/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:22:21,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:22:21,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:22:21,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:22:21,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:22:21,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:22:21,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:22:21,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:22:21,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:22:21,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:22:21,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:22:21,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:22:21,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:22:21,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:22:21,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:22:21,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:22:21,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:22:21,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:22:21,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:22:21,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:22:21,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:22:21,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:22:21,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:22:21,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:22:21,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:22:21,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:22:21,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:22:21,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:22:21,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:22:22,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:22:22,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:22:22,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:22:22,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:22:22,037 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:22:22,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:22:22,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:22:22,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:22:22,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:22:22,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:22:22,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:22:22,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:22:22,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:22:22,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:22:22,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:22:22,041 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:22:22,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:22:22,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:22:22,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:22:22,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:22:22,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:22:22,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:22:22,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:22:22,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:22:22,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:22:22,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:22:22,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:22,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:22:22,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:22:22,045 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 -> NOT_INCREMENTALLY [2020-07-21 12:22:22,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:22:22,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:22:22,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:22:22,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:22:22,355 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:22:22,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:22:22,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d991367/6edd3fe486b24d13889e6f73f88729ec/FLAG30e9e1ba5 [2020-07-21 12:22:23,075 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:22:23,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:22:23,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d991367/6edd3fe486b24d13889e6f73f88729ec/FLAG30e9e1ba5 [2020-07-21 12:22:23,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78d991367/6edd3fe486b24d13889e6f73f88729ec [2020-07-21 12:22:23,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:22:23,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:22:23,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:22:23,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:22:23,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:22:23,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:22:23" (1/1) ... [2020-07-21 12:22:23,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b08588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:23, skipping insertion in model container [2020-07-21 12:22:23,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:22:23" (1/1) ... [2020-07-21 12:22:23,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:22:23,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:22:24,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:22:24,494 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:22:25,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:22:25,125 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:22:25,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25 WrapperNode [2020-07-21 12:22:25,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:22:25,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:22:25,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:22:25,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:22:25,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... [2020-07-21 12:22:25,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:22:25,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:22:25,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:22:25,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:22:25,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:22:25,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:22:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:22:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:22:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:22:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:22:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:22:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 12:22:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:22:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:22:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:22:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:22:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:22:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:22:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:22:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:22:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:22:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:22:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:22:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:22:28,315 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:22:28,315 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:22:28,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:22:28 BoogieIcfgContainer [2020-07-21 12:22:28,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:22:28,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:22:28,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:22:28,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:22:28,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:22:23" (1/3) ... [2020-07-21 12:22:28,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62290ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:22:28, skipping insertion in