/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=1.0 --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 02:14:16,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:14:16,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:14:16,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:14:16,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:14:16,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:14:16,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:14:16,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:14:16,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:14:16,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:14:16,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:14:16,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:14:16,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:14:16,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:14:16,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:14:16,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:14:16,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:14:16,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:14:16,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:14:16,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:14:16,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:14:16,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:14:16,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:14:16,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:14:16,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:14:16,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:14:16,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:14:16,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:14:16,438 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 02:14:16,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:14:16,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:14:16,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:14:16,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:14:16,480 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:14:16,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:14:16,481 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:14:16,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:14:16,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:14:16,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:14:16,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:14:16,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:14:16,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:14:16,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:14:16,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:14:16,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:14:16,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:14:16,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:14:16,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:14:16,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:14:16,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:14:16,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:16,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:14:16,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:14:16,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:14:16,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:14:16,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:14:16,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:14:16,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:14:16,487 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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-08-22 02:14:16,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:14:16,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:14:16,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:14:16,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:14:16,865 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:14:16,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 02:14:16,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa6d3a7bf/7ef10909f00d49d8a07ed5eea0ce3c11/FLAGc8ef570e0 [2020-08-22 02:14:17,386 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:14:17,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 02:14:17,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa6d3a7bf/7ef10909f00d49d8a07ed5eea0ce3c11/FLAGc8ef570e0 [2020-08-22 02:14:17,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa6d3a7bf/7ef10909f00d49d8a07ed5eea0ce3c11 [2020-08-22 02:14:17,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:14:17,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:14:17,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:17,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:14:17,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:14:17,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:17" (1/1) ... [2020-08-22 02:14:17,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e979d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:17, skipping insertion in model container [2020-08-22 02:14:17,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:17" (1/1) ... [2020-08-22 02:14:17,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:14:17,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:14:18,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:18,031 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:14:18,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:18,074 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:14:18,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18 WrapperNode [2020-08-22 02:14:18,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:18,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:14:18,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:14:18,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:14:18,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (1/1) ... [2020-08-22 02:14:18,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:14:18,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:14:18,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:14:18,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:14:18,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (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 02:14:18,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:14:18,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:14:18,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:14:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:14:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:14:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:14:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:14:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:14:18,621 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:14:18,621 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 02:14:18,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:18 BoogieIcfgContainer [2020-08-22 02:14:18,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:14:18,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:14:18,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:14:18,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:14:18,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:14:17" (1/3) ... [2020-08-22 02:14:18,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5254d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:18, skipping insertion in model container [2020-08-22 02:14:18,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:18" (2/3) ... [2020-08-22 02:14:18,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5254d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:18, skipping insertion in model container [2020-08-22 02:14:18,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:18" (3/3) ... [2020-08-22 02:14:18,636 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 02:14:18,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:14:18,658 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:14:18,677 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:14:18,707 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:14:18,708 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:14:18,708 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:14:18,708 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:14:18,708 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:14:18,709 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:14:18,709 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:14:18,709 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:14:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 02:14:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:18,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:18,743 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 02:14:18,744 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-22 02:14:18,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:18,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194044426] [2020-08-22 02:14:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,987 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 02:14:18,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194044426] [2020-08-22 02:14:18,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:18,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:18,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648150831] [2020-08-22 02:14:19,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,019 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 02:14:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,099 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-22 02:14:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,114 INFO L225 Difference]: With dead ends: 93 [2020-08-22 02:14:19,114 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 02:14:19,118 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 02:14:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 02:14:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-22 02:14:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 