/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:59:41,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:59:41,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:59:41,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:59:41,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:59:41,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:59:41,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:59:41,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:59:41,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:59:41,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:59:41,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:59:41,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:59:41,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:59:41,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:59:41,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:59:41,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:59:41,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:59:41,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:59:41,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:59:41,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:59:41,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:59:41,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:59:41,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:59:41,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:59:41,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:59:41,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:59:41,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:59:41,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:59:41,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:59:41,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:59:41,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:59:41,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:59:41,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:59:41,255 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:59:41,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:59:41,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:59:41,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:59:41,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:59:41,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:59:41,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:59:41,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:59:41,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:59:41,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:59:41,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:59:41,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:59:41,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:59:41,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:59:41,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:59:41,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:59:41,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:59:41,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:41,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:59:41,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:59:41,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:59:41,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:59:41,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:59:41,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:59:41,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:59:41,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:59:41,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:59:41,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:59:41,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:59:41,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:59:41,609 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:59:41,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 22:59:41,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/743687e9a/cc48d476f82c4d49b293819917957f85/FLAG0b1741459 [2020-08-21 22:59:42,148 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:59:42,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 22:59:42,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/743687e9a/cc48d476f82c4d49b293819917957f85/FLAG0b1741459 [2020-08-21 22:59:42,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/743687e9a/cc48d476f82c4d49b293819917957f85 [2020-08-21 22:59:42,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:59:42,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:59:42,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:42,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:59:42,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:59:42,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:42,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bf58bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42, skipping insertion in model container [2020-08-21 22:59:42,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:42,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:59:42,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:59:42,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:42,853 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:59:42,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:42,921 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:59:42,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42 WrapperNode [2020-08-21 22:59:42,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:42,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:59:42,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:59:42,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:59:43,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... [2020-08-21 22:59:43,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:59:43,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:59:43,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:59:43,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:59:43,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:43,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:59:43,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:59:43,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:59:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:59:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:59:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:59:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:59:43,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:59:43,385 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:59:43,386 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:59:43,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:43 BoogieIcfgContainer [2020-08-21 22:59:43,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:59:43,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:59:43,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:59:43,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:59:43,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:59:42" (1/3) ... [2020-08-21 22:59:43,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101105b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:43, skipping insertion in model container [2020-08-21 22:59:43,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:42" (2/3) ... [2020-08-21 22:59:43,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101105b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:43, skipping insertion in model container [2020-08-21 22:59:43,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:43" (3/3) ... [2020-08-21 22:59:43,399 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-21 22:59:43,412 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:59:43,420 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:59:43,439 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:59:43,489 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:59:43,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:59:43,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:59:43,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:59:43,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:59:43,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:59:43,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:59:43,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:59:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 22:59:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 22:59:43,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,539 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-21 22:59:43,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808515247] [2020-08-21 22:59:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808515247] [2020-08-21 22:59:43,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834404788] [2020-08-21 22:59:43,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,792 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 22:59:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,860 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-21 22:59:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 22:59:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,875 INFO L225 Difference]: With dead ends: 75 [2020-08-21 22:59:43,875 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 22:59:43,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 22:59:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-21 22:59:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 22:59:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-21 22:59:43,922 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-21 22:59:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,923 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-21 22:59:43,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-21 22:59:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 22:59:43,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:59:43,926 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-21 22:59:43,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494392304] [2020-08-21 22:59:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494392304] [2020-08-21 22:59:44,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672593110] [2020-08-21 22:59:44,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,027 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-21 22:59:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,084 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-21 22:59:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 22:59:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,087 INFO L225 Difference]: With dead ends: 97 [2020-08-21 22:59:44,087 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 22:59:44,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 