model container [2020-07-21 12:22:28,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:22:25" (2/3) ... [2020-07-21 12:22:28,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62290ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:22:28, skipping insertion in model container [2020-07-21 12:22:28,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:22:28" (3/3) ... [2020-07-21 12:22:28,344 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:22:28,355 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:22:28,366 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:22:28,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:22:28,409 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:22:28,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:22:28,410 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:22:28,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:22:28,410 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:22:28,410 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:22:28,410 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:22:28,411 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:22:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-21 12:22:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:22:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:28,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:28,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-21 12:22:28,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:28,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716310231] [2020-07-21 12:22:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:22:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:29,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:29,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716310231] [2020-07-21 12:22:29,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:29,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:29,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84182034] [2020-07-21 12:22:29,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:29,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:29,262 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 3 states. [2020-07-21 12:22:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:29,528 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-21 12:22:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:29,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:22:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:29,575 INFO L225 Difference]: With dead ends: 1489 [2020-07-21 12:22:29,576 INFO L226 Difference]: Without dead ends: 1273 [2020-07-21 12:22:29,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-21 12:22:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-21 12:22:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-21 12:22:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-21 12:22:29,790 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-21 12:22:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:29,792 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-21 12:22:29,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-21 12:22:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:22:29,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:29,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:30,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:30,018 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:30,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:30,019 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-21 12:22:30,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:30,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605181316] [2020-07-21 12:22:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:30,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:22:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:30,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:30,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605181316] [2020-07-21 12:22:30,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:30,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:30,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252758942] [2020-07-21 12:22:30,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:30,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:30,565 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 3 states. [2020-07-21 12:22:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:30,782 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-21 12:22:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:30,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:22:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:30,797 INFO L225 Difference]: With dead ends: 2607 [2020-07-21 12:22:30,798 INFO L226 Difference]: Without dead ends: 2225 [2020-07-21 12:22:30,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-21 12:22:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-21 12:22:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-21 12:22:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-21 12:22:30,892 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-21 12:22:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:30,893 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-21 12:22:30,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-21 12:22:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:22:30,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:30,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:31,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:31,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-21 12:22:31,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:31,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427145618] [2020-07-21 12:22:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:22:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:31,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:31,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427145618] [2020-07-21 12:22:31,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:31,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:31,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312551227] [2020-07-21 12:22:31,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:31,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:31,620 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 3 states. [2020-07-21 12:22:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:31,935 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-21 12:22:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:31,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:22:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:31,966 INFO L225 Difference]: With dead ends: 4715 [2020-07-21 12:22:31,967 INFO L226 Difference]: Without dead ends: 4049 [2020-07-21 12:22:31,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-21 12:22:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-21 12:22:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-21 12:22:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-21 12:22:32,155 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-21 12:22:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:32,156 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-21 12:22:32,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-21 12:22:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:22:32,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:32,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:32,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:32,384 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-21 12:22:32,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:32,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462236253] [2020-07-21 