/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:25:30,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:25:30,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:25:31,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:25:31,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:25:31,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:25:31,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:25:31,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:25:31,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:25:31,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:25:31,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:25:31,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:25:31,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:25:31,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:25:31,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:25:31,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:25:31,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:25:31,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:25:31,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:25:31,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:25:31,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:25:31,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:25:31,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:25:31,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:25:31,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:25:31,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:25:31,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:25:31,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:25:31,098 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 17:25:31,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:25:31,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:25:31,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:25:31,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:25:31,146 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:25:31,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:25:31,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:25:31,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:25:31,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:25:31,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:25:31,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:25:31,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:25:31,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:25:31,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:25:31,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:25:31,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:25:31,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:25:31,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:25:31,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:25:31,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:25:31,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:25:31,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:25:31,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:25:31,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:25:31,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:25:31,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:25:31,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:25:31,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:25:31,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:25:31,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:25:31,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:25:31,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:25:31,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:25:31,470 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:25:31,471 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:25:31,472 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2020-08-21 17:25:31,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1a0351f4/0289a9b1a35a48ffa522ca6dab817f71/FLAGd1f69d571 [2020-08-21 17:25:31,995 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:25:31,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_security.c [2020-08-21 17:25:32,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1a0351f4/0289a9b1a35a48ffa522ca6dab817f71/FLAGd1f69d571 [2020-08-21 17:25:32,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1a0351f4/0289a9b1a35a48ffa522ca6dab817f71 [2020-08-21 17:25:32,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:25:32,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:25:32,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:25:32,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:25:32,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:25:32,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631308b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32, skipping insertion in model container [2020-08-21 17:25:32,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:25:32,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:25:32,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:25:32,658 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:25:32,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:25:32,818 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:25:32,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32 WrapperNode [2020-08-21 17:25:32,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:25:32,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:25:32,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:25:32,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:25:32,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (1/1) ... [2020-08-21 17:25:32,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:25:32,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:25:32,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:25:32,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:25:32,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (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 17:25:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:25:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:25:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:25:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:25:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:25:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:25:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:25:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:25:33,438 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:25:33,438 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-08-21 17:25:33,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:25:33 BoogieIcfgContainer [2020-08-21 17:25:33,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:25:33,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:25:33,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:25:33,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:25:33,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:25:32" (1/3) ... [2020-08-21 17:25:33,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5019eb16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:25:33, skipping insertion in model container [2020-08-21 17:25:33,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:32" (2/3) ... [2020-08-21 17:25:33,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5019eb16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:25:33, skipping insertion in model container [2020-08-21 17:25:33,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:25:33" (3/3) ... [2020-08-21 17:25:33,453 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2020-08-21 17:25:33,465 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:25:33,474 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:25:33,489 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:25:33,512 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:25:33,512 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:25:33,512 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:25:33,513 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:25:33,513 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:25:33,513 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:25:33,513 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:25:33,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:25:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-08-21 17:25:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 17:25:33,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:33,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:33,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:33,547 INFO L82 PathProgramCache]: Analyzing trace with hash -105811556, now seen corresponding path program 1 times [2020-08-21 