/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:06:58,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 13:06:58,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 13:06:58,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 13:06:58,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 13:06:58,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 13:06:58,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 13:06:58,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 13:06:58,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 13:06:58,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 13:06:58,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 13:06:58,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 13:06:58,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:06:58,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:06:58,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:06:58,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:06:58,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:06:58,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:06:58,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:06:58,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:06:58,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:06:58,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:06:58,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:06:58,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:06:58,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 13:06:58,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:06:58,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:06:58,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:06:58,314 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 [2020-08-18 13:06:58,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:06:58,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:06:58,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:06:58,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:06:58,338 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:06:58,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:06:58,338 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:06:58,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:06:58,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:06:58,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:06:58,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:06:58,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:06:58,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:06:58,339 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:06:58,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:06:58,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:06:58,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:06:58,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:06:58,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:06:58,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:06:58,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:06:58,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:06:58,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:06:58,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:06:58,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:06:58,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:06:58,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:06:58,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:06:58,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:06:58,343 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:06:58,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:06:58,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:06:58,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:06:58,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:06:58,670 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:06:58,671 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-08-18 13:06:58,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/019988ebc/04fa759e19524dcdade0080d2acaa2d1/FLAGca6de27dc [2020-08-18 13:06:59,299 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:06:59,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-08-18 13:06:59,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/019988ebc/04fa759e19524dcdade0080d2acaa2d1/FLAGca6de27dc [2020-08-18 13:06:59,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/019988ebc/04fa759e19524dcdade0080d2acaa2d1 [2020-08-18 13:06:59,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:06:59,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:06:59,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:06:59,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:06:59,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:06:59,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:06:59" (1/1) ... [2020-08-18 13:06:59,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af41d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:06:59, skipping insertion in model container [2020-08-18 13:06:59,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:06:59" (1/1) ... [2020-08-18 13:06:59,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:06:59,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:07:00,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:07:00,211 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:07:00,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:07:00,418 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:07:00,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00 WrapperNode [2020-08-18 13:07:00,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:07:00,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:07:00,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:07:00,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:07:00,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (1/1) ... [2020-08-18 13:07:00,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:07:00,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:07:00,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:07:00,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:07:00,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (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 [2020-08-18 13:07:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:07:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:07:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 