12:22:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:22:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:33,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:33,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462236253] [2020-07-21 12:22:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:33,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:22:33,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233279814] [2020-07-21 12:22:33,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:22:33,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:22:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:22:33,184 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 4 states. [2020-07-21 12:22:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:33,761 INFO L93 Difference]: Finished difference Result 12001 states and 18571 transitions. [2020-07-21 12:22:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:22:33,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 12:22:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:33,805 INFO L225 Difference]: With dead ends: 12001 [2020-07-21 12:22:33,805 INFO L226 Difference]: Without dead ends: 7967 [2020-07-21 12:22:33,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:22:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2020-07-21 12:22:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 7965. [2020-07-21 12:22:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2020-07-21 12:22:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12270 transitions. [2020-07-21 12:22:34,215 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12270 transitions. Word has length 326 [2020-07-21 12:22:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:34,218 INFO L479 AbstractCegarLoop]: Abstraction has 7965 states and 12270 transitions. [2020-07-21 12:22:34,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:22:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12270 transitions. [2020-07-21 12:22:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:22:34,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:34,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:34,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:34,457 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:34,458 INFO L82 PathProgramCache]: Analyzing trace with hash -806411643, now seen corresponding path program 1 times [2020-07-21 12:22:34,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:34,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473695251] [2020-07-21 12:22:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:34,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:35,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:35,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473695251] [2020-07-21 12:22:35,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:35,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:35,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470520419] [2020-07-21 12:22:35,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:35,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:35,082 INFO L87 Difference]: Start difference. First operand 7965 states and 12270 transitions. Second operand 3 states. [2020-07-21 12:22:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:35,629 INFO L93 Difference]: Finished difference Result 23423 states and 36009 transitions. [2020-07-21 12:22:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:35,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 12:22:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:35,699 INFO L225 Difference]: With dead ends: 23423 [2020-07-21 12:22:35,700 INFO L226 Difference]: Without dead ends: 15598 [2020-07-21 12:22:35,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2020-07-21 12:22:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 15596. [2020-07-21 12:22:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15596 states. [2020-07-21 12:22:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15596 states to 15596 states and 23874 transitions. [2020-07-21 12:22:36,458 INFO L78 Accepts]: Start accepts. Automaton has 15596 states and 23874 transitions. Word has length 328 [2020-07-21 12:22:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:36,458 INFO L479 AbstractCegarLoop]: Abstraction has 15596 states and 23874 transitions. [2020-07-21 12:22:36,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 15596 states and 23874 transitions. [2020-07-21 12:22:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:22:36,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:36,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:36,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:36,705 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1426419210, now seen corresponding path program 1 times [2020-07-21 12:22:36,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:36,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202121922] [2020-07-21 12:22:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:37,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:37,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202121922] [2020-07-21 12:22:37,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:37,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:37,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502520373] [2020-07-21 12:22:37,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:37,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:37,209 INFO L87 Difference]: Start difference. First operand 15596 states and 23874 transitions. Second operand 3 states. [2020-07-21 12:22:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:37,794 INFO L93 Difference]: Finished difference Result 46629 states and 71346 transitions. [2020-07-21 12:22:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:37,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 12:22:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:37,876 INFO L225 Difference]: With dead ends: 46629 [2020-07-21 12:22:37,876 INFO L226 Difference]: Without dead ends: 31060 [2020-07-21 12:22:37,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31060 states. [2020-07-21 12:22:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31060 to 15607. [2020-07-21 12:22:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15607 states. [2020-07-21 12:22:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15607 states to 15607 states and 23889 transitions. [2020-07-21 12:22:39,500 INFO L78 Accepts]: Start accepts. Automaton has 15607 states and 23889 transitions. Word has length 328 [2020-07-21 12:22:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:39,501 INFO L479 AbstractCegarLoop]: Abstraction has 15607 states and 23889 transitions. [2020-07-21 12:22:39,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 15607 states and 23889 transitions. [2020-07-21 12:22:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 12:22:39,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:39,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:39,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:39,748 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1038980822, now seen corresponding path program 1 times [2020-07-21 12:22:39,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:39,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061477073] [2020-07-21 12:22:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:40,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:40,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061477073] [2020-07-21 12:22:40,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:40,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:40,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645871144] [2020-07-21 12:22:40,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:40,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:40,165 INFO L87 Difference]: Start difference. First operand 15607 states and 23889 transitions. Second operand 3 states. [2020-07-21 