17:25:33,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:33,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090150111] [2020-08-21 17:25:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:33,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:33,754 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 17:25:33,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090150111] [2020-08-21 17:25:33,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:33,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:25:33,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974936719] [2020-08-21 17:25:33,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:25:33,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:25:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:25:33,785 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 3 states. [2020-08-21 17:25:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:33,845 INFO L93 Difference]: Finished difference Result 160 states and 298 transitions. [2020-08-21 17:25:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:25:33,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-21 17:25:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:33,861 INFO L225 Difference]: With dead ends: 160 [2020-08-21 17:25:33,861 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 17:25:33,865 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 [2020-08-21 17:25:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 17:25:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 17:25:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 17:25:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 113 transitions. [2020-08-21 17:25:33,915 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 113 transitions. Word has length 13 [2020-08-21 17:25:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:33,916 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 113 transitions. [2020-08-21 17:25:33,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:25:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 113 transitions. [2020-08-21 17:25:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 17:25:33,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:33,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:33,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:25:33,919 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1547300989, now seen corresponding path program 1 times [2020-08-21 17:25:33,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:33,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574360608] [2020-08-21 17:25:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,009 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 17:25:34,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574360608] [2020-08-21 17:25:34,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:34,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:34,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174693985] [2020-08-21 17:25:34,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:34,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:34,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:34,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:34,014 INFO L87 Difference]: Start difference. First operand 78 states and 113 transitions. Second operand 4 states. [2020-08-21 17:25:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:34,327 INFO L93 Difference]: Finished difference Result 153 states and 224 transitions. [2020-08-21 17:25:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:34,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 17:25:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:34,332 INFO L225 Difference]: With dead ends: 153 [2020-08-21 17:25:34,332 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 17:25:34,334 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 [2020-08-21 17:25:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 17:25:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 17:25:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 17:25:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2020-08-21 17:25:34,347 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 14 [2020-08-21 17:25:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:34,347 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2020-08-21 17:25:34,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2020-08-21 17:25:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:25:34,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:34,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:34,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:25:34,349 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash 555004895, now seen corresponding path program 1 times [2020-08-21 17:25:34,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:34,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334444516] [2020-08-21 17:25:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:25:34,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334444516] [2020-08-21 17:25:34,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:34,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:34,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866391103] [2020-08-21 17:25:34,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:34,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:34,417 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand 4 states. [2020-08-21 17:25:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:34,504 INFO L93 Difference]: Finished difference Result 146 states and 213 transitions. [2020-08-21 17:25:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:34,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-21 17:25:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:34,506 INFO L225 Difference]: With dead ends: 146 [2020-08-21 17:25:34,506 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 17:25:34,507 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 [2020-08-21 17:25:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 17:25:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 17:25:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 17:25:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 102 transitions. [2020-08-21 17:25:34,517 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 102 transitions. Word has length 19 [2020-08-21 17:25:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:34,518 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 102 transitions. [2020-08-21 17:25:34,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 102 transitions. [2020-08-21 17:25:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:25:34,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:34,520 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] [2020-08-21 17:25:34,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:25:34,520 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash -624681896, now seen corresponding path program 1 times [2020-08-21 17:25:34,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:34,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377106585] [2020-08-21 17:25:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:25:34,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377106585] [2020-08-21 17:25:34,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:34,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:34,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492665198] [2020-08-21 17:25:34,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:34,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:34,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:34,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:34,600 INFO L87 Difference]: Start difference. First operand 72 states and 102 transitions. Second operand 4 states. [2020-08-21 17:25:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:34,853 INFO L93 Difference]: Finished difference Result 192 states and 280 transitions. [2020-08-21 17:25:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:34,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-21 17:25:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:34,855 INFO L225 Difference]: With dead ends: 192 [2020-08-21 17:25:34,855 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 17:25:34,856 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 [2020-08-21 17:25:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 17:25:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-08-21 17:25:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 17:25:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-21 17:25:34,870 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 22 [2020-08-21 17:25:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:34,870 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-21 