/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:26:15,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:26:15,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:26:15,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 06:26:15,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:26:15,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:26:15,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:26:15,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:26:15,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:26:15,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:26:15,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:26:15,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:26:15,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:26:15,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:26:15,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:26:15,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:26:15,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:26:15,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:26:15,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:26:15,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:26:15,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:26:15,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:26:15,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:26:15,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:26:15,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:26:15,940 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:26:15,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:26:15,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:26:15,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:26:15,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:26:15,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:26:15,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:26:15,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:26:15,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:26:15,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:26:15,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:26:15,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:26:15,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:26:15,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:26:15,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:26:15,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:26:15,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:26:15,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:26:15,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:26:15,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:26:15,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:26:15,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:26:15,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:26:15,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:26:15,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:26:15,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:26:16,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:26:16,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:26:16,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:26:16,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:26:16,251 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:26:16,252 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 06:26:16,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af41854cf/eadda4115611445a9db2e5f802e21a1c/FLAGbdfa4f6b6 [2020-07-20 06:26:16,999 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:26:17,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 06:26:17,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af41854cf/eadda4115611445a9db2e5f802e21a1c/FLAGbdfa4f6b6 [2020-07-20 06:26:17,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af41854cf/eadda4115611445a9db2e5f802e21a1c [2020-07-20 06:26:17,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:26:17,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:26:17,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:26:17,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:26:17,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:26:17,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:26:17" (1/1) ... [2020-07-20 06:26:17,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2067c2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:17, skipping insertion in model container [2020-07-20 06:26:17,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:26:17" (1/1) ... [2020-07-20 06:26:17,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:26:17,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:26:18,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:26:18,783 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:26:19,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:26:19,747 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:26:19,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19 WrapperNode [2020-07-20 06:26:19,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:26:19,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:26:19,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:26:19,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:26:19,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:19,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:19,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:19,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:19,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:19,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:19,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... [2020-07-20 06:26:20,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:26:20,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:26:20,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:26:20,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:26:20,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:26:20,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:26:20,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:26:20,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:26:20,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:26:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:26:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 06:26:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 06:26:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 06:26:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 06:26:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:26:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:26:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 06:26:20,074 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 06:26:20,074 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 06:26:20,074 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 06:26:20,074 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 06:26:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 06:26:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 06:26:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 06:26:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 06:26:20,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:26:20,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:26:20,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:26:23,958 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:26:23,958 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 06:26:23,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:26:23 BoogieIcfgContainer [2020-07-20 06:26:23,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:26:23,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:26:23,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:26:23,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:26:23,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:26:17" (1/3) ... [2020-07-20 06:26:23,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638973d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:26:23, skipping insertion in model container [2020-07-20 06:26:23,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:26:19" (2/3) ... [2020-07-20 06:26:23,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638973d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:26:23, skipping insertion in model container [2020-07-20 06:26:23,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:26:23" (3/3) ... [2020-07-20 06:26:23,979 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 06:26:23,990 