/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=SMALLEST --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:53:27,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:53:27,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:53:27,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:53:27,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:53:27,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:53:27,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:53:27,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:53:27,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:53:27,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:53:27,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:53:27,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:53:27,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:53:27,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:53:27,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:53:27,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:53:27,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:53:27,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:53:27,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:53:27,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:53:27,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:53:27,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:53:27,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:53:27,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:53:27,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:53:27,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:53:27,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:53:27,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:53:27,999 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 [2020-08-21 15:53:28,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:53:28,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:53:28,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:53:28,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:53:28,046 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:53:28,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:53:28,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:53:28,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:53:28,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:53:28,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:53:28,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:53:28,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:53:28,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:53:28,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:53:28,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:53:28,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:53:28,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:53:28,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:53:28,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:53:28,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:53:28,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:53:28,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:53:28,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:53:28,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:53:28,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:53:28,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:53:28,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:53:28,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:53:28,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:53:28,053 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:53:28,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:53:28,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:53:28,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:53:28,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:53:28,354 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:53:28,355 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-08-21 15:53:28,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ac43a13/ef09d7eba58a4e3cb9e767099b7b63a2/FLAG99630c2a6 [2020-08-21 15:53:28,997 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:53:28,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-08-21 15:53:29,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ac43a13/ef09d7eba58a4e3cb9e767099b7b63a2/FLAG99630c2a6 [2020-08-21 15:53:29,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ac43a13/ef09d7eba58a4e3cb9e767099b7b63a2 [2020-08-21 15:53:29,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:53:29,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:53:29,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:53:29,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:53:29,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:53:29,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:53:29" (1/1) ... [2020-08-21 15:53:29,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3666d953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:29, skipping insertion in model container [2020-08-21 15:53:29,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:53:29" (1/1) ... [2020-08-21 15:53:29,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:53:29,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:53:29,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:53:29,967 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:53:30,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:53:30,135 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:53:30,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30 WrapperNode [2020-08-21 15:53:30,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:53:30,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:53:30,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:53:30,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:53:30,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (1/1) ... [2020-08-21 15:53:30,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:53:30,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:53:30,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:53:30,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:53:30,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (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 [2020-08-21 15:53:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:53:30,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:53:30,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:53:30,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:53:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:53:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:53:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 