13:07:00,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:07:00,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:07:00,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 13:07:00,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 13:07:00,650 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 13:07:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 13:07:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 13:07:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 13:07:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 13:07:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 13:07:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 13:07:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 13:07:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 13:07:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 13:07:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:07:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:07:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:07:01,979 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:07:01,980 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 13:07:01,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:01 BoogieIcfgContainer [2020-08-18 13:07:01,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:07:01,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:07:01,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:07:01,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:07:01,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:06:59" (1/3) ... [2020-08-18 13:07:01,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7357076f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:01, skipping insertion in model container [2020-08-18 13:07:01,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:00" (2/3) ... [2020-08-18 13:07:01,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7357076f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:01, skipping insertion in model container [2020-08-18 13:07:01,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:01" (3/3) ... [2020-08-18 13:07:01,995 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-08-18 13:07:02,006 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:07:02,014 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:07:02,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:07:02,053 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:07:02,054 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:07:02,054 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:07:02,054 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:07:02,054 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:07:02,054 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:07:02,054 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:07:02,054 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:07:02,083 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states. [2020-08-18 13:07:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 13:07:02,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:02,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:02,101 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:02,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1777408137, now seen corresponding path program 1 times [2020-08-18 13:07:02,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:02,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094700332] [2020-08-18 13:07:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:03,085 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:03,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094700332] [2020-08-18 13:07:03,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:03,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:03,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029033260] [2020-08-18 13:07:03,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:03,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:03,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:03,179 INFO L87 Difference]: Start difference. First operand 336 states. Second operand 4 states. [2020-08-18 13:07:03,462 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-08-18 13:07:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:05,273 INFO L93 Difference]: Finished difference Result 649 states and 1122 transitions. [2020-08-18 13:07:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:05,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-18 13:07:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:05,298 INFO L225 Difference]: With dead ends: 649 [2020-08-18 13:07:05,298 INFO L226 Difference]: Without dead ends: 534 [2020-08-18 13:07:05,303 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 [2020-08-18 13:07:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-08-18 13:07:05,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2020-08-18 13:07:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2020-08-18 13:07:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 797 transitions. [2020-08-18 13:07:05,395 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 797 transitions. Word has length 151 [2020-08-18 13:07:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:05,399 INFO L479 AbstractCegarLoop]: Abstraction has 532 states and 797 transitions. [2020-08-18 13:07:05,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 797 transitions. [2020-08-18 13:07:05,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 13:07:05,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:05,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:05,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:07:05,413 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 623105739, now seen corresponding path program 1 times [2020-08-18 13:07:05,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:05,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989772882] [2020-08-18 13:07:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:05,968 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:05,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:06,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989772882] [2020-08-18 