/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:51:28,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:51:28,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:51:28,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:51:28,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:51:28,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:51:28,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:51:28,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:51:28,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:51:28,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:51:28,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:51:28,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:51:28,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:51:28,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:51:28,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:51:28,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:51:28,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:51:28,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:51:28,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:51:28,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:51:28,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:51:28,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:51:28,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:51:28,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:51:28,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 03:51:28,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:51:28,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:51:28,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:51:28,966 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 [2020-08-22 03:51:29,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:51:29,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:51:29,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:51:29,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:51:29,010 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:51:29,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:51:29,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:51:29,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:51:29,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:51:29,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:51:29,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:51:29,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:51:29,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:51:29,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:51:29,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:51:29,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:51:29,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:51:29,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:51:29,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:51:29,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:51:29,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:51:29,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:51:29,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:51:29,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:51:29,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:51:29,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:51:29,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:51:29,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:51:29,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:51:29,016 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:51:29,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:51:29,330 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:51:29,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:51:29,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:51:29,335 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:51:29,336 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 03:51:29,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/deadd7796/2f217e8f8694473cbb480cb27d15ed83/FLAG3af1a26f0 [2020-08-22 03:51:29,885 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:51:29,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 03:51:29,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/deadd7796/2f217e8f8694473cbb480cb27d15ed83/FLAG3af1a26f0 [2020-08-22 03:51:30,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/deadd7796/2f217e8f8694473cbb480cb27d15ed83 [2020-08-22 03:51:30,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:51:30,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:51:30,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:30,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:51:30,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:51:30,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0614b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30, skipping insertion in model container [2020-08-22 03:51:30,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:51:30,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:51:30,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:30,513 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:51:30,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:30,557 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:51:30,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30 WrapperNode [2020-08-22 03:51:30,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:30,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:51:30,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:51:30,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:51:30,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:51:30,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:51:30,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:51:30,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:51:30,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (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 [2020-08-22 03:51:30,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:51:30,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:51:30,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:51:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:51:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:51:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:51:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:51:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:51:31,035 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:51:31,036 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:51:31,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:31 BoogieIcfgContainer [2020-08-22 03:51:31,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:51:31,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:51:31,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:51:31,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:51:31,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:51:30" (1/3) ... [2020-08-22 03:51:31,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737d72de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:31, skipping insertion in model container [2020-08-22 03:51:31,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (2/3) ... [2020-08-22 03:51:31,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737d72de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:31, skipping insertion in model container [2020-08-22 03:51:31,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:31" (3/3) ... [2020-08-22 03:51:31,052 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-22 03:51:31,068 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:51:31,075 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:51:31,096 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:51:31,126 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:51:31,126 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:51:31,126 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:51:31,127 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:51:31,127 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:51:31,127 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:51:31,127 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:51:31,127 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:51:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-22 03:51:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:31,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,160 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-22 03:51:31,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977487805] [2020-08-22 03:51:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977487805] [2020-08-22 03:51:31,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992511255] [2020-08-22 03:51:31,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,406 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-22 03:51:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,468 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-22 03:51:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,489 INFO L225 Difference]: With dead ends: 81 [2020-08-22 03:51:31,489 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 03:51:31,494 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 [2020-08-22 03:51:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 03:51:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-22 03:51:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 03:51:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-22 03:51:31,539 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-22 03:51:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,540 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-22 03:51:31,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-22 03:51:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:31,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:51:31,543 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-22 03:51:31,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691097305] [2020-08-22 03:51:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691097305] [2020-08-22 03:51:31,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433504864] [2020-08-22 03:51:31,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,657 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-22 03:51:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,711 