/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 [2020-08-21 16:32:34,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:32:34,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:32:34,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:32:34,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:32:34,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:32:34,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:32:34,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:32:34,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:32:34,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:32:34,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:32:34,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:32:34,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:32:34,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:32:34,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:32:34,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:32:34,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:32:34,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:32:34,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:32:34,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:32:34,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:32:34,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:32:34,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:32:34,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:32:34,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:32:34,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:32:34,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:32:34,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:32:34,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:32:34,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:32:34,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:32:34,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:32:34,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:32:34,666 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:32:34,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:32:34,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:32:34,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:32:34,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:32:34,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:32:34,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:32:34,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:32:34,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:32:34,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:32:34,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:32:34,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:32:34,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:32:34,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:32:34,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:32:34,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:32:34,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:32:34,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:32:34,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:32:34,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:32:34,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:32:34,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:32:34,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:32:34,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:32:34,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:32:34,672 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:32:35,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:32:35,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:32:35,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:32:35,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:32:35,046 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:32:35,048 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 16:32:35,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c08dc04d/7010e435cec4478ba4ed7ff7e4208a34/FLAG72797e8f0 [2020-08-21 16:32:35,517 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:32:35,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 16:32:35,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c08dc04d/7010e435cec4478ba4ed7ff7e4208a34/FLAG72797e8f0 [2020-08-21 16:32:35,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c08dc04d/7010e435cec4478ba4ed7ff7e4208a34 [2020-08-21 16:32:35,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:32:35,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:32:35,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:32:35,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:32:35,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:32:35,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7636aefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35, skipping insertion in model container [2020-08-21 16:32:35,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:32:35,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:32:36,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:32:36,181 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:32:36,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:32:36,223 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:32:36,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36 WrapperNode [2020-08-21 16:32:36,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:32:36,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:32:36,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:32:36,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:32:36,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... [2020-08-21 16:32:36,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:32:36,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:32:36,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:32:36,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:32:36,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:32:36,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:32:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:32:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:32:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:32:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:32:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:32:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:32:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:32:36,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:32:36,825 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:32:36,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:32:36 BoogieIcfgContainer [2020-08-21 16:32:36,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:32:36,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:32:36,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:32:36,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:32:36,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:32:35" (1/3) ... [2020-08-21 16:32:36,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d81f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:32:36, skipping insertion in model container [2020-08-21 16:32:36,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:36" (2/3) ... [2020-08-21 16:32:36,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d81f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:32:36, skipping insertion in model container [2020-08-21 16:32:36,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:32:36" (3/3) ... [2020-08-21 16:32:36,841 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 16:32:36,860 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:32:36,878 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:32:36,900 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:32:36,934 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:32:36,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:32:36,935 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:32:36,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:32:36,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:32:36,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:32:36,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:32:36,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:32:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 16:32:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:36,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,984 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 16:32:36,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380200051] [2020-08-21 16:32:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380200051] [2020-08-21 16:32:37,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354739835] [2020-08-21 16:32:37,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,208 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 16:32:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,271 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 16:32:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,284 INFO L225 Difference]: With dead ends: 81 [2020-08-21 16:32:37,284 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 16:32:37,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 16:32:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 16:32:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 16:32:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 16:32:37,331 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 16:32:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,331 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 16:32:37,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 16:32:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:37,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:37,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:32:37,334 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,335 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 16:32:37,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729058242] [2020-08-21 16:32:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729058242] [2020-08-21 16:32:37,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154027746] [2020-08-21 16:32:37,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,421 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 16:32:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,453 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 16:32:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,456 INFO L225 Difference]: With dead ends: 107 [2020-08-21 16:32:37,456 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 16:32:37,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 16:32:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 16:32:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 16:32:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 16:32:37,469 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 16:32:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,470 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 16:32:37,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 16:32:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:37,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,471 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] [2020-08-21 16:32:37,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:32:37,472 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 16:32:37,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014648308] [2020-08-21 16:32:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014648308] [2020-08-21 16:32:37,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119557712] [2020-08-21 16:32:37,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,546 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 16:32:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,585 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 16:32:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,588 INFO L225 Difference]: With dead ends: 99 [2020-08-21 16:32:37,588 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 16:32:37,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 16:32:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 16:32:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 16:32:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 16:32:37,600 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 16:32:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,601 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 16:32:37,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 16:32:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:37,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,603 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] [2020-08-21 16:32:37,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:32:37,603 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 16:32:37,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312394426] [2020-08-21 16:32:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312394426] [2020-08-21 16:32:37,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680683847] [2020-08-21 16:32:37,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,660 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 16:32:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,701 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 