02:14:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-22 02:14:19,163 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-22 02:14:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,164 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-22 02:14:19,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-22 02:14:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:19,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,166 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 02:14:19,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:14:19,167 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-22 02:14:19,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263960783] [2020-08-22 02:14:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,252 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 02:14:19,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263960783] [2020-08-22 02:14:19,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56774186] [2020-08-22 02:14:19,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,257 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-22 02:14:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,293 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-22 02:14:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,296 INFO L225 Difference]: With dead ends: 127 [2020-08-22 02:14:19,296 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 02:14:19,298 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 02:14:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 02:14:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 02:14:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 02:14:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-22 02:14:19,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-22 02:14:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,326 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-22 02:14:19,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-22 02:14:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:19,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,329 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 02:14:19,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:14:19,330 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-22 02:14:19,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177475775] [2020-08-22 02:14:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,423 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 02:14:19,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177475775] [2020-08-22 02:14:19,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147227897] [2020-08-22 02:14:19,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,427 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-22 02:14:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,457 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-22 02:14:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,460 INFO L225 Difference]: With dead ends: 117 [2020-08-22 02:14:19,460 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 02:14:19,461 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 02:14:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 02:14:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-22 02:14:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 02:14:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-22 02:14:19,473 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-22 02:14:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,473 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-22 02:14:19,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-22 02:14:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:19,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,475 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 02:14:19,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:14:19,476 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-22 02:14:19,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908990108] [2020-08-22 02:14:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,542 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 02:14:19,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908990108] [2020-08-22 02:14:19,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863823929] [2020-08-22 02:14:19,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,548 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-22 02:14:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,582 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-22 02:14:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,585 INFO L225 Difference]: With dead ends: 148 [2020-08-22 02:14:19,585 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 02:14:19,586 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 02:14:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 02:14:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-22 02:14:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 02:14:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-22 02:14:19,601 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-22 02:14:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,602 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-22 02:14:19,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-22 02:14:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:19,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,604 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 02:14:19,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:14:19,605 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-22 02:14:19,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386040656] [2020-08-22 02:14:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386040656] [2020-08-22 02:14:19,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875831424] [2020-08-22 02:14:19,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,656 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-22 02:14:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,683 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-22 02:14:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,686 INFO L225 Difference]: With dead ends: 244 [2020-08-22 02:14:19,686 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 02:14:19,687 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 02:14:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 02:14:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-22 02:14:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-22 02:14:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-22 02:14:19,704 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-22 02:14:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,705 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-22 02:14:19,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-22 02:14:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:19,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,706 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 02:14:19,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:14:19,707 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-22 02:14:19,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185032857] [2020-08-22 02:14:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,789 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 02:14:19,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185032857] [2020-08-22 02:14:19,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164694899] [2020-08-22 02:14:19,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,794 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-22 02:14:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,827 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-22 02:14:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,830 INFO L225 Difference]: With dead ends: 219 [2020-08-22 02:14:19,830 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 02:14:19,831 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 02:14:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 02:14:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-22 02:14:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 02:14:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-22 02:14:19,846 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-22 02:14:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,847 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-22 02:14:19,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-22 02:14:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:19,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,849 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 02:14:19,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:14:19,850 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-22 02:14:19,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908731897] [2020-08-22 02:14:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,921 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 02:14:19,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908731897] [2020-08-22 02:14:19,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832454744] [2020-08-22 02:14:19,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,923 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-22 02:14:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,941 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-22 02:14:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,944 INFO L225 Difference]: With dead ends: 276 [2020-08-22 02:14:19,944 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 02:14:19,945 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 02:14:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 02:14:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-22 02:14:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 02:14:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-22 02:14:19,961 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-22 02:14:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,962 