803 states and 8898 transitions. [2020-07-20 15:05:55,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 8898 transitions. [2020-07-20 15:05:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 15:05:55,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:55,882 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] [2020-07-20 15:05:56,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:56,096 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1426305655, now seen corresponding path program 1 times [2020-07-20 15:05:56,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:56,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644028009] [2020-07-20 15:05:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:56,327 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:05:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:05:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:56,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:56,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644028009] [2020-07-20 15:05:56,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:56,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:56,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837138700] [2020-07-20 15:05:56,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:56,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:56,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:56,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:56,405 INFO L87 Difference]: Start difference. First operand 5803 states and 8898 transitions. Second operand 4 states. [2020-07-20 15:05:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:56,894 INFO L93 Difference]: Finished difference Result 16042 states and 24430 transitions. [2020-07-20 15:05:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:05:56,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 15:05:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:56,927 INFO L225 Difference]: With dead ends: 16042 [2020-07-20 15:05:56,927 INFO L226 Difference]: Without dead ends: 10685 [2020-07-20 15:05:56,939 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 [2020-07-20 15:05:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2020-07-20 15:05:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 6017. [2020-07-20 15:05:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6017 states. [2020-07-20 15:05:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 9262 transitions. [2020-07-20 15:05:57,209 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 9262 transitions. Word has length 328 [2020-07-20 15:05:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:57,209 INFO L479 AbstractCegarLoop]: Abstraction has 6017 states and 9262 transitions. [2020-07-20 15:05:57,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 9262 transitions. [2020-07-20 15:05:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 15:05:57,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:57,223 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] [2020-07-20 15:05:57,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:57,437 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash 730242313, now seen corresponding path program 1 times [2020-07-20 15:05:57,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:57,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709577626] [2020-07-20 15:05:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:57,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:05:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:57,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:57,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:57,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:57,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709577626] [2020-07-20 15:05:57,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:57,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:57,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678253804] [2020-07-20 15:05:57,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:57,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:57,814 INFO L87 Difference]: Start difference. First operand 6017 states and 9262 transitions. Second operand 3 states. [2020-07-20 15:05:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:58,229 INFO L93 Difference]: Finished difference Result 12717 states and 19608 transitions. [2020-07-20 15:05:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:58,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 15:05:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:58,249 INFO L225 Difference]: With dead ends: 12717 [2020-07-20 15:05:58,249 INFO L226 Difference]: Without dead ends: 8339 [2020-07-20 15:05:58,260 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 [2020-07-20 15:05:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2020-07-20 15:05:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 7001. [2020-07-20 15:05:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7001 states. [2020-07-20 15:05:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 10870 transitions. [2020-07-20 15:05:58,549 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 10870 transitions. Word has length 330 [2020-07-20 15:05:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:58,549 INFO L479 AbstractCegarLoop]: Abstraction has 7001 states and 10870 transitions. [2020-07-20 15:05:58,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 10870 transitions. [2020-07-20 15:05:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 15:05:58,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:58,563 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] [2020-07-20 15:05:58,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:58,778 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 858352887, now seen corresponding path program 1 times [2020-07-20 15:05:58,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:58,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733193185] [2020-07-20 15:05:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:59,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:05:59,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:59,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:05:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:59,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:59,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733193185] [2020-07-20 15:05:59,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:59,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:05:59,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748634210] [2020-07-20 15:05:59,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:05:59,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:05:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:05:59,082 INFO L87 Difference]: Start difference. First operand 7001 states and 10870 transitions. Second operand 3 states. [2020-07-20 15:05:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:59,517 INFO L93 Difference]: Finished difference Result 19711 states and 30314 transitions. [2020-07-20 15:05:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:05:59,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 