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:26:23,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:26:24,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:26:24,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:26:24,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:26:24,042 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:26:24,042 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:26:24,042 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:26:24,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:26:24,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:26:24,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:26:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-20 06:26:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:26:24,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:24,132 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] [2020-07-20 06:26:24,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-20 06:26:24,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:24,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525205847] [2020-07-20 06:26:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:26:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:26,817 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:26:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:26:27,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525205847] [2020-07-20 06:26:27,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:26:27,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:26:27,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748932442] [2020-07-20 06:26:27,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:26:27,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:26:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:26:27,158 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-07-20 06:26:27,961 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-07-20 06:26:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:37,220 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-07-20 06:26:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:26:37,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-20 06:26:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:37,261 INFO L225 Difference]: With dead ends: 2262 [2020-07-20 06:26:37,262 INFO L226 Difference]: Without dead ends: 1993 [2020-07-20 06:26:37,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:26:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-07-20 06:26:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-07-20 06:26:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-07-20 06:26:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-07-20 06:26:37,428 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-07-20 06:26:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:37,430 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-07-20 06:26:37,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:26:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-07-20 06:26:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:26:37,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:37,448 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] [2020-07-20 06:26:37,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:26:37,449 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:37,450 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-07-20 06:26:37,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:37,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253049109] [2020-07-20 06:26:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:26:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:39,880 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:26:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:26:40,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253049109] [2020-07-20 06:26:40,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:26:40,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:26:40,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685104073] [2020-07-20 06:26:40,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:26:40,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:26:40,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:26:40,533 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-07-20 06:26:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:54,357 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-07-20 06:26:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:26:54,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-20 06:26:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:54,382 INFO L225 Difference]: With dead ends: 5904 [2020-07-20 06:26:54,383 INFO L226 Difference]: Without dead ends: 3930 [2020-07-20 06:26:54,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:26:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-07-20 06:26:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-07-20 06:26:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-07-20 06:26:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-07-20 06:26:54,542 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-07-20 06:26:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:54,543 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-07-20 06:26:54,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:26:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-07-20 06:26:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 06:26:54,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:54,553 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] [2020-07-20 06:26:54,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:26:54,554 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-20 06:26:54,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:54,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431302563] [2020-07-20 06:26:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:26:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:55,918 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:26:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:26:56,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431302563] [2020-07-20 06:26:56,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:26:56,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:26:56,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165187314] [2020-07-20 06:26:56,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:26:56,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:26:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:26:56,270 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-07-20 06:27:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:11,556 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-07-20 06:27:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:27:11,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-20 06:27:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:11,589 INFO L225 Difference]: With dead ends: 11482 [2020-07-20 06:27:11,590 INFO L226 Difference]: Without dead ends: 7768 [2020-07-20 06:27:11,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-07-20 06:27:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-07-20 06:27:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-07-20 06:27:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-07-20 06:27:11,910 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-07-20 06:27:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:11,911 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-07-20 06:27:11,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:27:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-07-20 06:27:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 06:27:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:11,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:27:11,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:27:11,934 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-20 06:27:11,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:11,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827593373] [2020-07-20 06:27:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:27:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:12,817 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:27:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:27:13,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827593373] [2020-07-20 06:27:13,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:27:13,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:27:13,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891240858] [2020-07-20 06:27:13,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:27:13,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:27:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:13,089 