13:07:06,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:06,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:07:06,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16099683] [2020-08-18 13:07:06,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:07:06,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:06,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:07:06,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:06,023 INFO L87 Difference]: Start difference. First operand 532 states and 797 transitions. Second operand 5 states. [2020-08-18 13:07:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:08,627 INFO L93 Difference]: Finished difference Result 1543 states and 2308 transitions. [2020-08-18 13:07:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:08,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-18 13:07:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:08,636 INFO L225 Difference]: With dead ends: 1543 [2020-08-18 13:07:08,636 INFO L226 Difference]: Without dead ends: 1024 [2020-08-18 13:07:08,643 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 [2020-08-18 13:07:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-08-18 13:07:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1022. [2020-08-18 13:07:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1022 states. [2020-08-18 13:07:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1517 transitions. [2020-08-18 13:07:08,748 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1517 transitions. Word has length 151 [2020-08-18 13:07:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:08,749 INFO L479 AbstractCegarLoop]: Abstraction has 1022 states and 1517 transitions. [2020-08-18 13:07:08,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:07:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1517 transitions. [2020-08-18 13:07:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 13:07:08,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:08,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:08,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:07:08,757 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1496630273, now seen corresponding path program 1 times [2020-08-18 13:07:08,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:08,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454631949] [2020-08-18 13:07:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:09,080 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:09,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:09,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454631949] [2020-08-18 13:07:09,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:09,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:09,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569078003] [2020-08-18 13:07:09,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:09,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:09,166 INFO L87 Difference]: Start difference. First operand 1022 states and 1517 transitions. Second operand 4 states. [2020-08-18 13:07:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:11,197 INFO L93 Difference]: Finished difference Result 3020 states and 4481 transitions. [2020-08-18 13:07:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:07:11,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-08-18 13:07:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:11,214 INFO L225 Difference]: With dead ends: 3020 [2020-08-18 13:07:11,214 INFO L226 Difference]: Without dead ends: 2030 [2020-08-18 13:07:11,219 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 [2020-08-18 13:07:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2020-08-18 13:07:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1024. [2020-08-18 13:07:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-08-18 13:07:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1519 transitions. [2020-08-18 13:07:11,322 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1519 transitions. Word has length 152 [2020-08-18 13:07:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:11,323 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1519 transitions. [2020-08-18 13:07:11,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1519 transitions. [2020-08-18 13:07:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-18 13:07:11,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:11,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:11,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:07:11,330 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash -263532694, now seen corresponding path program 1 times [2020-08-18 13:07:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:11,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224945201] [2020-08-18 13:07:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:11,741 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:11,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:11,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224945201] [2020-08-18 13:07:11,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:11,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:07:11,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039802367] [2020-08-18 13:07:11,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:07:11,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:07:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:11,792 INFO L87 Difference]: Start difference. First operand 1024 states and 1519 transitions. Second operand 5 states. [2020-08-18 13:07:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:14,739 INFO L93 Difference]: Finished difference Result 2950 states and 4361 transitions. [2020-08-18 13:07:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:14,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-08-18 13:07:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:14,757 INFO L225 Difference]: With dead ends: 2950 [2020-08-18 13:07:14,757 INFO L226 Difference]: Without dead ends: 1960 [2020-08-18 13:07:14,761 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 [2020-08-18 13:07:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-18 13:07:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1958. [2020-08-18 13:07:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2020-08-18 13:07:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2870 transitions. [2020-08-18 13:07:14,910 