/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:42:54,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:42:54,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:42:54,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:42:54,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:42:54,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:42:54,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:42:54,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:42:54,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:42:54,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:42:54,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:42:54,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:42:54,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:42:54,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:42:54,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:42:54,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:42:54,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:42:54,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:42:54,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:42:54,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:42:54,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:42:54,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:42:54,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:42:54,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:42:54,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:42:54,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:42:54,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:42:54,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:42:54,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:42:54,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:42:54,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:42:54,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:42:54,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:42:54,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:42:54,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:42:54,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:42:54,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:42:54,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:42:54,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:42:54,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:42:54,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:42:54,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:42:54,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:42:54,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:42:54,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:42:54,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:42:54,114 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:42:54,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:42:54,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:42:54,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:42:54,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:42:54,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:42:54,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:42:54,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:42:54,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:42:54,118 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:42:54,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:42:54,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:42:54,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:42:54,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:42:54,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:42:54,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:42:54,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:42:54,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:42:54,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:42:54,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:42:54,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:42:54,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:42:54,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:54,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:42:54,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:42:54,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:42:54,402 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:42:54,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:42:54,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:42:54,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:42:54,425 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:42:54,426 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 14:42:54,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9789df48/b59b341f193b4998a02f9e217e5fc1a5/FLAG22ad94b37 [2020-07-21 14:42:55,253 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:42:55,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 14:42:55,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9789df48/b59b341f193b4998a02f9e217e5fc1a5/FLAG22ad94b37 [2020-07-21 14:42:55,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9789df48/b59b341f193b4998a02f9e217e5fc1a5 [2020-07-21 14:42:55,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:42:55,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:42:55,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:42:55,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:42:55,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:42:55,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:42:55" (1/1) ... [2020-07-21 14:42:55,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4ffbd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:55, skipping insertion in model container [2020-07-21 14:42:55,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:42:55" (1/1) ... [2020-07-21 14:42:55,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:42:55,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:42:57,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:42:57,049 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:42:58,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:42:58,570 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:42:58,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58 WrapperNode [2020-07-21 14:42:58,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:42:58,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:42:58,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:42:58,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:42:58,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... [2020-07-21 14:42:58,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:42:58,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:42:58,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:42:58,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:42:58,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:42:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:42:58,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:42:58,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:42:58,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:42:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:42:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:42:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 14:42:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:42:58,890 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:42:58,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:42:58,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:42:58,890 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:42:58,891 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:42:58,891 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:42:58,891 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:42:58,891 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:42:58,891 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:42:58,892 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:42:58,892 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:42:58,892 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:42:58,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:42:58,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:42:58,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:43:03,097 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:43:03,098 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:43:03,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:03 BoogieIcfgContainer [2020-07-21 14:43:03,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:43:03,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:43:03,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:43:03,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:43:03,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:42:55" (1/3) ... [2020-07-21 14:43:03,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421848a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:03, skipping insertion in model container [2020-07-21 14:43:03,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:58" (2/3) ... [2020-07-21 14:43:03,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421848a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:03, skipping insertion in model container [2020-07-21 14:43:03,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:03" (3/3) ... [2020-07-21 14:43:03,122 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 14:43:03,132 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:43:03,139 