12:22:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:41,087 INFO L93 Difference]: Finished difference Result 46726 states and 71513 transitions. [2020-07-21 12:22:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:41,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 12:22:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:41,161 INFO L225 Difference]: With dead ends: 46726 [2020-07-21 12:22:41,161 INFO L226 Difference]: Without dead ends: 31169 [2020-07-21 12:22:41,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31169 states. [2020-07-21 12:22:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31169 to 15623. [2020-07-21 12:22:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-07-21 12:22:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23908 transitions. [2020-07-21 12:22:41,892 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23908 transitions. Word has length 329 [2020-07-21 12:22:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:41,892 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23908 transitions. [2020-07-21 12:22:41,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23908 transitions. [2020-07-21 12:22:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:22:41,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:41,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:42,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:42,137 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1758000128, now seen corresponding path program 1 times [2020-07-21 12:22:42,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:42,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611163425] [2020-07-21 12:22:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:42,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:42,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611163425] [2020-07-21 12:22:42,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:42,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:42,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251453957] [2020-07-21 12:22:42,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:42,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:42,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:42,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:42,734 INFO L87 Difference]: Start difference. First operand 15623 states and 23908 transitions. Second operand 3 states. [2020-07-21 12:22:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:43,610 INFO L93 Difference]: Finished difference Result 45980 states and 70241 transitions. [2020-07-21 12:22:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:43,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:22:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:43,681 INFO L225 Difference]: With dead ends: 45980 [2020-07-21 12:22:43,681 INFO L226 Difference]: Without dead ends: 30554 [2020-07-21 12:22:43,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30554 states. [2020-07-21 12:22:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30554 to 30552. [2020-07-21 12:22:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30552 states. [2020-07-21 12:22:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30552 states to 30552 states and 46444 transitions. [2020-07-21 12:22:44,542 INFO L78 Accepts]: Start accepts. Automaton has 30552 states and 46444 transitions. Word has length 330 [2020-07-21 12:22:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:44,543 INFO L479 AbstractCegarLoop]: Abstraction has 30552 states and 46444 transitions. [2020-07-21 12:22:44,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 30552 states and 46444 transitions. [2020-07-21 12:22:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:22:44,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:44,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:44,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:44,787 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash -730946851, now seen corresponding path program 1 times [2020-07-21 12:22:44,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:44,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925353332] [2020-07-21 12:22:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:22:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:45,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:45,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925353332] [2020-07-21 12:22:45,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:45,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:22:45,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778761646] [2020-07-21 12:22:45,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:22:45,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:45,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:22:45,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:22:45,388 INFO L87 Difference]: Start difference. First operand 30552 states and 46444 transitions. Second operand 4 states. [2020-07-21 12:22:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:47,701 INFO L93 Difference]: Finished difference Result 87242 states and 132392 transitions. [2020-07-21 12:22:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:22:47,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 12:22:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:47,808 INFO L225 Difference]: With dead ends: 87242 [2020-07-21 12:22:47,808 INFO L226 Difference]: Without dead ends: 57196 [2020-07-21 12:22:47,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:22:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57196 states. [2020-07-21 12:22:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57196 to 30801. [2020-07-21 12:22:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30801 states. [2020-07-21 12:22:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30801 states to 30801 states and 46863 transitions. [2020-07-21 12:22:48,891 INFO L78 Accepts]: Start accepts. Automaton has 30801 states and 46863 transitions. Word has length 330 [2020-07-21 12:22:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:48,891 INFO L479 AbstractCegarLoop]: Abstraction has 30801 states and 46863 transitions. [2020-07-21 12:22:48,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:22:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30801 states and 46863 transitions. [2020-07-21 12:22:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 12:22:48,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:48,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:49,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:49,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 937296763, now seen corresponding path program 1 times [2020-07-21 12:22:49,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:49,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721713110] [2020-07-21 12:22:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:22:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:49,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:49,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721713110] [2020-07-21 12:22:49,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:49,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:22:49,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451110381] [2020-07-21 12:22:49,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:22:49,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:49,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:22:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:22:49,886 INFO L87 Difference]: Start difference. First operand 30801 states and 46863 transitions. Second operand 8 states. [2020-07-21 12:22:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:53,683 INFO L93 Difference]: Finished difference Result 96281 states and 148799 transitions. [2020-07-21 