15:05:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:59,555 INFO L225 Difference]: With dead ends: 19711 [2020-07-20 15:05:59,555 INFO L226 Difference]: Without dead ends: 13352 [2020-07-20 15:05:59,569 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 [2020-07-20 15:05:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13352 states. [2020-07-20 15:05:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13352 to 7098. [2020-07-20 15:05:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7098 states. [2020-07-20 15:05:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 11000 transitions. [2020-07-20 15:05:59,935 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 11000 transitions. Word has length 330 [2020-07-20 15:05:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:59,935 INFO L479 AbstractCegarLoop]: Abstraction has 7098 states and 11000 transitions. [2020-07-20 15:05:59,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:05:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 11000 transitions. [2020-07-20 15:05:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 15:05:59,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:59,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:00,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:00,163 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:00,164 INFO L82 PathProgramCache]: Analyzing trace with hash 903222164, now seen corresponding path program 1 times [2020-07-20 15:06:00,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:00,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731127496] [2020-07-20 15:06:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:00,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:00,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:00,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:00,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731127496] [2020-07-20 15:06:00,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:00,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:00,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634642969] [2020-07-20 15:06:00,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:00,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:00,485 INFO L87 Difference]: Start difference. First operand 7098 states and 11000 transitions. Second operand 4 states. [2020-07-20 15:06:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:00,987 INFO L93 Difference]: Finished difference Result 15731 states and 24295 transitions. [2020-07-20 15:06:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:00,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 15:06:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:01,009 INFO L225 Difference]: With dead ends: 15731 [2020-07-20 15:06:01,009 INFO L226 Difference]: Without dead ends: 7873 [2020-07-20 15:06:01,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7873 states. [2020-07-20 15:06:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7873 to 7871. [2020-07-20 15:06:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7871 states. [2020-07-20 15:06:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7871 states to 7871 states and 12095 transitions. [2020-07-20 15:06:01,367 INFO L78 Accepts]: Start accepts. Automaton has 7871 states and 12095 transitions. Word has length 331 [2020-07-20 15:06:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:01,367 INFO L479 AbstractCegarLoop]: Abstraction has 7871 states and 12095 transitions. [2020-07-20 15:06:01,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7871 states and 12095 transitions. [2020-07-20 15:06:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 15:06:01,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:01,379 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] [2020-07-20 15:06:01,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:01,593 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-20 15:06:01,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:01,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046789955] [2020-07-20 15:06:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:01,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:06:01,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:01,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:01,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046789955] [2020-07-20 15:06:01,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:01,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:06:01,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257370821] [2020-07-20 15:06:01,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:06:01,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:01,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:06:01,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:06:01,957 INFO L87 Difference]: Start difference. First operand 7871 states and 12095 transitions. Second operand 9 states. [2020-07-20 15:06:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:08,258 INFO L93 Difference]: Finished difference Result 40736 states and 63755 transitions. [2020-07-20 15:06:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 15:06:08,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 332 [2020-07-20 15:06:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:08,335 INFO L225 Difference]: With dead ends: 40736 [2020-07-20 15:06:08,335 INFO L226 Difference]: Without dead ends: 39030 [2020-07-20 15:06:08,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 15:06:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39030 states. [2020-07-20 15:06:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39030 to 18631. [2020-07-20 15:06:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-07-20 15:06:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 29021 transitions. [2020-07-20 15:06:09,340 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 29021 transitions. Word has length 332 [2020-07-20 15:06:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:09,341 INFO L479 AbstractCegarLoop]: Abstraction has 18631 states and 29021 transitions. [2020-07-20 15:06:09,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:06:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 29021 transitions. [2020-07-20 15:06:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 15:06:09,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:09,362 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] [2020-07-20 15:06:09,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:09,576 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1837398990, now seen corresponding path program 1 times [2020-07-20 15:06:09,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:09,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251554927] [2020-07-20 15:06:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:09,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:09,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:10,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:10,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251554927] [2020-07-20 15:06:10,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:10,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:10,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903684431] [2020-07-20 