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 14:43:03,152 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 14:43:03,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:43:03,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:43:03,180 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:43:03,180 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:43:03,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:43:03,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:43:03,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:43:03,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:43:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-21 14:43:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 14:43:03,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:03,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:03,270 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-21 14:43:03,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:03,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177995700] [2020-07-21 14:43:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:03,842 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:03,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:04,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:04,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177995700] [2020-07-21 14:43:04,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:04,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:04,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876183201] [2020-07-21 14:43:04,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:04,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:04,256 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-21 14:43:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:04,809 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2020-07-21 14:43:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:43:04,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 14:43:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:04,846 INFO L225 Difference]: With dead ends: 4125 [2020-07-21 14:43:04,847 INFO L226 Difference]: Without dead ends: 2741 [2020-07-21 14:43:04,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-07-21 14:43:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-07-21 14:43:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-07-21 14:43:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2020-07-21 14:43:05,038 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2020-07-21 14:43:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:05,039 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2020-07-21 14:43:05,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2020-07-21 14:43:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 14:43:05,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:05,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:05,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:05,271 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash -369254340, now seen corresponding path program 1 times [2020-07-21 14:43:05,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:05,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621177880] [2020-07-21 14:43:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:05,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:05,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:06,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:06,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621177880] [2020-07-21 14:43:06,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:06,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:06,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019065444] [2020-07-21 14:43:06,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:06,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:06,106 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 3 states. [2020-07-21 14:43:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:06,438 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2020-07-21 14:43:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:06,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 14:43:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:06,480 INFO L225 Difference]: With dead ends: 7793 [2020-07-21 14:43:06,480 INFO L226 Difference]: Without dead ends: 5319 [2020-07-21 14:43:06,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-07-21 14:43:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-07-21 14:43:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-07-21 14:43:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2020-07-21 14:43:06,813 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2020-07-21 14:43:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:06,820 INFO L479 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2020-07-21 14:43:06,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2020-07-21 14:43:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 14:43:06,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:06,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:07,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:07,058 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:07,059 INFO L82 PathProgramCache]: Analyzing trace with hash -567190772, now seen corresponding path program 1 times [2020-07-21 14:43:07,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:07,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695825799] [2020-07-21 14:43:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:07,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:07,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:07,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:07,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695825799] [2020-07-21 14:43:07,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:07,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:07,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113886844] [2020-07-21 14:43:07,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:07,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:07,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:07,591 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 3 states. [2020-07-21 14:43:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:07,949 INFO L93 Difference]: Finished difference Result 15707 states and 25620 transitions. [2020-07-21 14:43:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:07,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 14:43:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:08,014 INFO L225 Difference]: With dead ends: 15707 [2020-07-21 14:43:08,014 INFO L226 Difference]: Without dead ends: 10491 [2020-07-21 14:43:08,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2020-07-21 14:43:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5315. [2020-07-21 14:43:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-07-21 14:43:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8670 transitions. [2020-07-21 14:43:08,382 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8670 transitions. Word has length 476 [2020-07-21 14:43:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:08,382 INFO L479 AbstractCegarLoop]: Abstraction has 5315 states and 8670 transitions. [2020-07-21 14:43:08,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8670 transitions. [2020-07-21 14:43:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 14:43:08,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:08,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:08,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:08,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:08,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1389649697, now seen corresponding path program 1 times [2020-07-21 14:43:08,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:08,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702384882] [2020-07-21 14:43:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:09,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:09,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:09,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:09,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702384882] [2020-07-21 14:43:09,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:09,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:09,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759655631] [2020-07-21 14:43:09,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:09,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:09,186 INFO L87 Difference]: Start difference. First operand 5315 states and 8670 transitions. Second operand 4 states. [2020-07-21 14:43:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:09,847 INFO L93 Difference]: Finished difference Result 12557 states and 20624 transitions. [2020-07-21 14:43:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:09,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-21 14:43:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:09,886 INFO L225 Difference]: With dead ends: 12557 [2020-07-21 14:43:09,886 INFO L226 Difference]: Without dead ends: 6507 [2020-07-21 14:43:09,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2020-07-21 14:43:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 6456. [2020-07-21 14:43:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6456 states. [2020-07-21 