/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:05:12,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:05:12,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:05:12,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:05:12,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:05:12,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:05:12,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:05:12,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:05:12,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:05:12,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:05:12,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:05:12,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:05:12,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:05:12,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:05:12,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:05:12,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:05:12,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:05:12,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:05:12,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:05:12,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:05:12,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:05:12,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:05:12,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:05:12,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:05:12,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:05:12,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:05:12,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:05:12,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:05:12,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:05:12,348 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:05:12,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:05:12,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:05:12,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:05:12,350 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:05:12,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:05:12,350 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:05:12,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:05:12,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:05:12,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:05:12,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:05:12,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:05:12,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:05:12,351 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:05:12,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:05:12,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:05:12,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:05:12,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:05:12,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:05:12,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:05:12,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:05:12,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:05:12,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:05:12,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:05:12,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:05:12,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:05:12,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:05:12,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:05:12,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:05:12,354 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:05:12,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:05:12,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:05:12,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:05:12,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:05:12,672 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:05:12,672 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 15:05:12,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12b841d42/ab590a80660d462c962e593969c0106a/FLAG5d94fc14c [2020-08-21 15:05:13,367 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:05:13,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 15:05:13,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12b841d42/ab590a80660d462c962e593969c0106a/FLAG5d94fc14c [2020-08-21 15:05:13,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12b841d42/ab590a80660d462c962e593969c0106a [2020-08-21 15:05:13,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:05:13,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:05:13,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:05:13,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:05:13,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:05:13,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:05:13" (1/1) ... [2020-08-21 15:05:13,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5d3184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:13, skipping insertion in model container [2020-08-21 15:05:13,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:05:13" (1/1) ... [2020-08-21 15:05:13,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:05:13,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:05:14,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:05:14,206 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:05:14,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:05:14,374 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:05:14,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14 WrapperNode [2020-08-21 15:05:14,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:05:14,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:05:14,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:05:14,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:05:14,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... [2020-08-21 15:05:14,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:05:14,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:05:14,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:05:14,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:05:14,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:05:14,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:05:14,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:05:14,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:05:14,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:05:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:05:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:05:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 