15:06:10,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:10,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:10,066 INFO L87 Difference]: Start difference. First operand 18631 states and 29021 transitions. Second operand 3 states. [2020-07-20 15:06:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:11,042 INFO L93 Difference]: Finished difference Result 42249 states and 66421 transitions. [2020-07-20 15:06:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:11,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 15:06:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:11,199 INFO L225 Difference]: With dead ends: 42249 [2020-07-20 15:06:11,199 INFO L226 Difference]: Without dead ends: 26173 [2020-07-20 15:06:11,226 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 [2020-07-20 15:06:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26173 states. [2020-07-20 15:06:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26173 to 23853. [2020-07-20 15:06:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23853 states. [2020-07-20 15:06:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23853 states to 23853 states and 37537 transitions. [2020-07-20 15:06:12,254 INFO L78 Accepts]: Start accepts. Automaton has 23853 states and 37537 transitions. Word has length 332 [2020-07-20 15:06:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:12,254 INFO L479 AbstractCegarLoop]: Abstraction has 23853 states and 37537 transitions. [2020-07-20 15:06:12,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23853 states and 37537 transitions. [2020-07-20 15:06:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 15:06:12,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:12,276 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] [2020-07-20 15:06:12,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:12,485 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:12,486 INFO L82 PathProgramCache]: Analyzing trace with hash 109236819, now seen corresponding path program 1 times [2020-07-20 15:06:12,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:12,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938047614] [2020-07-20 15:06:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:12,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:12,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:12,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938047614] [2020-07-20 15:06:12,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:12,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:12,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149600767] [2020-07-20 15:06:12,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:12,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:12,932 INFO L87 Difference]: Start difference. First operand 23853 states and 37537 transitions. Second operand 4 states. [2020-07-20 15:06:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:14,334 INFO L93 Difference]: Finished difference Result 35037 states and 55129 transitions. [2020-07-20 15:06:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:14,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 15:06:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:14,362 INFO L225 Difference]: With dead ends: 35037 [2020-07-20 15:06:14,363 INFO L226 Difference]: Without dead ends: 23890 [2020-07-20 15:06:14,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23890 states. [2020-07-20 15:06:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23890 to 23110. [2020-07-20 15:06:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23110 states. [2020-07-20 15:06:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23110 states to 23110 states and 36428 transitions. [2020-07-20 15:06:16,134 INFO L78 Accepts]: Start accepts. Automaton has 23110 states and 36428 transitions. Word has length 332 [2020-07-20 15:06:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:16,134 INFO L479 AbstractCegarLoop]: Abstraction has 23110 states and 36428 transitions. [2020-07-20 15:06:16,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 23110 states and 36428 transitions. [2020-07-20 15:06:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 15:06:16,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:16,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:16,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:16,348 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash -940905964, now seen corresponding path program 1 times [2020-07-20 15:06:16,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:16,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953844267] [2020-07-20 15:06:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:16,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:16,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:16,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:16,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:16,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953844267] [2020-07-20 15:06:16,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:16,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:16,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399627899] [2020-07-20 15:06:16,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:16,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:16,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:16,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:16,639 INFO L87 Difference]: Start difference. First operand 23110 states and 36428 transitions. Second operand 3 states. [2020-07-20 15:06:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:18,323 INFO L93 Difference]: Finished difference Result 68764 states and 108327 transitions. [2020-07-20 15:06:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:18,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 15:06:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:18,373 INFO L225 Difference]: With dead ends: 68764 [2020-07-20 15:06:18,373 INFO L226 Difference]: Without dead ends: 45898 [2020-07-20 15:06:18,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45898 states. [2020-07-20 15:06:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45898 to 23193. [2020-07-20 15:06:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23193 states. [2020-07-20 15:06:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23193 states to 23193 states and 36534 transitions. [2020-07-20 15:06:19,719 INFO L78 Accepts]: Start accepts. Automaton has 23193 states and 36534 transitions. Word has length 333 [2020-07-20 15:06:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:19,720 INFO L479 AbstractCegarLoop]: Abstraction has 23193 states and 36534 transitions. [2020-07-20 15:06:19,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 23193 states and 36534 transitions. [2020-07-20 15:06:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:06:19,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:19,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:19,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:19,930 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:19,930 INFO L82 PathProgramCache]: Analyzing trace with hash -967717922, now seen corresponding path