/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:35:49,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:35:49,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:35:49,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:35:49,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:35:49,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:35:49,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:35:50,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:35:50,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:35:50,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:35:50,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:35:50,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:35:50,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:35:50,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:35:50,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:35:50,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:35:50,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:35:50,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:35:50,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:35:50,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:35:50,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:35:50,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:35:50,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:35:50,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:35:50,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:35:50,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:35:50,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:35:50,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:35:50,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:35:50,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:35:50,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:35:50,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:35:50,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:35:50,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:35:50,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:35:50,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:35:50,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:35:50,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:35:50,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:35:50,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:35:50,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:35:50,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:35:50,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:35:50,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:35:50,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:35:50,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:35:50,063 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:35:50,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:35:50,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:35:50,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:35:50,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:35:50,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:35:50,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:35:50,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:35:50,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:35:50,065 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:35:50,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:35:50,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:35:50,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:35:50,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:35:50,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:35:50,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:35:50,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:35:50,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:35:50,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:35:50,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:35:50,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:35:50,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:35:50,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:35:50,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:35:50,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:35:50,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:35:50,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:35:50,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:35:50,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:35:50,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:35:50,399 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:35:50,399 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 01:35:50,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/077f6d0ab/73e581f2e712494eadbbaabdd57e7cfe/FLAG1d6512dc8 [2020-08-22 01:35:51,117 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:35:51,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 01:35:51,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/077f6d0ab/73e581f2e712494eadbbaabdd57e7cfe/FLAG1d6512dc8 [2020-08-22 01:35:51,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/077f6d0ab/73e581f2e712494eadbbaabdd57e7cfe [2020-08-22 01:35:51,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:35:51,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:35:51,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:35:51,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:35:51,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:35:51,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:35:51" (1/1) ... [2020-08-22 01:35:51,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eb1efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:51, skipping insertion in model container [2020-08-22 01:35:51,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:35:51" (1/1) ... [2020-08-22 01:35:51,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:35:51,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:35:52,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:35:52,539 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:35:53,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:35:53,037 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:35:53,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53 WrapperNode [2020-08-22 01:35:53,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:35:53,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:35:53,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:35:53,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:35:53,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... [2020-08-22 01:35:53,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:35:53,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:35:53,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:35:53,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:35:53,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-22 01:35:53,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:35:53,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:35:53,346 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 01:35:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:35:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:35:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 01:35:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 01:35:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 01:35:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 01:35:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:35:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 01:35:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 01:35:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 01:35:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 01:35:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 01:35:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 01:35:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 01:35:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 01:35:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 01:35:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:35:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:35:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:35:56,144 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:35:56,145 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:35:56,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:35:56 BoogieIcfgContainer [2020-08-22 01:35:56,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:35:56,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:35:56,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:35:56,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:35:56,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:35:51" (1/3) ... [2020-08-22 01:35:56,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5953e248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:35:56, skipping insertion in model container [2020-08-22 01:35:56,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:35:53" (2/3) ... [2020-08-22 01:35:56,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5953e248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:35:56, skipping insertion in model container [2020-08-22 01:35:56,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:35:56" (3/3) ... [2020-08-22 01:35:56,164 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 01:35:56,174 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:35:56,182 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:35:56,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:35:56,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:35:56,226 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:35:56,226 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:35:56,226 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:35:56,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:35:56,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:35:56,227 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:35:56,227 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:35:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-22 01:35:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 01:35:56,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:35:56,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:35:56,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:35:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:35:56,303 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-22 01:35:56,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:35:56,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560804991] [2020-08-22 01:35:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:35:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:58,066 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:35:58,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:35:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:35:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:35:58,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560804991] [2020-08-22 01:35:58,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:35:58,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:35:58,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89214779] [2020-08-22 01:35:58,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:35:58,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:35:58,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:35:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:35:58,540 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-22 01:35:59,297 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:36:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:04,446 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-22 01:36:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:04,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 01:36:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:04,480 INFO L225 Difference]: With dead ends: 1489 [2020-08-22 01:36:04,480 INFO L226 Difference]: Without dead ends: 1273 [2020-08-22 01:36:04,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-22 01:36:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-22 01:36:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-22 01:36:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-22 01:36:04,691 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-22 01:36:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:04,693 