15:53:30,318 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 15:53:30,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:53:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:53:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 15:53:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 15:53:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 15:53:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 15:53:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 15:53:30,322 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 15:53:30,322 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 15:53:30,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:53:30,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:53:30,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:53:31,696 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:53:31,697 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:53:31,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:53:31 BoogieIcfgContainer [2020-08-21 15:53:31,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:53:31,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:53:31,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:53:31,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:53:31,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:53:29" (1/3) ... [2020-08-21 15:53:31,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6583a06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:53:31, skipping insertion in model container [2020-08-21 15:53:31,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:53:30" (2/3) ... [2020-08-21 15:53:31,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6583a06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:53:31, skipping insertion in model container [2020-08-21 15:53:31,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:53:31" (3/3) ... [2020-08-21 15:53:31,712 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-08-21 15:53:31,724 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:53:31,733 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:53:31,748 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:53:31,776 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:53:31,776 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:53:31,777 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:53:31,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:53:31,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:53:31,777 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:53:31,777 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:53:31,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:53:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states. [2020-08-21 15:53:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-21 15:53:31,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:31,818 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] [2020-08-21 15:53:31,818 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -483172071, now seen corresponding path program 1 times [2020-08-21 15:53:31,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:31,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530212397] [2020-08-21 15:53:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:32,834 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:32,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530212397] [2020-08-21 15:53:32,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:32,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:53:32,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600374216] [2020-08-21 15:53:32,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:53:32,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:32,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:53:32,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:32,915 INFO L87 Difference]: Start difference. First operand 304 states. Second operand 4 states. [2020-08-21 15:53:33,171 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-08-21 15:53:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:34,780 INFO L93 Difference]: Finished difference Result 599 states and 1046 transitions. [2020-08-21 15:53:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:53:34,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2020-08-21 15:53:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:34,800 INFO L225 Difference]: With dead ends: 599 [2020-08-21 15:53:34,801 INFO L226 Difference]: Without dead ends: 487 [2020-08-21 15:53:34,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-08-21 15:53:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 485. [2020-08-21 15:53:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-08-21 15:53:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 724 transitions. [2020-08-21 15:53:34,891 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 724 transitions. Word has length 142 [2020-08-21 15:53:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:34,892 INFO L479 AbstractCegarLoop]: Abstraction has 485 states and 724 transitions. [2020-08-21 15:53:34,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:53:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 724 transitions. [2020-08-21 15:53:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-21 15:53:34,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:34,897 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] [2020-08-21 15:53:34,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:53:34,897 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:34,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1126069355, now seen corresponding path program 1 times [2020-08-21 15:53:34,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:34,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002202470] [2020-08-21 15:53:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:35,317 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:35,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:35,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002202470] [2020-08-21 15:53:35,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:35,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:53:35,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706448759] [2020-08-21 15:53:35,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:53:35,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:53:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:35,363 INFO L87 Difference]: Start difference. First operand 485 states and 724 transitions. Second operand 4 states. [2020-08-21 15:53:35,572 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-08-21 