14:43:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 10597 transitions. [2020-07-21 14:43:10,219 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 10597 transitions. Word has length 477 [2020-07-21 14:43:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:10,220 INFO L479 AbstractCegarLoop]: Abstraction has 6456 states and 10597 transitions. [2020-07-21 14:43:10,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 10597 transitions. [2020-07-21 14:43:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 14:43:10,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:10,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:10,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:10,452 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash 481621780, now seen corresponding path program 1 times [2020-07-21 14:43:10,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:10,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073083249] [2020-07-21 14:43:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:11,015 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:11,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:11,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073083249] [2020-07-21 14:43:11,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:11,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:11,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221354056] [2020-07-21 14:43:11,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:11,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:11,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:11,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:11,843 INFO L87 Difference]: Start difference. First operand 6456 states and 10597 transitions. Second operand 3 states. [2020-07-21 14:43:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:12,292 INFO L93 Difference]: Finished difference Result 18336 states and 29960 transitions. [2020-07-21 14:43:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:12,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 14:43:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:12,338 INFO L225 Difference]: With dead ends: 18336 [2020-07-21 14:43:12,339 INFO L226 Difference]: Without dead ends: 12588 [2020-07-21 14:43:12,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12588 states. [2020-07-21 14:43:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12588 to 12539. [2020-07-21 14:43:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12539 states. [2020-07-21 14:43:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 20486 transitions. [2020-07-21 14:43:12,996 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 20486 transitions. Word has length 479 [2020-07-21 14:43:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:12,997 INFO L479 AbstractCegarLoop]: Abstraction has 12539 states and 20486 transitions. [2020-07-21 14:43:12,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 20486 transitions. [2020-07-21 14:43:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 14:43:13,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:13,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:13,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:13,260 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1155855257, now seen corresponding path program 1 times [2020-07-21 14:43:13,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:13,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394055416] [2020-07-21 14:43:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:13,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:13,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:13,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:13,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394055416] [2020-07-21 14:43:13,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:13,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:13,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569713126] [2020-07-21 14:43:13,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:13,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:13,891 INFO L87 Difference]: Start difference. First operand 12539 states and 20486 transitions. Second operand 3 states. [2020-07-21 14:43:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:14,635 INFO L93 Difference]: Finished difference Result 37264 states and 60830 transitions. [2020-07-21 14:43:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:14,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 14:43:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:14,698 INFO L225 Difference]: With dead ends: 37264 [2020-07-21 14:43:14,698 INFO L226 Difference]: Without dead ends: 24904 [2020-07-21 14:43:14,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24904 states. [2020-07-21 14:43:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24904 to 12658. [2020-07-21 14:43:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12658 states. [2020-07-21 14:43:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12658 states to 12658 states and 20645 transitions. [2020-07-21 14:43:15,456 INFO L78 Accepts]: Start accepts. Automaton has 12658 states and 20645 transitions. Word has length 479 [2020-07-21 14:43:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:15,457 INFO L479 AbstractCegarLoop]: Abstraction has 12658 states and 20645 transitions. [2020-07-21 14:43:15,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 12658 states and 20645 transitions. [2020-07-21 14:43:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 14:43:15,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:15,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:15,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:15,703 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:15,704 INFO L82 PathProgramCache]: Analyzing trace with hash 132761062, now seen corresponding path program 1 times [2020-07-21 14:43:15,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:15,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948130275] [2020-07-21 14:43:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:16,040 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:16,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:16,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:16,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948130275] [2020-07-21 14:43:16,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:16,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:16,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395103328] [2020-07-21 14:43:16,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:16,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:16,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:16,210 INFO L87 Difference]: Start difference. First operand 12658 states and 20645 transitions. Second operand 3 states. [2020-07-21 14:43:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:16,965 INFO L93 Difference]: Finished difference Result 37516 states and 61179 transitions. [2020-07-21 14:43:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:16,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 14:43:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:17,034 INFO L225 Difference]: With dead ends: 37516 [2020-07-21 14:43:17,034 INFO L226 Difference]: Without dead ends: 25107 [2020-07-21 14:43:17,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25107 states. [2020-07-21 14:43:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25107 to 12861. [2020-07-21 14:43:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12861 states. [2020-07-21 14:43:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 20927 transitions. [2020-07-21 14:43:17,623 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 20927 transitions. Word has length 480 [2020-07-21 14:43:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:17,623 INFO L479 AbstractCegarLoop]: Abstraction has 12861 states and 20927 transitions. [2020-07-21 14:43:17,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 20927 transitions. [2020-07-21 14:43:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 14:43:17,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:17,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:17,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:17,864 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash 642676975, now seen corresponding path program 1 times [2020-07-21 14:43:17,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:17,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476933567] [2020-07-21 14:43:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:18,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:18,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:18,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:18,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476933567] [2020-07-21 14:43:18,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:18,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:18,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618162306] [2020-07-21 14:43:18,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:18,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:18,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:18,545 INFO L87 Difference]: Start difference. First operand 12861 states and 20927 transitions. Second operand 4 states. [2020-07-21 14:43:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:19,139 INFO L93 Difference]: Finished