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-22 01:36:04,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-22 01:36:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 01:36:04,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:04,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:04,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:36:04,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-22 01:36:04,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:04,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26036562] [2020-08-22 01:36:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:05,832 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:05,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:06,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26036562] [2020-08-22 01:36:06,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:06,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:06,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796506273] [2020-08-22 01:36:06,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:06,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:06,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:06,196 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-22 01:36:06,987 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:36:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:11,530 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-22 01:36:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:11,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 01:36:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:11,544 INFO L225 Difference]: With dead ends: 2607 [2020-08-22 01:36:11,545 INFO L226 Difference]: Without dead ends: 2225 [2020-08-22 01:36:11,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-22 01:36:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-22 01:36:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-22 01:36:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-22 01:36:11,631 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-22 01:36:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:11,632 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-22 01:36:11,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-22 01:36:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 01:36:11,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:11,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:11,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:36:11,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-22 01:36:11,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:11,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082421238] [2020-08-22 01:36:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:12,678 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:12,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:12,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082421238] [2020-08-22 01:36:12,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:12,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:12,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774275195] [2020-08-22 01:36:12,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:12,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:12,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:12,986 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-22 01:36:13,516 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 01:36:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:17,761 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-22 01:36:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:17,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 01:36:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:17,785 INFO L225 Difference]: With dead ends: 4715 [2020-08-22 01:36:17,785 INFO L226 Difference]: Without dead ends: 4049 [2020-08-22 01:36:17,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-22 01:36:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-22 01:36:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-22 01:36:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-22 01:36:17,917 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-22 01:36:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:17,918 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-22 01:36:17,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-22 01:36:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 01:36:17,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:17,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:17,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:36:17,929 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-22 01:36:17,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:17,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381047194] [2020-08-22 01:36:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:19,241 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:19,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:19,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381047194] [2020-08-22 01:36:19,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:19,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:36:19,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631349619] [2020-08-22 01:36:19,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:36:19,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:36:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:36:19,416 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-22 01:36:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:26,777 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-22 01:36:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:36:26,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-22 01:36:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:26,813 INFO L225 Difference]: With dead ends: 11998 [2020-08-22 01:36:26,813 INFO L226 Difference]: Without dead ends: 7966 [2020-08-22 01:36:26,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:36:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-22 01:36:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-22 01:36:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-22 01:36:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-22 01:36:27,125 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-22 01:36:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:27,126 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-22 01:36:27,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:36:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-22 01:36:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 01:36:27,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:27,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:27,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:36:27,147 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:27,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-22 01:36:27,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:27,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633938927] [2020-08-22 01:36:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:27,913 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:27,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:28,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633938927] [2020-08-22 01:36:28,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:28,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:28,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280645366] [2020-08-22 01:36:28,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:28,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:28,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:28,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:28,180 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-22 01:36:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:36,756 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-22 01:36:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:36:36,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 01:36:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:36,813 INFO L225 Difference]: With dead ends: 23441 [2020-08-22 01:36:36,813 INFO L226 Difference]: Without dead ends: 15606 [2020-08-22 01:36:36,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-22 01:36:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-22 01:36:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-22 01:36:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-22 01:36:37,313 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-22 01:36:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:37,313 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-22 01:36:37,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-22 01:36:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 01:36:37,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:37,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:37,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:36:37,350 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-22 01:36:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:37,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468841492] [2020-08-22 01:36:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:37,956 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:37,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:38,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468841492] [2020-08-22 01:36:38,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:38,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:38,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770174430] [2020-08-22 01:36:38,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:38,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:38,051 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-22 01:36:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:36:46,710 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-22 01:36:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:36:46,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 01:36:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:36:46,778 INFO L225 Difference]: With dead ends: 46737 [2020-08-22 01:36:46,778 INFO L226 Difference]: Without dead ends: 31175 [2020-08-22 01:36:46,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-22 01:36:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-22 01:36:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-22 01:36:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-22 01:36:47,758 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-22 01:36:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:36:47,758 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-22 01:36:47,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:36:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-22 01:36:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 01:36:47,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:36:47,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:36:47,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:36:47,787 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:36:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:36:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-22 01:36:47,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:36:47,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121154583] [2020-08-22 01:36:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:36:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:48,497 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 01:36:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:36:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:36:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:36:48,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121154583] [2020-08-22 01:36:48,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:36:48,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:36:48,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407336217] [2020-08-22 01:36:48,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:36:48,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:36:48,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:36:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:36:48,587 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states.