15:05:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 15:05:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 15:05:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:05:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:05:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 15:05:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 15:05:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 15:05:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 15:05:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 15:05:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 15:05:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 15:05:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:05:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:05:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:05:15,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:05:15,913 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:05:15,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:05:15 BoogieIcfgContainer [2020-08-21 15:05:15,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:05:15,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:05:15,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:05:15,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:05:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:05:13" (1/3) ... [2020-08-21 15:05:15,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccfccc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:05:15, skipping insertion in model container [2020-08-21 15:05:15,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:05:14" (2/3) ... [2020-08-21 15:05:15,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccfccc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:05:15, skipping insertion in model container [2020-08-21 15:05:15,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:05:15" (3/3) ... [2020-08-21 15:05:15,927 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 15:05:15,937 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:05:15,946 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:05:15,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:05:15,985 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:05:15,986 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:05:15,986 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:05:15,986 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:05:15,986 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:05:15,986 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:05:15,987 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:05:15,987 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:05:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2020-08-21 15:05:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-21 15:05:16,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:16,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:16,030 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1095322417, now seen corresponding path program 1 times [2020-08-21 15:05:16,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:16,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911478337] [2020-08-21 15:05:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:16,962 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:16,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:17,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911478337] [2020-08-21 15:05:17,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:17,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:17,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560224955] [2020-08-21 15:05:17,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:17,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:17,067 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2020-08-21 15:05:17,340 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-08-21 15:05:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:18,991 INFO L93 Difference]: Finished difference Result 635 states and 1108 transitions. [2020-08-21 15:05:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:18,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-08-21 15:05:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:19,027 INFO L225 Difference]: With dead ends: 635 [2020-08-21 15:05:19,027 INFO L226 Difference]: Without dead ends: 508 [2020-08-21 15:05:19,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-08-21 15:05:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 506. [2020-08-21 15:05:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-08-21 15:05:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 755 transitions. [2020-08-21 15:05:19,124 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 755 transitions. Word has length 144 [2020-08-21 15:05:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:19,125 INFO L479 AbstractCegarLoop]: Abstraction has 506 states and 755 transitions. [2020-08-21 15:05:19,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 755 transitions. [2020-08-21 15:05:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-21 15:05:19,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:19,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:19,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:05:19,139 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2000756509, now seen corresponding path program 1 times [2020-08-21 15:05:19,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:19,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242026355] [2020-08-21 15:05:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:19,625 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:19,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:19,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242026355] [2020-08-21 