/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:48:04,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:48:04,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:48:04,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:48:04,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:48:04,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:48:04,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:48:04,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:48:04,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:48:04,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:48:04,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:48:04,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:48:04,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:48:04,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:48:04,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:48:04,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:48:04,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:48:04,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:48:04,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:48:04,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:48:04,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:48:04,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:48:04,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:48:04,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:48:04,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 23:48:04,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:48:04,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:48:04,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:48:04,698 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 23:48:04,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:48:04,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:48:04,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:48:04,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:48:04,724 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:48:04,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:48:04,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:48:04,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:48:04,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:48:04,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:48:04,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:48:04,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:48:04,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:48:04,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:48:04,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:48:04,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:48:04,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:48:04,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:48:04,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:48:04,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:48:04,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:48:04,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:48:04,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:48:04,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:48:04,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:48:04,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:48:04,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:48:04,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:48:04,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:48:04,729 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:48:05,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:48:05,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:48:05,078 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:48:05,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:48:05,081 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:48:05,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 23:48:05,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156819e10/6c33fbe1ee0d4a5390f0ed105fb3c2d3/FLAG74e5979ea [2020-08-21 23:48:05,596 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:48:05,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 23:48:05,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156819e10/6c33fbe1ee0d4a5390f0ed105fb3c2d3/FLAG74e5979ea [2020-08-21 23:48:06,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156819e10/6c33fbe1ee0d4a5390f0ed105fb3c2d3 [2020-08-21 23:48:06,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:48:06,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:48:06,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:06,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:48:06,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:48:06,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06, skipping insertion in model container [2020-08-21 23:48:06,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:48:06,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:48:06,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:06,298 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:48:06,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:06,348 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:48:06,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06 WrapperNode [2020-08-21 23:48:06,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:06,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:48:06,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:48:06,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:48:06,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (1/1) ... [2020-08-21 23:48:06,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:48:06,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:48:06,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:48:06,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:48:06,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (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 23:48:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:48:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:48:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:48:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:48:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:48:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:48:06,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:48:06,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:48:06,829 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:48:06,832 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:48:06,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:06 BoogieIcfgContainer [2020-08-21 23:48:06,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:48:06,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:48:06,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:48:06,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:48:06,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:48:06" (1/3) ... [2020-08-21 23:48:06,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36099c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:06, skipping insertion in model container [2020-08-21 23:48:06,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:06" (2/3) ... [2020-08-21 23:48:06,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36099c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:06, skipping insertion in model container [2020-08-21 23:48:06,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:06" (3/3) ... [2020-08-21 23:48:06,852 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-21 23:48:06,863 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:48:06,871 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:48:06,885 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:48:06,910 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:48:06,910 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:48:06,910 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:48:06,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:48:06,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:48:06,911 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:48:06,911 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:48:06,911 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:48:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 23:48:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 23:48:06,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:06,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:06,938 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-21 23:48:06,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:06,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110148690] [2020-08-21 23:48:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,142 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 23:48:07,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110148690] [2020-08-21 23:48:07,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319660358] [2020-08-21 23:48:07,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,169 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-21 23:48:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,214 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-21 23:48:07,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 23:48:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,227 INFO L225 Difference]: With dead ends: 57 [2020-08-21 23:48:07,228 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 23:48:07,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 23:48:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-21 23:48:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 23:48:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-21 23:48:07,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-21 23:48:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,274 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-21 23:48:07,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-21 23:48:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 23:48:07,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:48:07,277 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-21 23:48:07,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165211710] [2020-08-21 23:48:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,327 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 23:48:07,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165211710] [2020-08-21 23:48:07,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396981258] [2020-08-21 23:48:07,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,331 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-21 23:48:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,369 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-21 23:48:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 23:48:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,372 INFO L225 Difference]: With dead ends: 67 [2020-08-21 23:48:07,372 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 23:48:07,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 23:48:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-21 23:48:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 23:48:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-21 23:48:07,388 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-21 23:48:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,388 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-21 23:48:07,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-21 23:48:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 23:48:07,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:48:07,391 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-21 23:48:07,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778436178] [2020-08-21 23:48:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,467 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 23:48:07,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778436178] [2020-08-21 23:48:07,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016052343] [2020-08-21 23:48:07,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,471 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-21 