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2870 transitions. Word has length 153 [2020-08-18 13:07:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:14,911 INFO L479 AbstractCegarLoop]: Abstraction has 1958 states and 2870 transitions. [2020-08-18 13:07:14,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:07:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2870 transitions. [2020-08-18 13:07:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 13:07:14,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:14,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:14,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:07:14,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:14,920 INFO L82 PathProgramCache]: Analyzing trace with hash -919312578, now seen corresponding path program 1 times [2020-08-18 13:07:14,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:14,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655568995] [2020-08-18 13:07:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:15,264 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:15,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:15,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655568995] [2020-08-18 13:07:15,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:15,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:15,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685336518] [2020-08-18 13:07:15,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:15,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:15,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:15,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:15,297 INFO L87 Difference]: Start difference. First operand 1958 states and 2870 transitions. Second operand 4 states. [2020-08-18 13:07:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:18,483 INFO L93 Difference]: Finished difference Result 5790 states and 8482 transitions. [2020-08-18 13:07:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:07:18,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-08-18 13:07:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:18,503 INFO L225 Difference]: With dead ends: 5790 [2020-08-18 13:07:18,503 INFO L226 Difference]: Without dead ends: 3880 [2020-08-18 13:07:18,508 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 [2020-08-18 13:07:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2020-08-18 13:07:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1962. [2020-08-18 13:07:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1962 states. [2020-08-18 13:07:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2874 transitions. [2020-08-18 13:07:18,638 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2874 transitions. Word has length 154 [2020-08-18 13:07:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:18,639 INFO L479 AbstractCegarLoop]: Abstraction has 1962 states and 2874 transitions. [2020-08-18 13:07:18,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2874 transitions. [2020-08-18 13:07:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-18 13:07:18,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:18,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:18,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:07:18,644 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1585428376, now seen corresponding path program 1 times [2020-08-18 13:07:18,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:18,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504368061] [2020-08-18 13:07:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:18,989 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:18,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:19,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504368061] [2020-08-18 13:07:19,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:19,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:19,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348139721] [2020-08-18 13:07:19,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:19,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:19,045 INFO L87 Difference]: Start difference. First operand 1962 states and 2874 transitions. Second operand 4 states. [2020-08-18 13:07:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:21,510 INFO L93 Difference]: Finished difference Result 5414 states and 7950 transitions. [2020-08-18 13:07:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:07:21,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-08-18 13:07:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:21,529 INFO L225 Difference]: With dead ends: 5414 [2020-08-18 13:07:21,529 INFO L226 Difference]: Without dead ends: 3768 [2020-08-18 13:07:21,533 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 [2020-08-18 13:07:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-08-18 13:07:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-08-18 13:07:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-08-18 13:07:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5456 transitions. [2020-08-18 13:07:21,752 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5456 transitions. Word has length 155 [2020-08-18 13:07:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:21,753 INFO L479 AbstractCegarLoop]: Abstraction has 3766 states and 5456 transitions. [2020-08-18 13:07:21,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5456 transitions. [2020-08-18 13:07:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-18 13:07:21,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:21,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:21,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:07:21,760 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1351457563, now seen corresponding path program 1 times [2020-08-18 13:07:21,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:21,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016694279] [2020-08-18 13:07:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:22,089 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:22,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:22,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016694279] [2020-08-18 13:07:22,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:22,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:07:22,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468054123] [2020-08-18 