15:05:19,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:19,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:19,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785174163] [2020-08-21 15:05:19,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:19,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:19,691 INFO L87 Difference]: Start difference. First operand 506 states and 755 transitions. Second operand 5 states. [2020-08-21 15:05:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:21,989 INFO L93 Difference]: Finished difference Result 1469 states and 2190 transitions. [2020-08-21 15:05:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:21,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-08-21 15:05:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:21,998 INFO L225 Difference]: With dead ends: 1469 [2020-08-21 15:05:21,998 INFO L226 Difference]: Without dead ends: 976 [2020-08-21 15:05:22,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:05:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-08-21 15:05:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2020-08-21 15:05:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 974 states. [2020-08-21 15:05:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1440 transitions. [2020-08-21 15:05:22,074 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1440 transitions. Word has length 144 [2020-08-21 15:05:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:22,075 INFO L479 AbstractCegarLoop]: Abstraction has 974 states and 1440 transitions. [2020-08-21 15:05:22,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:05:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1440 transitions. [2020-08-21 15:05:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 15:05:22,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:22,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:22,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:05:22,083 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1147444865, now seen corresponding path program 1 times [2020-08-21 15:05:22,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:22,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54588568] [2020-08-21 15:05:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:22,338 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:22,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:22,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54588568] [2020-08-21 15:05:22,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:22,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:22,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662902525] [2020-08-21 15:05:22,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:22,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:22,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:22,430 INFO L87 Difference]: Start difference. First operand 974 states and 1440 transitions. Second operand 4 states. [2020-08-21 15:05:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:24,970 INFO L93 Difference]: Finished difference Result 2876 states and 4250 transitions. [2020-08-21 15:05:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:05:24,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-08-21 15:05:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:24,980 INFO L225 Difference]: With dead ends: 2876 [2020-08-21 15:05:24,981 INFO L226 Difference]: Without dead ends: 1934 [2020-08-21 15:05:24,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:24,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-08-21 15:05:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 976. [2020-08-21 15:05:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-08-21 15:05:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1442 transitions. [2020-08-21 15:05:25,060 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1442 transitions. Word has length 145 [2020-08-21 15:05:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:25,061 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1442 transitions. [2020-08-21 15:05:25,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1442 transitions. [2020-08-21 15:05:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:25,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:25,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:25,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:05:25,069 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash 772973737, now seen corresponding path program 1 times [2020-08-21 15:05:25,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:25,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203680147] [2020-08-21 15:05:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:25,485 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:25,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:25,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203680147] [2020-08-21 15:05:25,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:25,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:25,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792695848] [2020-08-21 15:05:25,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:25,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:25,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:25,616 INFO L87 Difference]: Start difference. First operand 976 states and 1442 transitions. Second operand 4 states. [2020-08-21 15:05:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:28,163 INFO L93 Difference]: Finished difference Result 2694 states and 3993 transitions. [2020-08-21 15:05:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:05:28,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 15:05:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:28,176 INFO L225 Difference]: With dead ends: 2694 [2020-08-21 15:05:28,177 INFO L226 Difference]: Without dead ends: 1886 [2020-08-21 15:05:28,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-08-21 15:05:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1884. [2020-08-21 15:05:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-08-21 15:05:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2759 transitions. [2020-08-21 15:05:28,286 