15:53:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:36,797 INFO L93 Difference]: Finished difference Result 1027 states and 1575 transitions. [2020-08-21 15:53:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:53:36,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2020-08-21 15:53:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:36,805 INFO L225 Difference]: With dead ends: 1027 [2020-08-21 15:53:36,805 INFO L226 Difference]: Without dead ends: 845 [2020-08-21 15:53:36,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-08-21 15:53:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2020-08-21 15:53:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-08-21 15:53:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1268 transitions. [2020-08-21 15:53:36,865 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1268 transitions. Word has length 142 [2020-08-21 15:53:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:36,866 INFO L479 AbstractCegarLoop]: Abstraction has 843 states and 1268 transitions. [2020-08-21 15:53:36,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:53:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1268 transitions. [2020-08-21 15:53:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-21 15:53:36,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:36,870 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] [2020-08-21 15:53:36,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:53:36,870 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash 229473698, now seen corresponding path program 1 times [2020-08-21 15:53:36,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:36,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546899371] [2020-08-21 15:53:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:37,367 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:37,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546899371] [2020-08-21 15:53:37,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:37,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:53:37,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984077399] [2020-08-21 15:53:37,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:53:37,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:53:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:37,413 INFO L87 Difference]: Start difference. First operand 843 states and 1268 transitions. Second operand 5 states. [2020-08-21 15:53:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:39,629 INFO L93 Difference]: Finished difference Result 2459 states and 3695 transitions. [2020-08-21 15:53:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:53:39,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-21 15:53:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:39,640 INFO L225 Difference]: With dead ends: 2459 [2020-08-21 15:53:39,640 INFO L226 Difference]: Without dead ends: 1629 [2020-08-21 15:53:39,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:53:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-08-21 15:53:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1627. [2020-08-21 15:53:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2020-08-21 15:53:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2425 transitions. [2020-08-21 15:53:39,737 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2425 transitions. Word has length 142 [2020-08-21 15:53:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:39,738 INFO L479 AbstractCegarLoop]: Abstraction has 1627 states and 2425 transitions. [2020-08-21 15:53:39,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:53:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2425 transitions. [2020-08-21 15:53:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 15:53:39,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:39,746 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] [2020-08-21 15:53:39,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:53:39,746 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:39,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1866532876, now seen corresponding path program 1 times [2020-08-21 15:53:39,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:39,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044586114] [2020-08-21 15:53:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:40,158 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:40,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044586114] [2020-08-21 15:53:40,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:40,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:53:40,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799767875] [2020-08-21 15:53:40,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:53:40,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:53:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:40,219 INFO L87 Difference]: Start difference. First operand 1627 states and 2425 transitions. Second operand 4 states. [2020-08-21 15:53:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:42,095 INFO L93 Difference]: Finished difference Result 4835 states and 7205 transitions. [2020-08-21 15:53:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:53:42,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-08-21 15:53:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:42,115 INFO L225 Difference]: With dead ends: 4835 [2020-08-21 15:53:42,115 INFO L226 Difference]: Without dead ends: 3240 [2020-08-21 15:53:42,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2020-08-21 15:53:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1629. [2020-08-21 15:53:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-08-21 15:53:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2427 transitions. [2020-08-21 15:53:42,234 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2427 transitions. Word has length 143 [2020-08-21 15:53:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:42,235 INFO L479 AbstractCegarLoop]: Abstraction has 1629 states and 2427 transitions. [2020-08-21 15:53:42,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:53:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2427 transitions. [2020-08-21 15:53:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-21 15:53:42,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:42,239 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] [2020-08-21 15:53:42,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:53:42,240 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1747112419, now seen corresponding path program 1 times [2020-08-21 15:53:42,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:42,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601699075] [2020-08-21 