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-22 03:51:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,714 INFO L225 Difference]: With dead ends: 107 [2020-08-22 03:51:31,716 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 03:51:31,718 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 [2020-08-22 03:51:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 03:51:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-22 03:51:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 03:51:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-22 03:51:31,729 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-22 03:51:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,730 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-22 03:51:31,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-22 03:51:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:31,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:51:31,732 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-22 03:51:31,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675493681] [2020-08-22 03:51:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675493681] [2020-08-22 03:51:31,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224711653] [2020-08-22 03:51:31,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,786 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-22 03:51:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,809 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-22 03:51:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,811 INFO L225 Difference]: With dead ends: 99 [2020-08-22 03:51:31,811 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 03:51:31,812 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 [2020-08-22 03:51:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 03:51:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-22 03:51:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 03:51:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-22 03:51:31,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-22 03:51:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,823 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-22 03:51:31,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-22 03:51:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:31,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:51:31,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-22 03:51:31,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301723972] [2020-08-22 03:51:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301723972] [2020-08-22 03:51:31,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462255270] [2020-08-22 03:51:31,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,879 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-22 03:51:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,921 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-22 03:51:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,924 INFO L225 Difference]: With dead ends: 124 [2020-08-22 03:51:31,924 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 03:51:31,924 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 [2020-08-22 03:51:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 03:51:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-22 03:51:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 03:51:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-22 03:51:31,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-22 03:51:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,937 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-22 03:51:31,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-22 03:51:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:31,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:51:31,939 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-22 03:51:31,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656583975] [2020-08-22 03:51:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656583975] [2020-08-22 03:51:31,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172611743] [2020-08-22 03:51:31,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,995 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-22 03:51:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,016 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-22 03:51:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,019 INFO L225 Difference]: With dead ends: 204 [2020-08-22 03:51:32,019 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 03:51:32,020 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 [2020-08-22 03:51:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 03:51:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-22 03:51:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 03:51:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-22 03:51:32,034 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-22 03:51:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,035 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-22 03:51:32,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-22 03:51:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:32,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:51:32,037 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-22 03:51:32,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967252955] [2020-08-22 03:51:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967252955] [2020-08-22 03:51:32,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037237697] [2020-08-22 03:51:32,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,075 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-22 03:51:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,094 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-22 03:51:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,096 INFO L225 Difference]: With dead ends: 183 [2020-08-22 03:51:32,096 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 03:51:32,097 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 [2020-08-22 03:51:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 03:51:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-22 03:51:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 03:51:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-22 03:51:32,111 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-22 03:51:32,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,114 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-22 03:51:32,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-22 03:51:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:32,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:51:32,116 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-22 03:51:32,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469935322] [2020-08-22 03:51:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469935322] [2020-08-22 03:51:32,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927650782] [2020-08-22 03:51:32,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,200 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-22 03:51:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,239 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-22 03:51:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,242 INFO L225 Difference]: With dead ends: 228 [2020-08-22 03:51:32,242 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 03:51:32,243 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 [2020-08-22 03:51:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 03:51:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-22 03:51:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 03:51:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-22 03:51:32,256 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-22 03:51:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,257 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-22 03:51:32,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-22 03:51:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:32,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:51:32,259 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-22 03:51:32,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030139980] [2020-08-22 03:51:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030139980] [2020-08-22 03:51:32,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935630092] [2020-08-22 03:51:32,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,290 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-22 03:51:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,310 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-22 03:51:32,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,313 INFO L225 Difference]: With dead ends: 392 [2020-08-22 03:51:32,313 INFO L226 Difference]: Without dead ends: 234 [2020-08-22 03:51:32,315 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 [2020-08-22 03:51:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-22 03:51:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-22 03:51:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 03:51:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-22 03:51:32,339 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-22 03:51:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,339 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-22 03:51:32,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-22 03:51:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:32,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:51:32,344 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-22 03:51:32,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207931110] [2020-08-22 03:51:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207931110] [2020-08-22 03:51:32,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146567228] [2020-08-22 03:51:32,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,404 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-22 03:51:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,435 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-22 03:51:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,438 INFO L225 Difference]: With dead ends: 348 [2020-08-22 03:51:32,441 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 