17:25:34,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-21 17:25:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:25:34,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:34,872 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] [2020-08-21 17:25:34,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:25:34,872 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598883, now seen corresponding path program 1 times [2020-08-21 17:25:34,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:34,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717632785] [2020-08-21 17:25:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:25:34,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717632785] [2020-08-21 17:25:34,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:34,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:34,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215125908] [2020-08-21 17:25:34,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:34,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:34,927 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 4 states. [2020-08-21 17:25:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:35,098 INFO L93 Difference]: Finished difference Result 183 states and 260 transitions. [2020-08-21 17:25:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:35,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-08-21 17:25:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:35,099 INFO L225 Difference]: With dead ends: 183 [2020-08-21 17:25:35,100 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 17:25:35,101 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 [2020-08-21 17:25:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 17:25:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-08-21 17:25:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 17:25:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2020-08-21 17:25:35,111 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 23 [2020-08-21 17:25:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:35,112 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2020-08-21 17:25:35,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2020-08-21 17:25:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 17:25:35,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:35,114 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] [2020-08-21 17:25:35,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:25:35,114 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash -576284788, now seen corresponding path program 1 times [2020-08-21 17:25:35,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:35,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547908023] [2020-08-21 17:25:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:25:35,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547908023] [2020-08-21 17:25:35,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:35,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:35,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630221143] [2020-08-21 17:25:35,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:35,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:35,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:35,172 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 4 states. [2020-08-21 17:25:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:35,269 INFO L93 Difference]: Finished difference Result 134 states and 190 transitions. [2020-08-21 17:25:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:35,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-21 17:25:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:35,271 INFO L225 Difference]: With dead ends: 134 [2020-08-21 17:25:35,271 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 17:25:35,272 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 [2020-08-21 17:25:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 17:25:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 17:25:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:25:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2020-08-21 17:25:35,280 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 29 [2020-08-21 17:25:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:35,281 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2020-08-21 17:25:35,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2020-08-21 17:25:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 17:25:35,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:35,283 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] [2020-08-21 17:25:35,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:25:35,283 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:35,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:35,284 INFO L82 PathProgramCache]: Analyzing trace with hash -31288535, now seen corresponding path program 1 times [2020-08-21 17:25:35,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:35,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126527780] [2020-08-21 17:25:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:25:35,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126527780] [2020-08-21 17:25:35,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:35,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:35,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977086962] [2020-08-21 17:25:35,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:35,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:35,356 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand 4 states. [2020-08-21 17:25:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:35,560 INFO L93 Difference]: Finished difference Result 158 states and 228 transitions. [2020-08-21 17:25:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:35,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-21 17:25:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:35,562 INFO L225 Difference]: With dead ends: 158 [2020-08-21 17:25:35,563 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 17:25:35,563 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 [2020-08-21 17:25:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 17:25:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-21 17:25:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 17:25:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 138 transitions. [2020-08-21 17:25:35,573 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 138 transitions. Word has length 30 [2020-08-21 17:25:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:35,574 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 138 transitions. [2020-08-21 17:25:35,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 138 transitions. [2020-08-21 17:25:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 17:25:35,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:35,576 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] [2020-08-21 17:25:35,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:25:35,576 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash 180888733, now seen corresponding path program 1 times [2020-08-21 17:25:35,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:35,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390131470] [2020-08-21 17:25:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:25:35,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390131470] [2020-08-21 17:25:35,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:35,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:35,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103294529] [2020-08-21 17:25:35,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:35,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:35,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:35,653 INFO L87 Difference]: Start difference. First operand 99 states and 138 transitions. Second operand 4 states. [2020-08-21 17:25:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:35,759 INFO L93 Difference]: Finished difference Result 166 states and 232 transitions. [2020-08-21 17:25:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:35,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-21 17:25:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:35,761 INFO L225 Difference]: With dead ends: 166 [2020-08-21 17:25:35,761 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 17:25:35,762 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 [2020-08-21 17:25:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 17:25:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-08-21 17:25:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-21 17:25:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2020-08-21 17:25:35,782 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 