15:53:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:42,593 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:42,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:42,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601699075] [2020-08-21 15:53:42,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:42,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:53:42,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693546331] [2020-08-21 15:53:42,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:53:42,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:53:42,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:42,652 INFO L87 Difference]: Start difference. First operand 1629 states and 2427 transitions. Second operand 5 states. [2020-08-21 15:53:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:44,974 INFO L93 Difference]: Finished difference Result 4735 states and 7041 transitions. [2020-08-21 15:53:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:53:44,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-08-21 15:53:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:44,990 INFO L225 Difference]: With dead ends: 4735 [2020-08-21 15:53:44,990 INFO L226 Difference]: Without dead ends: 3140 [2020-08-21 15:53:44,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:53:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2020-08-21 15:53:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3138. [2020-08-21 15:53:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3138 states. [2020-08-21 15:53:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4626 transitions. [2020-08-21 15:53:45,173 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4626 transitions. Word has length 144 [2020-08-21 15:53:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:45,175 INFO L479 AbstractCegarLoop]: Abstraction has 3138 states and 4626 transitions. [2020-08-21 15:53:45,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:53:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4626 transitions. [2020-08-21 15:53:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 15:53:45,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:45,183 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] [2020-08-21 15:53:45,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:53:45,184 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:45,184 INFO L82 PathProgramCache]: Analyzing trace with hash 470263341, now seen corresponding path program 1 times [2020-08-21 15:53:45,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:45,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72275904] [2020-08-21 15:53:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:45,470 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:45,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:45,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72275904] [2020-08-21 15:53:45,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:45,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:53:45,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886779991] [2020-08-21 15:53:45,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:53:45,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:45,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:53:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:45,520 INFO L87 Difference]: Start difference. First operand 3138 states and 4626 transitions. Second operand 4 states. [2020-08-21 15:53:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:48,145 INFO L93 Difference]: Finished difference Result 9330 states and 13750 transitions. [2020-08-21 15:53:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:53:48,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-08-21 15:53:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:48,173 INFO L225 Difference]: With dead ends: 9330 [2020-08-21 15:53:48,173 INFO L226 Difference]: Without dead ends: 6240 [2020-08-21 15:53:48,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6240 states. [2020-08-21 15:53:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6240 to 3142. [2020-08-21 15:53:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3142 states. [2020-08-21 15:53:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4630 transitions. [2020-08-21 15:53:48,373 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4630 transitions. Word has length 145 [2020-08-21 15:53:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:48,374 INFO L479 AbstractCegarLoop]: Abstraction has 3142 states and 4630 transitions. [2020-08-21 15:53:48,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:53:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4630 transitions. [2020-08-21 15:53:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:53:48,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:48,381 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] [2020-08-21 15:53:48,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:53:48,382 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1966669402, now seen corresponding path program 1 times [2020-08-21 15:53:48,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:48,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228719656] [2020-08-21 15:53:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:48,654 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:48,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:48,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228719656] [2020-08-21 15:53:48,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:48,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:53:48,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301871078] [2020-08-21 15:53:48,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:53:48,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:53:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:48,700 INFO L87 Difference]: Start difference. First operand 3142 states and 4630 transitions. Second operand 4 states. [2020-08-21 15:53:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:51,042 INFO L93 Difference]: Finished difference Result 8922 states and 13174 transitions. [2020-08-21 15:53:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:53:51,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 15:53:51,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:51,070 INFO L225 Difference]: With dead ends: 8922 [2020-08-21 15:53:51,070 INFO L226 Difference]: Without dead ends: 6068 [2020-08-21 15:53:51,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6068 states. [2020-08-21 15:53:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6068 to 6066. [2020-08-21 