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-22 02:14:19,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-22 02:14:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:19,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:19,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:14:19,965 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-22 02:14:19,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733267687] [2020-08-22 02:14:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,005 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 02:14:20,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733267687] [2020-08-22 02:14:20,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034611638] [2020-08-22 02:14:20,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,007 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-22 02:14:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,050 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-22 02:14:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,055 INFO L225 Difference]: With dead ends: 472 [2020-08-22 02:14:20,056 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 02:14:20,057 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 02:14:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 02:14:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-22 02:14:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 02:14:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-22 02:14:20,078 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-22 02:14:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,078 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-22 02:14:20,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-22 02:14:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:14:20,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,081 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 02:14:20,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:14:20,081 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-22 02:14:20,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282552908] [2020-08-22 02:14:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,110 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 02:14:20,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282552908] [2020-08-22 02:14:20,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071483889] [2020-08-22 02:14:20,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,112 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-22 02:14:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,132 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-22 02:14:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 02:14:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,137 INFO L225 Difference]: With dead ends: 420 [2020-08-22 02:14:20,137 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 02:14:20,139 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 02:14:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 02:14:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-22 02:14:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-22 02:14:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-22 02:14:20,155 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-22 02:14:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,156 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-22 02:14:20,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-22 02:14:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:14:20,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,158 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 02:14:20,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:14:20,158 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-22 02:14:20,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597278356] [2020-08-22 02:14:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,184 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 02:14:20,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597278356] [2020-08-22 02:14:20,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619463867] [2020-08-22 02:14:20,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,187 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-22 02:14:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,209 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-22 02:14:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 02:14:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,214 INFO L225 Difference]: With dead ends: 524 [2020-08-22 02:14:20,214 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 02:14:20,215 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 02:14:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 02:14:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-22 02:14:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-22 02:14:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-22 02:14:20,229 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-22 02:14:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,230 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-22 02:14:20,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-22 02:14:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:14:20,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,233 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 02:14:20,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:14:20,233 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-22 02:14:20,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106578965] [2020-08-22 02:14:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,258 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 02:14:20,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106578965] [2020-08-22 02:14:20,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824739410] [2020-08-22 02:14:20,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,261 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-22 02:14:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,286 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-22 02:14:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 02:14:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,290 INFO L225 Difference]: With dead ends: 924 [2020-08-22 02:14:20,290 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 02:14:20,292 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 02:14:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 02:14:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-22 02:14:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-22 02:14:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-22 02:14:20,311 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-22 02:14:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,311 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-22 02:14:20,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-22 02:14:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:14:20,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,313 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 02:14:20,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:14:20,313 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,314 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-22 02:14:20,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116054996] [2020-08-22 02:14:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,338 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 02:14:20,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116054996] [2020-08-22 02:14:20,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749528570] [2020-08-22 02:14:20,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,341 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-22 02:14:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,362 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-22 02:14:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 02:14:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,365 INFO L225 Difference]: With dead ends: 816 [2020-08-22 02:14:20,366 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 02:14:20,367 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 02:14:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 02:14:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-22 02:14:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-22 02:14:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-22 02:14:20,384 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-22 02:14:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,384 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-22 02:14:20,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-22 02:14:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:14:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,386 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 02:14:20,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:14:20,387 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-22 02:14:20,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102553268] [2020-08-22 02:14:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,418 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 02:14:20,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102553268] [2020-08-22 02:14:20,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724902003] [2020-08-22 02:14:20,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,420 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-22 02:14:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,462 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-22 02:14:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 02:14:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,469 INFO L225 Difference]: With dead ends: 1004 [2020-08-22 02:14:20,469 INFO L226 Difference]: Without dead ends: 1002 [2020-08-22 02:14:20,470 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 02:14:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-22 02:14:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-22 