/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:25:37,121 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 01:25:37,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:25:37,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:25:37,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:25:37,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:25:37,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:25:37,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:25:37,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:25:37,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:25:37,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:25:37,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:25:37,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:25:37,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:25:37,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:25:37,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:25:37,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:25:37,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:25:37,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:25:37,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:25:37,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:25:37,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:25:37,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:25:37,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:25:37,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:25:37,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:25:37,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:25:37,267 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:25:37,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:25:37,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:25:37,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:25:37,270 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:25:37,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:25:37,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:25:37,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:25:37,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:25:37,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:25:37,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:25:37,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:25:37,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:25:37,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:25:37,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:25:37,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:25:37,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:25:37,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:25:37,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:25:37,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:25:37,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:25:37,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:37,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:25:37,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:25:37,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:25:37,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:25:37,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:25:37,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:25:37,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:25:37,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:25:37,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:25:37,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:25:37,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:25:37,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:25:37,588 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:25:37,588 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 01:25:37,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1ae9ea94/91373fea36ee4187b90e34a90bfca349/FLAG279a3351e [2020-08-22 01:25:38,140 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:25:38,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 01:25:38,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1ae9ea94/91373fea36ee4187b90e34a90bfca349/FLAG279a3351e [2020-08-22 01:25:38,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1ae9ea94/91373fea36ee4187b90e34a90bfca349 [2020-08-22 01:25:38,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:25:38,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:25:38,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:38,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:25:38,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:25:38,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a03fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38, skipping insertion in model container [2020-08-22 01:25:38,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:25:38,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:25:38,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:38,775 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:25:38,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:38,850 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:25:38,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38 WrapperNode [2020-08-22 01:25:38,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:38,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:25:38,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:25:38,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:25:38,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... [2020-08-22 01:25:38,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:25:38,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:25:38,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:25:38,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:25:38,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:25:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:25:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:25:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:25:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:25:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:25:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:25:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:25:39,384 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:25:39,385 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 01:25:39,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:39 BoogieIcfgContainer [2020-08-22 01:25:39,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:25:39,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:25:39,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:25:39,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:25:39,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:25:38" (1/3) ... [2020-08-22 01:25:39,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:39, skipping insertion in model container [2020-08-22 01:25:39,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:38" (2/3) ... [2020-08-22 01:25:39,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:39, skipping insertion in model container [2020-08-22 01:25:39,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:39" (3/3) ... [2020-08-22 01:25:39,404 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 01:25:39,419 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:25:39,427 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:25:39,444 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:25:39,474 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:25:39,474 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:25:39,475 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:25:39,475 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:25:39,475 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:25:39,475 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:25:39,476 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:25:39,476 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:25:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 01:25:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:39,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:39,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:39,508 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-22 01:25:39,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:39,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776333676] [2020-08-22 01:25:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:39,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776333676] [2020-08-22 01:25:39,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:39,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:39,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029067750] [2020-08-22 01:25:39,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:39,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:39,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:39,819 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 01:25:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:39,912 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-22 01:25:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:39,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:39,929 INFO L225 Difference]: With dead ends: 93 [2020-08-22 01:25:39,929 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:25:39,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:25:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-22 01:25:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 01:25:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-22 01:25:39,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-22 01:25:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:39,995 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-22 01:25:39,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-22 01:25:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:39,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:39,997 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] [2020-08-22 01:25:39,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:25:39,998 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-22 01:25:39,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:39,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212865899] [2020-08-22 01:25:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212865899] [2020-08-22 01:25:40,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043501619] [2020-08-22 01:25:40,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,096 