15:53:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6066 states. [2020-08-21 15:53:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 8848 transitions. [2020-08-21 15:53:51,452 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 8848 transitions. Word has length 146 [2020-08-21 15:53:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:51,453 INFO L479 AbstractCegarLoop]: Abstraction has 6066 states and 8848 transitions. [2020-08-21 15:53:51,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:53:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 8848 transitions. [2020-08-21 15:53:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:53:51,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:51,465 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] [2020-08-21 15:53:51,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:53:51,467 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1533440317, now seen corresponding path program 1 times [2020-08-21 15:53:51,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:51,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545383887] [2020-08-21 15:53:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:51,797 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:51,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545383887] [2020-08-21 15:53:51,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:51,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:53:51,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445474735] [2020-08-21 15:53:51,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:53:51,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:53:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:51,831 INFO L87 Difference]: Start difference. First operand 6066 states and 8848 transitions. Second operand 5 states. [2020-08-21 15:53:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:53,557 INFO L93 Difference]: Finished difference Result 12466 states and 18074 transitions. [2020-08-21 15:53:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:53:53,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 15:53:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:53,584 INFO L225 Difference]: With dead ends: 12466 [2020-08-21 15:53:53,584 INFO L226 Difference]: Without dead ends: 6280 [2020-08-21 15:53:53,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:53:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-08-21 15:53:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-08-21 15:53:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-08-21 15:53:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9022 transitions. [2020-08-21 15:53:53,870 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9022 transitions. Word has length 146 [2020-08-21 15:53:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:53,870 INFO L479 AbstractCegarLoop]: Abstraction has 6278 states and 9022 transitions. [2020-08-21 15:53:53,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:53:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9022 transitions. [2020-08-21 15:53:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:53:53,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:53,881 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] [2020-08-21 15:53:53,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:53:53,881 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:53,881 INFO L82 PathProgramCache]: Analyzing trace with hash -400414044, now seen corresponding path program 1 times [2020-08-21 15:53:53,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:53,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802350602] [2020-08-21 15:53:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:54,175 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:54,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802350602] [2020-08-21 15:53:54,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:54,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:53:54,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937886387] [2020-08-21 15:53:54,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:53:54,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:53:54,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:54,231 INFO L87 Difference]: Start difference. First operand 6278 states and 9022 transitions. Second operand 5 states. [2020-08-21 15:53:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:56,600 INFO L93 Difference]: Finished difference Result 9166 states and 13176 transitions. [2020-08-21 15:53:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:53:56,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 15:53:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:56,617 INFO L225 Difference]: With dead ends: 9166 [2020-08-21 15:53:56,617 INFO L226 Difference]: Without dead ends: 6280 [2020-08-21 15:53:56,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:53:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-08-21 15:53:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6066. [2020-08-21 15:53:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6066 states. [2020-08-21 15:53:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 8760 transitions. [2020-08-21 15:53:56,969 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 8760 transitions. Word has length 146 [2020-08-21 15:53:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:56,969 INFO L479 AbstractCegarLoop]: Abstraction has 6066 states and 8760 transitions. [2020-08-21 15:53:56,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:53:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 8760 transitions. [2020-08-21 15:53:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 15:53:56,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:56,990 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] [2020-08-21 15:53:56,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:53:56,991 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:56,991 INFO L82 PathProgramCache]: Analyzing trace with hash -946102129, now seen corresponding path program 1 times [2020-08-21 15:53:56,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:56,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807346833] [2020-08-21 15:53:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:57,245 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:57,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807346833] [2020-08-21 15:53:57,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:57,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:53:57,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282443311] [2020-08-21 