03:51:32,443 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 [2020-08-22 03:51:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 03:51:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-22 03:51:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 03:51:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-22 03:51:32,469 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-22 03:51:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,469 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-22 03:51:32,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-22 03:51:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:51:32,472 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-22 03:51:32,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701899068] [2020-08-22 03:51:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701899068] [2020-08-22 03:51:32,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560066323] [2020-08-22 03:51:32,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,530 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-22 03:51:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,551 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-22 03:51:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,554 INFO L225 Difference]: With dead ends: 428 [2020-08-22 03:51:32,554 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 03:51:32,555 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 [2020-08-22 03:51:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 03:51:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-22 03:51:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-22 03:51:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-22 03:51:32,569 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-22 03:51:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,570 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-22 03:51:32,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-22 03:51:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:32,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:51:32,572 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-22 03:51:32,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498947012] [2020-08-22 03:51:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498947012] [2020-08-22 03:51:32,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519934546] [2020-08-22 03:51:32,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,601 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-22 03:51:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,632 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-22 03:51:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,636 INFO L225 Difference]: With dead ends: 764 [2020-08-22 03:51:32,636 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 03:51:32,638 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 [2020-08-22 03:51:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 03:51:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-22 03:51:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-22 03:51:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-22 03:51:32,656 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-22 03:51:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,657 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-22 03:51:32,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-22 03:51:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:32,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:51:32,659 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-22 03:51:32,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17442327] [2020-08-22 03:51:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17442327] [2020-08-22 03:51:32,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368586276] [2020-08-22 03:51:32,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,683 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-22 03:51:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,705 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-22 03:51:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,709 INFO L225 Difference]: With dead ends: 672 [2020-08-22 03:51:32,709 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 03:51:32,711 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 [2020-08-22 03:51:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 03:51:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-22 03:51:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 03:51:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-22 03:51:32,727 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-22 03:51:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,728 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-22 03:51:32,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-22 03:51:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:32,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:51:32,733 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-22 03:51:32,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019048524] [2020-08-22 03:51:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019048524] [2020-08-22 03:51:32,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604247799] [2020-08-22 03:51:32,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,780 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-22 03:51:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,812 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-22 03:51:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,818 INFO L225 Difference]: With dead ends: 812 [2020-08-22 03:51:32,818 INFO L226 Difference]: Without dead ends: 810 [2020-08-22 03:51:32,819 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 [2020-08-22 03:51:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-22 03:51:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-22 03:51:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-22 03:51:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-22 03:51:32,839 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-22 03:51:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,840 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-22 03:51:32,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-22 03:51:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:32,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:51:32,842 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-22 03:51:32,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919096237] [2020-08-22 03:51:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919096237] [2020-08-22 03:51:32,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306813295] [2020-08-22 03:51:32,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,892 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-22 03:51:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,922 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-22 03:51:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,927 INFO L225 Difference]: With dead ends: 1500 [2020-08-22 03:51:32,927 INFO L226 Difference]: Without dead ends: 874 [2020-08-22 03:51:32,929 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 [2020-08-22 03:51:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-22 03:51:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-22 03:51:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-22 03:51:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-22 03:51:32,959 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-22 03:51:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,959 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-22 03:51:32,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-22 03:51:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:32,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:51:32,962 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-22 03:51:32,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896374189] [2020-08-22 03:51:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896374189] [2020-08-22 03:51:32,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686250009] [2020-08-22 03:51:32,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,992 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-22 03:51:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,029 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-22 03:51:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 03:51:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,034 INFO L225 Difference]: With dead ends: 1308 [2020-08-22 03:51:33,034 INFO L226 Difference]: Without dead ends: 890 [2020-08-22 03:51:33,037 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 [2020-08-22 03:51:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-22 03:51:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-22 03:51:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-22 03:51:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-22 03:51:33,066 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-22 03:51:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,067 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-22 03:51:33,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-22 03:51:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:33,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:33,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:51:33,069 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-22 03:51:33,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041687109] [2020-08-22 03:51:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041687109] [2020-08-22 03:51:33,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112390323] [2020-08-22 03:51:33,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,102 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-22 03:51:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,148 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-22 03:51:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 03:51:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,155 INFO L225 Difference]: With dead ends: 1548 [2020-08-22 03:51:33,156 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 03:51:33,156 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 [2020-08-22 03:51:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 