02:14:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 02:14:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-22 02:14:20,498 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-22 02:14:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,498 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-22 02:14:20,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-22 02:14:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:14:20,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,500 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 02:14:20,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:14:20,501 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-22 02:14:20,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159886474] [2020-08-22 02:14:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,542 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 02:14:20,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159886474] [2020-08-22 02:14:20,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100721149] [2020-08-22 02:14:20,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,546 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-22 02:14:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,583 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-22 02:14:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 02:14:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,590 INFO L225 Difference]: With dead ends: 1820 [2020-08-22 02:14:20,590 INFO L226 Difference]: Without dead ends: 1066 [2020-08-22 02:14:20,594 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 02:14:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-22 02:14:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-22 02:14:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-22 02:14:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-22 02:14:20,643 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-22 02:14:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,643 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-22 02:14:20,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-22 02:14:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:14:20,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,646 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 02:14:20,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:14:20,647 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-22 02:14:20,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017834034] [2020-08-22 02:14:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,682 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 02:14:20,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017834034] [2020-08-22 02:14:20,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409261245] [2020-08-22 02:14:20,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,685 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-22 02:14:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,732 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-22 02:14:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 02:14:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,739 INFO L225 Difference]: With dead ends: 1596 [2020-08-22 02:14:20,740 INFO L226 Difference]: Without dead ends: 1082 [2020-08-22 02:14:20,741 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 02:14:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-22 02:14:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-22 02:14:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-22 02:14:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-22 02:14:20,773 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-22 02:14:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,773 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-22 02:14:20,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-22 02:14:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:14:20,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,776 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 02:14:20,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:14:20,776 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-22 02:14:20,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807394904] [2020-08-22 02:14:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,799 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 02:14:20,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807394904] [2020-08-22 02:14:20,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226947340] [2020-08-22 02:14:20,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,801 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-22 02:14:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,835 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-22 02:14:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 02:14:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,846 INFO L225 Difference]: With dead ends: 1932 [2020-08-22 02:14:20,846 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 02:14:20,848 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 02:14:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 02:14:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-22 02:14:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 02:14:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-22 02:14:20,897 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-22 02:14:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,897 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-22 02:14:20,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-22 02:14:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:14:20,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,901 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 02:14:20,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:14:20,901 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-22 02:14:20,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662823162] [2020-08-22 02:14:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,927 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 02:14:20,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662823162] [2020-08-22 02:14:20,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043055466] [2020-08-22 02:14:20,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,929 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-22 02:14:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,990 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-22 02:14:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 02:14:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:21,005 INFO L225 Difference]: With dead ends: 3596 [2020-08-22 02:14:21,005 INFO L226 Difference]: Without dead ends: 2090 [2020-08-22 02:14:21,009 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 02:14:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-22 02:14:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-22 02:14:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-22 02:14:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-22 02:14:21,096 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-22 02:14:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:21,097 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-22 02:14:21,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-22 02:14:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:14:21,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:21,102 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 02:14:21,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:14:21,102 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-22 02:14:21,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:21,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410752758] [2020-08-22 02:14:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,128 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 02:14:21,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410752758] [2020-08-22 02:14:21,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:21,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:21,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244671270] [2020-08-22 02:14:21,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:21,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:21,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:21,131 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-22 02:14:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:21,190 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-22 02:14:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:21,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 02:14:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:21,205 INFO L225 Difference]: With dead ends: 3132 [2020-08-22 02:14:21,206 INFO L226 Difference]: Without dead ends: 2122 [2020-08-22 02:14:21,210 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 02:14:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-22 02:14:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-22 02:14:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-22 02:14:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-22 02:14:21,291 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-22 02:14:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:21,292 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-22 02:14:21,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-22 02:14:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:14:21,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:21,295 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, 1, 1] [2020-08-22 02:14:21,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:14:21,295 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-22 02:14:21,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:21,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040141194] [2020-08-22 02:14:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,319 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 