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2759 transitions. Word has length 146 [2020-08-21 15:05:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:28,287 INFO L479 AbstractCegarLoop]: Abstraction has 1884 states and 2759 transitions. [2020-08-21 15:05:28,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2759 transitions. [2020-08-21 15:05:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:28,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:28,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:28,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:05:28,292 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -283367418, now seen corresponding path program 1 times [2020-08-21 15:05:28,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:28,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806708712] [2020-08-21 15:05:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:28,709 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:28,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:28,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806708712] [2020-08-21 15:05:28,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:28,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:28,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890765008] [2020-08-21 15:05:28,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:28,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:28,767 INFO L87 Difference]: Start difference. First operand 1884 states and 2759 transitions. Second operand 5 states. [2020-08-21 15:05:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:30,470 INFO L93 Difference]: Finished difference Result 3946 states and 5724 transitions. [2020-08-21 15:05:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:30,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 15:05:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:30,482 INFO L225 Difference]: With dead ends: 3946 [2020-08-21 15:05:30,482 INFO L226 Difference]: Without dead ends: 2020 [2020-08-21 15:05:30,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:05:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-08-21 15:05:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2018. [2020-08-21 15:05:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2018 states. [2020-08-21 15:05:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2909 transitions. [2020-08-21 15:05:30,586 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2909 transitions. Word has length 146 [2020-08-21 15:05:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:30,586 INFO L479 AbstractCegarLoop]: Abstraction has 2018 states and 2909 transitions. [2020-08-21 15:05:30,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:05:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2909 transitions. [2020-08-21 15:05:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 15:05:30,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:30,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:30,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:05:30,591 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:30,592 INFO L82 PathProgramCache]: Analyzing trace with hash -233310428, now seen corresponding path program 1 times [2020-08-21 15:05:30,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:30,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610843722] [2020-08-21 15:05:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:30,916 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:30,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:30,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610843722] [2020-08-21 15:05:30,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:30,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:30,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555824335] [2020-08-21 15:05:30,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:30,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:30,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:30,978 INFO L87 Difference]: Start difference. First operand 2018 states and 2909 transitions. Second operand 5 states. [2020-08-21 15:05:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:33,137 INFO L93 Difference]: Finished difference Result 5812 states and 8329 transitions. [2020-08-21 15:05:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:33,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 15:05:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:33,155 INFO L225 Difference]: With dead ends: 5812 [2020-08-21 15:05:33,155 INFO L226 Difference]: Without dead ends: 3866 [2020-08-21 15:05:33,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:05:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2020-08-21 15:05:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3864. [2020-08-21 15:05:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3864 states. [2020-08-21 15:05:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 5487 transitions. [2020-08-21 15:05:33,477 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 5487 transitions. Word has length 146 [2020-08-21 15:05:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:33,478 INFO L479 AbstractCegarLoop]: Abstraction has 3864 states and 5487 transitions. [2020-08-21 15:05:33,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:05:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 5487 transitions. [2020-08-21 15:05:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 15:05:33,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:33,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:33,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:05:33,488 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:33,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1612159712, now seen corresponding path program 1 times [2020-08-21 15:05:33,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:33,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547539698] [2020-08-21 15:05:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:33,702 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:33,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:33,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547539698] [2020-08-21 