/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:46:37,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:46:37,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:46:37,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 18:46:37,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:46:37,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:46:37,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:46:37,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:46:37,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:46:37,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:46:37,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:46:37,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:46:37,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:46:37,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:46:37,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:46:37,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:46:37,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:46:37,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:46:37,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:46:37,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:46:37,580 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 18:46:37,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:46:37,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:46:37,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:46:37,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:46:37,620 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:46:37,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:46:37,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:46:37,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:46:37,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:46:37,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:46:37,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:46:37,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:46:37,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:46:37,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:46:37,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:46:37,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:46:37,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:46:37,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:46:37,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:46:37,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:46:37,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:46:37,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:46:37,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:46:37,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:46:37,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:46:37,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:46:37,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:46:37,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:46:37,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:46:37,627 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:46:37,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:46:37,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:46:37,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:46:38,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:46:38,002 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:46:38,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2020-08-18 18:46:38,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3e7a7d9d/38785806ebb64e9db9f84c10a83135ec/FLAG2453f0ec6 [2020-08-18 18:46:38,561 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:46:38,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_security.c [2020-08-18 18:46:38,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3e7a7d9d/38785806ebb64e9db9f84c10a83135ec/FLAG2453f0ec6 [2020-08-18 18:46:38,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3e7a7d9d/38785806ebb64e9db9f84c10a83135ec [2020-08-18 18:46:38,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:46:38,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:46:38,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:46:38,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:46:38,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:46:38,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:46:38" (1/1) ... [2020-08-18 18:46:38,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac0f60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:38, skipping insertion in model container [2020-08-18 18:46:38,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:46:38" (1/1) ... [2020-08-18 18:46:38,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:46:38,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:46:39,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:46:39,219 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:46:39,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:46:39,358 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:46:39,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39 WrapperNode [2020-08-18 18:46:39,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:46:39,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:46:39,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:46:39,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:46:39,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (1/1) ... [2020-08-18 18:46:39,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:46:39,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:46:39,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:46:39,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:46:39,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (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 18:46:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:46:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:46:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:46:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:46:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:46:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:46:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:46:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:46:40,024 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:46:40,025 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-08-18 18:46:40,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:46:40 BoogieIcfgContainer [2020-08-18 18:46:40,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:46:40,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:46:40,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:46:40,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:46:40,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:46:38" (1/3) ... [2020-08-18 18:46:40,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e1612b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:46:40, skipping insertion in model container [2020-08-18 18:46:40,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:46:39" (2/3) ... [2020-08-18 18:46:40,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e1612b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:46:40, skipping insertion in model container [2020-08-18 18:46:40,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:46:40" (3/3) ... [2020-08-18 18:46:40,038 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2020-08-18 18:46:40,049 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:46:40,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:46:40,072 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:46:40,097 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:46:40,098 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:46:40,098 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:46:40,098 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:46:40,098 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:46:40,099 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:46:40,099 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:46:40,099 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:46:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-08-18 18:46:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:46:40,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:40,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:46:40,130 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:40,137 INFO L82 PathProgramCache]: Analyzing trace with hash -105811556, now seen corresponding path program 1 times [2020-08-18 18:46:40,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:40,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743732071] [2020-08-18 18:46:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:40,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:40,345 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 