03:51:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-22 03:51:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-22 03:51:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-22 03:51:33,203 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-22 03:51:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,203 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-22 03:51:33,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-22 03:51:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:33,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:33,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:51:33,208 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-22 03:51:33,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200199149] [2020-08-22 03:51:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200199149] [2020-08-22 03:51:33,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288063568] [2020-08-22 03:51:33,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,247 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-22 03:51:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,310 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-22 03:51:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 03:51:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,321 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 03:51:33,321 INFO L226 Difference]: Without dead ends: 1706 [2020-08-22 03:51:33,324 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 [2020-08-22 03:51:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-22 03:51:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-22 03:51:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-22 03:51:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-22 03:51:33,398 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-22 03:51:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,399 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-22 03:51:33,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-22 03:51:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:51:33,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:33,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:51:33,404 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-22 03:51:33,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331152528] [2020-08-22 03:51:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331152528] [2020-08-22 03:51:33,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307025098] [2020-08-22 03:51:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,447 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-22 03:51:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,491 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-22 03:51:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 03:51:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,501 INFO L225 Difference]: With dead ends: 2556 [2020-08-22 03:51:33,501 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 03:51:33,504 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 [2020-08-22 03:51:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 03:51:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-22 03:51:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-22 03:51:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-22 03:51:33,564 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-22 03:51:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,564 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-22 03:51:33,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-22 03:51:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:51:33,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:33,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:51:33,568 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-22 03:51:33,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380663750] [2020-08-22 03:51:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380663750] [2020-08-22 03:51:33,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082852632] [2020-08-22 03:51:33,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,592 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-22 03:51:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,650 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-22 03:51:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 03:51:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,665 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 03:51:33,665 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 03:51:33,667 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 [2020-08-22 03:51:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 03:51:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-22 03:51:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-22 03:51:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-22 03:51:33,768 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-22 03:51:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,769 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-22 03:51:33,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-22 03:51:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:51:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:33,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:51:33,774 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-22 03:51:33,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248435306] [2020-08-22 03:51:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248435306] [2020-08-22 03:51:33,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18813889] [2020-08-22 03:51:33,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,809 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-22 03:51:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,899 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-22 03:51:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 03:51:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,914 INFO L225 Difference]: With dead ends: 5836 [2020-08-22 03:51:33,914 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 03:51:33,919 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 [2020-08-22 03:51:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 03:51:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-22 03:51:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-22 03:51:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-22 03:51:34,020 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-22 03:51:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:34,021 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-22 03:51:34,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-22 03:51:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:51:34,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:34,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:34,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:51:34,026 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:34,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-22 03:51:34,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:34,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120273938] [2020-08-22 03:51:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:34,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120273938] [2020-08-22 03:51:34,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:34,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:34,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291278000] [2020-08-22 03:51:34,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:34,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:34,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:34,052 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-22 03:51:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:34,110 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-22 03:51:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:34,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 03:51:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:34,126 INFO L225 Difference]: With dead ends: 5004 [2020-08-22 03:51:34,126 INFO L226 Difference]: Without dead ends: 3402 [2020-08-22 03:51:34,131 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 [2020-08-22 03:51:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-22 03:51:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-22 03:51:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-22 03:51:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-22 03:51:34,228 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-22 03:51:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:34,229 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-22 03:51:34,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-22 03:51:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:51:34,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:34,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:34,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 03:51:34,260 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-22 03:51:34,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:34,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429383382] [2020-08-22 03:51:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:34,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429383382] [2020-08-22 03:51:34,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:34,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:34,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059803046] [2020-08-22 03:51:34,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:34,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:34,283 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-22 03:51:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:34,388 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-22 03:51:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:34,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 03:51:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:34,446 INFO L225 Difference]: With dead ends: 9804 [2020-08-22 03:51:34,447 INFO L226 Difference]: Without dead ends: 6538 [2020-08-22 03:51:34,456 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 [2020-08-22 03:51:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-22 