program 1 times [2020-07-20 15:06:19,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:19,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134524161] [2020-07-20 15:06:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:20,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:20,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:06:20,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:20,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:20,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134524161] [2020-07-20 15:06:20,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:20,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:06:20,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587323448] [2020-07-20 15:06:20,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:06:20,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:06:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:06:20,304 INFO L87 Difference]: Start difference. First operand 23193 states and 36534 transitions. Second operand 9 states. [2020-07-20 15:06:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:29,974 INFO L93 Difference]: Finished difference Result 112010 states and 177918 transitions. [2020-07-20 15:06:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 15:06:29,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-20 15:06:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:30,093 INFO L225 Difference]: With dead ends: 112010 [2020-07-20 15:06:30,093 INFO L226 Difference]: Without dead ends: 103237 [2020-07-20 15:06:30,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 15:06:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103237 states. [2020-07-20 15:06:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103237 to 46924. [2020-07-20 15:06:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46924 states. [2020-07-20 15:06:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46924 states to 46924 states and 74282 transitions. [2020-07-20 15:06:32,919 INFO L78 Accepts]: Start accepts. Automaton has 46924 states and 74282 transitions. Word has length 334 [2020-07-20 15:06:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:32,920 INFO L479 AbstractCegarLoop]: Abstraction has 46924 states and 74282 transitions. [2020-07-20 15:06:32,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:06:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 46924 states and 74282 transitions. [2020-07-20 15:06:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:06:32,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:32,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:33,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:33,135 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:33,136 INFO L82 PathProgramCache]: Analyzing trace with hash -739154971, now seen corresponding path program 1 times [2020-07-20 15:06:33,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:33,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814440628] [2020-07-20 15:06:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:33,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:33,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:33,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:33,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814440628] [2020-07-20 15:06:33,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:33,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:33,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065279412] [2020-07-20 15:06:33,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:33,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:33,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:33,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:33,460 INFO L87 Difference]: Start difference. First operand 46924 states and 74282 transitions. Second operand 3 states. [2020-07-20 15:06:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:37,963 INFO L93 Difference]: Finished difference Result 113812 states and 181917 transitions. [2020-07-20 15:06:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:37,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 15:06:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:38,053 INFO L225 Difference]: With dead ends: 113812 [2020-07-20 15:06:38,053 INFO L226 Difference]: Without dead ends: 69033 [2020-07-20 15:06:38,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69033 states. [2020-07-20 15:06:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69033 to 64847. [2020-07-20 15:06:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64847 states. [2020-07-20 15:06:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64847 states to 64847 states and 102957 transitions. [2020-07-20 15:06:41,682 INFO L78 Accepts]: Start accepts. Automaton has 64847 states and 102957 transitions. Word has length 334 [2020-07-20 15:06:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:41,682 INFO L479 AbstractCegarLoop]: Abstraction has 64847 states and 102957 transitions. [2020-07-20 15:06:41,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 64847 states and 102957 transitions. [2020-07-20 15:06:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:06:41,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:41,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:41,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:41,911 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash -459285393, now seen corresponding path program 1 times [2020-07-20 15:06:41,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:41,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106417892] [2020-07-20 15:06:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:42,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:42,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:42,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:42,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106417892] [2020-07-20 15:06:42,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:42,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:42,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435587215] [2020-07-20 15:06:42,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:42,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:42,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:42,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:42,201 INFO L87 Difference]: Start difference. First operand 64847 states and 102957 transitions. Second operand 4 states. [2020-07-20 15:06:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:47,106 INFO L93 Difference]: Finished difference Result 93710 states and 148656 transitions. [2020-07-20 15:06:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:47,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 15:06:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:47,200 INFO L225 Difference]: With dead ends: 93710 [2020-07-20 15:06:47,201 INFO L226 Difference]: Without dead ends: 77751 [2020-07-20 15:06:47,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77751 states. [2020-07-20 15:06:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77751 to 65103. [2020-07-20 15:06:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65103 states. [2020-07-20 