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states. [2020-07-20 06:27:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:28,978 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-07-20 06:27:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:27:28,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-20 06:27:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:29,031 INFO L225 Difference]: With dead ends: 23201 [2020-07-20 06:27:29,032 INFO L226 Difference]: Without dead ends: 15487 [2020-07-20 06:27:29,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-07-20 06:27:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-07-20 06:27:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-07-20 06:27:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-07-20 06:27:29,404 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-07-20 06:27:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:29,405 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-07-20 06:27:29,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:27:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-07-20 06:27:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 06:27:29,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:29,481 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] [2020-07-20 06:27:29,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 06:27:29,482 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-20 06:27:29,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:29,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225271932] [2020-07-20 06:27:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:27:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:30,573 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:27:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:27:30,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225271932] [2020-07-20 06:27:30,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:27:30,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:27:30,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887336433] [2020-07-20 06:27:30,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:27:30,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:27:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:30,862 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-07-20 06:27:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:47,119 INFO L93 Difference]: Finished difference Result 22716 states and 36476 transitions. [2020-07-20 06:27:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:27:47,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 06:27:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:47,151 INFO L225 Difference]: With dead ends: 22716 [2020-07-20 06:27:47,151 INFO L226 Difference]: Without dead ends: 15302 [2020-07-20 06:27:47,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2020-07-20 06:27:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15300. [2020-07-20 06:27:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15300 states. [2020-07-20 06:27:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15300 states to 15300 states and 24521 transitions. [2020-07-20 06:27:47,713 INFO L78 Accepts]: Start accepts. Automaton has 15300 states and 24521 transitions. Word has length 480 [2020-07-20 06:27:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:47,713 INFO L479 AbstractCegarLoop]: Abstraction has 15300 states and 24521 transitions. [2020-07-20 06:27:47,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:27:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 15300 states and 24521 transitions. [2020-07-20 06:27:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 06:27:47,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:47,740 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] [2020-07-20 06:27:47,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 06:27:47,741 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash -342175906, now seen corresponding path program 1 times [2020-07-20 06:27:47,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:47,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987488204] [2020-07-20 06:27:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:27:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:48,565 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:27:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:27:48,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987488204] [2020-07-20 06:27:48,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:27:48,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:27:48,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006850599] [2020-07-20 06:27:48,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:27:48,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:27:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:48,911 INFO L87 Difference]: Start difference. First operand 15300 states and 24521 transitions. Second operand 4 states. [2020-07-20 06:28:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:28:06,031 INFO L93 Difference]: Finished difference Result 45644 states and 73118 transitions. [2020-07-20 06:28:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:28:06,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 06:28:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:28:06,091 INFO L225 Difference]: With dead ends: 45644 [2020-07-20 06:28:06,091 INFO L226 Difference]: Without dead ends: 30488 [2020-07-20 06:28:06,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-07-20 06:28:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15398. [2020-07-20 06:28:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-07-20 06:28:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 24672 transitions. [2020-07-20 06:28:06,766 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 24672 transitions. Word has length 480 [2020-07-20 06:28:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:28:06,766 INFO L479 AbstractCegarLoop]: Abstraction has 15398 states and 24672 transitions. [2020-07-20 06:28:06,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:28:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 24672 transitions. [2020-07-20 06:28:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 06:28:06,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:28:06,791 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] [2020-07-20 06:28:06,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 06:28:06,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:28:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:28:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1081253375, now seen corresponding path program 1 times [2020-07-20 06:28:06,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:28:06,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647140460] [2020-07-20 06:28:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:28:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:07,765 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:28:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:28:07,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647140460] [2020-07-20 06:28:07,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:28:07,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:28:07,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214628372] [2020-07-20 06:28:07,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:28:07,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:28:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:07,996 INFO L87 Difference]: Start difference. First operand 15398 states and 24672 transitions. Second operand 4 states. [2020-07-20 06:28:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:28:25,795 INFO L93 Difference]: Finished difference Result 45779 states and 73299 transitions. [2020-07-20 06:28:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:28:25,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-20 06:28:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:28:25,838 INFO L225 Difference]: With dead ends: 45779 [2020-07-20 06:28:25,839 INFO L226 Difference]: Without dead ends: 30605 [2020-07-20 06:28:25,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-07-20 06:28:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15515. [2020-07-20 06:28:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2020-07-20 06:28:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 24818 transitions. [2020-07-20 06:28:26,828 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 24818 transitions. Word has length 481 [2020-07-20 