15:53:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:53:57,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:57,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:53:57,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:57,279 INFO L87 Difference]: Start difference. First operand 6066 states and 8760 transitions. Second operand 4 states. [2020-08-21 15:53:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:53:59,249 INFO L93 Difference]: Finished difference Result 14910 states and 21518 transitions. [2020-08-21 15:53:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:53:59,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-21 15:53:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:53:59,274 INFO L225 Difference]: With dead ends: 14910 [2020-08-21 15:53:59,274 INFO L226 Difference]: Without dead ends: 12024 [2020-08-21 15:53:59,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:53:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2020-08-21 15:53:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 6074. [2020-08-21 15:53:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6074 states. [2020-08-21 15:53:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6074 states to 6074 states and 8768 transitions. [2020-08-21 15:53:59,648 INFO L78 Accepts]: Start accepts. Automaton has 6074 states and 8768 transitions. Word has length 147 [2020-08-21 15:53:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:53:59,649 INFO L479 AbstractCegarLoop]: Abstraction has 6074 states and 8768 transitions. [2020-08-21 15:53:59,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:53:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6074 states and 8768 transitions. [2020-08-21 15:53:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 15:53:59,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:53:59,655 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] [2020-08-21 15:53:59,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:53:59,655 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:53:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:53:59,656 INFO L82 PathProgramCache]: Analyzing trace with hash 585736260, now seen corresponding path program 1 times [2020-08-21 15:53:59,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:53:59,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904350676] [2020-08-21 15:53:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:53:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:59,934 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-08-21 15:53:59,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:53:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:53:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:53:59,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904350676] [2020-08-21 15:53:59,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:53:59,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:53:59,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714788898] [2020-08-21 15:53:59,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:53:59,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:53:59,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:53:59,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:53:59,980 INFO L87 Difference]: Start difference. First operand 6074 states and 8768 transitions. Second operand 5 states. [2020-08-21 15:54:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:54:02,526 INFO L93 Difference]: Finished difference Result 17704 states and 25485 transitions. [2020-08-21 15:54:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:54:02,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-21 15:54:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:54:02,553 INFO L225 Difference]: With dead ends: 17704 [2020-08-21 15:54:02,553 INFO L226 Difference]: Without dead ends: 11677 [2020-08-21 15:54:02,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:54:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11677 states. [2020-08-21 15:54:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11677 to 11675. [2020-08-21 15:54:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11675 states. [2020-08-21 15:54:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11675 states to 11675 states and 16612 transitions. [2020-08-21 15:54:03,262 INFO L78 Accepts]: Start accepts. Automaton has 11675 states and 16612 transitions. Word has length 148 [2020-08-21 15:54:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:54:03,262 INFO L479 AbstractCegarLoop]: Abstraction has 11675 states and 16612 transitions. [2020-08-21 15:54:03,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:54:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11675 states and 16612 transitions. [2020-08-21 15:54:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 15:54:03,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:54:03,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:54:03,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:54:03,275 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:54:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:54:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1497708571, now seen corresponding path program 1 times [2020-08-21 15:54:03,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:54:03,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983138245] [2020-08-21 15:54:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:54:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:54:03,339 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:54:03,339 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:54:03,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:54:03,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:54:03 BoogieIcfgContainer [2020-08-21 15:54:03,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:54:03,394 INFO L168 Benchmark]: Toolchain (without parser) took 34080.20 ms. Allocated memory was 141.0 MB in the beginning and 866.1 MB in the end (delta: 725.1 MB). Free memory was 103.0 MB in the beginning and 503.5 MB in the end (delta: -400.5 MB). Peak memory consumption was 324.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:54:03,395 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:54:03,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.26 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 170.2 MB in the end (delta: -67.4 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:54:03,397 INFO L168 Benchmark]: Boogie Preprocessor took 86.57 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 166.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:54:03,397 INFO L168 Benchmark]: RCFGBuilder took 1480.28 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 166.1 MB in the beginning and 156.