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-22 01:25:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,145 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-22 01:25:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,149 INFO L225 Difference]: With dead ends: 127 [2020-08-22 01:25:40,149 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:25:40,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:25:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 01:25:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 01:25:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-22 01:25:40,168 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-22 01:25:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,168 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-22 01:25:40,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-22 01:25:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:40,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:25:40,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-22 01:25:40,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763613424] [2020-08-22 01:25:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763613424] [2020-08-22 01:25:40,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117972280] [2020-08-22 01:25:40,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,233 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-22 01:25:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,259 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-22 01:25:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,261 INFO L225 Difference]: With dead ends: 117 [2020-08-22 01:25:40,261 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 01:25:40,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 01:25:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-22 01:25:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:25:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-22 01:25:40,280 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-22 01:25:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,280 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-22 01:25:40,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-22 01:25:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:40,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:25:40,283 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-22 01:25:40,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982643344] [2020-08-22 01:25:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982643344] [2020-08-22 01:25:40,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305581867] [2020-08-22 01:25:40,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,370 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-22 01:25:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,400 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-22 01:25:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,403 INFO L225 Difference]: With dead ends: 148 [2020-08-22 01:25:40,403 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 01:25:40,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 01:25:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-22 01:25:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 01:25:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-22 01:25:40,416 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-22 01:25:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,417 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-22 01:25:40,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-22 01:25:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:40,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:25:40,420 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-22 01:25:40,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197752027] [2020-08-22 01:25:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197752027] [2020-08-22 01:25:40,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001955035] [2020-08-22 01:25:40,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,463 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-22 01:25:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,487 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-22 01:25:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,491 INFO L225 Difference]: With dead ends: 244 [2020-08-22 01:25:40,491 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 01:25:40,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 01:25:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-22 01:25:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-22 01:25:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-22 01:25:40,521 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-22 01:25:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,521 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-22 01:25:40,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-22 01:25:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:40,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:25:40,525 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-22 01:25:40,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697532530] [2020-08-22 01:25:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697532530] [2020-08-22 01:25:40,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961258887] [2020-08-22 01:25:40,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,568 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-22 01:25:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,588 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-22 01:25:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,591 INFO L225 Difference]: With dead ends: 219 [2020-08-22 01:25:40,591 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 01:25:40,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 01:25:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-22 01:25:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 01:25:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-22 01:25:40,646 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-22 01:25:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,648 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-22 01:25:40,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-22 01:25:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:40,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:25:40,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-22 01:25:40,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755097268] [2020-08-22 01:25:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755097268] [2020-08-22 01:25:40,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771936090] [2020-08-22 01:25:40,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,712 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-22 01:25:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,745 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-22 01:25:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,750 INFO L225 Difference]: With dead ends: 276 [2020-08-22 01:25:40,750 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 01:25:40,750 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 [2020-08-22 01:25:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 01:25:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-22 01:25:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 01:25:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-22 01:25:40,771 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-22 01:25:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,772 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-22 01:25:40,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-22 01:25:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:40,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:25:40,774 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-22 01:25:40,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492163927] [2020-08-22 01:25:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492163927] [2020-08-22 01:25:40,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205370124] [2020-08-22 01:25:40,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,856 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-22 01:25:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:40,902 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-22 01:25:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:40,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:40,908 INFO L225 Difference]: With dead ends: 472 [2020-08-22 01:25:40,908 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 01:25:40,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 01:25:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-22 01:25:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 01:25:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-22 01:25:40,937 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-22 01:25:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:40,937 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-22 01:25:40,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-22 01:25:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:25:40,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:40,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:40,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:25:40,941 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-22 01:25:40,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:40,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620278405] [2020-08-22 01:25:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:40,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620278405] [2020-08-22 01:25:40,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:40,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:40,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823081422] [2020-08-22 01:25:40,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:40,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:40,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:40,998 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-22 01:25:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,022 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-22 01:25:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 01:25:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,025 INFO L225 Difference]: With dead ends: 420 [2020-08-22 01:25:41,026 