18:46:40,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743732071] [2020-08-18 18:46:40,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:40,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:46:40,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202155542] [2020-08-18 18:46:40,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:46:40,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:40,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:46:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:46:40,375 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 3 states. [2020-08-18 18:46:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:40,433 INFO L93 Difference]: Finished difference Result 160 states and 298 transitions. [2020-08-18 18:46:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:46:40,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-18 18:46:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:40,448 INFO L225 Difference]: With dead ends: 160 [2020-08-18 18:46:40,449 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 18:46:40,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:46:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 18:46:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 18:46:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 18:46:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 113 transitions. [2020-08-18 18:46:40,504 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 113 transitions. Word has length 13 [2020-08-18 18:46:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:40,505 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 113 transitions. [2020-08-18 18:46:40,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:46:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 113 transitions. [2020-08-18 18:46:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 18:46:40,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:40,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:46:40,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:46:40,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:40,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1547300989, now seen corresponding path program 1 times [2020-08-18 18:46:40,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:40,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773791418] [2020-08-18 18:46:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:40,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:40,595 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 18:46:40,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773791418] [2020-08-18 18:46:40,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:40,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:40,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450694516] [2020-08-18 18:46:40,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:40,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:40,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:40,600 INFO L87 Difference]: Start difference. First operand 78 states and 113 transitions. Second operand 4 states. [2020-08-18 18:46:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:40,885 INFO L93 Difference]: Finished difference Result 153 states and 224 transitions. [2020-08-18 18:46:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:40,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 18:46:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:40,887 INFO L225 Difference]: With dead ends: 153 [2020-08-18 18:46:40,887 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 18:46:40,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 18:46:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-18 18:46:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 18:46:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2020-08-18 18:46:40,901 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 14 [2020-08-18 18:46:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:40,902 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2020-08-18 18:46:40,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2020-08-18 18:46:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:46:40,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:40,904 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:46:40,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:46:40,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 555004895, now seen corresponding path program 1 times [2020-08-18 18:46:40,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:40,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392815606] [2020-08-18 18:46:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:46:40,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392815606] [2020-08-18 18:46:40,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:40,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:40,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565006749] [2020-08-18 18:46:40,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:40,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:40,966 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand 4 states. [2020-08-18 18:46:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:41,051 INFO L93 Difference]: Finished difference Result 146 states and 213 transitions. [2020-08-18 18:46:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:41,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 18:46:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:41,053 INFO L225 Difference]: With dead ends: 146 [2020-08-18 18:46:41,053 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 18:46:41,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 18:46:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 18:46:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 18:46:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 102 transitions. [2020-08-18 18:46:41,064 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 102 transitions. Word has length 19 [2020-08-18 18:46:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:41,064 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 102 transitions. [2020-08-18 18:46:41,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 102 transitions. [2020-08-18 18:46:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:46:41,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:41,066 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:46:41,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:46:41,067 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:41,067 INFO L82 PathProgramCache]: Analyzing trace with hash -624681896, now seen corresponding path program 1 times [2020-08-18 18:46:41,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:41,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932046529] [2020-08-18 18:46:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:46:41,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932046529] [2020-08-18 18:46:41,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:41,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:41,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272135019] [2020-08-18 18:46:41,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:41,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:41,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:41,169 INFO L87 Difference]: Start difference. First operand 72 states and 102 transitions. Second operand 4 states. [2020-08-18 18:46:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:41,445 INFO L93 Difference]: Finished difference Result 192 states and 280 transitions. [2020-08-18 18:46:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:41,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-18 18:46:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:41,447 INFO L225 Difference]: With dead ends: 192 [2020-08-18 18:46:41,447 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 18:46:41,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 18:46:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-08-18 18:46:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 18:46:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-18 18:46:41,463 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 22 [2020-08-18 18:46:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:41,463 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-18 18:46:41,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-18 18:46:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:46:41,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:41,465 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:46:41,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:46:41,465 