13:07:22,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:07:22,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:22,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:07:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:22,125 INFO L87 Difference]: Start difference. First operand 3766 states and 5456 transitions. Second operand 5 states. [2020-08-18 13:07:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:23,940 INFO L93 Difference]: Finished difference Result 7914 states and 11362 transitions. [2020-08-18 13:07:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:23,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-08-18 13:07:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:23,962 INFO L225 Difference]: With dead ends: 7914 [2020-08-18 13:07:23,962 INFO L226 Difference]: Without dead ends: 4004 [2020-08-18 13:07:23,970 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 [2020-08-18 13:07:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2020-08-18 13:07:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 4002. [2020-08-18 13:07:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4002 states. [2020-08-18 13:07:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5698 transitions. [2020-08-18 13:07:24,177 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5698 transitions. Word has length 155 [2020-08-18 13:07:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:24,178 INFO L479 AbstractCegarLoop]: Abstraction has 4002 states and 5698 transitions. [2020-08-18 13:07:24,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:07:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5698 transitions. [2020-08-18 13:07:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-18 13:07:24,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:24,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:24,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 13:07:24,191 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 557114249, now seen corresponding path program 1 times [2020-08-18 13:07:24,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:24,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590680851] [2020-08-18 13:07:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:24,587 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:24,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:24,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590680851] [2020-08-18 13:07:24,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:24,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:07:24,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395846572] [2020-08-18 13:07:24,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:07:24,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:24,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:07:24,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:24,638 INFO L87 Difference]: Start difference. First operand 4002 states and 5698 transitions. Second operand 5 states. [2020-08-18 13:07:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:26,978 INFO L93 Difference]: Finished difference Result 5770 states and 8216 transitions. [2020-08-18 13:07:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:26,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-08-18 13:07:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:26,996 INFO L225 Difference]: With dead ends: 5770 [2020-08-18 13:07:26,996 INFO L226 Difference]: Without dead ends: 4004 [2020-08-18 13:07:27,001 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 [2020-08-18 13:07:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2020-08-18 13:07:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 3766. [2020-08-18 13:07:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-08-18 13:07:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5400 transitions. [2020-08-18 13:07:27,178 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5400 transitions. Word has length 155 [2020-08-18 13:07:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:27,179 INFO L479 AbstractCegarLoop]: Abstraction has 3766 states and 5400 transitions. [2020-08-18 13:07:27,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:07:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5400 transitions. [2020-08-18 13:07:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-18 13:07:27,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:27,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:27,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 13:07:27,186 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:27,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1983484075, now seen corresponding path program 1 times [2020-08-18 13:07:27,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:27,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402105281] [2020-08-18 13:07:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:27,437 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:27,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:27,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402105281] [2020-08-18 13:07:27,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:27,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:27,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352864105] [2020-08-18 13:07:27,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:27,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:27,483 INFO L87 Difference]: Start difference. First operand 3766 states and 5400 transitions. Second operand 4 states. [2020-08-18 13:07:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:29,568 INFO L93 Difference]: Finished difference Result 9190 states and 13162 transitions. [2020-08-18 13:07:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:07:29,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-08-18 13:07:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:29,602 INFO L225 Difference]: With dead ends: 9190 [2020-08-18 13:07:29,602 INFO L226 Difference]: Without dead ends: 7424 [2020-08-18 13:07:29,609 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 [2020-08-18 13:07:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7424 states. [2020-08-18 13:07:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7424 to 3774. [2020-08-18 