02:14:21,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040141194] [2020-08-22 02:14:21,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:21,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:21,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871201358] [2020-08-22 02:14:21,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:21,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:21,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:21,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:21,321 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-22 02:14:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:21,409 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-22 02:14:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:21,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 02:14:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:21,427 INFO L225 Difference]: With dead ends: 3724 [2020-08-22 02:14:21,427 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 02:14:21,428 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 02:14:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 02:14:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-22 02:14:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-22 02:14:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-22 02:14:21,510 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-22 02:14:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:21,510 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-22 02:14:21,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-22 02:14:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:14:21,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:21,516 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 02:14:21,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 02:14:21,516 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-22 02:14:21,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:21,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549321008] [2020-08-22 02:14:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,541 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 02:14:21,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549321008] [2020-08-22 02:14:21,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:21,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:21,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916597956] [2020-08-22 02:14:21,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:21,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:21,544 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-22 02:14:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:21,620 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-22 02:14:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:21,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 02:14:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:21,639 INFO L225 Difference]: With dead ends: 7116 [2020-08-22 02:14:21,640 INFO L226 Difference]: Without dead ends: 4106 [2020-08-22 02:14:21,647 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 02:14:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-22 02:14:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-22 02:14:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-22 02:14:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-22 02:14:21,773 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-22 02:14:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:21,773 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-22 02:14:21,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-22 02:14:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:14:21,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:21,779 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 02:14:21,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 02:14:21,780 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-22 02:14:21,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:21,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24806244] [2020-08-22 02:14:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,801 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 02:14:21,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24806244] [2020-08-22 02:14:21,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:21,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:21,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998633214] [2020-08-22 02:14:21,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:21,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:21,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:21,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:21,803 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-22 02:14:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:21,868 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-22 02:14:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:21,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 02:14:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:21,889 INFO L225 Difference]: With dead ends: 6156 [2020-08-22 02:14:21,889 INFO L226 Difference]: Without dead ends: 4170 [2020-08-22 02:14:21,922 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 02:14:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-22 02:14:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-22 02:14:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-22 02:14:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-22 02:14:22,080 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-22 02:14:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:22,080 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-22 02:14:22,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-22 02:14:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:14:22,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:22,088 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 02:14:22,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 02:14:22,088 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-22 02:14:22,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:22,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694622524] [2020-08-22 02:14:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:22,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:22,120 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 02:14:22,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694622524] [2020-08-22 02:14:22,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:22,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:22,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324214704] [2020-08-22 02:14:22,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:22,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:22,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:22,123 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-22 02:14:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:22,244 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-22 02:14:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:22,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 02:14:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:22,280 INFO L225 Difference]: With dead ends: 12108 [2020-08-22 02:14:22,280 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 02:14:22,292 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 02:14:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 02:14:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-22 02:14:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 02:14:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-22 02:14:22,544 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-22 02:14:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:22,544 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-22 02:14:22,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-22 02:14:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:14:22,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:22,559 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 02:14:22,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 02:14:22,559 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-22 02:14:22,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:22,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603187399] [2020-08-22 02:14:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:22,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:22,640 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 02:14:22,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603187399] [2020-08-22 02:14:22,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:22,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:22,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128427063] [2020-08-22 02:14:22,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:22,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:22,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:22,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:22,643 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-22 02:14:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:22,843 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-22 02:14:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:22,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 02:14:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:22,864 INFO L225 Difference]: With dead ends: 9100 [2020-08-22 02:14:22,864 INFO L226 Difference]: Without dead ends: 9098 [2020-08-22 02:14:22,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-22 02:14:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-22 02:14:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 02:14:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-22 02:14:23,069 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-22 02:14:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:23,069 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-22 02:14:23,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-22 02:14:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 