06:28:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:28:26,828 INFO L479 AbstractCegarLoop]: Abstraction has 15515 states and 24818 transitions. [2020-07-20 06:28:26,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:28:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 24818 transitions. [2020-07-20 06:28:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 06:28:26,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:28:26,854 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] [2020-07-20 06:28:26,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 06:28:26,855 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:28:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:28:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1552601612, now seen corresponding path program 1 times [2020-07-20 06:28:26,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:28:26,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325993499] [2020-07-20 06:28:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:28:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:28,003 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:28:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:28:28,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325993499] [2020-07-20 06:28:28,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:28:28,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:28:28,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521516600] [2020-07-20 06:28:28,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:28:28,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:28,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:28:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:28,441 INFO L87 Difference]: Start difference. First operand 15515 states and 24818 transitions. Second operand 4 states. [2020-07-20 06:28:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:28:46,390 INFO L93 Difference]: Finished difference Result 44734 states and 71393 transitions. [2020-07-20 06:28:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:28:46,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-20 06:28:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:28:46,434 INFO L225 Difference]: With dead ends: 44734 [2020-07-20 06:28:46,434 INFO L226 Difference]: Without dead ends: 30188 [2020-07-20 06:28:46,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30188 states. [2020-07-20 06:28:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30188 to 30186. [2020-07-20 06:28:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2020-07-20 06:28:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 48059 transitions. [2020-07-20 06:28:47,659 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 48059 transitions. Word has length 482 [2020-07-20 06:28:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:28:47,660 INFO L479 AbstractCegarLoop]: Abstraction has 30186 states and 48059 transitions. [2020-07-20 06:28:47,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:28:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 48059 transitions. [2020-07-20 06:28:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 06:28:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:28:47,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:28:47,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 06:28:47,689 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:28:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:28:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104209, now seen corresponding path program 1 times [2020-07-20 06:28:47,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:28:47,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738538972] [2020-07-20 06:28:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:28:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:49,625 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:28:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:28:50,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738538972] [2020-07-20 06:28:50,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:28:50,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:28:50,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675039655] [2020-07-20 06:28:50,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:28:50,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:28:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:28:50,030 INFO L87 Difference]: Start difference. First operand 30186 states and 48059 transitions. Second operand 5 states. [2020-07-20 06:29:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:29:05,181 INFO L93 Difference]: Finished difference Result 67902 states and 108914 transitions. [2020-07-20 06:29:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:29:05,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 482 [2020-07-20 06:29:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:29:05,216 INFO L225 Difference]: With dead ends: 67902 [2020-07-20 06:29:05,217 INFO L226 Difference]: Without dead ends: 34534 [2020-07-20 06:29:05,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:29:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34534 states. [2020-07-20 06:29:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34534 to 34532. [2020-07-20 06:29:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34532 states. [2020-07-20 06:29:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34532 states to 34532 states and 55222 transitions. [2020-07-20 06:29:06,441 INFO L78 Accepts]: Start accepts. Automaton has 34532 states and 55222 transitions. Word has length 482 [2020-07-20 06:29:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:29:06,441 INFO L479 AbstractCegarLoop]: Abstraction has 34532 states and 55222 transitions. [2020-07-20 06:29:06,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:29:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 34532 states and 55222 transitions. [2020-07-20 06:29:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 06:29:06,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:29:06,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:29:06,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 06:29:06,479 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:29:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:29:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1612954702, now seen corresponding path program 1 times [2020-07-20 06:29:06,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:29:06,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003092705] [2020-07-20 06:29:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:29:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:08,746 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:29:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:29:09,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003092705] [2020-07-20 06:29:09,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:29:09,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:29:09,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577597917] [2020-07-20 06:29:09,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:29:09,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:29:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:29:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:29:09,020 INFO L87 Difference]: Start difference. First operand 34532 states and 55222 transitions. Second operand 4 states. [2020-07-20 06:29:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:29:29,145 INFO L93 Difference]: Finished difference Result 101493 states and 162313 transitions. [2020-07-20 06:29:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:29:29,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 06:29:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:29:29,223 INFO L225 Difference]: With dead ends: 101493 [2020-07-20 06:29:29,223 INFO L226 Difference]: Without dead ends: 67981 [2020-07-20 06:29:29,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:29:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67981 states. [2020-07-20 06:29:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67981 to 67979. [2020-07-20 06:29:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67979 states. [2020-07-20 06:29:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 108295 transitions. [2020-07-20 06:29:32,212 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 108295 transitions. Word has length 484 [2020-07-20 06:29:32,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:29:32,212 INFO L479 AbstractCegarLoop]: Abstraction has 67979 states and 108295 transitions. [2020-07-20 