13:07:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3774 states. [2020-08-18 13:07:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 5408 transitions. [2020-08-18 13:07:29,872 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 5408 transitions. Word has length 156 [2020-08-18 13:07:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:29,872 INFO L479 AbstractCegarLoop]: Abstraction has 3774 states and 5408 transitions. [2020-08-18 13:07:29,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 5408 transitions. [2020-08-18 13:07:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 13:07:29,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:29,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:29,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 13:07:29,879 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash -415240646, now seen corresponding path program 1 times [2020-08-18 13:07:29,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:29,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342321711] [2020-08-18 13:07:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:30,184 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-08-18 13:07:30,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:30,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342321711] [2020-08-18 13:07:30,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:30,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:07:30,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833524243] [2020-08-18 13:07:30,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:07:30,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:07:30,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:30,233 INFO L87 Difference]: Start difference. First operand 3774 states and 5408 transitions. Second operand 5 states. [2020-08-18 13:07:32,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:32,768 INFO L93 Difference]: Finished difference Result 10940 states and 15613 transitions. [2020-08-18 13:07:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:32,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-08-18 13:07:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:32,786 INFO L225 Difference]: With dead ends: 10940 [2020-08-18 13:07:32,786 INFO L226 Difference]: Without dead ends: 7213 [2020-08-18 13:07:32,793 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 [2020-08-18 13:07:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2020-08-18 13:07:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 7211. [2020-08-18 13:07:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7211 states. [2020-08-18 13:07:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 10180 transitions. [2020-08-18 13:07:33,112 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 10180 transitions. Word has length 157 [2020-08-18 13:07:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:33,113 INFO L479 AbstractCegarLoop]: Abstraction has 7211 states and 10180 transitions. [2020-08-18 13:07:33,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:07:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 10180 transitions. [2020-08-18 13:07:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 13:07:33,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:33,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:33,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 13:07:33,123 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash 725013288, now seen corresponding path program 1 times [2020-08-18 13:07:33,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:33,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110856269] [2020-08-18 13:07:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 13:07:33,213 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 13:07:33,213 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 13:07:33,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 13:07:33,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 01:07:33 BoogieIcfgContainer [2020-08-18 13:07:33,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 13:07:33,306 INFO L168 Benchmark]: Toolchain (without parser) took 33730.19 ms. Allocated memory was 140.0 MB in the beginning and 673.7 MB in the end (delta: 533.7 MB). Free memory was 100.4 MB in the beginning and 183.2 MB in the end (delta: -82.8 MB). Peak memory consumption was 451.0 MB. Max. memory is 7.1 GB. [2020-08-18 13:07:33,306 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 119.8 MB in the end (delta: 419.9 kB). Peak memory consumption was 419.9 kB. Max. memory is 7.1 GB. [2020-08-18 13:07:33,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 840.48 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 100.0 MB in the beginning and 170.0 MB in the end (delta: -70.0 MB). Peak memory consumption was 34.7 MB. Max. memory is 7.1 GB. [2020-08-18 13:07:33,313 INFO L168 Benchmark]: Boogie Preprocessor took 141.78 ms. Allocated memory is still 204.5 MB. Free memory was 170.0 MB in the beginning and 166.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-18 13:07:33,314 INFO L168 Benchmark]: RCFGBuilder took 1424.62 ms. Allocated memory was 204.5 MB in the beginning and 238.0 MB in the end (delta: 33.6 MB). Free memory was 166.0 MB in the beginning and 145.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. [2020-08-18 13:07:33,319 INFO L168 Benchmark]: TraceAbstraction took 31315.69 ms. Allocated memory was 238.0 MB in the beginning and 673.7 MB in the end (delta: 435.7 MB). Free memory was 145.8 MB in the beginning and 183.2 MB in the end (delta: -37.4 MB). Peak memory consumption was 398.3 MB. Max. memory is 7.1 GB. [2020-08-18 13:07:33,326 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 119.8 MB in the end (delta: 419.9 kB). Peak memory consumption was 419.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 840.48 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 100.0 MB in the beginning and 170.0 MB in the end (delta: -70.0 MB). Peak memory consumption was 34.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.78 ms. Allocated memory is still 204.5 MB. Free memory was 170.0 MB in the beginning and 166.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1424.62 ms. Allocated memory was 204.5 MB in the beginning and 238.0 MB in the end (delta: 33.6 MB). Free memory was 166.0 MB in the beginning and 145.