12:22:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:22:53,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-07-21 12:22:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:53,795 INFO L225 Difference]: With dead ends: 96281 [2020-07-21 12:22:53,796 INFO L226 Difference]: Without dead ends: 67515 [2020-07-21 12:22:53,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:22:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2020-07-21 12:22:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42117. [2020-07-21 12:22:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42117 states. [2020-07-21 12:22:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42117 states to 42117 states and 63927 transitions. [2020-07-21 12:22:56,822 INFO L78 Accepts]: Start accepts. Automaton has 42117 states and 63927 transitions. Word has length 331 [2020-07-21 12:22:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:56,822 INFO L479 AbstractCegarLoop]: Abstraction has 42117 states and 63927 transitions. [2020-07-21 12:22:56,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:22:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 42117 states and 63927 transitions. [2020-07-21 12:22:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 12:22:56,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:56,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:57,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:57,064 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1588208884, now seen corresponding path program 1 times [2020-07-21 12:22:57,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:57,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527880523] [2020-07-21 12:22:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:57,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:57,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:57,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527880523] [2020-07-21 12:22:57,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:57,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:57,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510877943] [2020-07-21 12:22:57,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:57,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:57,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:57,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:57,485 INFO L87 Difference]: Start difference. First operand 42117 states and 63927 transitions. Second operand 3 states. [2020-07-21 12:22:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:59,700 INFO L93 Difference]: Finished difference Result 96477 states and 147221 transitions. [2020-07-21 12:22:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:59,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 12:22:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:59,767 INFO L225 Difference]: With dead ends: 96477 [2020-07-21 12:22:59,767 INFO L226 Difference]: Without dead ends: 56115 [2020-07-21 12:22:59,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56115 states. [2020-07-21 12:23:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56115 to 50417. [2020-07-21 12:23:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50417 states. [2020-07-21 12:23:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50417 states to 50417 states and 77315 transitions. [2020-07-21 12:23:03,221 INFO L78 Accepts]: Start accepts. Automaton has 50417 states and 77315 transitions. Word has length 331 [2020-07-21 12:23:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:03,221 INFO L479 AbstractCegarLoop]: Abstraction has 50417 states and 77315 transitions. [2020-07-21 12:23:03,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50417 states and 77315 transitions. [2020-07-21 12:23:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:23:03,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:03,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:03,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:03,469 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:03,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1591586090, now seen corresponding path program 1 times [2020-07-21 12:23:03,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:03,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991711212] [2020-07-21 12:23:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:03,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:03,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:03,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991711212] [2020-07-21 12:23:03,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:03,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:03,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919649859] [2020-07-21 12:23:03,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:03,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:03,904 INFO L87 Difference]: Start difference. First operand 50417 states and 77315 transitions. Second operand 3 states. [2020-07-21 12:23:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:07,980 INFO L93 Difference]: Finished difference Result 149739 states and 229296 transitions. [2020-07-21 12:23:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:07,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 12:23:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:08,103 INFO L225 Difference]: With dead ends: 149739 [2020-07-21 12:23:08,103 INFO L226 Difference]: Without dead ends: 100085 [2020-07-21 12:23:08,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100085 states. [2020-07-21 12:23:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100085 to 50521. [2020-07-21 12:23:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50521 states. [2020-07-21 12:23:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50521 states to 50521 states and 77451 transitions. [2020-07-21 12:23:12,357 INFO L78 Accepts]: Start accepts. Automaton has 50521 states and 77451 transitions. Word has length 332 [2020-07-21 12:23:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:12,357 INFO L479 AbstractCegarLoop]: Abstraction has 50521 states and 77451 transitions. [2020-07-21 12:23:12,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 50521 states and 77451 transitions. [2020-07-21 12:23:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 12:23:12,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:12,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:12,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:12,579 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2104552222, now seen corresponding path program 1 times [2020-07-21 12:23:12,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:12,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032718448] [2020-07-21 12:23:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:12,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:12,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032718448] [2020-07-21 12:23:12,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:12,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:12,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826141530] [2020-07-21 12:23:12,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:12,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:12,999 INFO L87 Difference]: Start difference. First operand 50521 states and 77451 transitions. Second operand 3 states. [2020-07-21 12:23:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:17,082 INFO L93 Difference]: Finished difference Result 149872 states and 229461 transitions. [2020-07-21 12:23:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:17,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 12:23:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:17,184 INFO L225 Difference]: With dead ends: 149872 [2020-07-21 12:23:17,184 INFO L226 Difference]: Without dead ends: 100205 [2020-07-21 12:23:17,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100205 states. [2020-07-21 