06:29:32,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:29:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 108295 transitions. [2020-07-20 06:29:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 06:29:32,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:29:32,280 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] [2020-07-20 06:29:32,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 06:29:32,281 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:29:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:29:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2030409168, now seen corresponding path program 1 times [2020-07-20 06:29:32,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:29:32,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153698297] [2020-07-20 06:29:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:29:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:33,154 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:29:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:29:33,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153698297] [2020-07-20 06:29:33,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:29:33,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:29:33,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881390031] [2020-07-20 06:29:33,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:29:33,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:29:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:29:33,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:29:33,343 INFO L87 Difference]: Start difference. First operand 67979 states and 108295 transitions. Second operand 4 states. [2020-07-20 06:29:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:29:49,230 INFO L93 Difference]: Finished difference Result 199189 states and 316915 transitions. [2020-07-20 06:29:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:29:49,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 06:29:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:29:49,369 INFO L225 Difference]: With dead ends: 199189 [2020-07-20 06:29:49,369 INFO L226 Difference]: Without dead ends: 133603 [2020-07-20 06:29:49,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:29:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133603 states. [2020-07-20 06:29:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133603 to 68369. [2020-07-20 06:29:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68369 states. [2020-07-20 06:29:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68369 states to 68369 states and 108871 transitions. [2020-07-20 06:29:53,031 INFO L78 Accepts]: Start accepts. Automaton has 68369 states and 108871 transitions. Word has length 485 [2020-07-20 06:29:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:29:53,032 INFO L479 AbstractCegarLoop]: Abstraction has 68369 states and 108871 transitions. [2020-07-20 06:29:53,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:29:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 68369 states and 108871 transitions. [2020-07-20 06:29:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 06:29:53,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:29:53,085 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] [2020-07-20 06:29:53,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 06:29:53,085 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:29:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:29:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1971007991, now seen corresponding path program 1 times [2020-07-20 06:29:53,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:29:53,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331875452] [2020-07-20 06:29:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:29:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:54,201 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:29:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:29:54,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331875452] [2020-07-20 06:29:54,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:29:54,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:29:54,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329040589] [2020-07-20 06:29:54,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:29:54,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:29:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:29:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:29:54,428 INFO L87 Difference]: Start difference. First operand 68369 states and 108871 transitions. Second operand 4 states. [2020-07-20 06:30:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:30:20,939 INFO L93 Difference]: Finished difference Result 200055 states and 318313 transitions. [2020-07-20 06:30:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:30:20,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-20 06:30:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:30:21,079 INFO L225 Difference]: With dead ends: 200055 [2020-07-20 06:30:21,079 INFO L226 Difference]: Without dead ends: 134536 [2020-07-20 06:30:21,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:30:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134536 states. [2020-07-20 06:30:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134536 to 134534. [2020-07-20 06:30:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134534 states. [2020-07-20 06:30:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134534 states to 134534 states and 213380 transitions. [2020-07-20 06:30:28,974 INFO L78 Accepts]: Start accepts. Automaton has 134534 states and 213380 transitions. Word has length 486 [2020-07-20 06:30:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:30:28,975 INFO L479 AbstractCegarLoop]: Abstraction has 134534 states and 213380 transitions. [2020-07-20 06:30:28,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:30:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 134534 states and 213380 transitions. [2020-07-20 06:30:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 06:30:29,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:30:29,081 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] [2020-07-20 06:30:29,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 06:30:29,081 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:30:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:30:29,081 INFO L82 PathProgramCache]: Analyzing trace with hash -917079770, now seen corresponding path program 1 times [2020-07-20 06:30:29,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:30:29,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141874250] [2020-07-20 06:30:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:30:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:30:30,871 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:30:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:30:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:30:31,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141874250] [2020-07-20 06:30:31,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:30:31,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:30:31,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166245296] [2020-07-20 06:30:31,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:30:31,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:30:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:30:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:30:31,091 INFO L87 Difference]: Start difference. First operand 134534 states and 213380 transitions. Second operand 5 states. [2020-07-20 06:30:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:30:55,932 INFO L93 Difference]: Finished difference Result 312717 states and 499578 transitions. [2020-07-20 06:30:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:30:55,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-07-20 06:30:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:30:56,117 INFO L225 Difference]: With dead ends: 312717 [2020-07-20 06:30:56,117 INFO L226 Difference]: Without dead ends: 159955 [2020-07-20 06:30:56,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:30:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159955 states. [2020-07-20 06:31:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159955 to 159953. [2020-07-20 06:31:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159953 states. [2020-07-20 06:31:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159953 states to 159953 states and 254900 transitions. [2020-07-20 06:31:07,573 INFO L78 Accepts]: Start accepts. Automaton has 159953 states and 254900 transitions. Word