16:32:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,704 INFO L225 Difference]: With dead ends: 124 [2020-08-21 16:32:37,705 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 16:32:37,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 16:32:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 16:32:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 16:32:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 16:32:37,728 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 16:32:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,729 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 16:32:37,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 16:32:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:37,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,730 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] [2020-08-21 16:32:37,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:32:37,731 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 16:32:37,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942211010] [2020-08-21 16:32:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942211010] [2020-08-21 16:32:37,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593655358] [2020-08-21 16:32:37,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,810 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 16:32:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,842 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 16:32:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,845 INFO L225 Difference]: With dead ends: 204 [2020-08-21 16:32:37,845 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 16:32:37,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 16:32:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 16:32:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 16:32:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 16:32:37,861 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 16:32:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,862 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 16:32:37,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 16:32:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:37,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,863 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] [2020-08-21 16:32:37,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:32:37,864 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 16:32:37,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321563994] [2020-08-21 16:32:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321563994] [2020-08-21 16:32:37,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950823250] [2020-08-21 16:32:37,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,908 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 16:32:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,943 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 16:32:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,946 INFO L225 Difference]: With dead ends: 183 [2020-08-21 16:32:37,946 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 16:32:37,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 16:32:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 16:32:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 16:32:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 16:32:37,962 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 16:32:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,962 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 16:32:37,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 16:32:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:37,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,964 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] [2020-08-21 16:32:37,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:32:37,964 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 16:32:37,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112094705] [2020-08-21 16:32:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112094705] [2020-08-21 16:32:37,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110062089] [2020-08-21 16:32:37,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,000 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 16:32:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,019 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 16:32:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,021 INFO L225 Difference]: With dead ends: 228 [2020-08-21 16:32:38,021 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 16:32:38,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 16:32:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 16:32:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 16:32:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 16:32:38,036 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 16:32:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,037 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 16:32:38,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 16:32:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:38,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,039 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] [2020-08-21 16:32:38,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:32:38,039 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 16:32:38,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651997451] [2020-08-21 16:32:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651997451] [2020-08-21 16:32:38,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057170087] [2020-08-21 16:32:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,092 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 16:32:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,115 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 16:32:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,117 INFO L225 Difference]: With dead ends: 392 [2020-08-21 16:32:38,117 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 16:32:38,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 16:32:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 16:32:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 16:32:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 16:32:38,135 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 16:32:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,135 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 16:32:38,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 16:32:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:32:38,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,138 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] [2020-08-21 16:32:38,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:32:38,138 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 16:32:38,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581747703] [2020-08-21 16:32:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581747703] [2020-08-21 16:32:38,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724600832] [2020-08-21 16:32:38,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,169 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 16:32:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,201 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 16:32:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 16:32:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,206 INFO L225 Difference]: With dead ends: 348 [2020-08-21 16:32:38,207 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 16:32:38,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 16:32:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 16:32:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 16:32:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 16:32:38,225 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 16:32:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,225 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 16:32:38,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 16:32:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:32:38,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,227 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] [2020-08-21 16:32:38,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:32:38,228 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 16:32:38,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470884385] [2020-08-21 16:32:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470884385] [2020-08-21 16:32:38,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889591063] [2020-08-21 16:32:38,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,259 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 16:32:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,279 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 16:32:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 16:32:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,283 INFO L225 Difference]: With dead ends: 428 [2020-08-21 16:32:38,283 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 16:32:38,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 16:32:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 16:32:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 16:32:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 16:32:38,298 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 16:32:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,298 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 16:32:38,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 16:32:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:32:38,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,306 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] [2020-08-21 16:32:38,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:32:38,306 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 16:32:38,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43128095] [2020-08-21 16:32:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43128095] [2020-08-21 16:32:38,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371795388] [2020-08-21 16:32:38,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,368 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 16:32:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,415 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 16:32:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 16:32:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,421 INFO L225 Difference]: With dead ends: 764 [2020-08-21 16:32:38,421 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 16:32:38,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 16:32:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 16:32:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 16:32:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 16:32:38,447 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 16:32:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,449 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 16:32:38,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 16:32:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 16:32:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,451 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] [2020-08-21 16:32:38,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:32:38,451 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 16:32:38,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493890939] [2020-08-21 16:32:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493890939] [2020-08-21 16:32:38,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291367408] [2020-08-21 16:32:38,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,500 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 16:32:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,523 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 16:32:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 16:32:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,527 INFO L225 Difference]: With dead ends: 672 [2020-08-21 16:32:38,528 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 16:32:38,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 16:32:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 16:32:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 16:32:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 16:32:38,549 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 16:32:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,549 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 16:32:38,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 16:32:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 16:32:38,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,552 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] [2020-08-21 16:32:38,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:32:38,556 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 16:32:38,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137241231] [2020-08-21 16:32:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137241231] [2020-08-21 16:32:38,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646494541] [2020-08-21 16:32:38,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,613 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 