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 79.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:54:03,398 INFO L168 Benchmark]: TraceAbstraction took 31687.91 ms. Allocated memory was 235.9 MB in the beginning and 866.1 MB in the end (delta: 630.2 MB). Free memory was 155.3 MB in the beginning and 503.5 MB in the end (delta: -348.2 MB). Peak memory consumption was 282.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:54:03,401 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 820.26 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 170.2 MB in the end (delta: -67.4 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.57 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 166.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1480.28 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 166.1 MB in the beginning and 156.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 79.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31687.91 ms. Allocated memory was 235.9 MB in the beginning and 866.1 MB in the end (delta: 630.2 MB). Free memory was 155.3 MB in the beginning and 503.5 MB in the end (delta: -348.2 MB). Peak memory consumption was 282.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 813]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L14] msg_t nomsg = (msg_t )-1; [L15] port_t p12 = 0; [L16] char p12_old = '\x0'; [L17] char p12_new = '\x0'; [L18] _Bool ep12 = 0; [L19] port_t p13 = 0; [L20] char p13_old = '\x0'; [L21] char p13_new = '\x0'; [L22] _Bool ep13 = 0; [L23] port_t p21 = 0; [L24] char p21_old = '\x0'; [L25] char p21_new = '\x0'; [L26] _Bool ep21 = 0; [L27] port_t p23 = 0; [L28] char p23_old = '\x0'; [L29] char p23_new = '\x0'; [L30] _Bool ep23 = 0; [L31] port_t p31 = 0; [L32] char p31_old = '\x0'; [L33] char p31_new = '\x0'; [L34] _Bool ep31 = 0; [L35] port_t p32 = 0; [L36] char p32_old = '\x0'; [L37] char p32_new = '\x0'; [L38] _Bool ep32 = 0; [L39] char id1 = '\x0'; [L40] char r1 = '\x0'; [L41] char st1 = '\x0'; [L42] char nl1 = '\x0'; [L43] char m1 = '\x0'; [L44] char max1 = '\x0'; [L45] _Bool mode1 = 0; [L46] char id2 = '\x0'; [L47] char r2 = '\x0'; [L48] char st2 = '\x0'; [L49] char nl2 = '\x0'; [L50] char m2 = '\x0'; [L51] char max2 = '\x0'; [L52] _Bool mode2 = 0; [L53] char id3 = '\x0'; [L54] char r3 = '\x0'; [L55] char st3 = '\x0'; [L56] char nl3 = '\x0'; [L57] char m3 = '\x0'; [L58] char max3 = '\x0'; [L59] _Bool mode3 = 0; [L63] void (*nodes[3])() = { &node1, &node2, &node3 }; [L67] int __return_1708; [L68] int __return_1836; [L69] int __return_1954; [L70] int __return_2075; [L71] int __return_2198; [L72] int __tmp_2199_0; [L73] int __return_2307; [L74] int __return_2212; [L77] int main__c1; [L78] int main__i2; [L79] main__c1 = 0 [L80] ep12 = __VERIFIER_nondet_bool() [L81] ep13 = __VERIFIER_nondet_bool() [L82] ep21 = __VERIFIER_nondet_bool() [L83] ep23 = __VERIFIER_nondet_bool() [L84] ep31 = __VERIFIER_nondet_bool() [L85] ep32 = __VERIFIER_nondet_bool() [L86] id1 = __VERIFIER_nondet_char() [L87] r1 = __VERIFIER_nondet_char() [L88] st1 = __VERIFIER_nondet_char() [L89] nl1 = __VERIFIER_nondet_char() [L90] m1 = __VERIFIER_nondet_char() [L91] max1 = __VERIFIER_nondet_char() [L92] mode1 = __VERIFIER_nondet_bool() [L93] id2 = __VERIFIER_nondet_char() [L94] r2 = __VERIFIER_nondet_char() [L95] st2 = __VERIFIER_nondet_char() [L96] nl2 = __VERIFIER_nondet_char() [L97] m2 = __VERIFIER_nondet_char() [L98] max2 = __VERIFIER_nondet_char() [L99] mode2 = __VERIFIER_nondet_bool() [L100] id3 = __VERIFIER_nondet_char() [L101] r3 = __VERIFIER_nondet_char() [L102] st3 = __VERIFIER_nondet_char() [L103] nl3 = __VERIFIER_nondet_char() [L104] m3 = __VERIFIER_nondet_char() [L105] max3 = __VERIFIER_nondet_char() [L106] mode3 = __VERIFIER_nondet_bool() [L108] _Bool init__r121; [L109] _Bool init__r131; [L110] _Bool init__r211; [L111] _Bool init__r231; [L112] _Bool init__r311; [L113] _Bool init__r321; [L114] _Bool init__r122; [L115] int init__tmp; [L116] _Bool init__r132; [L117] int init__tmp___0; [L118] _Bool init__r212; [L119] int init__tmp___1; [L120] _Bool init__r232; [L121] int init__tmp___2; [L122] _Bool init__r312; [L123] int init__tmp___3; [L124] _Bool init__r322; [L125] int init__tmp___4; [L126] int init__tmp___5; [L127] init__r121 = ep12 [L128] init__r131 = ep13 [L129] init__r211 = ep21 [L130] init__r231 = ep23 [L131] init__r311 = ep31 [L132] init__r321 = ep32 [L133] COND FALSE !(!(init__r121 == 0)) [L2223] COND FALSE !(!(init__r131 == 0)) [L2239] init__tmp = 0 [L137] init__r122 = (_Bool)init__tmp [L138] COND FALSE !(!(init__r131 == 0)) [L2200] COND FALSE !(!(init__r121 == 0)) [L2216] init__tmp___0 = 0 [L142] init__r132 = (_Bool)init__tmp___0 [L143] COND FALSE !(!(init__r211 == 0)) [L2177] COND FALSE !(!(init__r231 == 0)) [L2193] init__tmp___1 = 0 [L147] init__r212 = (_Bool)init__tmp___1 [L148] COND FALSE !(!(init__r231 == 0)) [L2154] COND FALSE !(!(init__r211 == 0)) [L2170] init__tmp___2 = 0 [L152] init__r232 = (_Bool)init__tmp___2 [L153] COND FALSE !(!(init__r311 == 0)) [L2131] COND FALSE !(!(init__r321 == 0)) [L2147] init__tmp___3 = 0 [L157] init__r312 = (_Bool)init__tmp___3 [L158] COND FALSE !(!(init__r321 == 0)) [L2108] COND FALSE !(!(init__r311 == 0)) [L2124] init__tmp___4 = 0 [L162] init__r322 = (_Bool)init__tmp___4 [L163] COND TRUE ((int)id1) != ((int)id2) [L165] COND TRUE ((int)id1) != ((int)id3) [L167] COND TRUE ((int)id2) != ((int)id3) [L169] COND TRUE ((int)id1) >= 0 [L171] COND TRUE ((int)id2) >= 0 [L173] COND TRUE ((int)id3) >= 0 [L175] COND TRUE ((int)r1) == 0 [L177] COND TRUE ((int)r2) == 0 [L179] COND TRUE ((int)r3) == 0 [L181] COND TRUE ((int)max1) == ((int)id1) [L183] COND TRUE ((int)max2) == ((int)id2) [L185] COND TRUE ((int)max3) == ((int)id3) [L187] COND TRUE ((int)st1) == 0 [L189] COND TRUE ((int)st2) == 0 [L191] COND TRUE ((int)st3) == 0 [L193] COND TRUE ((int)nl1) == 0 [L195] COND TRUE ((int)nl2) == 0 [L197] COND TRUE ((int)nl3) == 0 [L199] COND TRUE ((int)mode1) == 0 [L201] COND TRUE ((int)mode2) == 0 [L203] COND TRUE ((int)mode3) == 0 [L205] init__tmp___5 = 1 [L206] __return_1708 = init__tmp___5 [L207] main__i2 = __return_1708 [L208] COND TRUE main__i2 != 0 [L210] p12_old = nomsg [L211] p12_new = nomsg [L212] p13_old = nomsg [L213] p13_new = nomsg [L214] p21_old = nomsg [L215] p21_new = nomsg [L216] p23_old = nomsg [L217] p23_new = nomsg [L218] p31_old = nomsg [L219] p31_new = nomsg [L220] p32_old = nomsg [L221] p32_new = nomsg [L222] main__i2 = 0 [L223] COND TRUE main__i2 < 6 [L226] COND FALSE !(!(mode1 == 0)) [L232] COND TRUE ((int)r1) < 2 [L234] COND FALSE !(!(ep12 == 0)) [L245] COND FALSE !(!(ep13 == 0)) [L256] mode1 = 1 [L258] COND FALSE !(!(mode2 == 0)) [L264] COND TRUE ((int)r2) < 2 [L266] COND FALSE !