difference Result 30821 states and 50479 transitions. [2020-07-21 14:43:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:19,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-21 14:43:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:19,185 INFO L225 Difference]: With dead ends: 30821 [2020-07-21 14:43:19,186 INFO L226 Difference]: Without dead ends: 16213 [2020-07-21 14:43:19,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16213 states. [2020-07-21 14:43:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16213 to 16164. [2020-07-21 14:43:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16164 states. [2020-07-21 14:43:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16164 states to 16164 states and 26416 transitions. [2020-07-21 14:43:20,698 INFO L78 Accepts]: Start accepts. Automaton has 16164 states and 26416 transitions. Word has length 481 [2020-07-21 14:43:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:20,698 INFO L479 AbstractCegarLoop]: Abstraction has 16164 states and 26416 transitions. [2020-07-21 14:43:20,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16164 states and 26416 transitions. [2020-07-21 14:43:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 14:43:20,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:20,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:20,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:20,947 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 105349152, now seen corresponding path program 1 times [2020-07-21 14:43:20,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:20,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716025579] [2020-07-21 14:43:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:21,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:21,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:21,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:21,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:21,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716025579] [2020-07-21 14:43:21,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:21,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:21,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480908462] [2020-07-21 14:43:21,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:21,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:21,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:21,441 INFO L87 Difference]: Start difference. First operand 16164 states and 26416 transitions. Second operand 3 states. [2020-07-21 14:43:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:22,585 INFO L93 Difference]: Finished difference Result 44844 states and 73071 transitions. [2020-07-21 14:43:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:22,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 14:43:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:22,638 INFO L225 Difference]: With dead ends: 44844 [2020-07-21 14:43:22,638 INFO L226 Difference]: Without dead ends: 30514 [2020-07-21 14:43:22,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30514 states. [2020-07-21 14:43:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30514 to 16364. [2020-07-21 14:43:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16364 states. [2020-07-21 14:43:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16364 states to 16364 states and 26703 transitions. [2020-07-21 14:43:23,478 INFO L78 Accepts]: Start accepts. Automaton has 16364 states and 26703 transitions. Word has length 484 [2020-07-21 14:43:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:23,478 INFO L479 AbstractCegarLoop]: Abstraction has 16364 states and 26703 transitions. [2020-07-21 14:43:23,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16364 states and 26703 transitions. [2020-07-21 14:43:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 14:43:23,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:23,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:23,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:23,704 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash 40908921, now seen corresponding path program 1 times [2020-07-21 14:43:23,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:23,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566180704] [2020-07-21 14:43:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:24,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:24,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:24,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:24,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566180704] [2020-07-21 14:43:24,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:24,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:24,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476362765] [2020-07-21 14:43:24,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:24,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:24,162 INFO L87 Difference]: Start difference. First operand 16364 states and 26703 transitions. Second operand 3 states. [2020-07-21 14:43:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:24,981 INFO L93 Difference]: Finished difference Result 46260 states and 75364 transitions. [2020-07-21 14:43:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:24,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 14:43:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:25,015 INFO L225 Difference]: With dead ends: 46260 [2020-07-21 14:43:25,016 INFO L226 Difference]: Without dead ends: 31320 [2020-07-21 14:43:25,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31320 states. [2020-07-21 14:43:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31320 to 16542. [2020-07-21 14:43:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16542 states. [2020-07-21 14:43:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16542 states to 16542 states and 26960 transitions. [2020-07-21 14:43:25,614 INFO L78 Accepts]: Start accepts. Automaton has 16542 states and 26960 transitions. Word has length 484 [2020-07-21 14:43:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:25,614 INFO L479 AbstractCegarLoop]: Abstraction has 16542 states and 26960 transitions. [2020-07-21 14:43:25,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 16542 states and 26960 transitions. [2020-07-21 14:43:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 14:43:25,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:25,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:25,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:25,830 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash 11218692, now seen corresponding path program 1 times [2020-07-21 14:43:25,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:25,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413654659] [2020-07-21 14:43:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:26,200 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:26,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 14:43:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:26,309 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,346 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,377 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,515 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,572 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,620 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,624 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,625 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:26,630 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:27,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:27,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413654659] [2020-07-21 14:43:27,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:27,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 14:43:27,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456770507] [2020-07-21 14:43:27,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:43:27,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:43:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:43:27,549 INFO L87 Difference]: Start difference. First operand 16542 states and 26960 transitions. Second operand 12 states. [2020-07-21 14:43:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:32,566 INFO L93 Difference]: Finished difference Result 29093 states and 46271 transitions. [2020-07-21 14:43:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 14:43:32,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 485 [2020-07-21 14:43:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:32,592 INFO L225 Difference]: With dead ends: 29093 [2020-07-21 14:43:32,592 INFO L226 Difference]: Without dead ends: 27279 [2020-07-21 14:43:32,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-07-21 14:43:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27279 states. [2020-07-21 14:43:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27279 to 18116. [2020-07-21 14:43:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18116 states. [2020-07-21 14:43:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18116 states to 18116 states and 29287 transitions. [2020-07-21 14:43:33,346 INFO L78 Accepts]: Start accepts. Automaton has 18116 states and 29287 transitions. Word has length 485 [2020-07-21 14:43:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:33,347 INFO L479 AbstractCegarLoop]: Abstraction has 18116 states and 29287 transitions. [2020-07-21 