15:06:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65103 states to 65103 states and 103385 transitions. [2020-07-20 15:06:51,033 INFO L78 Accepts]: Start accepts. Automaton has 65103 states and 103385 transitions. Word has length 334 [2020-07-20 15:06:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:51,034 INFO L479 AbstractCegarLoop]: Abstraction has 65103 states and 103385 transitions. [2020-07-20 15:06:51,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65103 states and 103385 transitions. [2020-07-20 15:06:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 15:06:51,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:51,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:51,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:51,266 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1903152198, now seen corresponding path program 1 times [2020-07-20 15:06:51,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:51,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405488622] [2020-07-20 15:06:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:51,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:51,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:06:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:51,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:51,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405488622] [2020-07-20 15:06:51,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:51,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:51,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076541508] [2020-07-20 15:06:51,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:51,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:51,687 INFO L87 Difference]: Start difference. First operand 65103 states and 103385 transitions. Second operand 4 states. [2020-07-20 15:07:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:00,470 INFO L93 Difference]: Finished difference Result 192838 states and 306229 transitions. [2020-07-20 15:07:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:07:00,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 15:07:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:00,625 INFO L225 Difference]: With dead ends: 192838 [2020-07-20 15:07:00,625 INFO L226 Difference]: Without dead ends: 127836 [2020-07-20 15:07:00,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:07:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127836 states. [2020-07-20 15:07:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127836 to 127834. [2020-07-20 15:07:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127834 states. [2020-07-20 15:07:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127834 states to 127834 states and 202171 transitions. [2020-07-20 15:07:10,249 INFO L78 Accepts]: Start accepts. Automaton has 127834 states and 202171 transitions. Word has length 335 [2020-07-20 15:07:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:10,250 INFO L479 AbstractCegarLoop]: Abstraction has 127834 states and 202171 transitions. [2020-07-20 15:07:10,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:07:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 127834 states and 202171 transitions. [2020-07-20 15:07:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 15:07:10,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:10,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:07:10,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:10,474 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1033634768, now seen corresponding path program 1 times [2020-07-20 15:07:10,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:10,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950936998] [2020-07-20 15:07:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:10,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:07:10,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:07:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:11,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:11,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950936998] [2020-07-20 15:07:11,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:11,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:07:11,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191797601] [2020-07-20 15:07:11,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:07:11,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:11,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:07:11,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:11,101 INFO L87 Difference]: Start difference. First operand 127834 states and 202171 transitions. Second operand 3 states. [2020-07-20 15:07:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:27,920 INFO L93 Difference]: Finished difference Result 377249 states and 596742 transitions. [2020-07-20 15:07:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:07:27,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 15:07:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:28,235 INFO L225 Difference]: With dead ends: 377249 [2020-07-20 15:07:28,235 INFO L226 Difference]: Without dead ends: 250228 [2020-07-20 15:07:28,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250228 states. [2020-07-20 15:07:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250228 to 250226. [2020-07-20 15:07:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250226 states. [2020-07-20 15:07:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250226 states to 250226 states and 393837 transitions. [2020-07-20 15:07:48,436 INFO L78 Accepts]: Start accepts. Automaton has 250226 states and 393837 transitions. Word has length 337 [2020-07-20 15:07:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:48,437 INFO L479 AbstractCegarLoop]: Abstraction has 250226 states and 393837 transitions. [2020-07-20 15:07:48,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:07:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 250226 states and 393837 transitions. [2020-07-20 15:07:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 15:07:48,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:48,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:07:48,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:48,689 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash -646374453, now seen corresponding path program 1 times [2020-07-20 15:07:48,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:48,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999290943] [2020-07-20 15:07:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:48,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:07:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:07:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:48,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:48,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999290943] [2020-07-20 15:07:48,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:48,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:07:48,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973868310] [2020-07-20 15:07:48,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:07:48,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:07:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:48,981 