has length 486 [2020-07-20 06:31:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:31:07,573 INFO L479 AbstractCegarLoop]: Abstraction has 159953 states and 254900 transitions. [2020-07-20 06:31:07,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:31:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 159953 states and 254900 transitions. [2020-07-20 06:31:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 06:31:07,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:31:07,723 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] [2020-07-20 06:31:07,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 06:31:07,723 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:31:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:31:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-20 06:31:07,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:31:07,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270115135] [2020-07-20 06:31:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:31:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:09,465 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:31:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:31:09,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270115135] [2020-07-20 06:31:09,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:31:09,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:31:09,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280240023] [2020-07-20 06:31:09,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:31:09,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:31:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:31:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:31:09,655 INFO L87 Difference]: Start difference. First operand 159953 states and 254900 transitions. Second operand 4 states. [2020-07-20 06:31:10,452 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2020-07-20 06:31:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:31:36,030 INFO L93 Difference]: Finished difference Result 332173 states and 515718 transitions. [2020-07-20 06:31:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:31:36,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 06:31:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:31:36,297 INFO L225 Difference]: With dead ends: 332173 [2020-07-20 06:31:36,297 INFO L226 Difference]: Without dead ends: 243475 [2020-07-20 06:31:36,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:31:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243475 states. [2020-07-20 06:31:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243475 to 243473. [2020-07-20 06:31:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243473 states. [2020-07-20 06:31:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243473 states to 243473 states and 379388 transitions. [2020-07-20 06:31:54,774 INFO L78 Accepts]: Start accepts. Automaton has 243473 states and 379388 transitions. Word has length 488 [2020-07-20 06:31:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:31:54,775 INFO L479 AbstractCegarLoop]: Abstraction has 243473 states and 379388 transitions. [2020-07-20 06:31:54,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:31:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 243473 states and 379388 transitions. [2020-07-20 06:31:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 06:31:54,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:31:54,959 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] [2020-07-20 06:31:54,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 06:31:54,959 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:31:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:31:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1358520816, now seen corresponding path program 1 times [2020-07-20 06:31:54,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:31:54,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586494140] [2020-07-20 06:31:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:31:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:56,865 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:31:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:31:57,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586494140] [2020-07-20 06:31:57,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:31:57,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-20 06:31:57,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298838806] [2020-07-20 06:31:57,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 06:31:57,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:31:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 06:31:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-07-20 06:31:57,237 INFO L87 Difference]: Start difference. First operand 243473 states and 379388 transitions. Second operand 18 states. [2020-07-20 06:31:58,523 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 425 [2020-07-20 06:32:13,894 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-07-20 06:32:22,230 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-07-20 06:33:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:33:04,028 INFO L93 Difference]: Finished difference Result 538745 states and 845384 transitions. [2020-07-20 06:33:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 06:33:04,030 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 488 [2020-07-20 06:33:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:33:04,757 INFO L225 Difference]: With dead ends: 538745 [2020-07-20 06:33:04,757 INFO L226 Difference]: Without dead ends: 508919 [2020-07-20 06:33:04,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=764, Invalid=1992, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 06:33:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508919 states. [2020-07-20 06:33:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508919 to 326929. [2020-07-20 06:33:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326929 states. [2020-07-20 06:33:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326929 states to 326929 states and 509404 transitions. [2020-07-20 06:33:39,148 INFO L78 Accepts]: Start accepts. Automaton has 326929 states and 509404 transitions. Word has length 488 [2020-07-20 06:33:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:33:39,148 INFO L479 AbstractCegarLoop]: Abstraction has 326929 states and 509404 transitions. [2020-07-20 06:33:39,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 06:33:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 326929 states and 509404 transitions. [2020-07-20 06:33:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 06:33:39,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:33:39,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:33:39,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 06:33:39,362 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:33:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:33:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash -763957802, now seen corresponding path program 1 times [2020-07-20 06:33:39,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:33:39,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302034492] [2020-07-20 06:33:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:33:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:33:41,095 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:33:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:33:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:33:41,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302034492] [2020-07-20 06:33:41,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:33:41,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 06:33:41,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727698934] [2020-07-20 06:33:41,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:33:41,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:33:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:33:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:33:41,483 INFO L87 Difference]: Start difference. First operand 326929 states and 509404 transitions. Second operand 14 states. [2020-07-20 06:33:42,627 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 06:33:58,628 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-07-20 06:34:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:34:37,158 INFO L93 Difference]: Finished difference Result 432433 states and 671584 transitions. [2020-07-20 06:34:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 06:34:37,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-20 