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 01:25:41,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 01:25:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-22 01:25:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-22 01:25:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-22 01:25:41,045 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-22 01:25:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,045 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-22 01:25:41,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-22 01:25:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:25:41,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:25:41,048 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-22 01:25:41,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516124027] [2020-08-22 01:25:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516124027] [2020-08-22 01:25:41,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978450826] [2020-08-22 01:25:41,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,090 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-22 01:25:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,111 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-22 01:25:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 01:25:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,115 INFO L225 Difference]: With dead ends: 524 [2020-08-22 01:25:41,115 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 01:25:41,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 01:25:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-22 01:25:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-22 01:25:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-22 01:25:41,130 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-22 01:25:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,130 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-22 01:25:41,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-22 01:25:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:25:41,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:25:41,132 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-22 01:25:41,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795063957] [2020-08-22 01:25:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795063957] [2020-08-22 01:25:41,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027834357] [2020-08-22 01:25:41,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,159 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-22 01:25:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,183 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-22 01:25:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 01:25:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,187 INFO L225 Difference]: With dead ends: 924 [2020-08-22 01:25:41,187 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 01:25:41,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 01:25:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-22 01:25:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-22 01:25:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-22 01:25:41,207 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-22 01:25:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,207 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-22 01:25:41,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-22 01:25:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:25:41,209 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-22 01:25:41,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926619237] [2020-08-22 01:25:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926619237] [2020-08-22 01:25:41,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965091780] [2020-08-22 01:25:41,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,238 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-22 01:25:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,260 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-22 01:25:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 01:25:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,275 INFO L225 Difference]: With dead ends: 816 [2020-08-22 01:25:41,275 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 01:25:41,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 01:25:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-22 01:25:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-22 01:25:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-22 01:25:41,293 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-22 01:25:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,294 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-22 01:25:41,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-22 01:25:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:41,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:25:41,296 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-22 01:25:41,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989829527] [2020-08-22 01:25:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989829527] [2020-08-22 01:25:41,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146420088] [2020-08-22 01:25:41,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,322 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-22 01:25:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,346 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-22 01:25:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 01:25:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,352 INFO L225 Difference]: With dead ends: 1004 [2020-08-22 01:25:41,352 INFO L226 Difference]: Without dead ends: 1002 [2020-08-22 01:25:41,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-22 01:25:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-22 01:25:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 01:25:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-22 01:25:41,378 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-22 01:25:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,378 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-22 01:25:41,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-22 01:25:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:41,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:25:41,381 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-22 01:25:41,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400816027] [2020-08-22 01:25:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400816027] [2020-08-22 01:25:41,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006667873] [2020-08-22 01:25:41,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,409 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-22 01:25:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,445 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-22 01:25:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 01:25:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,452 INFO L225 Difference]: With dead ends: 1820 [2020-08-22 01:25:41,453 INFO L226 Difference]: Without dead ends: 1066 [2020-08-22 01:25:41,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-22 01:25:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-22 01:25:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-22 01:25:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-22 01:25:41,494 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-22 01:25:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,495 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-22 01:25:41,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-22 01:25:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 01:25:41,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:25:41,498 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-22 01:25:41,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772830350] [2020-08-22 01:25:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772830350] [2020-08-22 01:25:41,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939476455] [2020-08-22 01:25:41,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,524 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-22 01:25:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,563 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-22 01:25:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 01:25:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,569 INFO L225 Difference]: With dead ends: 1596 [2020-08-22 01:25:41,570 INFO L226 Difference]: Without dead ends: 1082 [2020-08-22 01:25:41,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-22 01:25:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-22 01:25:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-22 01:25:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-22 01:25:41,604 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-22 01:25:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,606 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-22 01:25:41,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-22 01:25:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 01:25:41,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:25:41,608 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-22 01:25:41,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725869] [2020-08-22 01:25:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725869] [2020-08-22 01:25:41,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900926294] [2020-08-22 01:25:41,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,658 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-22 01:25:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,694 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-22 01:25:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 01:25:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,704 INFO L225 Difference]: With dead ends: 1932 [2020-08-22 01:25:41,705 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 01:25:41,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 01:25:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-22 01:25:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 01:25:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-22 01:25:41,756 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-22 01:25:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,757 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-22 01:25:41,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-22 