12:23:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100205 to 50663. [2020-07-21 12:23:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50663 states. [2020-07-21 12:23:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 77622 transitions. [2020-07-21 12:23:21,802 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 77622 transitions. Word has length 333 [2020-07-21 12:23:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:21,803 INFO L479 AbstractCegarLoop]: Abstraction has 50663 states and 77622 transitions. [2020-07-21 12:23:21,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 77622 transitions. [2020-07-21 12:23:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 12:23:21,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:21,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:22,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:22,049 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:22,049 INFO L82 PathProgramCache]: Analyzing trace with hash 11426176, now seen corresponding path program 1 times [2020-07-21 12:23:22,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:22,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647006976] [2020-07-21 12:23:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:22,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:22,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647006976] [2020-07-21 12:23:22,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:22,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:23:22,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156226773] [2020-07-21 12:23:22,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:23:22,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:22,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:23:22,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:23:22,521 INFO L87 Difference]: Start difference. First operand 50663 states and 77622 transitions. Second operand 5 states. [2020-07-21 12:23:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:25,307 INFO L93 Difference]: Finished difference Result 99341 states and 152183 transitions. [2020-07-21 12:23:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:23:25,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-21 12:23:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:25,359 INFO L225 Difference]: With dead ends: 99341 [2020-07-21 12:23:25,359 INFO L226 Difference]: Without dead ends: 50663 [2020-07-21 12:23:25,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:23:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2020-07-21 12:23:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2020-07-21 12:23:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50663 states. [2020-07-21 12:23:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 77122 transitions. [2020-07-21 12:23:27,908 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 77122 transitions. Word has length 334 [2020-07-21 12:23:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:27,908 INFO L479 AbstractCegarLoop]: Abstraction has 50663 states and 77122 transitions. [2020-07-21 12:23:27,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:23:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 77122 transitions. [2020-07-21 12:23:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 12:23:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:27,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:28,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:28,146 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash -468640859, now seen corresponding path program 1 times [2020-07-21 12:23:28,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:28,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617900374] [2020-07-21 12:23:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:28,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:28,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617900374] [2020-07-21 12:23:28,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:28,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:28,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305488881] [2020-07-21 12:23:28,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:28,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:28,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:28,602 INFO L87 Difference]: Start difference. First operand 50663 states and 77122 transitions. Second operand 4 states. [2020-07-21 12:23:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:33,297 INFO L93 Difference]: Finished difference Result 122927 states and 189724 transitions. [2020-07-21 12:23:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:33,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 12:23:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:33,416 INFO L225 Difference]: With dead ends: 122927 [2020-07-21 12:23:33,416 INFO L226 Difference]: Without dead ends: 96109 [2020-07-21 12:23:33,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96109 states. [2020-07-21 12:23:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96109 to 96107. [2020-07-21 12:23:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96107 states. [2020-07-21 12:23:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96107 states to 96107 states and 146342 transitions. [2020-07-21 12:23:40,823 INFO L78 Accepts]: Start accepts. Automaton has 96107 states and 146342 transitions. Word has length 334 [2020-07-21 12:23:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:40,824 INFO L479 AbstractCegarLoop]: Abstraction has 96107 states and 146342 transitions. [2020-07-21 12:23:40,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 96107 states and 146342 transitions. [2020-07-21 12:23:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 12:23:40,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:40,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:41,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:41,074 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash 114577969, now seen corresponding path program 1 times [2020-07-21 12:23:41,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:41,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196334381] [2020-07-21 12:23:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:41,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:41,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:41,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196334381] [2020-07-21 12:23:41,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:41,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:41,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427423530] [2020-07-21 12:23:41,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:41,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:41,777 INFO L87 Difference]: Start difference. First operand 96107 states and 146342 transitions. Second operand 4 states. [2020-07-21 12:23:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:47,214 INFO L93 Difference]: Finished difference Result 192542 states and 292996 transitions. [2020-07-21 12:23:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:47,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 12:23:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:47,328 INFO L225 Difference]: With dead ends: 192542 [2020-07-21 12:23:47,328 INFO L226 Difference]: Without dead ends: 96954 [2020-07-21 12:23:47,390 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 [2020-07-21 12:23:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96954 states. [2020-07-21 12:23:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96954 to 96031. [2020-07-21 12:23:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96031 states. [2020-07-21 12:23:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96031 states to 96031 states and 146207 transitions. [2020-07-21 12:23:55,536 INFO L78 Accepts]: Start accepts. Automaton