15:05:33,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:33,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:05:33,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053822106] [2020-08-21 15:05:33,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:05:33,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:05:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:33,752 INFO L87 Difference]: Start difference. First operand 3864 states and 5487 transitions. Second operand 4 states. [2020-08-21 15:05:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:35,312 INFO L93 Difference]: Finished difference Result 11398 states and 16157 transitions. [2020-08-21 15:05:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:05:35,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-21 15:05:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:35,343 INFO L225 Difference]: With dead ends: 11398 [2020-08-21 15:05:35,344 INFO L226 Difference]: Without dead ends: 7650 [2020-08-21 15:05:35,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:05:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2020-08-21 15:05:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 3876. [2020-08-21 15:05:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3876 states. [2020-08-21 15:05:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 5499 transitions. [2020-08-21 15:05:35,574 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 5499 transitions. Word has length 147 [2020-08-21 15:05:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:35,574 INFO L479 AbstractCegarLoop]: Abstraction has 3876 states and 5499 transitions. [2020-08-21 15:05:35,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:05:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 5499 transitions. [2020-08-21 15:05:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 15:05:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:35,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:35,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:05:35,582 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash -228892187, now seen corresponding path program 1 times [2020-08-21 15:05:35,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:35,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499483809] [2020-08-21 15:05:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:35,891 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:35,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:35,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499483809] [2020-08-21 15:05:35,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:35,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:35,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318101596] [2020-08-21 15:05:35,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:35,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:35,962 INFO L87 Difference]: Start difference. First operand 3876 states and 5499 transitions. Second operand 5 states. [2020-08-21 15:05:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:38,440 INFO L93 Difference]: Finished difference Result 10516 states and 14827 transitions. [2020-08-21 15:05:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:38,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-21 15:05:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:38,465 INFO L225 Difference]: With dead ends: 10516 [2020-08-21 15:05:38,466 INFO L226 Difference]: Without dead ends: 6766 [2020-08-21 15:05:38,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:05:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2020-08-21 15:05:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 6764. [2020-08-21 15:05:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6764 states. [2020-08-21 15:05:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 9415 transitions. [2020-08-21 15:05:38,885 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 9415 transitions. Word has length 148 [2020-08-21 15:05:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:38,885 INFO L479 AbstractCegarLoop]: Abstraction has 6764 states and 9415 transitions. [2020-08-21 15:05:38,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:05:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 9415 transitions. [2020-08-21 15:05:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 15:05:38,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:38,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:05:38,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:05:38,898 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1183404296, now seen corresponding path program 1 times [2020-08-21 15:05:38,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:38,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715816980] [2020-08-21 15:05:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:39,177 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:39,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:39,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715816980] [2020-08-21 15:05:39,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:39,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:39,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247734166] [2020-08-21 15:05:39,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:39,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:39,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:39,224 INFO L87 Difference]: Start difference. First operand 6764 states and 9415 transitions. Second operand 5 states. [2020-08-21 15:05:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:41,707 INFO L93 Difference]: Finished difference Result 18785 states and 26235 transitions. [2020-08-21 15:05:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:41,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 15:05:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:41,733 INFO L225 Difference]: With dead ends: 18785 [2020-08-21 15:05:41,734 INFO L226 Difference]: Without dead ends: 12331 [2020-08-21 15:05:41,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:05:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12331 