31 [2020-08-21 17:25:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:35,783 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2020-08-21 17:25:35,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2020-08-21 17:25:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 17:25:35,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:35,784 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] [2020-08-21 17:25:35,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:25:35,788 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash 317242888, now seen corresponding path program 1 times [2020-08-21 17:25:35,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:35,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531952793] [2020-08-21 17:25:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:25:35,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531952793] [2020-08-21 17:25:35,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:35,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:35,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013419696] [2020-08-21 17:25:35,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:35,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:35,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:35,843 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 4 states. [2020-08-21 17:25:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:35,963 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2020-08-21 17:25:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:35,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-21 17:25:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:35,965 INFO L225 Difference]: With dead ends: 139 [2020-08-21 17:25:35,965 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 17:25:35,966 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 [2020-08-21 17:25:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 17:25:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 17:25:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 17:25:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2020-08-21 17:25:35,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 31 [2020-08-21 17:25:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:35,972 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2020-08-21 17:25:35,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2020-08-21 17:25:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 17:25:35,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:35,973 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] [2020-08-21 17:25:35,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:25:35,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1695196396, now seen corresponding path program 1 times [2020-08-21 17:25:35,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:35,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869735786] [2020-08-21 17:25:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:36,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:25:36,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869735786] [2020-08-21 17:25:36,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:36,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:36,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308906526] [2020-08-21 17:25:36,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:36,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:36,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:36,017 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand 4 states. [2020-08-21 17:25:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:36,117 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-08-21 17:25:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:36,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-21 17:25:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:36,118 INFO L225 Difference]: With dead ends: 74 [2020-08-21 17:25:36,119 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 17:25:36,119 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 [2020-08-21 17:25:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 17:25:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 17:25:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:25:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2020-08-21 17:25:36,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 32 [2020-08-21 17:25:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:36,125 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2020-08-21 17:25:36,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2020-08-21 17:25:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 17:25:36,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:36,126 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] [2020-08-21 17:25:36,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:25:36,127 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1000030502, now seen corresponding path program 1 times [2020-08-21 17:25:36,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:36,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441131252] [2020-08-21 17:25:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:25:36,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441131252] [2020-08-21 17:25:36,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:36,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:36,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218000592] [2020-08-21 17:25:36,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:25:36,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:25:36,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:25:36,170 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 4 states. [2020-08-21 17:25:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:36,291 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2020-08-21 17:25:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:25:36,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-21 17:25:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:36,294 INFO L225 Difference]: With dead ends: 111 [2020-08-21 17:25:36,294 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:25:36,295 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 [2020-08-21 17:25:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:25:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:25:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:25:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:25:36,296 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-08-21 17:25:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:36,296 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:25:36,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:25:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:25:36,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:25:36,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:25:36,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:25:36,509 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:25:36,510 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)|)) [2020-08-21 17:25:36,510 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:25:36,510 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:25:36,511 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:25:36,511 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:25:36,511 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:25:36,511 INFO L268 CegarLoopResult]: For program point L316(lines 316 331) no Hoare annotation was computed. [2020-08-21 17:25:36,511 INFO L268 CegarLoopResult]: For program point L283(lines 283 382) no Hoare annotation was computed. [2020-08-21 17:25:36,511 INFO L268 CegarLoopResult]: For program point L250(lines 250 261) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 390) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L184(lines 184 199) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L118(lines 118 129) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L366(lines 366 377) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L300(lines 300 315) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L234(lines 234 245) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L102(lines 102 113) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L350(lines 350 361) no Hoare annotation was computed. [2020-08-21 17:25:36,512 INFO L268 CegarLoopResult]: For program point L284(lines 284 299) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L218(lines 218 229) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L86(lines 86 88) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L334(lines 334 345) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L202(lines 202 213) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L70(lines 70 72) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L318(lines 318 329) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L186(lines 186 197) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L54(lines 54 56) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L302(lines 302 313) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 390) no Hoare annotation was computed. [2020-08-21 17:25:36,513 INFO L268 CegarLoopResult]: For program point L170(lines 170 172) no Hoare annotation was computed. [2020-08-21 17:25:36,514 INFO L268 CegarLoopResult]: For program point L286(lines 286 297) no Hoare annotation was computed. [2020-08-21 17:25:36,514 INFO L268 CegarLoopResult]: For program point L154(lines 154 156) no Hoare annotation was computed. [2020-08-21 17:25:36,514 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))) [2020-08-21 17:25:36,514 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 385) no Hoare annotation was computed. [2020-08-21 17:25:36,514 INFO L268 CegarLoopResult]: For program point L270(lines 270 272) no Hoare annotation was computed. [2020-08-21 17:25:36,514 INFO L268 CegarLoopResult]: For program point L138(lines 138 140) no Hoare annotation was computed. [2020-08-21 17:25:36,515 INFO L268 CegarLoopResult]: For program point L254(lines 254 256) no Hoare annotation was computed. [2020-08-21 17:25:36,515 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-08-21 17:25:36,515 INFO L268 CegarLoopResult]: For program point L370(lines 370 372) no Hoare annotation was computed. [2020-08-21 17:25:36,515 INFO L268 CegarLoopResult]: For program point L238(lines 238 240) no Hoare annotation was computed. [2020-08-21 17:25:36,515 INFO L268 CegarLoopResult]: For program point L106(lines 106 108) no Hoare annotation was computed. [2020-08-21 17:25:36,515 INFO L268 CegarLoopResult]: For program point L354(lines 354 356) no Hoare annotation was computed. [2020-08-21 17:25:36,516 INFO L268 CegarLoopResult]: For program point L222(lines 222 224) no Hoare annotation was computed. [2020-08-21 17:25:36,516 INFO L264 CegarLoopResult]: At program point L371(lines 13 390) the Hoare annotation is: false [2020-08-21 17:25:36,516 INFO L268 CegarLoopResult]: For program point L338(lines 338 340) no Hoare annotation was computed. [2020-08-21 17:25:36,516 INFO L268 CegarLoopResult]: For program point L206(lines 206 208) no Hoare annotation was computed. [2020-08-21 17:25:36,516 INFO L268 CegarLoopResult]: For program point L322(lines 322 324) no Hoare annotation was computed. [2020-08-21 17:25:36,516 INFO L268 CegarLoopResult]: For program point L190(lines 190 192) no Hoare annotation was computed. [2020-08-21 17:25:36,516 INFO L268 CegarLoopResult]: For program point L306(lines 306 308) no Hoare annotation was computed. [2020-08-21 17:25:36,517 INFO L268 CegarLoopResult]: For program point L290(lines 290 292) no Hoare annotation was computed. [2020-08-21 17:25:36,517 INFO L268 CegarLoopResult]: For program point L27(lines 27 46) no Hoare annotation was computed. [2020-08-21 17:25:36,517 INFO L268 CegarLoopResult]: For program point L28(lines 28 43) no Hoare annotation was computed. [2020-08-21 17:25:36,517 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 389) no Hoare annotation was computed. [2020-08-21 17:25:36,517 INFO L268 CegarLoopResult]: For program point L30(lines 30 41) no Hoare annotation was computed. [2020-08-21 17:25:36,517 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 390) the Hoare annotation is: true [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L80(lines 80 95) no Hoare annotation was computed. [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L47(lines 47 98) no Hoare annotation was computed. [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L64(lines 64 79) no Hoare annotation was computed. [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L48(lines 48 63) no Hoare annotation was computed. [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L164(lines 164 179) no Hoare annotation was computed. [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L148(lines 148 163) no Hoare annotation was computed. [2020-08-21 17:25:36,518 INFO L268 CegarLoopResult]: For program point L82(lines 82 93) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L264(lines 264 279) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L132(lines 132 147) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L99(lines 99 182) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L66(lines 66 77) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L248(lines 248 263) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L116(lines 116 131) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L50(lines 50 61) no Hoare annotation was computed. [2020-08-21 17:25:36,519 INFO L268 CegarLoopResult]: For program point L364(lines 364 379) no Hoare annotation was computed. [2020-08-21 17:25:36,520 INFO L268 CegarLoopResult]: For program point L232(lines 232 247) no Hoare annotation was computed. [2020-08-21 17:25:36,520 INFO L268 CegarLoopResult]: For program point L166(lines 166 177) no Hoare annotation was computed. [2020-08-21 17:25:36,520 INFO L268 CegarLoopResult]: For program point L100(lines 100 115) no Hoare annotation was computed. [2020-08-21 17:25:36,520 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-08-21 17:25:36,520 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)))) [2020-08-21 17:25:36,520 INFO L268 CegarLoopResult]: For program point L348(lines 348 363) no Hoare annotation was computed. [2020-08-21 17:25:36,520 INFO L268 CegarLoopResult]: For program point L216(lines 216 231) no Hoare annotation was computed. [2020-08-21 17:25:36,521 INFO L268 CegarLoopResult]: For program point L183(lines 183 282) no Hoare annotation was computed. [2020-08-21 17:25:36,521 INFO L268 CegarLoopResult]: For program point L150(lines 150 161) no Hoare annotation was computed. [2020-08-21 17:25:36,521 INFO L268 CegarLoopResult]: For program point L332(lines 332 347) no Hoare annotation was computed. [2020-08-21 17:25:36,521 INFO L268 CegarLoopResult]: For program point L266(lines 266 277) no Hoare annotation was computed. [2020-08-21 17:25:36,521 INFO L268 CegarLoopResult]: For program point L200(lines 200 215) no Hoare annotation was computed. [2020-08-21 17:25:36,521 INFO L268 CegarLoopResult]: For program point L134(lines 134 145) no Hoare annotation was computed. [2020-08-21 17:25:36,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:25:36 BoogieIcfgContainer [2020-08-21 17:25:36,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:25:36,544 INFO L168 Benchmark]: Toolchain (without parser) took 4151.83 ms. Allocated memory was 138.9 MB in the beginning and 248.0 MB in the end (delta: 109.1 MB). Free memory was 101.5 MB in the beginning and 172.6 MB in the end (delta: -71.1 MB). Peak memory consumption was 38.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:25:36,545 INFO L168 Benchmark]: CDTParser took 1.05 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:25:36,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.25 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.3 MB in the beginning and 179.1 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:25:36,547 INFO L168 Benchmark]: Boogie Preprocessor took 46.31 ms. Allocated memory is still 201.3 MB. Free memory was 179.1 MB in the beginning and 177.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:25:36,548 INFO L168 Benchmark]: RCFGBuilder took 578.10 ms. Allocated memory is still 201.3 MB. Free memory was 177.0 MB in the beginning and 148.7 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:25:36,549 INFO L168 Benchmark]: TraceAbstraction took 3095.71 ms. Allocated memory was 201.3 MB in the beginning and 248.0 MB in the end (delta: 46.7 MB). Free memory was 148.0 MB in the beginning and 172.6 MB in the end (delta: -24.6 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:25:36,553 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 426.25 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.3 MB in the beginning and 179.1 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.31 ms. Allocated memory is still 201.3 MB. Free memory was 179.1 MB in the beginning and 177.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 578.10 ms. Allocated memory is still 201.3 MB. Free memory was 177.0 MB in the beginning and 148.7 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3095.71 ms. Allocated memory was 201.3 MB in the beginning and 248.0 MB in the end (delta: 46.7 MB). Free memory was 148.0 MB in the beginning and 172.6 MB in the end (delta: -24.6 MB). Peak memory consumption was 22.1 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: 2.7s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, 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, 0.1s 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...