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:41,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598883, now seen corresponding path program 1 times [2020-08-18 18:46:41,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:41,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76946154] [2020-08-18 18:46:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:46:41,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76946154] [2020-08-18 18:46:41,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:41,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:41,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153398414] [2020-08-18 18:46:41,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:41,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:41,516 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 4 states. [2020-08-18 18:46:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:41,670 INFO L93 Difference]: Finished difference Result 183 states and 260 transitions. [2020-08-18 18:46:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:41,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-08-18 18:46:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:41,672 INFO L225 Difference]: With dead ends: 183 [2020-08-18 18:46:41,672 INFO L226 Difference]: Without dead ends: 87 [2020-08-18 18:46:41,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-18 18:46:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-08-18 18:46:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 18:46:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2020-08-18 18:46:41,683 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 23 [2020-08-18 18:46:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:41,684 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2020-08-18 18:46:41,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2020-08-18 18:46:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 18:46:41,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:41,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:46:41,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:46:41,686 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:41,687 INFO L82 PathProgramCache]: Analyzing trace with hash -576284788, now seen corresponding path program 1 times [2020-08-18 18:46:41,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:41,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856762807] [2020-08-18 18:46:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:46:41,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856762807] [2020-08-18 18:46:41,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:41,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:41,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436789438] [2020-08-18 18:46:41,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:41,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:41,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:41,750 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 4 states. [2020-08-18 18:46:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:41,834 INFO L93 Difference]: Finished difference Result 134 states and 190 transitions. [2020-08-18 18:46:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:41,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-18 18:46:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:41,837 INFO L225 Difference]: With dead ends: 134 [2020-08-18 18:46:41,837 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 18:46:41,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 18:46:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 18:46:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 18:46:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2020-08-18 18:46:41,846 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 29 [2020-08-18 18:46:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:41,846 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2020-08-18 18:46:41,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2020-08-18 18:46:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 18:46:41,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:41,848 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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 18:46:41,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:46:41,848 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -31288535, now seen corresponding path program 1 times [2020-08-18 18:46:41,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:41,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925026934] [2020-08-18 18:46:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:46:41,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925026934] [2020-08-18 18:46:41,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:41,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:41,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354947162] [2020-08-18 18:46:41,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:41,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:41,899 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand 4 states. [2020-08-18 18:46:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:42,092 INFO L93 Difference]: Finished difference Result 158 states and 228 transitions. [2020-08-18 18:46:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:42,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-18 18:46:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:42,094 INFO L225 Difference]: With dead ends: 158 [2020-08-18 18:46:42,094 INFO L226 Difference]: Without dead ends: 111 [2020-08-18 18:46:42,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-18 18:46:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-18 18:46:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 18:46:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 138 transitions. [2020-08-18 18:46:42,104 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 138 transitions. Word has length 30 [2020-08-18 18:46:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:42,105 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 138 transitions. [2020-08-18 18:46:42,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 138 transitions. [2020-08-18 18:46:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 18:46:42,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:42,107 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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 18:46:42,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:46:42,107 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash 180888733, now seen corresponding path program 1 times [2020-08-18 18:46:42,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:42,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20222933] [2020-08-18 18:46:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:46:42,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20222933] [2020-08-18 18:46:42,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:42,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:42,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385200470] [2020-08-18 18:46:42,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:42,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:42,155 INFO L87 Difference]: Start difference. First operand 99 states and 138 transitions. Second operand 4 states. [2020-08-18 18:46:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:42,264 INFO L93 Difference]: Finished difference Result 166 states and 232 transitions. [2020-08-18 18:46:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:42,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-18 18:46:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:42,266 INFO L225 Difference]: With dead ends: 166 [2020-08-18 18:46:42,266 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 18:46:42,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 18:46:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-08-18 18:46:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-18 18:46:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2020-08-18 18:46:42,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 31 [2020-08-18 18:46:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:42,276 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2020-08-18 18:46:42,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2020-08-18 18:46:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 18:46:42,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:42,277 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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 18:46:42,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:46:42,278 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:42,278 INFO L82 PathProgramCache]: Analyzing trace with hash 317242888, now seen