INFO L87 Difference]: Start difference. First operand 250226 states and 393837 transitions. Second operand 3 states. [2020-07-20 15:08:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:24,656 INFO L93 Difference]: Finished difference Result 749390 states and 1179473 transitions. [2020-07-20 15:08:24,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:24,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 15:08:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:25,338 INFO L225 Difference]: With dead ends: 749390 [2020-07-20 15:08:25,338 INFO L226 Difference]: Without dead ends: 499560 [2020-07-20 15:08:25,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499560 states. [2020-07-20 15:08:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499560 to 250296. [2020-07-20 15:08:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250296 states. [2020-07-20 15:08:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250296 states to 250296 states and 393922 transitions. [2020-07-20 15:08:54,502 INFO L78 Accepts]: Start accepts. Automaton has 250296 states and 393922 transitions. Word has length 337 [2020-07-20 15:08:54,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:54,502 INFO L479 AbstractCegarLoop]: Abstraction has 250296 states and 393922 transitions. [2020-07-20 15:08:54,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 250296 states and 393922 transitions. [2020-07-20 15:08:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 15:08:54,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:54,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:54,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:54,755 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash -714080915, now seen corresponding path program 1 times [2020-07-20 15:08:54,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:54,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864367272] [2020-07-20 15:08:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:55,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:55,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:55,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:55,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864367272] [2020-07-20 15:08:55,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:55,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:55,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066560690] [2020-07-20 15:08:55,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:55,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:55,458 INFO L87 Difference]: Start difference. First operand 250296 states and 393922 transitions. Second operand 3 states. [2020-07-20 15:09:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:35,620 INFO L93 Difference]: Finished difference Result 749993 states and 1180371 transitions. [2020-07-20 15:09:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:09:35,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 15:09:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:36,366 INFO L225 Difference]: With dead ends: 749993 [2020-07-20 15:09:36,366 INFO L226 Difference]: Without dead ends: 500223 [2020-07-20 15:09:36,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500223 states. [2020-07-20 15:10:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500223 to 250404. [2020-07-20 15:10:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250404 states. [2020-07-20 15:10:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250404 states to 250404 states and 394072 transitions. [2020-07-20 15:10:06,003 INFO L78 Accepts]: Start accepts. Automaton has 250404 states and 394072 transitions. Word has length 338 [2020-07-20 15:10:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:06,003 INFO L479 AbstractCegarLoop]: Abstraction has 250404 states and 394072 transitions. [2020-07-20 15:10:06,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:10:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 250404 states and 394072 transitions. [2020-07-20 15:10:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 15:10:06,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:06,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:10:06,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:06,247 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:06,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1694012437, now seen corresponding path program 1 times [2020-07-20 15:10:06,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:06,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704443104] [2020-07-20 15:10:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:06,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:10:06,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:06,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:10:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:10:06,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:06,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704443104] [2020-07-20 15:10:06,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:06,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:10:06,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713185412] [2020-07-20 15:10:06,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:10:06,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:10:06,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:06,611 INFO L87 Difference]: Start difference. First operand 250404 states and 394072 transitions. Second operand 3 states. [2020-07-20 15:10:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:10:47,421 INFO L93 Difference]: Finished difference Result 735747 states and 1156821 transitions. [2020-07-20 15:10:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:10:47,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 15:10:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:10:48,308 INFO L225 Difference]: With dead ends: 735747 [2020-07-20 15:10:48,309 INFO L226 Difference]: Without dead ends: 488407 [2020-07-20 15:10:48,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488407 states. [2020-07-20 15:11:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488407 to 488405. [2020-07-20 15:11:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488405 states. [2020-07-20 15:11:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488405 states to 488405 states and 764723 transitions. [2020-07-20 15:11:36,671 INFO L78 Accepts]: Start accepts. Automaton has 488405 states and 764723 transitions. Word has length 339 [2020-07-20 15:11:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:36,672 INFO L479 AbstractCegarLoop]: Abstraction has 488405 states and 764723 transitions. [2020-07-20 15:11:36,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:11:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 488405 states and 764723 transitions. [2020-07-20 15:11:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 15:11:36,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:36,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:11:36,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:36,971 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash -590436520, now seen corresponding path program 1 times [2020-07-20 