states. [2020-08-21 15:05:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12331 to 12329. [2020-08-21 15:05:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12329 states. [2020-08-21 15:05:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12329 states to 12329 states and 17040 transitions. [2020-08-21 15:05:42,308 INFO L78 Accepts]: Start accepts. Automaton has 12329 states and 17040 transitions. Word has length 150 [2020-08-21 15:05:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:42,308 INFO L479 AbstractCegarLoop]: Abstraction has 12329 states and 17040 transitions. [2020-08-21 15:05:42,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:05:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12329 states and 17040 transitions. [2020-08-21 15:05:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 15:05:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:42,327 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] [2020-08-21 15:05:42,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:05:42,328 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1614355888, now seen corresponding path program 1 times [2020-08-21 15:05:42,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:42,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108510501] [2020-08-21 15:05:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:42,592 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-08-21 15:05:42,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:05:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:05:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:05:42,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108510501] [2020-08-21 15:05:42,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:05:42,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:05:42,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792001579] [2020-08-21 15:05:42,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:05:42,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:05:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:05:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:05:42,639 INFO L87 Difference]: Start difference. First operand 12329 states and 17040 transitions. Second operand 5 states. [2020-08-21 15:05:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:05:45,151 INFO L93 Difference]: Finished difference Result 18021 states and 24886 transitions. [2020-08-21 15:05:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:05:45,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 15:05:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:05:45,183 INFO L225 Difference]: With dead ends: 18021 [2020-08-21 15:05:45,183 INFO L226 Difference]: Without dead ends: 12331 [2020-08-21 15:05:45,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:05:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12331 states. [2020-08-21 15:05:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12331 to 12076. [2020-08-21 15:05:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12076 states. [2020-08-21 15:05:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12076 states to 12076 states and 16690 transitions. [2020-08-21 15:05:46,295 INFO L78 Accepts]: Start accepts. Automaton has 12076 states and 16690 transitions. Word has length 150 [2020-08-21 15:05:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:05:46,296 INFO L479 AbstractCegarLoop]: Abstraction has 12076 states and 16690 transitions. [2020-08-21 15:05:46,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:05:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12076 states and 16690 transitions. [2020-08-21 15:05:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 15:05:46,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:05:46,311 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] [2020-08-21 15:05:46,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:05:46,311 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:05:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:05:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1163108058, now seen corresponding path program 1 times [2020-08-21 15:05:46,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:05:46,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111456174] [2020-08-21 15:05:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:05:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:05:46,366 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:05:46,366 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:05:46,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:05:46,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:05:46 BoogieIcfgContainer [2020-08-21 15:05:46,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:05:46,428 INFO L168 Benchmark]: Toolchain (without parser) took 32867.66 ms. Allocated memory was 138.4 MB in the beginning and 934.3 MB in the end (delta: 795.9 MB). Free memory was 100.7 MB in the beginning and 668.9 MB in the end (delta: -568.2 MB). Peak memory consumption was 227.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:46,429 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:05:46,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 810.92 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.3 MB in the beginning and 168.2 MB in the end (delta: -68.0 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:46,430 INFO L168 Benchmark]: Boogie Preprocessor took 125.83 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 163.9 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:46,431 INFO L168 Benchmark]: RCFGBuilder took 1417.35 ms. Allocated memory was 202.4 MB in the beginning and 232.8 MB in the end (delta: 30.4 MB). Free memory was 163.9 MB in the beginning and 156.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:46,432 INFO L168 Benchmark]: TraceAbstraction took 30506.53 ms. Allocated memory was 232.8 MB in the beginning and 934.3 MB in the end (delta: 701.5 MB). Free memory was 155.3 MB in the beginning and 668.9 MB in the end (delta: -513.6 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:05:46,435 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 810.92 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.3 MB in the beginning and 168.2 MB in the end (delta: -68.0 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.83 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 163.9 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1417.35 ms. Allocated memory was 202.4 MB in the beginning and 232.8 MB in the end (delta: 30.4 MB). Free memory was 163.9 MB in the beginning and 156.