02:14:23,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:23,080 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 02:14:23,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 02:14:23,081 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-22 02:14:23,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:23,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245280517] [2020-08-22 02:14:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:23,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:23,109 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 02:14:23,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245280517] [2020-08-22 02:14:23,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:23,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:23,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642096944] [2020-08-22 02:14:23,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:23,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:23,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:23,112 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-22 02:14:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:23,257 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-22 02:14:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:23,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 02:14:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:23,284 INFO L225 Difference]: With dead ends: 13708 [2020-08-22 02:14:23,284 INFO L226 Difference]: Without dead ends: 13706 [2020-08-22 02:14:23,291 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 02:14:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-22 02:14:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-22 02:14:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-22 02:14:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-22 02:14:23,594 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-22 02:14:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:23,594 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-22 02:14:23,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-22 02:14:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 02:14:23,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:23,613 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 02:14:23,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 02:14:23,614 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-22 02:14:23,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:23,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044346664] [2020-08-22 02:14:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:23,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:23,635 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 02:14:23,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044346664] [2020-08-22 02:14:23,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:23,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:23,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974196638] [2020-08-22 02:14:23,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:23,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:23,637 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-22 02:14:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:23,814 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-22 02:14:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:23,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 02:14:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:23,843 INFO L225 Difference]: With dead ends: 27788 [2020-08-22 02:14:23,844 INFO L226 Difference]: Without dead ends: 15754 [2020-08-22 02:14:23,868 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 02:14:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-22 02:14:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-22 02:14:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-22 02:14:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-22 02:14:24,296 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-22 02:14:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,296 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-22 02:14:24,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-22 02:14:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:14:24,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,318 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 02:14:24,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 02:14:24,319 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-22 02:14:24,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180453919] [2020-08-22 02:14:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,343 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 02:14:24,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180453919] [2020-08-22 02:14:24,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330699206] [2020-08-22 02:14:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,350 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-22 02:14:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,519 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-22 02:14:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 02:14:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,550 INFO L225 Difference]: With dead ends: 23820 [2020-08-22 02:14:24,550 INFO L226 Difference]: Without dead ends: 16138 [2020-08-22 02:14:24,568 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 02:14:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-22 02:14:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-22 02:14:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-22 02:14:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-22 02:14:25,317 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-22 02:14:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,317 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-22 02:14:25,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-22 02:14:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:14:25,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,338 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 02:14:25,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 02:14:25,338 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-22 02:14:25,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650706417] [2020-08-22 02:14:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650706417] [2020-08-22 02:14:25,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906260234] [2020-08-22 02:14:25,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,365 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-22 02:14:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,634 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-22 02:14:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 02:14:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,686 INFO L225 Difference]: With dead ends: 26636 [2020-08-22 02:14:25,686 INFO L226 Difference]: Without dead ends: 26634 [2020-08-22 02:14:25,700 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 02:14:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-22 02:14:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-22 02:14:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-22 02:14:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-22 02:14:26,337 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-22 02:14:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:26,338 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-22 02:14:26,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-22 02:14:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:14:26,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:26,380 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 02:14:26,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 02:14:26,380 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-22 02:14:26,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:26,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471554667] [2020-08-22 02:14:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:26,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:26,400 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 02:14:26,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471554667] [2020-08-22 02:14:26,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:26,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:26,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901247358] [2020-08-22 02:14:26,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:26,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:26,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:26,402 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-22 02:14:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:26,903 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-22 02:14:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:26,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 02:14:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:26,973 INFO L225 Difference]: With dead ends: 55308 [2020-08-22 02:14:26,974 INFO L226 Difference]: Without dead ends: 31242 [2020-08-22 02:14:27,011 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 02:14:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-22 02:14:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-22 02:14:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-22 02:14:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-22 02:14:27,524 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-22 02:14:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:27,524 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-22 02:14:27,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-22 02:14:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:14:27,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:27,558 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 02:14:27,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 02:14:27,558 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-22 