15:11:36,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:36,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523362695] [2020-07-20 15:11:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:37,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:11:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:37,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:11:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:37,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:37,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523362695] [2020-07-20 15:11:37,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:37,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:11:37,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040362469] [2020-07-20 15:11:37,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:11:37,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:11:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:11:37,290 INFO L87 Difference]: Start difference. First operand 488405 states and 764723 transitions. Second operand 4 states. [2020-07-20 15:13:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:03,216 INFO L93 Difference]: Finished difference Result 1397255 states and 2186078 transitions. [2020-07-20 15:13:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:13:03,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 15:13:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:04,762 INFO L225 Difference]: With dead ends: 1397255 [2020-07-20 15:13:04,762 INFO L226 Difference]: Without dead ends: 916193 [2020-07-20 15:13:05,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:13:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916193 states. [2020-07-20 15:14:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916193 to 492197. [2020-07-20 15:14:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492197 states. [2020-07-20 15:14:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492197 states to 492197 states and 770809 transitions. [2020-07-20 15:14:03,626 INFO L78 Accepts]: Start accepts. Automaton has 492197 states and 770809 transitions. Word has length 339 [2020-07-20 15:14:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:14:03,627 INFO L479 AbstractCegarLoop]: Abstraction has 492197 states and 770809 transitions. [2020-07-20 15:14:03,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:14:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 492197 states and 770809 transitions. [2020-07-20 15:14:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:14:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:14:03,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:14:03,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:03,939 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:14:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:14:03,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1350581619, now seen corresponding path program 1 times [2020-07-20 15:14:03,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:14:03,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106020184] [2020-07-20 15:14:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:04,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:14:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:14:04,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:14:04,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:14:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:14:04,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:14:04,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106020184] [2020-07-20 15:14:04,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:14:04,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:14:04,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786468408] [2020-07-20 15:14:04,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:14:04,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:14:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:14:04,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:14:04,252 INFO L87 Difference]: Start difference. First operand 492197 states and 770809 transitions. Second operand 3 states. [2020-07-20 15:15:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:15:41,486 INFO L93 Difference]: Finished difference Result 1454133 states and 2275890 transitions. [2020-07-20 15:15:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:15:41,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 15:15:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:15:43,316 INFO L225 Difference]: With dead ends: 1454133 [2020-07-20 15:15:43,317 INFO L226 Difference]: Without dead ends: 973242 [2020-07-20 15:15:43,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:15:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973242 states. [2020-07-20 15:16:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973242 to 493152. [2020-07-20 15:16:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493152 states. [2020-07-20 15:16:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493152 states to 493152 states and 772055 transitions. [2020-07-20 15:16:45,176 INFO L78 Accepts]: Start accepts. Automaton has 493152 states and 772055 transitions. Word has length 341 [2020-07-20 15:16:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:16:45,176 INFO L479 AbstractCegarLoop]: Abstraction has 493152 states and 772055 transitions. [2020-07-20 15:16:45,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:16:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 493152 states and 772055 transitions. [2020-07-20 15:16:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 15:16:45,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:16:45,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:16:45,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:16:45,476 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:16:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:16:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1605134628, now seen corresponding path program 1 times [2020-07-20 15:16:45,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:16:45,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949398787] [2020-07-20 15:16:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:16:45,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:16:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:16:45,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:16:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:16:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:16:45,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:16:45,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949398787] [2020-07-20 15:16:45,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:16:45,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:16:45,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118086544] [2020-07-20 15:16:45,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:16:45,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:16:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:16:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:16:45,801 INFO L87 Difference]: Start difference. First operand 493152 states and 772055 transitions. Second operand 4 states.