16:32:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,647 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 16:32:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 16:32:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,652 INFO L225 Difference]: With dead ends: 812 [2020-08-21 16:32:38,652 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 16:32:38,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 16:32:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 16:32:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 16:32:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 16:32:38,676 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 16:32:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,677 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 16:32:38,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 16:32:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 16:32:38,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,679 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] [2020-08-21 16:32:38,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:32:38,679 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 16:32:38,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678240917] [2020-08-21 16:32:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678240917] [2020-08-21 16:32:38,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908837069] [2020-08-21 16:32:38,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,709 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 16:32:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,740 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 16:32:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 16:32:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,745 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 16:32:38,746 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 16:32:38,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 16:32:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 16:32:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 16:32:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 16:32:38,793 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 16:32:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,793 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 16:32:38,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 16:32:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:32:38,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,796 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] [2020-08-21 16:32:38,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:32:38,796 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 16:32:38,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533674204] [2020-08-21 16:32:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533674204] [2020-08-21 16:32:38,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495968884] [2020-08-21 16:32:38,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,824 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 16:32:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,850 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 16:32:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 16:32:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,855 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 16:32:38,855 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 16:32:38,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 16:32:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 16:32:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 16:32:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 16:32:38,884 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 16:32:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,884 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 16:32:38,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 16:32:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:32:38,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,886 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] [2020-08-21 16:32:38,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:32:38,886 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 16:32:38,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884647470] [2020-08-21 16:32:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884647470] [2020-08-21 16:32:38,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735268416] [2020-08-21 16:32:38,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,910 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 16:32:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,943 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 16:32:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 16:32:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,952 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 16:32:38,953 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 16:32:38,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 16:32:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 16:32:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 16:32:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 16:32:38,994 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 16:32:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,995 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 16:32:38,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 16:32:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:32:38,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,997 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] [2020-08-21 16:32:38,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:32:38,998 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 16:32:38,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833744489] [2020-08-21 16:32:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:39,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833744489] [2020-08-21 16:32:39,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:39,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:39,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102225560] [2020-08-21 16:32:39,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:39,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:39,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,021 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 16:32:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:39,077 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 16:32:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:39,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 16:32:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:39,087 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 16:32:39,087 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 16:32:39,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 16:32:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 16:32:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 16:32:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 16:32:39,165 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 16:32:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:39,166 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 16:32:39,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 16:32:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:39,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:39,171 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] [2020-08-21 16:32:39,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 16:32:39,171 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:39,172 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 16:32:39,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:39,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396862532] [2020-08-21 16:32:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:39,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396862532] [2020-08-21 16:32:39,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:39,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:39,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773153001] [2020-08-21 16:32:39,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:39,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,207 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 16:32:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:39,264 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 16:32:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:39,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 16:32:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:39,277 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 16:32:39,277 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 16:32:39,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 16:32:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 16:32:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 16:32:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 16:32:39,386 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 16:32:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:39,387 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 16:32:39,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 16:32:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:39,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:39,390 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] [2020-08-21 16:32:39,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 16:32:39,390 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:39,390 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 16:32:39,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:39,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10096073] [2020-08-21 16:32:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:39,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10096073] [2020-08-21 16:32:39,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:39,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:39,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814721999] [2020-08-21 16:32:39,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:39,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,418 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 16:32:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:39,474 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 16:32:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:39,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 16:32:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:39,489 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 16:32:39,489 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 16:32:39,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 16:32:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 16:32:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 16:32:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 16:32:39,575 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 16:32:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:39,576 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 16:32:39,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 16:32:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:39,580 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] [2020-08-21 16:32:39,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 16:32:39,581 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 16:32:39,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:39,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252313022] [2020-08-21 16:32:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:39,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252313022] [2020-08-21 16:32:39,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:39,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:39,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767544078] [2020-08-21 16:32:39,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:39,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,606 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 16:32:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:39,675 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 16:32:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:39,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 16:32:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:39,690 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 16:32:39,691 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 16:32:39,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 16:32:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 16:32:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 16:32:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 16:32:39,797 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 16:32:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:39,797 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 16:32:39,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 16:32:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:32:39,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:39,802 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] [2020-08-21 16:32:39,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 16:32:39,803 