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31315.69 ms. Allocated memory was 238.0 MB in the beginning and 673.7 MB in the end (delta: 435.7 MB). Free memory was 145.8 MB in the beginning and 183.2 MB in the end (delta: -37.4 MB). Peak memory consumption was 398.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 891]: 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] _Bool newmax1 = 0; [L47] char id2 = '\x0'; [L48] char r2 = '\x0'; [L49] char st2 = '\x0'; [L50] char nl2 = '\x0'; [L51] char m2 = '\x0'; [L52] char max2 = '\x0'; [L53] _Bool mode2 = 0; [L54] _Bool newmax2 = 0; [L55] char id3 = '\x0'; [L56] char r3 = '\x0'; [L57] char st3 = '\x0'; [L58] char nl3 = '\x0'; [L59] char m3 = '\x0'; [L60] char max3 = '\x0'; [L61] _Bool mode3 = 0; [L62] _Bool newmax3 = 0; [L66] void (*nodes[3])() = { &node1, &node2, &node3 }; [L70] int __return_1863; [L71] int __return_2009; [L72] int __return_2142; [L73] int __return_2281; [L74] int __return_2419; [L75] int __tmp_2420_0; [L76] int __return_2543; [L77] int __return_2433; [L80] int main__c1; [L81] int main__i2; [L82] main__c1 = 0 [L83] ep12 = __VERIFIER_nondet_bool() [L84] ep13 = __VERIFIER_nondet_bool() [L85] ep21 = __VERIFIER_nondet_bool() [L86] ep23 = __VERIFIER_nondet_bool() [L87] ep31 = __VERIFIER_nondet_bool() [L88] ep32 = __VERIFIER_nondet_bool() [L89] id1 = __VERIFIER_nondet_char() [L90] r1 = __VERIFIER_nondet_char() [L91] st1 = __VERIFIER_nondet_char() [L92] nl1 = __VERIFIER_nondet_char() [L93] m1 = __VERIFIER_nondet_char() [L94] max1 = __VERIFIER_nondet_char() [L95] mode1 = __VERIFIER_nondet_bool() [L96] newmax1 = __VERIFIER_nondet_bool() [L97] id2 = __VERIFIER_nondet_char() [L98] r2 = __VERIFIER_nondet_char() [L99] st2 = __VERIFIER_nondet_char() [L100] nl2 = __VERIFIER_nondet_char() [L101] m2 = __VERIFIER_nondet_char() [L102] max2 = __VERIFIER_nondet_char() [L103] mode2 = __VERIFIER_nondet_bool() [L104] newmax2 = __VERIFIER_nondet_bool() [L105] id3 = __VERIFIER_nondet_char() [L106] r3 = __VERIFIER_nondet_char() [L107] st3 = __VERIFIER_nondet_char() [L108] nl3 = __VERIFIER_nondet_char() [L109] m3 = __VERIFIER_nondet_char() [L110] max3 = __VERIFIER_nondet_char() [L111] mode3 = __VERIFIER_nondet_bool() [L112] newmax3 = __VERIFIER_nondet_bool() [L114] _Bool init__r121; [L115] _Bool init__r131; [L116] _Bool init__r211; [L117] _Bool init__r231; [L118] _Bool init__r311; [L119] _Bool init__r321; [L120] _Bool init__r122; [L121] int init__tmp; [L122] _Bool init__r132; [L123] int init__tmp___0; [L124] _Bool init__r212; [L125] int init__tmp___1; [L126] _Bool init__r232; [L127] int init__tmp___2; [L128] _Bool init__r312; [L129] int init__tmp___3; [L130] _Bool init__r322; [L131] int init__tmp___4; [L132] int init__tmp___5; [L133] init__r121 = ep12 [L134] init__r131 = ep13 [L135] init__r211 = ep21 [L136] init__r231 = ep23 [L137] init__r311 = ep31 [L138] init__r321 = ep32 [L139] COND FALSE !(!(init__r121 == 0)) [L2433] COND FALSE !(!(init__r131 == 0)) [L2449] init__tmp = 0 [L143] init__r122 = (_Bool)init__tmp [L144] COND FALSE !(!(init__r131 == 0)) [L2410] COND FALSE !(!(init__r121 == 0)) [L2426] init__tmp___0 = 0 [L148] init__r132 = (_Bool)init__tmp___0 [L149] COND FALSE !(!(init__r211 == 0)) [L2387] COND FALSE !(!(init__r231 == 0)) [L2403] init__tmp___1 = 0 [L153] init__r212 = (_Bool)init__tmp___1 [L154] COND FALSE !(!(init__r231 == 0)) [L2364] COND FALSE !(!(init__r211 == 0)) [L2380] init__tmp___2 = 0 [L158] init__r232 = (_Bool)init__tmp___2 [L159] COND FALSE !(!(init__r311 == 0)) [L2341] COND FALSE !(!(init__r321 == 0)) [L2357] init__tmp___3 = 0 [L163] init__r312 = (_Bool)init__tmp___3 [L164] COND FALSE !(!(init__r321 == 0)) [L2318] COND FALSE !(!(init__r311 == 0)) [L2334] init__tmp___4 = 0 [L168] init__r322 = (_Bool)init__tmp___4 [L169] COND TRUE ((int)id1) != ((int)id2) [L171] COND TRUE ((int)id1) != ((int)id3) [L173] COND TRUE ((int)id2) != ((int)id3) [L175] COND TRUE ((int)id1) >= 0 [L177] COND TRUE ((int)id2) >= 0 [L179] COND TRUE ((int)id3) >= 0 [L181] COND TRUE ((int)r1) == 0 [L183] COND TRUE ((int)r2) == 0 [L185] COND TRUE ((int)r3) == 0 [L187] COND TRUE ((int)max1) == ((int)id1) [L189] COND TRUE ((int)max2) == ((int)id2) [L191] COND TRUE ((int)max3) == ((int)id3) [L193] COND TRUE ((int)st1) == 0 [L195] COND TRUE ((int)st2) == 0 [L197] COND TRUE ((int)st3) == 0 [L199] COND TRUE ((int)nl1) == 0 [L201] COND TRUE ((int)nl2) == 0 [L203] COND TRUE ((int)nl3) == 0 [L205] COND TRUE ((int)mode1) == 0 [L207] COND TRUE ((int)mode2) == 0 [L209] COND TRUE ((int)mode3) == 0 [L211] COND TRUE !(newmax1 == 0) [L213] COND TRUE !(newmax2 == 0) [L215] COND TRUE !(newmax3 == 0) [L217] init__tmp___5 = 1 [L218] __return_1863 = init__tmp___5 [L219] main__i2 = __return_1863 [L220] COND TRUE main__i2 != 0 [L222] p12_old = nomsg [L223] p12_new = nomsg [L224] p13_old = nomsg [L225] p13_new = nomsg [L226] p21_old = nomsg [L227] p21_new = nomsg [L228] p23_old = nomsg [L229] p23_new = nomsg [L230] p31_old = nomsg [L231] p31_new = nomsg [L232] p32_old = nomsg [L233] p32_new = nomsg [L234] main__i2 = 0 [L235] COND TRUE main__i2 < 6 [L238] _Bool node1__newmax; [L239] node1__newmax = 0 [L240] COND FALSE !(!(mode1 == 0)) [L246] COND TRUE ((int)r1) < 2 [L248] COND FALSE !(!(ep12 == 0)) [L261] COND FALSE !(!(ep13 == 0)) [L274] mode1 = 1 [L276] _Bool node2__newmax; [L277] node2__newmax = 0 [L278] COND FALSE !(!(mode2 == 0)) [L284] COND TRUE ((int)r2) < 2 [L286] COND FALSE !(!(ep21 == 0)) [L299] COND FALSE !(!(ep23 == 0)) [L312] mode2 = 1 [L314] _Bool node3__newmax; [L315] node3__newmax = 0 [L316] COND FALSE !(!(mode3 == 0)) [L322] COND TRUE ((int)r3) < 2 [L324] COND FALSE !(!(ep31 == 0)) [L337] COND FALSE !(!(ep32 == 0)) [L350] mode3 = 1 [L351] p12_old = p12_new [L352] p12_new = nomsg [L353] p13_old = p13_new [L354] p13_new = nomsg [L355] p21_old = p21_new [L356] p21_new = nomsg [L357] p23_old = p23_new [L358] p23_new = nomsg [L359] p31_old = p31_new [L360] p31_new = nomsg [L361] p32_old = p32_new [L362] p32_new = nomsg [L364] int check__tmp; [L365] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L367] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L369] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L371] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L373] COND FALSE !(((int)r1) >= 2) [L379] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L381] COND TRUE ((int)r1) < 2 [L383] COND FALSE !