corresponding path program 1 times [2020-08-18 18:46:42,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:42,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853328195] [2020-08-18 18:46:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:46:42,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853328195] [2020-08-18 18:46:42,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:42,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:42,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524627913] [2020-08-18 18:46:42,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:42,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:42,320 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 4 states. [2020-08-18 18:46:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:42,453 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2020-08-18 18:46:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:42,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-18 18:46:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:42,455 INFO L225 Difference]: With dead ends: 139 [2020-08-18 18:46:42,455 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 18:46:42,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 18:46:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 18:46:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 18:46:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2020-08-18 18:46:42,472 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 31 [2020-08-18 18:46:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:42,473 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2020-08-18 18:46:42,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2020-08-18 18:46:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 18:46:42,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:42,475 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 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 18:46:42,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:46:42,475 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1695196396, now seen corresponding path program 1 times [2020-08-18 18:46:42,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:42,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780453777] [2020-08-18 18:46:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:46:42,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780453777] [2020-08-18 18:46:42,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:42,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:42,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026920415] [2020-08-18 18:46:42,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:42,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:42,523 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand 4 states. [2020-08-18 18:46:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:42,632 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-08-18 18:46:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:42,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-18 18:46:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:42,634 INFO L225 Difference]: With dead ends: 74 [2020-08-18 18:46:42,634 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 18:46:42,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 18:46:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 18:46:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 18:46:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2020-08-18 18:46:42,640 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 32 [2020-08-18 18:46:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:42,640 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2020-08-18 18:46:42,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2020-08-18 18:46:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 18:46:42,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:46:42,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 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 18:46:42,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:46:42,642 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:46:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:46:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1000030502, now seen corresponding path program 1 times [2020-08-18 18:46:42,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:46:42,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857883227] [2020-08-18 18:46:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:46:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:46:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:46:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:46:42,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857883227] [2020-08-18 18:46:42,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:46:42,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:46:42,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829471379] [2020-08-18 18:46:42,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:46:42,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:46:42,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:46:42,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:46:42,689 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 4 states. [2020-08-18 18:46:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:46:42,788 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2020-08-18 18:46:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:46:42,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-18 18:46:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:46:42,789 INFO L225 Difference]: With dead ends: 111 [2020-08-18 18:46:42,789 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:46:42,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:46:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:46:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:46:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:46:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:46:42,791 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-08-18 18:46:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:46:42,791 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:46:42,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:46:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:46:42,792 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:46:42,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:46:42,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:46:42,948 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:46:42,949 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~m_update~0 |old(~m_update~0)|) (= ~m_initSign~0 |old(~m_initSign~0)|) (= ~m_sign~0 |old(~m_sign~0)|) (= ~m_verify~0 |old(~m_verify~0)|) (= ~m_Signature~0 |old(~m_Signature~0)|) (= ~m_initVerify~0 |old(~m_initVerify~0)|)) [2020-08-18 18:46:42,949 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:46:42,949 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:46:42,949 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:46:42,949 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point L316(lines 316 331) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point L283(lines 283 382) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point L250(lines 250 261) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 390) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point L184(lines 184 199) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point L118(lines 118 129) no Hoare annotation was computed. [2020-08-18 18:46:42,950 INFO L268 CegarLoopResult]: For program point L366(lines 366 377) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L300(lines 300 315) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L234(lines 234 245) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L102(lines 102 113) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L350(lines 350 361) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L284(lines 284 299) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L218(lines 218 229) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L86(lines 86 88) no Hoare annotation was computed. [2020-08-18 18:46:42,951 INFO L268 CegarLoopResult]: For program point L334(lines 334 345) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L202(lines 202 213) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L70(lines 70 72) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L318(lines 318 329) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L186(lines 186 197) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L54(lines 54 56) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L302(lines 302 313) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 390) no Hoare annotation was