14:43:33,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 14:43:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 18116 states and 29287 transitions. [2020-07-21 14:43:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 14:43:33,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:33,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:33,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:33,582 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:33,583 INFO L82 PathProgramCache]: Analyzing trace with hash -476587614, now seen corresponding path program 1 times [2020-07-21 14:43:33,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:33,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665205653] [2020-07-21 14:43:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:34,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:34,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2944 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:43:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:34,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:34,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665205653] [2020-07-21 14:43:34,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:34,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:34,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382475378] [2020-07-21 14:43:34,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:34,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:34,287 INFO L87 Difference]: Start difference. First operand 18116 states and 29287 transitions. Second operand 3 states. [2020-07-21 14:43:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:36,383 INFO L93 Difference]: Finished difference Result 32697 states and 51431 transitions. [2020-07-21 14:43:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:36,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 14:43:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:36,412 INFO L225 Difference]: With dead ends: 32697 [2020-07-21 14:43:36,412 INFO L226 Difference]: Without dead ends: 24618 [2020-07-21 14:43:36,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:36,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24618 states. [2020-07-21 14:43:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24618 to 24532. [2020-07-21 14:43:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24532 states. [2020-07-21 14:43:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24532 states to 24532 states and 38877 transitions. [2020-07-21 14:43:38,242 INFO L78 Accepts]: Start accepts. Automaton has 24532 states and 38877 transitions. Word has length 485 [2020-07-21 14:43:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:38,242 INFO L479 AbstractCegarLoop]: Abstraction has 24532 states and 38877 transitions. [2020-07-21 14:43:38,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 24532 states and 38877 transitions. [2020-07-21 14:43:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 14:43:38,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:38,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:38,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:38,483 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash 296961277, now seen corresponding path program 1 times [2020-07-21 14:43:38,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:38,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577824616] [2020-07-21 14:43:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:38,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 14:43:38,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:39,003 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-07-21 14:43:39,003 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:43:39,207 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:39,262 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 14:43:39,263 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 14:43:39,265 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 14:43:39,445 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:39,512 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:40,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:40,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577824616] [2020-07-21 14:43:40,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:40,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 14:43:40,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763625782] [2020-07-21 14:43:40,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 14:43:40,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 14:43:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 14:43:40,460 INFO L87 Difference]: Start difference. First operand 24532 states and 38877 transitions. Second operand 13 states. [2020-07-21 14:43:40,679 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-07-21 14:43:45,635 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-07-21 14:43:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:48,090 INFO L93 Difference]: Finished difference Result 34989 states and 55062 transitions. [2020-07-21 14:43:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 14:43:48,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 485 [2020-07-21 14:43:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:48,125 INFO L225 Difference]: With dead ends: 34989 [2020-07-21 14:43:48,125 INFO L226 Difference]: Without dead ends: 33003 [2020-07-21 14:43:48,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-07-21 14:43:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33003 states. [2020-07-21 14:43:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33003 to 26656. [2020-07-21 14:43:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26656 states. [2020-07-21 14:43:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26656 states to 26656 states and 41957 transitions. [2020-07-21 14:43:49,518 INFO L78 Accepts]: Start accepts. Automaton has 26656 states and 41957 transitions. Word has length 485 [2020-07-21 14:43:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:49,519 INFO L479 AbstractCegarLoop]: Abstraction has 26656 states and 41957 transitions. [2020-07-21 14:43:49,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 14:43:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 26656 states and 41957 transitions. [2020-07-21 14:43:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 14:43:49,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:49,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:49,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:49,746 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1379153896, now seen corresponding path program 1 times [2020-07-21 14:43:49,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:49,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480549682] [2020-07-21 14:43:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:50,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2943 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:50,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:50,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480549682] [2020-07-21 14:43:50,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:50,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:50,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617561296] [2020-07-21 14:43:50,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:50,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:50,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:50,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:50,471 INFO L87 Difference]: Start difference. First operand 26656 states and 41957 transitions. Second operand 4 states. [2020-07-21 14:43:53,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:53,298 INFO L93 Difference]: Finished difference Result 77372 states and 121721 transitions. [2020-07-21 14:43:53,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:53,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 14:43:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:53,355 INFO L225 Difference]: With dead ends: 77372 [2020-07-21 14:43:53,355 INFO L226 Difference]: Without dead ends: 51640 [2020-07-21 14:43:53,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51640 states. [2020-07-21 14:43:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51640 to 51538. [2020-07-21 14:43:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51538 states. [2020-07-21 14:43:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51538 states to 51538 states and 80712 transitions. [2020-07-21 14:43:57,061 INFO L78 Accepts]: Start accepts. Automaton has 51538 states and 80712 transitions. Word has length 485 [2020-07-21 14:43:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:57,062 INFO L479 AbstractCegarLoop]: Abstraction has 51538 states and 80712 transitions. [2020-07-21 14:43:57,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51538 states and 80712 transitions. [2020-07-21 14:43:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 14:43:57,103 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:57,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:57,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:57,305 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash 790607375, now seen corresponding path program 1 times [2020-07-21 14:43:57,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:57,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211565529] [2020-07-21 