06:34:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:34:37,546 INFO L225 Difference]: With dead ends: 432433 [2020-07-20 06:34:37,546 INFO L226 Difference]: Without dead ends: 361487 [2020-07-20 06:34:37,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 06:34:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361487 states. [2020-07-20 06:35:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361487 to 255985. [2020-07-20 06:35:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255985 states. [2020-07-20 06:35:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255985 states to 255985 states and 397388 transitions. [2020-07-20 06:35:02,335 INFO L78 Accepts]: Start accepts. Automaton has 255985 states and 397388 transitions. Word has length 488 [2020-07-20 06:35:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:35:02,335 INFO L479 AbstractCegarLoop]: Abstraction has 255985 states and 397388 transitions. [2020-07-20 06:35:02,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:35:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 255985 states and 397388 transitions. [2020-07-20 06:35:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 06:35:02,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:35:02,561 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] [2020-07-20 06:35:02,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 06:35:02,562 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:35:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:35:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-20 06:35:02,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:35:02,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694049200] [2020-07-20 06:35:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:35:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:35:04,455 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:35:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:35:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:35:05,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694049200] [2020-07-20 06:35:05,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:35:05,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 06:35:05,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534708652] [2020-07-20 06:35:05,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:35:05,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:35:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:35:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:35:05,301 INFO L87 Difference]: Start difference. First operand 255985 states and 397388 transitions. Second operand 14 states. [2020-07-20 06:35:06,510 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 06:35:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:35:51,745 INFO L93 Difference]: Finished difference Result 375009 states and 584160 transitions. [2020-07-20 06:35:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 06:35:51,747 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-20 06:35:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:35:52,112 INFO L225 Difference]: With dead ends: 375009 [2020-07-20 06:35:52,112 INFO L226 Difference]: Without dead ends: 346767 [2020-07-20 06:35:52,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 06:35:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346767 states. [2020-07-20 06:36:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346767 to 266561. [2020-07-20 06:36:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266561 states. [2020-07-20 06:36:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266561 states to 266561 states and 412444 transitions. [2020-07-20 06:36:18,254 INFO L78 Accepts]: Start accepts. Automaton has 266561 states and 412444 transitions. Word has length 488 [2020-07-20 06:36:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:36:18,255 INFO L479 AbstractCegarLoop]: Abstraction has 266561 states and 412444 transitions. [2020-07-20 06:36:18,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:36:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 266561 states and 412444 transitions. [2020-07-20 06:36:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 06:36:18,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:36:18,509 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] [2020-07-20 06:36:18,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 06:36:18,509 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:36:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:36:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-20 06:36:18,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:36:18,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762820227] [2020-07-20 06:36:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:36:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:36:19,909 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:36:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:36:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:36:20,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762820227] [2020-07-20 06:36:20,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:36:20,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:36:20,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26596275] [2020-07-20 06:36:20,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:36:20,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:36:20,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:36:20,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:36:20,160 INFO L87 Difference]: Start difference. First operand 266561 states and 412444 transitions. Second operand 5 states. [2020-07-20 06:37:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:37:21,952 INFO L93 Difference]: Finished difference Result 782363 states and 1209659 transitions. [2020-07-20 06:37:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:37:21,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-07-20 06:37:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:37:22,634 INFO L225 Difference]: With dead ends: 782363 [2020-07-20 06:37:22,634 INFO L226 Difference]: Without dead ends: 520004 [2020-07-20 06:37:22,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:37:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520004 states. [2020-07-20 06:38:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520004 to 520002. [2020-07-20 06:38:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520002 states. [2020-07-20 06:38:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520002 states to 520002 states and 801158 transitions. [2020-07-20 06:38:16,031 INFO L78 Accepts]: Start accepts. Automaton has 520002 states and 801158 transitions. Word has length 488 [2020-07-20 06:38:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:38:16,031 INFO L479 AbstractCegarLoop]: Abstraction has 520002 states and 801158 transitions. [2020-07-20 06:38:16,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:38:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 520002 states and 801158 transitions. [2020-07-20 06:38:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 06:38:16,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:38:16,561 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] [2020-07-20 06:38:16,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 06:38:16,561 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:38:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:38:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1949737720, now seen corresponding path program 1 times [2020-07-20 06:38:16,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:38:16,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483526275] [2020-07-20 06:38:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@797f7f83 [2020-07-20 06:38:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:18,695 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 06:38:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:38:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:38:18,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483526275] [2020-07-20 06:38:18,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:38:18,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:38:18,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021957089] [2020-07-20 06:38:18,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:38:18,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:38:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:38:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:38:18,932 INFO L87 Difference]: Start difference. First operand 520002 states and 801158 transitions. Second operand 4 states.