01:25:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 01:25:41,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:25:41,761 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-22 01:25:41,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950243127] [2020-08-22 01:25:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950243127] [2020-08-22 01:25:41,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442918976] [2020-08-22 01:25:41,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,784 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-22 01:25:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,843 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-22 01:25:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:41,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 01:25:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,857 INFO L225 Difference]: With dead ends: 3596 [2020-08-22 01:25:41,857 INFO L226 Difference]: Without dead ends: 2090 [2020-08-22 01:25:41,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-22 01:25:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-22 01:25:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-22 01:25:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-22 01:25:41,949 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-22 01:25:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,949 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-22 01:25:41,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-22 01:25:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 01:25:41,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:25:41,955 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-22 01:25:41,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404593692] [2020-08-22 01:25:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:41,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404593692] [2020-08-22 01:25:41,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:41,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:41,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256333607] [2020-08-22 01:25:41,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:41,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:41,980 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-22 01:25:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:42,041 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-22 01:25:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:42,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 01:25:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:42,057 INFO L225 Difference]: With dead ends: 3132 [2020-08-22 01:25:42,058 INFO L226 Difference]: Without dead ends: 2122 [2020-08-22 01:25:42,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-22 01:25:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-22 01:25:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-22 01:25:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-22 01:25:42,142 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-22 01:25:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:42,142 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-22 01:25:42,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-22 01:25:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 01:25:42,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:42,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:42,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:25:42,146 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:42,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-22 01:25:42,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:42,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192353299] [2020-08-22 01:25:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:42,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192353299] [2020-08-22 01:25:42,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:42,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:42,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975977269] [2020-08-22 01:25:42,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:42,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,173 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-22 01:25:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:42,245 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-22 01:25:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:42,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 01:25:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:42,267 INFO L225 Difference]: With dead ends: 3724 [2020-08-22 01:25:42,267 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 01:25:42,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 01:25:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-22 01:25:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-22 01:25:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-22 01:25:42,352 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-22 01:25:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:42,353 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-22 01:25:42,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-22 01:25:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 01:25:42,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:42,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:42,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:25:42,360 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-22 01:25:42,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:42,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845158376] [2020-08-22 01:25:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:42,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845158376] [2020-08-22 01:25:42,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:42,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:42,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187435287] [2020-08-22 01:25:42,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:42,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:42,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,393 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-22 01:25:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:42,470 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-22 01:25:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:42,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 01:25:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:42,490 INFO L225 Difference]: With dead ends: 7116 [2020-08-22 01:25:42,491 INFO L226 Difference]: Without dead ends: 4106 [2020-08-22 01:25:42,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-22 01:25:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-22 01:25:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-22 01:25:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-22 01:25:42,621 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-22 01:25:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:42,621 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-22 01:25:42,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-22 01:25:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:25:42,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:42,628 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, 1] [2020-08-22 01:25:42,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:25:42,628 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-22 01:25:42,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:42,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357907647] [2020-08-22 01:25:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:42,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357907647] [2020-08-22 01:25:42,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:42,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:42,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408989261] [2020-08-22 01:25:42,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:42,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,653 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-22 01:25:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:42,738 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-22 01:25:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:42,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 01:25:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:42,759 INFO L225 Difference]: With dead ends: 6156 [2020-08-22 01:25:42,759 INFO L226 Difference]: Without dead ends: 4170 [2020-08-22 01:25:42,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-22 01:25:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-22 01:25:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-22 01:25:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-22 01:25:42,872 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-22 01:25:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:42,873 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-22 01:25:42,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-22 01:25:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:25:42,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:42,878 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, 1] [2020-08-22 01:25:42,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:25:42,879 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-22 01:25:42,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:42,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264375909] [2020-08-22 01:25:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:42,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264375909] [2020-08-22 01:25:42,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:42,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:42,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074929300] [2020-08-22 01:25:42,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:42,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:42,903 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-22 01:25:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:43,003 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-22 01:25:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:43,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 01:25:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:43,021 INFO L225 Difference]: With dead ends: 12108 [2020-08-22 01:25:43,021 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 