computed. [2020-08-18 18:46:42,952 INFO L268 CegarLoopResult]: For program point L170(lines 170 172) no Hoare annotation was computed. [2020-08-18 18:46:42,953 INFO L268 CegarLoopResult]: For program point L286(lines 286 297) no Hoare annotation was computed. [2020-08-18 18:46:42,953 INFO L268 CegarLoopResult]: For program point L154(lines 154 156) no Hoare annotation was computed. [2020-08-18 18:46:42,953 INFO L264 CegarLoopResult]: At program point L22-2(lines 22 385) the Hoare annotation is: (or (and (<= main_~this_state~0 0) (= main_~q~0 0)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0))) [2020-08-18 18:46:42,953 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 385) no Hoare annotation was computed. [2020-08-18 18:46:42,953 INFO L268 CegarLoopResult]: For program point L270(lines 270 272) no Hoare annotation was computed. [2020-08-18 18:46:42,953 INFO L268 CegarLoopResult]: For program point L138(lines 138 140) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L254(lines 254 256) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L370(lines 370 372) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L238(lines 238 240) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L106(lines 106 108) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L354(lines 354 356) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L268 CegarLoopResult]: For program point L222(lines 222 224) no Hoare annotation was computed. [2020-08-18 18:46:42,954 INFO L264 CegarLoopResult]: At program point L371(lines 13 390) the Hoare annotation is: false [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L338(lines 338 340) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L206(lines 206 208) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L322(lines 322 324) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L190(lines 190 192) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L306(lines 306 308) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L290(lines 290 292) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L27(lines 27 46) no Hoare annotation was computed. [2020-08-18 18:46:42,955 INFO L268 CegarLoopResult]: For program point L28(lines 28 43) no Hoare annotation was computed. [2020-08-18 18:46:42,956 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 389) no Hoare annotation was computed. [2020-08-18 18:46:42,956 INFO L268 CegarLoopResult]: For program point L30(lines 30 41) no Hoare annotation was computed. [2020-08-18 18:46:42,956 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 390) the Hoare annotation is: true [2020-08-18 18:46:42,956 INFO L268 CegarLoopResult]: For program point L80(lines 80 95) no Hoare annotation was computed. [2020-08-18 18:46:42,956 INFO L268 CegarLoopResult]: For program point L47(lines 47 98) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L64(lines 64 79) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L48(lines 48 63) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L164(lines 164 179) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L148(lines 148 163) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L82(lines 82 93) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L264(lines 264 279) no Hoare annotation was computed. [2020-08-18 18:46:42,957 INFO L268 CegarLoopResult]: For program point L132(lines 132 147) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L99(lines 99 182) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L66(lines 66 77) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L248(lines 248 263) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L116(lines 116 131) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L50(lines 50 61) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L364(lines 364 379) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L232(lines 232 247) no Hoare annotation was computed. [2020-08-18 18:46:42,958 INFO L268 CegarLoopResult]: For program point L166(lines 166 177) no Hoare annotation was computed. [2020-08-18 18:46:42,959 INFO L268 CegarLoopResult]: For program point L100(lines 100 115) no Hoare annotation was computed. [2020-08-18 18:46:42,959 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-08-18 18:46:42,959 INFO L264 CegarLoopResult]: At program point L381(lines 22 385) the Hoare annotation is: (let ((.cse0 (<= main_~this_state~0 0))) (or (and .cse0 (= main_~q~0 0)) (and .cse0 (= main_~q~0 2)) (and (= main_~q~0 3) (= 2 main_~this_state~0)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)))) [2020-08-18 18:46:42,959 INFO L268 CegarLoopResult]: For program point L348(lines 348 363) no Hoare annotation was computed. [2020-08-18 18:46:42,959 INFO L268 CegarLoopResult]: For program point L216(lines 216 231) no Hoare annotation was computed. [2020-08-18 18:46:42,959 INFO L268 CegarLoopResult]: For program point L183(lines 183 282) no Hoare annotation was computed. [2020-08-18 18:46:42,959 INFO L268 CegarLoopResult]: For program point L150(lines 150 161) no Hoare annotation was computed. [2020-08-18 18:46:42,960 INFO L268 CegarLoopResult]: For program point L332(lines 332 347) no Hoare annotation was computed. [2020-08-18 18:46:42,960 INFO L268 CegarLoopResult]: For program point L266(lines 266 277) no Hoare annotation was computed. [2020-08-18 18:46:42,960 INFO L268 CegarLoopResult]: For program point L200(lines 200 215) no Hoare annotation was computed. [2020-08-18 18:46:42,960 INFO L268 CegarLoopResult]: For program point L134(lines 134 145) no Hoare annotation was computed. [2020-08-18 18:46:42,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:46:42 BoogieIcfgContainer [2020-08-18 18:46:42,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:46:42,982 INFO L168 Benchmark]: Toolchain (without parser) took 4070.22 ms. Allocated memory was 144.2 MB in the beginning and 248.0 MB in the end (delta: 103.8 MB). Free memory was 106.0 MB in the beginning and 134.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 75.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:46:42,983 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 124.4 MB in the beginning and 124.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:46:42,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 447.33 ms. Allocated memory was 144.2 MB in the beginning and 206.0 MB in the end (delta: 61.9 MB). Free memory was 105.8 MB in the beginning and 184.0 MB in the end (delta: -78.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:46:42,985 INFO L168 Benchmark]: Boogie Preprocessor took 49.39 ms. Allocated memory is still 206.0 MB. Free memory was 184.0 MB in the beginning and 181.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:46:42,986 INFO L168 Benchmark]: RCFGBuilder took 619.16 ms. Allocated memory is still 206.0 MB. Free memory was 181.6 MB in the beginning and 153.5 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:46:42,987 INFO L168 Benchmark]: TraceAbstraction took 2949.06 ms. Allocated memory was 206.0 MB in the beginning and 248.0 MB in the end (delta: 41.9 MB). Free memory was 152.9 MB in the beginning and 134.2 MB in the end (delta: 18.7 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:46:42,991 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 124.4 MB in the beginning and 124.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 447.33 ms. Allocated memory was 144.2 MB in the beginning and 206.0 MB in the end (delta: 61.9 MB). Free memory was 105.8 MB in the beginning and 184.0 MB in the end (delta: -78.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.39 ms. Allocated memory is still 206.0 MB. Free memory was 184.0 MB in the beginning and 181.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 619.16 ms. Allocated memory is still 206.0 MB. Free memory was 181.6 MB in the beginning and 153.5 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2949.06 ms. Allocated memory was 206.0 MB in the beginning and 248.0 MB in the end (delta: 41.9 MB). Free memory was 152.9 MB in the beginning and 134.2 MB in the end (delta: 18.7 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 389]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((this_state <= 0 && q == 0) || (this_state <= 0 && q == 2)) || (q == 3 && 2 == this_state)) || (4 <= q && 3 == this_state) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (this_state <= 0 && q == 0) || (4 <= q && 3 == this_state) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1008 SDtfs, 1441 SDslu, 73 SDs, 0 SdLazy, 634 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 28 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 13 NumberOfFragments, 67 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 153 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 15354 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 55/55 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 correct! Received shutdown request...