has 96031 states and 146207 transitions. Word has length 334 [2020-07-21 12:23:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:55,536 INFO L479 AbstractCegarLoop]: Abstraction has 96031 states and 146207 transitions. [2020-07-21 12:23:55,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 96031 states and 146207 transitions. [2020-07-21 12:23:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:23:55,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:55,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:55,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:55,785 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash -434706177, now seen corresponding path program 1 times [2020-07-21 12:23:55,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:55,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169329912] [2020-07-21 12:23:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:56,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:56,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169329912] [2020-07-21 12:23:56,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:56,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:56,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369108129] [2020-07-21 12:23:56,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:56,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:56,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:56,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:56,262 INFO L87 Difference]: Start difference. First operand 96031 states and 146207 transitions. Second operand 4 states. [2020-07-21 12:24:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:06,471 INFO L93 Difference]: Finished difference Result 282882 states and 429964 transitions. [2020-07-21 12:24:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:06,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 12:24:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:06,701 INFO L225 Difference]: With dead ends: 282882 [2020-07-21 12:24:06,701 INFO L226 Difference]: Without dead ends: 186990 [2020-07-21 12:24:06,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:24:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186990 states. [2020-07-21 12:24:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186990 to 186922. [2020-07-21 12:24:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186922 states. [2020-07-21 12:24:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186922 states to 186922 states and 282331 transitions. [2020-07-21 12:24:22,384 INFO L78 Accepts]: Start accepts. Automaton has 186922 states and 282331 transitions. Word has length 336 [2020-07-21 12:24:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:22,384 INFO L479 AbstractCegarLoop]: Abstraction has 186922 states and 282331 transitions. [2020-07-21 12:24:22,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:24:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 186922 states and 282331 transitions. [2020-07-21 12:24:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 12:24:22,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:22,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:22,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:22,671 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1136607777, now seen corresponding path program 1 times [2020-07-21 12:24:22,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:22,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905429843] [2020-07-21 12:24:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:23,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:23,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905429843] [2020-07-21 12:24:23,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:23,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:23,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200851249] [2020-07-21 12:24:23,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:23,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:23,123 INFO L87 Difference]: Start difference. First operand 186922 states and 282331 transitions. Second operand 3 states. [2020-07-21 12:24:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:46,582 INFO L93 Difference]: Finished difference Result 553406 states and 836000 transitions. [2020-07-21 12:24:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:24:46,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 12:24:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:47,107 INFO L225 Difference]: With dead ends: 553406 [2020-07-21 12:24:47,107 INFO L226 Difference]: Without dead ends: 367092 [2020-07-21 12:24:47,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367092 states. [2020-07-21 12:25:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367092 to 367090. [2020-07-21 12:25:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367090 states. [2020-07-21 12:25:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367090 states to 367090 states and 552269 transitions. [2020-07-21 12:25:17,493 INFO L78 Accepts]: Start accepts. Automaton has 367090 states and 552269 transitions. Word has length 338 [2020-07-21 12:25:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:25:17,494 INFO L479 AbstractCegarLoop]: Abstraction has 367090 states and 552269 transitions. [2020-07-21 12:25:17,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:25:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 367090 states and 552269 transitions. [2020-07-21 12:25:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 12:25:17,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:25:17,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:25:17,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:17,890 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:25:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:25:17,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1425161252, now seen corresponding path program 1 times [2020-07-21 12:25:17,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:25:17,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131097789] [2020-07-21 12:25:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:25:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:25:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:25:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:25:18,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:25:18,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131097789] [2020-07-21 12:25:18,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:25:18,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:25:18,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957184595] [2020-07-21 12:25:18,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:25:18,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:25:18,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:25:18,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:18,310 INFO L87 Difference]: Start difference. First operand 367090 states and 552269 transitions. Second operand 3 states. [2020-07-21 12:26:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:11,175 INFO L93 Difference]: Finished difference Result 1100709 states and 1655876 transitions. [2020-07-21 12:26:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:11,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 12:26:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:12,337 INFO L225 Difference]: With dead ends: 1100709 [2020-07-21 12:26:12,338 INFO L226 Difference]: Without dead ends: 733815 [2020-07-21 12:26:12,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733815 states. [2020-07-21 12:26:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733815 to 367147. [2020-07-21 12:26:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367147 states. [2020-07-21 12:26:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367147 states to 367147 states and 552347 transitions. [2020-07-21 