01:25:43,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 01:25:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-22 01:25:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 01:25:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-22 01:25:43,446 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-22 01:25:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:43,447 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-22 01:25:43,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-22 01:25:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:25:43,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:43,456 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, 1] [2020-08-22 01:25:43,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:25:43,456 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-22 01:25:43,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:43,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868583534] [2020-08-22 01:25:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:43,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868583534] [2020-08-22 01:25:43,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:43,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:43,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091404823] [2020-08-22 01:25:43,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:43,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:43,510 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-22 01:25:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:43,620 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-22 01:25:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:43,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 01:25:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:43,639 INFO L225 Difference]: With dead ends: 9100 [2020-08-22 01:25:43,639 INFO L226 Difference]: Without dead ends: 9098 [2020-08-22 01:25:43,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-22 01:25:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-22 01:25:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 01:25:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-22 01:25:43,810 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-22 01:25:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:43,810 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-22 01:25:43,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-22 01:25:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 01:25:43,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:43,820 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, 1, 1] [2020-08-22 01:25:43,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:25:43,820 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-22 01:25:43,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:43,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665594789] [2020-08-22 01:25:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:43,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665594789] [2020-08-22 01:25:43,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:43,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:43,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701894134] [2020-08-22 01:25:43,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:43,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:43,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:43,859 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-22 01:25:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:44,084 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-22 01:25:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:44,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 01:25:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:44,116 INFO L225 Difference]: With dead ends: 13708 [2020-08-22 01:25:44,116 INFO L226 Difference]: Without dead ends: 13706 [2020-08-22 01:25:44,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-22 01:25:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-22 01:25:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-22 01:25:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-22 01:25:44,393 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-22 01:25:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:44,393 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-22 01:25:44,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-22 01:25:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 01:25:44,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:44,412 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, 1, 1] [2020-08-22 01:25:44,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:25:44,413 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-22 01:25:44,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:44,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220658608] [2020-08-22 01:25:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:44,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220658608] [2020-08-22 01:25:44,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:44,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:44,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719035433] [2020-08-22 01:25:44,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:44,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:44,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:44,441 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-22 01:25:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:44,645 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-22 01:25:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:44,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 01:25:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:44,801 INFO L225 Difference]: With dead ends: 27788 [2020-08-22 01:25:44,801 INFO L226 Difference]: Without dead ends: 15754 [2020-08-22 01:25:44,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-22 01:25:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-22 01:25:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-22 01:25:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-22 01:25:45,240 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-22 01:25:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:45,240 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-22 01:25:45,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-22 01:25:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:25:45,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:45,268 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, 1, 1, 1] [2020-08-22 01:25:45,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:25:45,268 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-22 01:25:45,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:45,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740428450] [2020-08-22 01:25:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:45,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740428450] [2020-08-22 01:25:45,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:45,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:45,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81486868] [2020-08-22 01:25:45,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:45,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:45,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:45,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,312 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-22 01:25:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:45,929 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-22 01:25:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:45,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 01:25:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:45,957 INFO L225 Difference]: With dead ends: 23820 [2020-08-22 01:25:45,958 INFO L226 Difference]: Without dead ends: 16138 [2020-08-22 01:25:45,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-22 01:25:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-22 01:25:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-22 01:25:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-22 01:25:46,271 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-22 01:25:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,271 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-22 01:25:46,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-22 01:25:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:25:46,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,291 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, 1, 1, 1] [2020-08-22 01:25:46,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:25:46,292 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-22 01:25:46,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123160962] [2020-08-22 01:25:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:46,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123160962] [2020-08-22 01:25:46,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530135602] [2020-08-22 01:25:46,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,316 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-22 01:25:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,729 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-22 01:25:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 01:25:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,779 INFO L225 Difference]: With dead ends: 26636 [2020-08-22 01:25:46,779 INFO L226 Difference]: Without dead ends: 26634 [2020-08-22 01:25:46,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-22 01:25:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-22 01:25:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-22 01:25:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-22 01:25:47,201 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-22 01:25:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,201 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-22 01:25:47,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-22 01:25:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:25:47,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,234 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, 1, 1, 1] [2020-08-22 01:25:47,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:25:47,235 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,235 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-22 