23:48:07,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,500 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-21 23:48:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 23:48:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,502 INFO L225 Difference]: With dead ends: 63 [2020-08-21 23:48:07,502 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 23:48:07,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 23:48:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-21 23:48:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 23:48:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-21 23:48:07,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-21 23:48:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,512 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-21 23:48:07,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-21 23:48:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 23:48:07,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:48:07,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-21 23:48:07,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658608497] [2020-08-21 23:48:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,551 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 23:48:07,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658608497] [2020-08-21 23:48:07,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746035957] [2020-08-21 23:48:07,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,554 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-21 23:48:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,576 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-21 23:48:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 23:48:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,578 INFO L225 Difference]: With dead ends: 76 [2020-08-21 23:48:07,578 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 23:48:07,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 23:48:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-21 23:48:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 23:48:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-21 23:48:07,589 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-21 23:48:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,589 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-21 23:48:07,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-21 23:48:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 23:48:07,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:48:07,592 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-21 23:48:07,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294286551] [2020-08-21 23:48:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,631 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 23:48:07,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294286551] [2020-08-21 23:48:07,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709673711] [2020-08-21 23:48:07,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,633 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-21 23:48:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,658 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-21 23:48:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 23:48:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,660 INFO L225 Difference]: With dead ends: 124 [2020-08-21 23:48:07,660 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 23:48:07,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 23:48:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-21 23:48:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 23:48:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-21 23:48:07,671 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-21 23:48:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,671 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-21 23:48:07,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-21 23:48:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 23:48:07,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:48:07,673 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-21 23:48:07,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726923832] [2020-08-21 23:48:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,702 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 23:48:07,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726923832] [2020-08-21 23:48:07,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624194560] [2020-08-21 23:48:07,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,705 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-21 23:48:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,721 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-21 23:48:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 23:48:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,723 INFO L225 Difference]: With dead ends: 111 [2020-08-21 23:48:07,723 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 23:48:07,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 23:48:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 23:48:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 23:48:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-21 23:48:07,734 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-21 23:48:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,735 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-21 23:48:07,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-21 23:48:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 23:48:07,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:48:07,737 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-21 23:48:07,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919330750] [2020-08-21 23:48:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,765 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 23:48:07,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919330750] [2020-08-21 23:48:07,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917581851] [2020-08-21 23:48:07,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,768 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-21 23:48:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,792 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-21 23:48:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 23:48:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,795 INFO L225 Difference]: With dead ends: 132 [2020-08-21 23:48:07,795 INFO L226 Difference]: Without dead ends: 130 [2020-08-21 23:48:07,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-21 23:48:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-21 23:48:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 23:48:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-21 23:48:07,824 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-21 23:48:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,827 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-21 23:48:07,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-21 23:48:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 23:48:07,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:48:07,829 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-21 23:48:07,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144961922] [2020-08-21 23:48:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,875 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 23:48:07,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144961922] [2020-08-21 23:48:07,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416258897] [2020-08-21 23:48:07,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,878 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-21 23:48:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:07,901 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-21 23:48:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:07,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 23:48:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:07,903 INFO L225 Difference]: With dead ends: 232 [2020-08-21 23:48:07,904 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 23:48:07,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 23:48:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 23:48:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 23:48:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-21 23:48:07,919 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-21 23:48:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:07,919 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-21 23:48:07,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-21 23:48:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 23:48:07,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:07,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:07,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:48:07,922 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-21 23:48:07,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:07,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420996336] [2020-08-21 23:48:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:07,976 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 23:48:07,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420996336] [2020-08-21 23:48:07,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:07,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:07,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262551039] [2020-08-21 23:48:07,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:07,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:07,979 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-21 23:48:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:08,000 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-21 23:48:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:08,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 23:48:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:08,002 INFO L225 Difference]: With dead ends: 204 [2020-08-21 23:48:08,003 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 23:48:08,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 23:48:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-21 23:48:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 23:48:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-21 23:48:08,037 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-21 23:48:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:08,038 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-21 23:48:08,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-21 23:48:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 23:48:08,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:08,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:08,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:48:08,040 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-21 23:48:08,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:08,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731430242] [2020-08-21 23:48:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,070 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 23:48:08,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731430242] [2020-08-21 23:48:08,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:08,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:08,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068867522] [2020-08-21 23:48:08,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:08,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:08,072 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-21 23:48:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:08,095 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-21 23:48:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:08,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 23:48:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:08,098 INFO L225 Difference]: With dead ends: 236 [2020-08-21 23:48:08,098 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 23:48:08,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 23:48:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-21 