03:51:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-22 03:51:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 03:51:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-22 03:51:34,690 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-22 03:51:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:34,690 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-22 03:51:34,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-22 03:51:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:51:34,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:34,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:34,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 03:51:34,699 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-22 03:51:34,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:34,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289087787] [2020-08-22 03:51:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:34,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289087787] [2020-08-22 03:51:34,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:34,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:34,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331524907] [2020-08-22 03:51:34,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:34,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:34,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:34,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:34,732 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-22 03:51:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:34,858 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-22 03:51:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:34,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 03:51:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:34,875 INFO L225 Difference]: With dead ends: 7052 [2020-08-22 03:51:34,875 INFO L226 Difference]: Without dead ends: 7050 [2020-08-22 03:51:34,879 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 [2020-08-22 03:51:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-22 03:51:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-22 03:51:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 03:51:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-22 03:51:35,110 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-22 03:51:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,111 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-22 03:51:35,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-22 03:51:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 03:51:35,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:35,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:35,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 03:51:35,121 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-22 03:51:35,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:35,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262578257] [2020-08-22 03:51:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:35,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262578257] [2020-08-22 03:51:35,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:35,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:35,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287209439] [2020-08-22 03:51:35,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:35,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:35,146 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-22 03:51:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:35,293 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-22 03:51:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:35,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 03:51:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:35,316 INFO L225 Difference]: With dead ends: 10634 [2020-08-22 03:51:35,317 INFO L226 Difference]: Without dead ends: 10632 [2020-08-22 03:51:35,322 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 [2020-08-22 03:51:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-22 03:51:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-22 03:51:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-22 03:51:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-22 03:51:35,594 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-22 03:51:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,595 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-22 03:51:35,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-22 03:51:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 03:51:35,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:35,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:35,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 03:51:35,611 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-22 03:51:35,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:35,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37359271] [2020-08-22 03:51:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:35,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37359271] [2020-08-22 03:51:35,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:35,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:35,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527371814] [2020-08-22 03:51:35,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:35,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:35,636 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-22 03:51:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:35,833 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-22 03:51:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:35,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 03:51:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:35,834 INFO L225 Difference]: With dead ends: 22664 [2020-08-22 03:51:35,834 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:51:35,867 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 [2020-08-22 03:51:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:51:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:51:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:51:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:51:35,868 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-22 03:51:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:35,868 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:51:35,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:51:35,869 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:51:35,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 03:51:35,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:51:35,899 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:35,900 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:51:35,900 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,900 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-22 03:51:35,901 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,901 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-22 03:51:35,901 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,901 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-22 03:51:35,901 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,902 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,902 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-22 03:51:35,903 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-22 03:51:35,903 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-22 03:51:35,903 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,903 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-22 03:51:35,903 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,903 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-22 03:51:35,904 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-22 03:51:35,904 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-22 03:51:35,904 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-22 03:51:35,904 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,904 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,904 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,904 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-22 03:51:35,904 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-22 03:51:35,905 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-22 03:51:35,906 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,906 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 03:51:35,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:51:35 BoogieIcfgContainer [2020-08-22 03:51:35,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:51:35,930 INFO L168 Benchmark]: Toolchain (without parser) took 5648.56 ms. Allocated memory was 138.9 MB in the beginning and 343.9 MB in the end (delta: 205.0 MB). Free memory was 101.8 MB in the beginning and 150.2 MB in the end (delta: -48.4 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:35,931 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:51:35,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.75 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:35,932 INFO L168 Benchmark]: Boogie Preprocessor took 131.13 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 178.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:35,934 INFO L168 Benchmark]: RCFGBuilder took 353.33 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 160.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:35,939 INFO L168 Benchmark]: TraceAbstraction took 4882.66 ms. Allocated memory was 201.3 MB in the beginning and 343.9 MB in the end (delta: 142.6 MB). Free memory was 160.0 MB in the beginning and 150.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 152.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:35,941 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.75 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.13 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 178.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 353.33 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 160.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4882.66 ms. Allocated memory was 201.3 MB in the beginning and 343.9 MB in the end (delta: 142.6 MB). Free memory was 160.0 MB in the beginning and 150.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 152.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...