01:25:47,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88060692] [2020-08-22 01:25:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:47,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88060692] [2020-08-22 01:25:47,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916169311] [2020-08-22 01:25:47,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,262 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-22 01:25:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,699 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-22 01:25:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 01:25:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,755 INFO L225 Difference]: With dead ends: 55308 [2020-08-22 01:25:47,755 INFO L226 Difference]: Without dead ends: 31242 [2020-08-22 01:25:47,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-22 01:25:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-22 01:25:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-22 01:25:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-22 01:25:48,375 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-22 01:25:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,375 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-22 01:25:48,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-22 01:25:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:25:48,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,401 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, 1, 1, 1, 1] [2020-08-22 01:25:48,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:25:48,401 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-22 01:25:48,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071099402] [2020-08-22 01:25:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:48,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071099402] [2020-08-22 01:25:48,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136248347] [2020-08-22 01:25:48,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,428 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-22 01:25:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,941 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-22 01:25:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 01:25:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:49,013 INFO L225 Difference]: With dead ends: 46860 [2020-08-22 01:25:49,013 INFO L226 Difference]: Without dead ends: 31754 [2020-08-22 01:25:49,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-22 01:25:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-22 01:25:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-22 01:25:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-22 01:25:49,618 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-22 01:25:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,619 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-22 01:25:49,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-22 01:25:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:25:49,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,640 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, 1, 1, 1, 1] [2020-08-22 01:25:49,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:25:49,640 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-22 01:25:49,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503179884] [2020-08-22 01:25:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:49,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503179884] [2020-08-22 01:25:49,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:49,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:49,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492734986] [2020-08-22 01:25:49,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:49,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,662 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-22 01:25:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:50,257 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-22 01:25:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:50,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 01:25:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:50,318 INFO L225 Difference]: With dead ends: 51210 [2020-08-22 01:25:50,319 INFO L226 Difference]: Without dead ends: 51208 [2020-08-22 01:25:50,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-22 01:25:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-22 01:25:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-22 01:25:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-22 01:25:52,411 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-22 01:25:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:52,411 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-22 01:25:52,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-22 01:25:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:25:52,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:52,448 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, 1, 1, 1, 1] [2020-08-22 01:25:52,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:25:52,448 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-22 01:25:52,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:52,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161841543] [2020-08-22 01:25:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:52,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161841543] [2020-08-22 01:25:52,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:52,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:52,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931060920] [2020-08-22 01:25:52,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:52,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:52,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:52,484 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-22 01:25:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:53,140 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-22 01:25:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:53,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 01:25:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:53,141 INFO L225 Difference]: With dead ends: 109576 [2020-08-22 01:25:53,141 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:25:53,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:25:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:25:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:25:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:25:53,240 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-22 01:25:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:53,240 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:25:53,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:25:53,241 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:25:53,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:25:53,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 01:25:53,279 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 01:25:53,279 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:25:53,279 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:25:53,279 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 01:25:53,279 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 01:25:53,279 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 01:25:53,280 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-22 01:25:53,280 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-22 01:25:53,280 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-22 01:25:53,280 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-22 01:25:53,280 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-22 01:25:53,280 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-22 01:25:53,280 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,281 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,282 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-22 01:25:53,284 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,284 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,285 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,286 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 01:25:53,287 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-22 01:25:53,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:25:53 BoogieIcfgContainer [2020-08-22 01:25:53,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:25:53,315 INFO L168 Benchmark]: Toolchain (without parser) took 14847.48 ms. Allocated memory was 138.4 MB in the beginning and 1.0 GB in the end (delta: 909.6 MB). Free memory was 100.7 MB in the beginning and 432.9 MB in the end (delta: -332.2 MB). Peak memory consumption was 577.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,320 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:25:53,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.33 ms. Allocated memory is still 138.4 MB. Free memory was 100.5 MB in the beginning and 89.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,324 INFO L168 Benchmark]: Boogie Preprocessor took 128.73 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 89.5 MB in the beginning and 178.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,324 INFO L168 Benchmark]: RCFGBuilder took 410.63 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 158.1 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,325 INFO L168 Benchmark]: TraceAbstraction took 13919.81 ms. Allocated memory was 201.3 MB in the beginning and 1.0 GB in the end (delta: 846.7 MB). Free memory was 158.1 MB in the beginning and 432.9 MB in the end (delta: -274.9 MB). Peak memory consumption was 571.9 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:53,331 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.33 ms. Allocated memory is still 138.4 MB. Free memory was 100.5 MB in the beginning and 89.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.73 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 89.5 MB in the beginning and 178.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.63 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 158.1 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13919.81 ms. Allocated memory was 201.3 MB in the beginning and 1.0 GB in the end (delta: 846.7 MB). Free memory was 158.1 MB in the beginning and 432.9 MB in the end (delta: -274.9 MB). Peak memory consumption was 571.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.7s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...