(!(ep21 == 0)) [L277] COND FALSE !(!(ep23 == 0)) [L288] mode2 = 1 [L290] COND FALSE !(!(mode3 == 0)) [L296] COND TRUE ((int)r3) < 2 [L298] COND FALSE !(!(ep31 == 0)) [L309] COND FALSE !(!(ep32 == 0)) [L320] mode3 = 1 [L321] p12_old = p12_new [L322] p12_new = nomsg [L323] p13_old = p13_new [L324] p13_new = nomsg [L325] p21_old = p21_new [L326] p21_new = nomsg [L327] p23_old = p23_new [L328] p23_new = nomsg [L329] p31_old = p31_new [L330] p31_new = nomsg [L331] p32_old = p32_new [L332] p32_new = nomsg [L334] int check__tmp; [L335] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L337] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L339] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L341] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L343] COND FALSE !(((int)r1) >= 2) [L349] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L351] COND TRUE ((int)r1) < 2 [L353] COND FALSE !(((int)r1) >= 2) [L359] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L361] COND TRUE ((int)r1) < 2 [L363] check__tmp = 1 [L364] __return_1836 = check__tmp [L365] main__c1 = __return_1836 [L367] _Bool __tmp_1; [L368] __tmp_1 = main__c1 [L369] _Bool assert__arg; [L370] assert__arg = __tmp_1 [L371] COND FALSE !(assert__arg == 0) [L377] int main____CPAchecker_TMP_0 = main__i2; [L378] main__i2 = main__i2 + 1 [L379] COND TRUE main__i2 < 6 [L382] COND TRUE !(mode1 == 0) [L384] r1 = (char)(((int)r1) + 1) [L385] COND FALSE !(!(ep21 == 0)) [L393] COND FALSE !(!(ep31 == 0)) [L401] COND FALSE !(((int)r1) == 2) [L407] mode1 = 0 [L409] COND TRUE !(mode2 == 0) [L411] r2 = (char)(((int)r2) + 1) [L412] COND FALSE !(!(ep12 == 0)) [L420] COND FALSE !(!(ep32 == 0)) [L428] COND FALSE !(((int)r2) == 2) [L434] mode2 = 0 [L436] COND TRUE !(mode3 == 0) [L438] r3 = (char)(((int)r3) + 1) [L439] COND FALSE !(!(ep13 == 0)) [L447] COND FALSE !(!(ep23 == 0)) [L455] COND FALSE !(((int)r3) == 2) [L461] mode3 = 0 [L462] p12_old = p12_new [L463] p12_new = nomsg [L464] p13_old = p13_new [L465] p13_new = nomsg [L466] p21_old = p21_new [L467] p21_new = nomsg [L468] p23_old = p23_new [L469] p23_new = nomsg [L470] p31_old = p31_new [L471] p31_new = nomsg [L472] p32_old = p32_new [L473] p32_new = nomsg [L475] int check__tmp; [L476] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L478] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L480] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L482] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L484] COND FALSE !(((int)r1) >= 2) [L490] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L492] COND TRUE ((int)r1) < 2 [L494] COND FALSE !(((int)r1) >= 2) [L500] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L502] COND TRUE ((int)r1) < 2 [L504] check__tmp = 1 [L505] __return_1954 = check__tmp [L506] main__c1 = __return_1954 [L508] _Bool __tmp_2; [L509] __tmp_2 = main__c1 [L510] _Bool assert__arg; [L511] assert__arg = __tmp_2 [L512] COND FALSE !(assert__arg == 0) [L518] int main____CPAchecker_TMP_0 = main__i2; [L519] main__i2 = main__i2 + 1 [L520] COND TRUE main__i2 < 6 [L523] COND FALSE !(!(mode1 == 0)) [L529] COND TRUE ((int)r1) < 2 [L531] COND FALSE !(!(ep12 == 0)) [L542] COND FALSE !(!(ep13 == 0)) [L553] mode1 = 1 [L555] COND FALSE !(!(mode2 == 0)) [L561] COND TRUE ((int)r2) < 2 [L563] COND FALSE !(!(ep21 == 0)) [L574] COND FALSE !(!(ep23 == 0)) [L585] mode2 = 1 [L587] COND FALSE !(!(mode3 == 0)) [L593] COND TRUE ((int)r3) < 2 [L595] COND FALSE !(!(ep31 == 0)) [L606] COND FALSE !(!(ep32 == 0)) [L617] mode3 = 1 [L618] p12_old = p12_new [L619] p12_new = nomsg [L620] p13_old = p13_new [L621] p13_new = nomsg [L622] p21_old = p21_new [L623] p21_new = nomsg [L624] p23_old = p23_new [L625] p23_new = nomsg [L626] p31_old = p31_new [L627] p31_new = nomsg [L628] p32_old = p32_new [L629] p32_new = nomsg [L631] int check__tmp; [L632] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L634] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L636] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L638] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L640] COND FALSE !(((int)r1) >= 2) [L646] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L648] COND TRUE ((int)r1) < 2 [L650] COND FALSE !(((int)r1) >= 2) [L656] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L658] COND TRUE ((int)r1) < 2 [L660] check__tmp = 1 [L661] __return_2075 = check__tmp [L662] main__c1 = __return_2075 [L664] _Bool __tmp_3; [L665] __tmp_3 = main__c1 [L666] _Bool assert__arg; [L667] assert__arg = __tmp_3 [L668] COND FALSE !(assert__arg == 0) [L674] int main____CPAchecker_TMP_0 = main__i2; [L675] main__i2 = main__i2 + 1 [L676] COND TRUE main__i2 < 6 [L679] COND TRUE !(mode1 == 0) [L681] r1 = (char)(((int)r1) + 1) [L682] COND FALSE !(!(ep21 == 0)) [L690] COND FALSE !(!(ep31 == 0)) [L698] COND TRUE ((int)r1) == 2 [L700] COND TRUE ((int)max1) == ((int)id1) [L702] st1 = 1 [L704] mode1 = 0 [L706] COND TRUE !(mode2 == 0) [L708] r2 = (char)(((int)r2) + 1) [L709] COND FALSE !(!(ep12 == 0)) [L717] COND FALSE !(!(ep32 == 0)) [L725] COND TRUE ((int)r2) == 2 [L727] COND TRUE ((int)max2) == ((int)id2) [L729] st2 = 1 [L731] mode2 = 0 [L733] COND TRUE !(mode3 == 0) [L735] r3 = (char)(((int)r3) + 1) [L736] COND FALSE !(!(ep13 == 0)) [L744] COND FALSE !(!(ep23 == 0)) [L752] COND TRUE ((int)r3) == 2 [L754] COND TRUE ((int)max3) == ((int)id3) [L756] st3 = 1 [L758] mode3 = 0 [L759] p12_old = p12_new [L760] p12_new = nomsg [L761] p13_old = p13_new [L762] p13_new = nomsg [L763] p21_old = p21_new [L764] p21_new = nomsg [L765] p23_old = p23_new [L766] p23_new = nomsg [L767] p31_old = p31_new [L768] p31_new = nomsg [L769] p32_old = p32_new [L770] p32_new = nomsg [L772] int check__tmp; [L773] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1398] check__tmp = 0 [L801] __return_2198 = check__tmp [L802] main__c1 = __return_2198 [L803] __tmp_2199_0 = main____CPAchecker_TMP_0 [L805] main____CPAchecker_TMP_0 = __tmp_2199_0 [L807] _Bool __tmp_4; [L808] __tmp_4 = main__c1 [L809] _Bool assert__arg; [L810] assert__arg = __tmp_4 [L811] COND TRUE assert__arg == 0 [L813] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 308 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.5s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 23.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7042 SDtfs, 6766 SDslu, 4400 SDs, 0 SdLazy, 7530 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11675occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 11 MinimizatonAttempts, 10887 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1739 NumberOfCodeBlocks, 1739 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1580 ConstructedInterpolants, 0 QuantifiedInterpolants, 798711 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...