14:43:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:57,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:57,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:58,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:58,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211565529] [2020-07-21 14:43:58,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:58,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:58,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471413174] [2020-07-21 14:43:58,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:58,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:58,325 INFO L87 Difference]: Start difference. First operand 51538 states and 80712 transitions. Second operand 3 states. [2020-07-21 14:44:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:03,413 INFO L93 Difference]: Finished difference Result 149730 states and 234206 transitions. [2020-07-21 14:44:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:03,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 14:44:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:03,523 INFO L225 Difference]: With dead ends: 149730 [2020-07-21 14:44:03,523 INFO L226 Difference]: Without dead ends: 101114 [2020-07-21 14:44:03,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101114 states. [2020-07-21 14:44:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101114 to 101012. [2020-07-21 14:44:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101012 states. [2020-07-21 14:44:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101012 states to 101012 states and 157539 transitions. [2020-07-21 14:44:10,526 INFO L78 Accepts]: Start accepts. Automaton has 101012 states and 157539 transitions. Word has length 487 [2020-07-21 14:44:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:10,527 INFO L479 AbstractCegarLoop]: Abstraction has 101012 states and 157539 transitions. [2020-07-21 14:44:10,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 101012 states and 157539 transitions. [2020-07-21 14:44:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:10,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:10,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:10,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:10,812 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash 898222998, now seen corresponding path program 1 times [2020-07-21 14:44:10,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:10,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292174499] [2020-07-21 14:44:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:11,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:11,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:11,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:11,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292174499] [2020-07-21 14:44:11,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:11,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:11,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853420277] [2020-07-21 14:44:11,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:11,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:11,641 INFO L87 Difference]: Start difference. First operand 101012 states and 157539 transitions. Second operand 3 states. [2020-07-21 14:44:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:23,165 INFO L93 Difference]: Finished difference Result 300166 states and 467789 transitions. [2020-07-21 14:44:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:23,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 14:44:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:23,381 INFO L225 Difference]: With dead ends: 300166 [2020-07-21 14:44:23,381 INFO L226 Difference]: Without dead ends: 200554 [2020-07-21 14:44:23,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200554 states. [2020-07-21 14:44:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200554 to 101628. [2020-07-21 14:44:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101628 states. [2020-07-21 14:44:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101628 states to 101628 states and 158477 transitions. [2020-07-21 14:44:30,132 INFO L78 Accepts]: Start accepts. Automaton has 101628 states and 158477 transitions. Word has length 488 [2020-07-21 14:44:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:30,132 INFO L479 AbstractCegarLoop]: Abstraction has 101628 states and 158477 transitions. [2020-07-21 14:44:30,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 101628 states and 158477 transitions. [2020-07-21 14:44:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:30,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:30,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:30,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:30,415 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:30,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1471821691, now seen corresponding path program 1 times [2020-07-21 14:44:30,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:30,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409885585] [2020-07-21 14:44:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:30,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:30,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:30,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:30,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:30,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409885585] [2020-07-21 14:44:30,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:30,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:30,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676461790] [2020-07-21 14:44:30,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:30,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:30,863 INFO L87 Difference]: Start difference. First operand 101628 states and 158477 transitions. Second operand 3 states. [2020-07-21 14:44:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:43,244 INFO L93 Difference]: Finished difference Result 301454 states and 469749 transitions. [2020-07-21 14:44:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:43,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 14:44:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:43,609 INFO L225 Difference]: With dead ends: 301454 [2020-07-21 14:44:43,610 INFO L226 Difference]: Without dead ends: 201548 [2020-07-21 14:44:43,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201548 states. [2020-07-21 14:44:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201548 to 102510. [2020-07-21 14:44:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102510 states. [2020-07-21 14:44:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102510 states to 102510 states and 159723 transitions. [2020-07-21 14:44:50,607 INFO L78 Accepts]: Start accepts. Automaton has 102510 states and 159723 transitions. Word has length 488 [2020-07-21 14:44:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:50,607 INFO L479 AbstractCegarLoop]: Abstraction has 102510 states and 159723 transitions. [2020-07-21 14:44:50,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 102510 states and 159723 transitions. [2020-07-21 14:44:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 14:44:50,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:50,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:50,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:50,897 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1796754932, now seen corresponding path program 1 times [2020-07-21 14:44:50,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:50,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829844639] [2020-07-21 14:44:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:51,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:44:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:51,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:51,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829844639] [2020-07-21 14:44:51,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:51,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:44:51,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434532107] [2020-07-21 14:44:51,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:44:51,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:51,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:44:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:44:51,369 INFO L87 Difference]: Start difference. First operand 102510 states and 159723 transitions. Second operand 4 states. [2020-07-21 14:45:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:01,255 INFO L93 Difference]: Finished difference Result 242266 states and 380627 transitions. [2020-07-21 14:45:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:45:01,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-21 14:45:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:01,391 INFO L225 Difference]: With dead ends: 242266 [2020-07-21 14:45:01,391 INFO L226 Difference]: Without dead ends: 123512 [2020-07-21 14:45:01,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:45:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123512 states. [2020-07-21 14:45:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123512 to 123410. [2020-07-21 14:45:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123410 states. [2020-07-21 14:45:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123410 states to 123410 states and 193272 transitions. [2020-07-21 