12:26:51,713 INFO L78 Accepts]: Start accepts. Automaton has 367147 states and 552347 transitions. Word has length 338 [2020-07-21 12:26:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:51,713 INFO L479 AbstractCegarLoop]: Abstraction has 367147 states and 552347 transitions. [2020-07-21 12:26:51,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 367147 states and 552347 transitions. [2020-07-21 12:26:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 12:26:52,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:52,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:53,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:53,028 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash 214411520, now seen corresponding path program 1 times [2020-07-21 12:26:53,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:53,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447937535] [2020-07-21 12:26:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:53,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:53,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447937535] [2020-07-21 12:26:53,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:53,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:53,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756201390] [2020-07-21 12:26:53,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:53,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:53,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:53,449 INFO L87 Difference]: Start difference. First operand 367147 states and 552347 transitions. Second operand 3 states. [2020-07-21 12:27:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:51,877 INFO L93 Difference]: Finished difference Result 1100912 states and 1656196 transitions. [2020-07-21 12:27:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:51,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 12:27:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:53,035 INFO L225 Difference]: With dead ends: 1100912 [2020-07-21 12:27:53,035 INFO L226 Difference]: Without dead ends: 733963 [2020-07-21 12:27:53,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733963 states. [2020-07-21 12:28:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733963 to 367249. [2020-07-21 12:28:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367249 states. [2020-07-21 12:28:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367249 states to 367249 states and 552491 transitions. [2020-07-21 12:28:35,758 INFO L78 Accepts]: Start accepts. Automaton has 367249 states and 552491 transitions. Word has length 339 [2020-07-21 12:28:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:28:35,758 INFO L479 AbstractCegarLoop]: Abstraction has 367249 states and 552491 transitions. [2020-07-21 12:28:35,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:28:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 367249 states and 552491 transitions. [2020-07-21 12:28:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 12:28:35,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:35,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:28:36,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:36,131 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:28:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:28:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1871380838, now seen corresponding path program 1 times [2020-07-21 12:28:36,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:28:36,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113249881] [2020-07-21 12:28:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:28:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:28:36,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:28:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:28:36,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:28:36,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113249881] [2020-07-21 12:28:36,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:28:36,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:28:36,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452000682] [2020-07-21 12:28:36,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:28:36,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:28:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:28:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:28:36,559 INFO L87 Difference]: Start difference. First operand 367249 states and 552491 transitions. Second operand 3 states. [2020-07-21 12:29:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:31,176 INFO L93 Difference]: Finished difference Result 1043071 states and 1568285 transitions. [2020-07-21 12:29:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:31,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-21 12:29:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:32,175 INFO L225 Difference]: With dead ends: 1043071 [2020-07-21 12:29:32,175 INFO L226 Difference]: Without dead ends: 678137 [2020-07-21 12:29:32,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678137 states. [2020-07-21 12:30:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678137 to 678135. [2020-07-21 12:30:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678135 states. [2020-07-21 12:30:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678135 states to 678135 states and 1014168 transitions. [2020-07-21 12:30:35,082 INFO L78 Accepts]: Start accepts. Automaton has 678135 states and 1014168 transitions. Word has length 340 [2020-07-21 12:30:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:35,082 INFO L479 AbstractCegarLoop]: Abstraction has 678135 states and 1014168 transitions. [2020-07-21 12:30:35,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:30:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 678135 states and 1014168 transitions. [2020-07-21 12:30:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 12:30:35,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:35,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:35,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:35,640 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1452643785, now seen corresponding path program 1 times [2020-07-21 12:30:35,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:35,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942669314] [2020-07-21 12:30:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:30:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:36,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:36,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942669314] [2020-07-21 12:30:36,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:36,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:30:36,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394514218] [2020-07-21 12:30:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:30:36,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:30:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:30:36,088 INFO L87 Difference]: Start difference. First operand 678135 states and 1014168 transitions. Second operand 4 states. [2020-07-21 12:32:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:27,893 INFO L93 Difference]: Finished difference Result 1981568 states and 2962001 transitions. [2020-07-21 12:32:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:32:27,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 12:32:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:30,202 INFO L225 Difference]: With dead ends: 1981568 [2020-07-21 12:32:30,202 INFO L226 Difference]: Without dead ends: 1309585 [2020-07-21 12:32:30,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:32:31,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309585 states. [2020-07-21 12:33:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309585 to 680859. [2020-07-21 12:33:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680859 states.