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30506.53 ms. Allocated memory was 232.8 MB in the beginning and 934.3 MB in the end (delta: 701.5 MB). Free memory was 155.3 MB in the beginning and 668.9 MB in the end (delta: -513.6 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 832]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L15] msg_t nomsg = (msg_t )-1; [L16] port_t p12 = 0; [L17] char p12_old = '\x0'; [L18] char p12_new = '\x0'; [L19] _Bool ep12 = 0; [L20] port_t p13 = 0; [L21] char p13_old = '\x0'; [L22] char p13_new = '\x0'; [L23] _Bool ep13 = 0; [L24] port_t p21 = 0; [L25] char p21_old = '\x0'; [L26] char p21_new = '\x0'; [L27] _Bool ep21 = 0; [L28] port_t p23 = 0; [L29] char p23_old = '\x0'; [L30] char p23_new = '\x0'; [L31] _Bool ep23 = 0; [L32] port_t p31 = 0; [L33] char p31_old = '\x0'; [L34] char p31_new = '\x0'; [L35] _Bool ep31 = 0; [L36] port_t p32 = 0; [L37] char p32_old = '\x0'; [L38] char p32_new = '\x0'; [L39] _Bool ep32 = 0; [L40] char id1 = '\x0'; [L41] unsigned char r1 = '\x0'; [L42] char st1 = '\x0'; [L43] char nl1 = '\x0'; [L44] char m1 = '\x0'; [L45] char max1 = '\x0'; [L46] _Bool mode1 = 0; [L47] char id2 = '\x0'; [L48] unsigned char r2 = '\x0'; [L49] char st2 = '\x0'; [L50] char nl2 = '\x0'; [L51] char m2 = '\x0'; [L52] char max2 = '\x0'; [L53] _Bool mode2 = 0; [L54] char id3 = '\x0'; [L55] unsigned char r3 = '\x0'; [L56] char st3 = '\x0'; [L57] char nl3 = '\x0'; [L58] char m3 = '\x0'; [L59] char max3 = '\x0'; [L60] _Bool mode3 = 0; [L64] void (*nodes[3])() = { &node1, &node2, &node3 }; [L68] int __return_1718; [L69] int __return_1846; [L70] int __return_1964; [L71] int __return_2082; [L72] int __return_2205; [L73] int __return_2315; [L76] int main__c1; [L77] int main__i2; [L78] main__c1 = 0 [L79] ep12 = __VERIFIER_nondet_bool() [L80] ep13 = __VERIFIER_nondet_bool() [L81] ep21 = __VERIFIER_nondet_bool() [L82] ep23 = __VERIFIER_nondet_bool() [L83] ep31 = __VERIFIER_nondet_bool() [L84] ep32 = __VERIFIER_nondet_bool() [L85] id1 = __VERIFIER_nondet_char() [L86] r1 = __VERIFIER_nondet_uchar() [L87] st1 = __VERIFIER_nondet_char() [L88] nl1 = __VERIFIER_nondet_char() [L89] m1 = __VERIFIER_nondet_char() [L90] max1 = __VERIFIER_nondet_char() [L91] mode1 = __VERIFIER_nondet_bool() [L92] id2 = __VERIFIER_nondet_char() [L93] r2 = __VERIFIER_nondet_uchar() [L94] st2 = __VERIFIER_nondet_char() [L95] nl2 = __VERIFIER_nondet_char() [L96] m2 = __VERIFIER_nondet_char() [L97] max2 = __VERIFIER_nondet_char() [L98] mode2 = __VERIFIER_nondet_bool() [L99] id3 = __VERIFIER_nondet_char() [L100] r3 = __VERIFIER_nondet_uchar() [L101] st3 = __VERIFIER_nondet_char() [L102] nl3 = __VERIFIER_nondet_char() [L103] m3 = __VERIFIER_nondet_char() [L104] max3 = __VERIFIER_nondet_char() [L105] mode3 = __VERIFIER_nondet_bool() [L107] _Bool init__r121; [L108] _Bool init__r131; [L109] _Bool init__r211; [L110] _Bool init__r231; [L111] _Bool init__r311; [L112] _Bool init__r321; [L113] _Bool init__r122; [L114] int init__tmp; [L115] _Bool init__r132; [L116] int init__tmp___0; [L117] _Bool init__r212; [L118] int init__tmp___1; [L119] _Bool init__r232; [L120] int init__tmp___2; [L121] _Bool init__r312; [L122] int init__tmp___3; [L123] _Bool init__r322; [L124] int init__tmp___4; [L125] int init__tmp___5; [L126] init__r121 = ep12 [L127] init__r131 = ep13 [L128] init__r211 = ep21 [L129] init__r231 = ep23 [L130] init__r311 = ep31 [L131] init__r321 = ep32 [L132] COND FALSE !(!(init__r121 == 0)) [L2244] COND FALSE !(!(init__r131 == 0)) [L2260] init__tmp = 0 [L136] init__r122 = (_Bool)init__tmp [L137] COND FALSE !(!(init__r131 == 0)) [L2221] COND FALSE !(!(init__r121 == 0)) [L2237] init__tmp___0 = 0 [L141] init__r132 = (_Bool)init__tmp___0 [L142] COND FALSE !(!(init__r211 == 0)) [L2198] COND FALSE !(!(init__r231 == 0)) [L2214] init__tmp___1 = 0 [L146] init__r212 = (_Bool)init__tmp___1 [L147] COND FALSE !(!(init__r231 == 0)) [L2175] COND FALSE !(!(init__r211 == 0)) [L2191] init__tmp___2 = 0 [L151] init__r232 = (_Bool)init__tmp___2 [L152] COND FALSE !(!(init__r311 == 0)) [L2152] COND FALSE !(!(init__r321 == 0)) [L2168] init__tmp___3 = 0 [L156] init__r312 = (_Bool)init__tmp___3 [L157] COND FALSE !(!(init__r321 == 0)) [L2129] COND FALSE !(!(init__r311 == 0)) [L2145] init__tmp___4 = 0 [L161] init__r322 = (_Bool)init__tmp___4 [L162] COND TRUE ((int)id1) != ((int)id2) [L164] COND TRUE ((int)id1) != ((int)id3) [L166] COND TRUE ((int)id2) != ((int)id3) [L168] COND TRUE ((int)id1) >= 0 [L170] COND TRUE ((int)id2) >= 0 [L172] COND TRUE ((int)id3) >= 0 [L174] COND TRUE ((int)r1) == 0 [L176] COND TRUE ((int)r2) == 0 [L178] COND TRUE ((int)r3) == 0 [L180] COND TRUE ((int)max1) == ((int)id1) [L182] COND TRUE ((int)max2) == ((int)id2) [L184] COND TRUE ((int)max3) == ((int)id3) [L186] COND TRUE ((int)st1) == 0 [L188] COND TRUE ((int)st2) == 0 [L190] COND TRUE ((int)st3) == 0 [L192] COND TRUE ((int)nl1) == 0 [L194] COND TRUE ((int)nl2) == 0 [L196] COND TRUE ((int)nl3) == 0 [L198] COND TRUE ((int)mode1) == 0 [L200] COND TRUE ((int)mode2) == 0 [L202] COND TRUE ((int)mode3) == 0 [L204] init__tmp___5 = 1 [L205] __return_1718 = init__tmp___5 [L206] main__i2 = __return_1718 [L207] COND TRUE main__i2 != 0 [L209] p12_old = nomsg [L210] p12_new = nomsg [L211] p13_old = nomsg [L212] p13_new = nomsg [L213] p21_old = nomsg [L214] p21_new = nomsg [L215] p23_old = nomsg [L216] p23_new = nomsg [L217] p31_old = nomsg [L218] p31_new = nomsg [L219] p32_old = nomsg [L220] p32_new = nomsg [L221] main__i2 = 0 [L223] COND FALSE !(!(mode1 == 0)) [L229] COND TRUE ((int)r1) < 2 [L231] COND FALSE !(!(ep12 == 0)) [L242] COND FALSE !(!(ep13 == 0)) [L253] mode1 = 1 [L255] COND FALSE !(!(mode2 == 0)) [L261] COND TRUE ((int)r2) < 2 [L263] COND FALSE !(!(ep21 == 0)) [L274] COND FALSE !(!(ep23 == 0)) [L285] mode2 = 1 [L287] COND FALSE !(!(mode3 == 0)) [L293] COND TRUE ((int)r3) < 2 [L295] COND FALSE !