14:45:11,893 INFO L78 Accepts]: Start accepts. Automaton has 123410 states and 193272 transitions. Word has length 489 [2020-07-21 14:45:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:11,893 INFO L479 AbstractCegarLoop]: Abstraction has 123410 states and 193272 transitions. [2020-07-21 14:45:11,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:45:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 123410 states and 193272 transitions. [2020-07-21 14:45:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 14:45:11,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:11,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:45:12,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:12,199 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash 473150599, now seen corresponding path program 1 times [2020-07-21 14:45:12,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:12,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923923828] [2020-07-21 14:45:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:12,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:45:12,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:12,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:45:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:45:12,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:12,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923923828] [2020-07-21 14:45:12,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:12,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:45:12,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627517393] [2020-07-21 14:45:12,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:45:12,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:45:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:12,915 INFO L87 Difference]: Start difference. First operand 123410 states and 193272 transitions. Second operand 3 states. [2020-07-21 14:45:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:30,549 INFO L93 Difference]: Finished difference Result 354516 states and 554459 transitions. [2020-07-21 14:45:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:45:30,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 14:45:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:30,798 INFO L225 Difference]: With dead ends: 354516 [2020-07-21 14:45:30,799 INFO L226 Difference]: Without dead ends: 240908 [2020-07-21 14:45:30,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240908 states. [2020-07-21 14:45:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240908 to 240806. [2020-07-21 14:45:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240806 states. [2020-07-21 14:45:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240806 states to 240806 states and 375503 transitions. [2020-07-21 14:45:50,812 INFO L78 Accepts]: Start accepts. Automaton has 240806 states and 375503 transitions. Word has length 491 [2020-07-21 14:45:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:50,813 INFO L479 AbstractCegarLoop]: Abstraction has 240806 states and 375503 transitions. [2020-07-21 14:45:50,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:45:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 240806 states and 375503 transitions. [2020-07-21 14:45:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 14:45:51,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:51,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:45:51,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:51,291 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash -640627979, now seen corresponding path program 1 times [2020-07-21 14:45:51,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:51,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281472042] [2020-07-21 14:45:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:51,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:45:51,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:45:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:45:52,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:52,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281472042] [2020-07-21 14:45:52,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:52,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:45:52,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191910162] [2020-07-21 14:45:52,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:45:52,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:45:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:52,389 INFO L87 Difference]: Start difference. First operand 240806 states and 375503 transitions. Second operand 3 states. [2020-07-21 14:46:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:25,485 INFO L93 Difference]: Finished difference Result 714634 states and 1113757 transitions. [2020-07-21 14:46:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:25,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 14:46:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:26,042 INFO L225 Difference]: With dead ends: 714634 [2020-07-21 14:46:26,042 INFO L226 Difference]: Without dead ends: 478000 [2020-07-21 14:46:26,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478000 states. [2020-07-21 14:46:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478000 to 243648. [2020-07-21 14:46:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243648 states. [2020-07-21 14:46:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243648 states to 243648 states and 379451 transitions. [2020-07-21 14:46:52,544 INFO L78 Accepts]: Start accepts. Automaton has 243648 states and 379451 transitions. Word has length 492 [2020-07-21 14:46:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:52,545 INFO L479 AbstractCegarLoop]: Abstraction has 243648 states and 379451 transitions. [2020-07-21 14:46:52,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 243648 states and 379451 transitions. [2020-07-21 14:46:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 14:46:53,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:53,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:53,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:53,438 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 355656802, now seen corresponding path program 1 times [2020-07-21 14:46:53,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:53,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339691847] [2020-07-21 14:46:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:53,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:53,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:53,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:53,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339691847] [2020-07-21 14:46:53,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:53,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:53,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958288731] [2020-07-21 14:46:53,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:53,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:53,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:53,900 INFO L87 Difference]: Start difference. First operand 243648 states and 379451 transitions. Second operand 4 states. [2020-07-21 14:47:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:21,378 INFO L93 Difference]: Finished difference Result 595342 states and 935166 transitions. [2020-07-21 14:47:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:21,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 14:47:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:21,742 INFO L225 Difference]: With dead ends: 595342 [2020-07-21 14:47:21,743 INFO L226 Difference]: Without dead ends: 305732 [2020-07-21 14:47:21,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305732 states. [2020-07-21 14:47:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305732 to 305630. [2020-07-21 14:47:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305630 states. [2020-07-21 14:47:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305630 states to 305630 states and 478082 transitions. [2020-07-21 14:47:50,615 INFO L78 Accepts]: Start accepts. Automaton has 305630 states and 478082 transitions. Word has length 493 [2020-07-21 14:47:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:50,616 INFO L479 AbstractCegarLoop]: Abstraction has 305630 states and 478082 transitions. [2020-07-21 14:47:50,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 305630 states and 478082 transitions. [2020-07-21 14:47:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 14:47:50,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:50,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:51,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:51,106 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1980669542, now seen corresponding path program 1 times [2020-07-21 14:47:51,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:51,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027043216] [2020-07-21 14:47:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:51,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:51,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:51,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:51,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027043216] [2020-07-21 14:47:51,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:51,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:51,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592344202] [2020-07-21 