02:14:27,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:27,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904527579] [2020-08-22 02:14:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:27,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:27,585 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 02:14:27,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904527579] [2020-08-22 02:14:27,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:27,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:27,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616461582] [2020-08-22 02:14:27,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:27,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:27,587 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-22 02:14:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:28,101 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-22 02:14:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:28,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 02:14:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:28,151 INFO L225 Difference]: With dead ends: 46860 [2020-08-22 02:14:28,151 INFO L226 Difference]: Without dead ends: 31754 [2020-08-22 02:14:28,177 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 02:14:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-22 02:14:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-22 02:14:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-22 02:14:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-22 02:14:28,686 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-22 02:14:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:28,687 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-22 02:14:28,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-22 02:14:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:14:28,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:28,708 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 02:14:28,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 02:14:28,708 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-22 02:14:28,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:28,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621437207] [2020-08-22 02:14:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:28,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:28,729 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 02:14:28,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621437207] [2020-08-22 02:14:28,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:28,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:28,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469162610] [2020-08-22 02:14:28,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:28,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:28,731 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-22 02:14:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:29,720 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-22 02:14:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:29,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 02:14:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:29,761 INFO L225 Difference]: With dead ends: 51210 [2020-08-22 02:14:29,761 INFO L226 Difference]: Without dead ends: 51208 [2020-08-22 02:14:29,769 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 02:14:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-22 02:14:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-22 02:14:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-22 02:14:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-22 02:14:30,518 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-22 02:14:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:30,518 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-22 02:14:30,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-22 02:14:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:14:30,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:30,555 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 02:14:30,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 02:14:30,556 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-22 02:14:30,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:30,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232453747] [2020-08-22 02:14:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:30,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:30,580 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 02:14:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232453747] [2020-08-22 02:14:30,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:30,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:30,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680221543] [2020-08-22 02:14:30,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:30,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:30,582 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-22 02:14:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:31,325 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-22 02:14:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:31,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 02:14:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:31,326 INFO L225 Difference]: With dead ends: 109576 [2020-08-22 02:14:31,326 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 02:14:31,425 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 02:14:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 02:14:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 02:14:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 02:14:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 02:14:31,426 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-22 02:14:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:31,426 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 02:14:31,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 02:14:31,426 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 02:14:31,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 02:14:31,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 02:14:31,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 02:14:31,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:14:31,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:14:31,465 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 02:14:31,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 02:14:31,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 02:14:31,465 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,466 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,467 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-22 02:14:31,468 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,468 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-22 02:14:31,468 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,468 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,468 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-22 02:14:31,469 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,469 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-22 02:14:31,469 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,469 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,469 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-22 02:14:31,469 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-22 02:14:31,469 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,470 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 02:14:31,471 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-22 02:14:31,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:14:31 BoogieIcfgContainer [2020-08-22 02:14:31,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:14:31,497 INFO L168 Benchmark]: Toolchain (without parser) took 13719.85 ms. Allocated memory was 144.7 MB in the beginning and 973.6 MB in the end (delta: 828.9 MB). Free memory was 101.2 MB in the beginning and 358.5 MB in the end (delta: -257.2 MB). Peak memory consumption was 571.7 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:31,503 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 144.7 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 02:14:31,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.74 ms. Allocated memory is still 144.7 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:31,505 INFO L168 Benchmark]: Boogie Preprocessor took 129.33 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 90.1 MB in the beginning and 179.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:31,513 INFO L168 Benchmark]: RCFGBuilder took 420.28 ms. Allocated memory is still 200.8 MB. Free memory was 178.6 MB in the beginning and 157.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:31,513 INFO L168 Benchmark]: TraceAbstraction took 12866.41 ms. Allocated memory was 200.8 MB in the beginning and 973.6 MB in the end (delta: 772.8 MB). Free memory was 157.0 MB in the beginning and 358.5 MB in the end (delta: -201.4 MB). Peak memory consumption was 571.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:31,515 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 144.7 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.74 ms. Allocated memory is still 144.7 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.33 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 90.1 MB in the beginning and 179.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 420.28 ms. Allocated memory is still 200.8 MB. Free memory was 178.6 MB in the beginning and 157.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12866.41 ms. Allocated memory was 200.8 MB in the beginning and 973.6 MB in the end (delta: 772.8 MB). Free memory was 157.0 MB in the beginning and 358.5 MB in the end (delta: -201.4 MB). Peak memory consumption was 571.4 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: 12.7s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.6s, 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: 5.2s 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...