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:39,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 16:32:39,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:39,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221118623] [2020-08-21 16:32:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:39,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221118623] [2020-08-21 16:32:39,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:39,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:39,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107162015] [2020-08-21 16:32:39,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:39,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:39,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:39,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,857 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 16:32:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:39,915 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 16:32:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:39,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 16:32:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:39,931 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 16:32:39,932 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 16:32:39,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 16:32:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 16:32:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 16:32:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 16:32:40,034 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 16:32:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:40,034 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 16:32:40,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 16:32:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:32:40,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:40,038 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] [2020-08-21 16:32:40,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 16:32:40,039 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 16:32:40,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:40,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400833855] [2020-08-21 16:32:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:40,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:40,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400833855] [2020-08-21 16:32:40,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:40,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:40,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751991944] [2020-08-21 16:32:40,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:40,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:40,061 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 16:32:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:40,192 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 16:32:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:40,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 16:32:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:40,242 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 16:32:40,243 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 16:32:40,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 16:32:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 16:32:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 16:32:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 16:32:40,561 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 16:32:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:40,561 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 16:32:40,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 16:32:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:32:40,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:40,571 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, 1, 1, 1, 1] [2020-08-21 16:32:40,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 16:32:40,571 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 16:32:40,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:40,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820586659] [2020-08-21 16:32:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:40,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:40,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820586659] [2020-08-21 16:32:40,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:40,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:40,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601824222] [2020-08-21 16:32:40,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:40,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:40,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:40,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:40,608 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 16:32:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:40,729 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 16:32:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:40,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 16:32:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:40,747 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 16:32:40,747 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 16:32:40,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 16:32:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 16:32:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 16:32:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 16:32:40,928 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 16:32:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:40,929 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 16:32:40,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 16:32:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 16:32:40,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:40,942 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] [2020-08-21 16:32:40,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 16:32:40,942 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 16:32:40,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:40,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918561789] [2020-08-21 16:32:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:40,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:40,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918561789] [2020-08-21 16:32:40,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:40,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:40,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415446181] [2020-08-21 16:32:40,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:40,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:40,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:40,966 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 16:32:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:41,189 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 16:32:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:41,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 16:32:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:41,209 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 16:32:41,209 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 16:32:41,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 16:32:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 16:32:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 16:32:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 16:32:41,416 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 16:32:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:41,417 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 16:32:41,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 16:32:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 16:32:41,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:41,432 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] [2020-08-21 16:32:41,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 16:32:41,432 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 16:32:41,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:41,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004785753] [2020-08-21 16:32:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:41,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004785753] [2020-08-21 16:32:41,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:41,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:41,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957147239] [2020-08-21 16:32:41,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:41,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:41,452 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 16:32:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:41,713 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 16:32:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:41,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 16:32:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:41,714 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 16:32:41,715 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:32:41,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:32:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:32:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:32:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:32:41,748 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 16:32:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:41,749 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:32:41,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:32:41,749 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:32:41,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 16:32:41,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:32:41,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:32:41,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:41,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:41,773 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:32:41,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:32:41,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:32:41,773 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,774 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,775 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 16:32:41,775 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 16:32:41,775 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 16:32:41,775 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,775 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 16:32:41,775 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,775 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,776 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,777 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 16:32:41,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:32:41 BoogieIcfgContainer [2020-08-21 16:32:41,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:32:41,792 INFO L168 Benchmark]: Toolchain (without parser) took 5873.87 ms. Allocated memory was 144.2 MB in the beginning and 331.9 MB in the end (delta: 187.7 MB). Free memory was 107.4 MB in the beginning and 189.8 MB in the end (delta: -82.3 MB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:41,792 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:32:41,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.61 ms. Allocated memory is still 144.2 MB. Free memory was 107.2 MB in the beginning and 96.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:41,794 INFO L168 Benchmark]: Boogie Preprocessor took 175.66 ms. Allocated memory was 144.2 MB in the beginning and 208.1 MB in the end (delta: 64.0 MB). Free memory was 96.7 MB in the beginning and 185.7 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:41,794 INFO L168 Benchmark]: RCFGBuilder took 430.15 ms. Allocated memory is still 208.1 MB. Free memory was 185.7 MB in the beginning and 167.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:41,795 INFO L168 Benchmark]: TraceAbstraction took 4956.84 ms. Allocated memory was 208.1 MB in the beginning and 331.9 MB in the end (delta: 123.7 MB). Free memory was 166.7 MB in the beginning and 189.8 MB in the end (delta: -23.0 MB). Peak memory consumption was 100.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:41,798 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.61 ms. Allocated memory is still 144.2 MB. Free memory was 107.2 MB in the beginning and 96.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 175.66 ms. Allocated memory was 144.2 MB in the beginning and 208.1 MB in the end (delta: 64.0 MB). Free memory was 96.7 MB in the beginning and 185.7 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.15 ms. Allocated memory is still 208.1 MB. Free memory was 185.7 MB in the beginning and 167.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4956.84 ms. Allocated memory was 208.1 MB in the beginning and 331.9 MB in the end (delta: 123.7 MB). Free memory was 166.7 MB in the beginning and 189.8 MB in the end (delta: -23.0 MB). Peak memory consumption was 100.7 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: 4.8s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, 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...