14:47:51,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:51,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:51,568 INFO L87 Difference]: Start difference. First operand 305630 states and 478082 transitions. Second operand 4 states. [2020-07-21 14:48:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:38,774 INFO L93 Difference]: Finished difference Result 856118 states and 1333969 transitions. [2020-07-21 14:48:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:38,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-21 14:48:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:39,523 INFO L225 Difference]: With dead ends: 856118 [2020-07-21 14:48:39,523 INFO L226 Difference]: Without dead ends: 596546 [2020-07-21 14:48:39,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596546 states. [2020-07-21 14:49:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596546 to 343346. [2020-07-21 14:49:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343346 states. [2020-07-21 14:49:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343346 states to 343346 states and 541193 transitions. [2020-07-21 14:49:15,951 INFO L78 Accepts]: Start accepts. Automaton has 343346 states and 541193 transitions. Word has length 497 [2020-07-21 14:49:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:15,952 INFO L479 AbstractCegarLoop]: Abstraction has 343346 states and 541193 transitions. [2020-07-21 14:49:15,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:49:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 343346 states and 541193 transitions. [2020-07-21 14:49:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 14:49:16,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:16,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:16,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:16,520 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -525315937, now seen corresponding path program 1 times [2020-07-21 14:49:16,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:16,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108352377] [2020-07-21 14:49:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:17,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:49:17,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:17,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:17,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108352377] [2020-07-21 14:49:17,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:17,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:17,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138870934] [2020-07-21 14:49:17,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:17,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:17,266 INFO L87 Difference]: Start difference. First operand 343346 states and 541193 transitions. Second operand 3 states. [2020-07-21 14:50:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:09,336 INFO L93 Difference]: Finished difference Result 912520 states and 1430354 transitions. [2020-07-21 14:50:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:09,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 14:50:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:10,183 INFO L225 Difference]: With dead ends: 912520 [2020-07-21 14:50:10,183 INFO L226 Difference]: Without dead ends: 635206 [2020-07-21 14:50:10,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635206 states. [2020-07-21 14:51:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635206 to 635104. [2020-07-21 14:51:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635104 states. [2020-07-21 14:51:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635104 states to 635104 states and 994682 transitions. [2020-07-21 14:51:18,834 INFO L78 Accepts]: Start accepts. Automaton has 635104 states and 994682 transitions. Word has length 497 [2020-07-21 14:51:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:18,834 INFO L479 AbstractCegarLoop]: Abstraction has 635104 states and 994682 transitions. [2020-07-21 14:51:18,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:51:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 635104 states and 994682 transitions. [2020-07-21 14:51:21,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 14:51:21,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:21,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:51:21,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:21,298 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1893312214, now seen corresponding path program 1 times [2020-07-21 14:51:21,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:21,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675195936] [2020-07-21 14:51:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:21,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:51:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:21,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 14:51:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:21,831 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:51:21,947 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:51:22,200 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-07-21 14:51:22,594 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:51:22,716 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:51:22,723 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:51:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:51:23,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:23,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675195936] [2020-07-21 14:51:23,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:23,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-21 14:51:23,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356154203] [2020-07-21 14:51:23,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 14:51:23,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:23,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 14:51:23,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:51:23,364 INFO L87 Difference]: Start difference. First operand 635104 states and 994682 transitions. Second operand 11 states. [2020-07-21 14:52:00,231 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-07-21 14:52:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:52:28,624 INFO L93 Difference]: Finished difference Result 715472 states and 1113924 transitions. [2020-07-21 14:52:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 14:52:28,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 497 [2020-07-21 14:52:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:52:29,501 INFO L225 Difference]: With dead ends: 715472 [2020-07-21 14:52:29,501 INFO L226 Difference]: Without dead ends: 678950 [2020-07-21 14:52:29,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 480 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-07-21 14:52:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678950 states. [2020-07-21 14:53:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678950 to 641900. [2020-07-21 14:53:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641900 states. [2020-07-21 14:53:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641900 states to 641900 states and 1004382 transitions. [2020-07-21 14:53:35,601 INFO L78 Accepts]: Start accepts. Automaton has 641900 states and 1004382 transitions. Word has length 497 [2020-07-21 14:53:35,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:35,602 INFO L479 AbstractCegarLoop]: Abstraction has 641900 states and 1004382 transitions. [2020-07-21 14:53:35,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 14:53:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 641900 states and 1004382 transitions. [2020-07-21 14:53:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 14:53:36,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:36,378 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:53:36,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:36,585 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash 738964869, now seen corresponding path program 1 times [2020-07-21 14:53:36,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:36,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822001481] [2020-07-21 14:53:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:36,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:53:36,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 14:53:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:37,155 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 14:53:37,155 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:53:37,314 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:53:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:53:38,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:38,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822001481] [2020-07-21 14:53:38,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:38,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 14:53:38,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356198496] [2020-07-21 14:53:38,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:53:38,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:53:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:53:38,877 INFO L87 Difference]: Start difference. First operand 641900 states and 1004382 transitions. Second operand 12 states. [2020-07-21 14:53:39,001 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60