23:48:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 23:48:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-21 23:48:08,112 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-21 23:48:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:08,112 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-21 23:48:08,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-21 23:48:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 23:48:08,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:08,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:08,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:48:08,114 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-21 23:48:08,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:08,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371508356] [2020-08-21 23:48:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,140 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 23:48:08,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371508356] [2020-08-21 23:48:08,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:08,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:08,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014308934] [2020-08-21 23:48:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:08,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:08,142 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-21 23:48:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:08,168 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-21 23:48:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:08,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 23:48:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:08,171 INFO L225 Difference]: With dead ends: 444 [2020-08-21 23:48:08,171 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 23:48:08,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 23:48:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 23:48:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 23:48:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-21 23:48:08,189 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-21 23:48:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:08,190 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-21 23:48:08,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-21 23:48:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:48:08,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:08,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:08,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:48:08,192 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:08,192 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-21 23:48:08,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:08,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454603940] [2020-08-21 23:48:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,213 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 23:48:08,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454603940] [2020-08-21 23:48:08,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:08,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:08,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989372991] [2020-08-21 23:48:08,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:08,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:08,215 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-21 23:48:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:08,241 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-21 23:48:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:08,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 23:48:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:08,244 INFO L225 Difference]: With dead ends: 384 [2020-08-21 23:48:08,244 INFO L226 Difference]: Without dead ends: 266 [2020-08-21 23:48:08,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-21 23:48:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-21 23:48:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 23:48:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-21 23:48:08,259 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-21 23:48:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:08,260 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-21 23:48:08,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-21 23:48:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:48:08,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:08,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:08,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:48:08,262 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-21 23:48:08,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:08,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522260512] [2020-08-21 23:48:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,285 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 23:48:08,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522260512] [2020-08-21 23:48:08,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:08,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:08,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757232912] [2020-08-21 23:48:08,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:08,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:08,287 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-21 23:48:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:08,309 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-21 23:48:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:08,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 23:48:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:08,312 INFO L225 Difference]: With dead ends: 426 [2020-08-21 23:48:08,312 INFO L226 Difference]: Without dead ends: 424 [2020-08-21 23:48:08,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-21 23:48:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-21 23:48:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 23:48:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-21 23:48:08,328 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-21 23:48:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:08,328 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-21 23:48:08,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-21 23:48:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:48:08,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:08,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:08,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:48:08,331 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-21 23:48:08,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:08,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092869607] [2020-08-21 23:48:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:08,350 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 23:48:08,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092869607] [2020-08-21 23:48:08,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:08,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:08,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911655073] [2020-08-21 23:48:08,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:08,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:08,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:08,353 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-21 23:48:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:08,379 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-21 23:48:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:08,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 23:48:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:08,380 INFO L225 Difference]: With dead ends: 856 [2020-08-21 23:48:08,380 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 23:48:08,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:48:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 23:48:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 23:48:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 23:48:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 23:48:08,383 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-21 23:48:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:08,383 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 23:48:08,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 23:48:08,384 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 23:48:08,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:48:08,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 23:48:08,410 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 23:48:08,411 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:48:08,411 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:48:08,411 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 23:48:08,411 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 23:48:08,411 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 23:48:08,411 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-21 23:48:08,411 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,412 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,413 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,413 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-21 23:48:08,413 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 23:48:08,413 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,413 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-21 23:48:08,413 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-21 23:48:08,413 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-21 23:48:08,414 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-21 23:48:08,414 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,414 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-21 23:48:08,414 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-21 23:48:08,414 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-21 23:48:08,414 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-21 23:48:08,414 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 23:48:08,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:48:08 BoogieIcfgContainer [2020-08-21 23:48:08,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:48:08,429 INFO L168 Benchmark]: Toolchain (without parser) took 2412.77 ms. Allocated memory was 136.8 MB in the beginning and 228.1 MB in the end (delta: 91.2 MB). Free memory was 99.6 MB in the beginning and 142.0 MB in the end (delta: -42.4 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:08,430 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 23:48:08,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.60 ms. Allocated memory is still 136.8 MB. Free memory was 99.4 MB in the beginning and 89.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:08,432 INFO L168 Benchmark]: Boogie Preprocessor took 115.93 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 89.4 MB in the beginning and 177.0 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:08,432 INFO L168 Benchmark]: RCFGBuilder took 376.26 ms. Allocated memory is still 199.2 MB. Free memory was 177.0 MB in the beginning and 162.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:08,433 INFO L168 Benchmark]: TraceAbstraction took 1582.12 ms. Allocated memory was 199.2 MB in the beginning and 228.1 MB in the end (delta: 28.8 MB). Free memory was 161.5 MB in the beginning and 142.0 MB in the end (delta: 19.5 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:08,436 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.60 ms. Allocated memory is still 136.8 MB. Free memory was 99.4 MB in the beginning and 89.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.93 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 89.4 MB in the beginning and 177.0 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.26 ms. Allocated memory is still 199.2 MB. Free memory was 177.0 MB in the beginning and 162.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1582.12 ms. Allocated memory was 199.2 MB in the beginning and 228.1 MB in the end (delta: 28.8 MB). Free memory was 161.5 MB in the beginning and 142.0 MB in the end (delta: 19.5 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...