(((int)r1) >= 2) [L389] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L391] COND TRUE ((int)r1) < 2 [L393] check__tmp = 1 [L394] __return_2009 = check__tmp [L395] main__c1 = __return_2009 [L397] _Bool __tmp_1; [L398] __tmp_1 = main__c1 [L399] _Bool assert__arg; [L400] assert__arg = __tmp_1 [L401] COND FALSE !(assert__arg == 0) [L407] int main____CPAchecker_TMP_0 = main__i2; [L408] main__i2 = main__i2 + 1 [L409] COND TRUE main__i2 < 6 [L412] _Bool node1__newmax; [L413] node1__newmax = 0 [L414] COND TRUE !(mode1 == 0) [L416] r1 = (char)(((int)r1) + 1) [L417] COND FALSE !(!(ep21 == 0)) [L426] COND FALSE !(!(ep31 == 0)) [L435] newmax1 = node1__newmax [L436] COND FALSE !(((int)r1) == 2) [L442] mode1 = 0 [L444] _Bool node2__newmax; [L445] node2__newmax = 0 [L446] COND TRUE !(mode2 == 0) [L448] r2 = (char)(((int)r2) + 1) [L449] COND FALSE !(!(ep12 == 0)) [L458] COND FALSE !(!(ep32 == 0)) [L467] newmax2 = node2__newmax [L468] COND FALSE !(((int)r2) == 2) [L474] mode2 = 0 [L476] _Bool node3__newmax; [L477] node3__newmax = 0 [L478] COND TRUE !(mode3 == 0) [L480] r3 = (char)(((int)r3) + 1) [L481] COND FALSE !(!(ep13 == 0)) [L490] COND FALSE !(!(ep23 == 0)) [L499] newmax3 = node3__newmax [L500] COND FALSE !(((int)r3) == 2) [L506] mode3 = 0 [L507] p12_old = p12_new [L508] p12_new = nomsg [L509] p13_old = p13_new [L510] p13_new = nomsg [L511] p21_old = p21_new [L512] p21_new = nomsg [L513] p23_old = p23_new [L514] p23_new = nomsg [L515] p31_old = p31_new [L516] p31_new = nomsg [L517] p32_old = p32_new [L518] p32_new = nomsg [L520] int check__tmp; [L521] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L523] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L525] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L527] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L529] COND FALSE !(((int)r1) >= 2) [L535] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L537] COND TRUE ((int)r1) < 2 [L539] COND FALSE !(((int)r1) >= 2) [L545] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L547] COND TRUE ((int)r1) < 2 [L549] check__tmp = 1 [L550] __return_2142 = check__tmp [L551] main__c1 = __return_2142 [L553] _Bool __tmp_2; [L554] __tmp_2 = main__c1 [L555] _Bool assert__arg; [L556] assert__arg = __tmp_2 [L557] COND FALSE !(assert__arg == 0) [L563] int main____CPAchecker_TMP_0 = main__i2; [L564] main__i2 = main__i2 + 1 [L565] COND TRUE main__i2 < 6 [L568] _Bool node1__newmax; [L569] node1__newmax = 0 [L570] COND FALSE !(!(mode1 == 0)) [L576] COND TRUE ((int)r1) < 2 [L578] COND FALSE !(!(ep12 == 0)) [L591] COND FALSE !(!(ep13 == 0)) [L604] mode1 = 1 [L606] _Bool node2__newmax; [L607] node2__newmax = 0 [L608] COND FALSE !(!(mode2 == 0)) [L614] COND TRUE ((int)r2) < 2 [L616] COND FALSE !(!(ep21 == 0)) [L629] COND FALSE !(!(ep23 == 0)) [L642] mode2 = 1 [L644] _Bool node3__newmax; [L645] node3__newmax = 0 [L646] COND FALSE !(!(mode3 == 0)) [L652] COND TRUE ((int)r3) < 2 [L654] COND FALSE !(!(ep31 == 0)) [L667] COND FALSE !(!(ep32 == 0)) [L680] mode3 = 1 [L681] p12_old = p12_new [L682] p12_new = nomsg [L683] p13_old = p13_new [L684] p13_new = nomsg [L685] p21_old = p21_new [L686] p21_new = nomsg [L687] p23_old = p23_new [L688] p23_new = nomsg [L689] p31_old = p31_new [L690] p31_new = nomsg [L691] p32_old = p32_new [L692] p32_new = nomsg [L694] int check__tmp; [L695] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L697] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L699] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L701] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L703] COND FALSE !(((int)r1) >= 2) [L709] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L711] COND TRUE ((int)r1) < 2 [L713] COND FALSE !(((int)r1) >= 2) [L719] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L721] COND TRUE ((int)r1) < 2 [L723] check__tmp = 1 [L724] __return_2281 = check__tmp [L725] main__c1 = __return_2281 [L727] _Bool __tmp_3; [L728] __tmp_3 = main__c1 [L729] _Bool assert__arg; [L730] assert__arg = __tmp_3 [L731] COND FALSE !(assert__arg == 0) [L737] int main____CPAchecker_TMP_0 = main__i2; [L738] main__i2 = main__i2 + 1 [L739] COND TRUE main__i2 < 6 [L742] _Bool node1__newmax; [L743] node1__newmax = 0 [L744] COND TRUE !(mode1 == 0) [L746] r1 = (char)(((int)r1) + 1) [L747] COND FALSE !(!(ep21 == 0)) [L756] COND FALSE !(!(ep31 == 0)) [L765] newmax1 = node1__newmax [L766] COND TRUE ((int)r1) == 2 [L768] COND TRUE ((int)max1) == ((int)id1) [L770] st1 = 1 [L772] mode1 = 0 [L774] _Bool node2__newmax; [L775] node2__newmax = 0 [L776] COND TRUE !(mode2 == 0) [L778] r2 = (char)(((int)r2) + 1) [L779] COND FALSE !(!(ep12 == 0)) [L788] COND FALSE !(!(ep32 == 0)) [L797] newmax2 = node2__newmax [L798] COND TRUE ((int)r2) == 2 [L800] COND TRUE ((int)max2) == ((int)id2) [L802] st2 = 1 [L804] mode2 = 0 [L806] _Bool node3__newmax; [L807] node3__newmax = 0 [L808] COND TRUE !(mode3 == 0) [L810] r3 = (char)(((int)r3) + 1) [L811] COND FALSE !(!(ep13 == 0)) [L820] COND FALSE !(!(ep23 == 0)) [L829] newmax3 = node3__newmax [L830] COND TRUE ((int)r3) == 2 [L832] COND TRUE ((int)max3) == ((int)id3) [L834] st3 = 1 [L836] mode3 = 0 [L837] p12_old = p12_new [L838] p12_new = nomsg [L839] p13_old = p13_new [L840] p13_new = nomsg [L841] p21_old = p21_new [L842] p21_new = nomsg [L843] p23_old = p23_new [L844] p23_new = nomsg [L845] p31_old = p31_new [L846] p31_new = nomsg [L847] p32_old = p32_new [L848] p32_new = nomsg [L850] int check__tmp; [L851] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1533] check__tmp = 0 [L879] __return_2419 = check__tmp [L880] main__c1 = __return_2419 [L881] __tmp_2420_0 = main____CPAchecker_TMP_0 [L883] main____CPAchecker_TMP_0 = __tmp_2420_0 [L885] _Bool __tmp_4; [L886] __tmp_4 = main__c1 [L887] _Bool assert__arg; [L888] assert__arg = __tmp_4 [L889] COND TRUE assert__arg == 0 [L891] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 340 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.1s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 24.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7616 SDtfs, 7275 SDslu, 4541 SDs, 0 SdLazy, 8012 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7211occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 10 MinimizatonAttempts, 6824 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1696 NumberOfCodeBlocks, 1696 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1529 ConstructedInterpolants, 0 QuantifiedInterpolants, 819795 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...