(!(ep31 == 0)) [L306] COND FALSE !(!(ep32 == 0)) [L317] mode3 = 1 [L318] p12_old = p12_new [L319] p12_new = nomsg [L320] p13_old = p13_new [L321] p13_new = nomsg [L322] p21_old = p21_new [L323] p21_new = nomsg [L324] p23_old = p23_new [L325] p23_new = nomsg [L326] p31_old = p31_new [L327] p31_new = nomsg [L328] p32_old = p32_new [L329] p32_new = nomsg [L331] int check__tmp; [L332] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L334] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L336] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L338] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L340] COND FALSE !(((int)r1) >= 2) [L346] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L348] COND TRUE ((int)r1) < 2 [L350] COND FALSE !(((int)r1) >= 2) [L356] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L358] COND TRUE ((int)r1) < 2 [L360] check__tmp = 1 [L361] __return_1846 = check__tmp [L362] main__c1 = __return_1846 [L364] _Bool __tmp_1; [L365] __tmp_1 = main__c1 [L366] _Bool assert__arg; [L367] assert__arg = __tmp_1 [L368] COND FALSE !(assert__arg == 0) [L375] COND TRUE !(mode1 == 0) [L377] COND FALSE !(r1 == 255) [L383] r1 = r1 + 1 [L384] COND FALSE !(!(ep21 == 0)) [L392] COND FALSE !(!(ep31 == 0)) [L400] COND FALSE !(((int)r1) == 2) [L406] mode1 = 0 [L408] COND TRUE !(mode2 == 0) [L410] COND FALSE !(r2 == 255) [L416] r2 = r2 + 1 [L417] COND FALSE !(!(ep12 == 0)) [L425] COND FALSE !(!(ep32 == 0)) [L433] COND FALSE !(((int)r2) == 2) [L439] mode2 = 0 [L441] COND TRUE !(mode3 == 0) [L443] COND FALSE !(r3 == 255) [L449] r3 = r3 + 1 [L450] COND FALSE !(!(ep13 == 0)) [L458] COND FALSE !(!(ep23 == 0)) [L466] COND FALSE !(((int)r3) == 2) [L472] mode3 = 0 [L473] p12_old = p12_new [L474] p12_new = nomsg [L475] p13_old = p13_new [L476] p13_new = nomsg [L477] p21_old = p21_new [L478] p21_new = nomsg [L479] p23_old = p23_new [L480] p23_new = nomsg [L481] p31_old = p31_new [L482] p31_new = nomsg [L483] p32_old = p32_new [L484] p32_new = nomsg [L486] int check__tmp; [L487] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L489] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L491] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L493] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L495] COND FALSE !(((int)r1) >= 2) [L501] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L503] COND TRUE ((int)r1) < 2 [L505] COND FALSE !(((int)r1) >= 2) [L511] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L513] COND TRUE ((int)r1) < 2 [L515] check__tmp = 1 [L516] __return_1964 = check__tmp [L517] main__c1 = __return_1964 [L519] _Bool __tmp_2; [L520] __tmp_2 = main__c1 [L521] _Bool assert__arg; [L522] assert__arg = __tmp_2 [L523] COND FALSE !(assert__arg == 0) [L530] COND FALSE !(!(mode1 == 0)) [L536] COND TRUE ((int)r1) < 2 [L538] COND FALSE !(!(ep12 == 0)) [L549] COND FALSE !(!(ep13 == 0)) [L560] mode1 = 1 [L562] COND FALSE !(!(mode2 == 0)) [L568] COND TRUE ((int)r2) < 2 [L570] COND FALSE !(!(ep21 == 0)) [L581] COND FALSE !(!(ep23 == 0)) [L592] mode2 = 1 [L594] COND FALSE !(!(mode3 == 0)) [L600] COND TRUE ((int)r3) < 2 [L602] COND FALSE !(!(ep31 == 0)) [L613] COND FALSE !(!(ep32 == 0)) [L624] mode3 = 1 [L625] p12_old = p12_new [L626] p12_new = nomsg [L627] p13_old = p13_new [L628] p13_new = nomsg [L629] p21_old = p21_new [L630] p21_new = nomsg [L631] p23_old = p23_new [L632] p23_new = nomsg [L633] p31_old = p31_new [L634] p31_new = nomsg [L635] p32_old = p32_new [L636] p32_new = nomsg [L638] int check__tmp; [L639] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L641] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L643] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L645] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L647] COND FALSE !(((int)r1) >= 2) [L653] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L655] COND TRUE ((int)r1) < 2 [L657] COND FALSE !(((int)r1) >= 2) [L663] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L665] COND TRUE ((int)r1) < 2 [L667] check__tmp = 1 [L668] __return_2082 = check__tmp [L669] main__c1 = __return_2082 [L671] _Bool __tmp_3; [L672] __tmp_3 = main__c1 [L673] _Bool assert__arg; [L674] assert__arg = __tmp_3 [L675] COND FALSE !(assert__arg == 0) [L682] COND TRUE !(mode1 == 0) [L684] COND FALSE !(r1 == 255) [L690] r1 = r1 + 1 [L691] COND FALSE !(!(ep21 == 0)) [L699] COND FALSE !(!(ep31 == 0)) [L707] COND TRUE ((int)r1) == 2 [L709] COND TRUE ((int)max1) == ((int)id1) [L711] st1 = 1 [L713] mode1 = 0 [L715] COND TRUE !(mode2 == 0) [L717] COND FALSE !(r2 == 255) [L723] r2 = r2 + 1 [L724] COND FALSE !(!(ep12 == 0)) [L732] COND FALSE !(!(ep32 == 0)) [L740] COND TRUE ((int)r2) == 2 [L742] COND TRUE ((int)max2) == ((int)id2) [L744] st2 = 1 [L746] mode2 = 0 [L748] COND TRUE !(mode3 == 0) [L750] COND FALSE !(r3 == 255) [L756] r3 = r3 + 1 [L757] COND FALSE !(!(ep13 == 0)) [L765] COND FALSE !(!(ep23 == 0)) [L773] COND TRUE ((int)r3) == 2 [L775] COND TRUE ((int)max3) == ((int)id3) [L777] st3 = 1 [L779] mode3 = 0 [L780] p12_old = p12_new [L781] p12_new = nomsg [L782] p13_old = p13_new [L783] p13_new = nomsg [L784] p21_old = p21_new [L785] p21_new = nomsg [L786] p23_old = p23_new [L787] p23_new = nomsg [L788] p31_old = p31_new [L789] p31_new = nomsg [L790] p32_old = p32_new [L791] p32_new = nomsg [L793] int check__tmp; [L794] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1433] check__tmp = 0 [L822] __return_2205 = check__tmp [L823] main__c1 = __return_2205 [L826] _Bool __tmp_4; [L827] __tmp_4 = main__c1 [L828] _Bool assert__arg; [L829] assert__arg = __tmp_4 [L830] COND TRUE assert__arg == 0 [L832] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 315 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.3s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 22.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7042 SDtfs, 7164 SDslu, 4179 SDs, 0 SdLazy, 7492 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12329occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 5001 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1616 NumberOfCodeBlocks, 1616 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1456 ConstructedInterpolants, 0 QuantifiedInterpolants, 777929 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...