22:59:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-21 22:59:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 22:59:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-21 22:59:44,100 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-21 22:59:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,100 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-21 22:59:44,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-21 22:59:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:44,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:59:44,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-21 22:59:44,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133707776] [2020-08-21 22:59:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133707776] [2020-08-21 22:59:44,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205263561] [2020-08-21 22:59:44,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,157 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-21 22:59:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,193 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-21 22:59:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,197 INFO L225 Difference]: With dead ends: 90 [2020-08-21 22:59:44,197 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 22:59:44,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 22:59:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 22:59:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 22:59:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-21 22:59:44,211 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-21 22:59:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,211 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-21 22:59:44,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-21 22:59:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:44,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:59:44,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-21 22:59:44,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635504005] [2020-08-21 22:59:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635504005] [2020-08-21 22:59:44,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148287462] [2020-08-21 22:59:44,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,274 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-21 22:59:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,297 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-21 22:59:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,300 INFO L225 Difference]: With dead ends: 112 [2020-08-21 22:59:44,300 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 22:59:44,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 22:59:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-21 22:59:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 22:59:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-21 22:59:44,315 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-21 22:59:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,315 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-21 22:59:44,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-21 22:59:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:44,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:59:44,317 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-21 22:59:44,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921348512] [2020-08-21 22:59:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921348512] [2020-08-21 22:59:44,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208808408] [2020-08-21 22:59:44,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,359 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-21 22:59:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,380 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-21 22:59:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,383 INFO L225 Difference]: With dead ends: 184 [2020-08-21 22:59:44,383 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 22:59:44,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 22:59:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-21 22:59:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 22:59:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-21 22:59:44,397 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-21 22:59:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,398 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-21 22:59:44,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-21 22:59:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:44,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:59:44,400 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-21 22:59:44,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034240741] [2020-08-21 22:59:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034240741] [2020-08-21 22:59:44,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449044688] [2020-08-21 22:59:44,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,452 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-21 22:59:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,504 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-21 22:59:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,507 INFO L225 Difference]: With dead ends: 165 [2020-08-21 22:59:44,507 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 22:59:44,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 22:59:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-21 22:59:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 22:59:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-21 22:59:44,533 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-21 22:59:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,533 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-21 22:59:44,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-21 22:59:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:44,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:59:44,536 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-21 22:59:44,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765090345] [2020-08-21 22:59:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765090345] [2020-08-21 22:59:44,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455944382] [2020-08-21 22:59:44,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,630 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-21 22:59:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,659 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-21 22:59:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,662 INFO L225 Difference]: With dead ends: 204 [2020-08-21 22:59:44,663 INFO L226 Difference]: Without dead ends: 202 [2020-08-21 22:59:44,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-21 22:59:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-21 22:59:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 22:59:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-21 22:59:44,710 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-21 22:59:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,710 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-21 22:59:44,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-21 22:59:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:44,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:59:44,713 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-21 22:59:44,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058850446] [2020-08-21 22:59:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058850446] [2020-08-21 22:59:44,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913135261] [2020-08-21 22:59:44,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,749 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-21 22:59:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,769 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-21 22:59:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,771 INFO L225 Difference]: With dead ends: 352 [2020-08-21 22:59:44,771 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 22:59:44,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 22:59:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-21 22:59:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 22:59:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-21 22:59:44,793 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-21 22:59:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,794 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-21 22:59:44,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-21 22:59:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:44,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:59:44,796 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-21 22:59:44,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761825581] [2020-08-21 22:59:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761825581] [2020-08-21 22:59:44,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454736990] [2020-08-21 22:59:44,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,828 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-21 22:59:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,846 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 22:59:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,849 INFO L225 Difference]: With dead ends: 312 [2020-08-21 22:59:44,849 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 22:59:44,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 22:59:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-21 22:59:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-21 22:59:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-21 22:59:44,861 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-21 22:59:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,862 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-21 22:59:44,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-21 22:59:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:44,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:59:44,864 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-21 22:59:44,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476524383] [2020-08-21 22:59:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476524383] [2020-08-21 22:59:44,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903352733] [2020-08-21 22:59:44,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,904 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-21 22:59:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,928 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-21 22:59:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,932 INFO L225 Difference]: With dead ends: 380 [2020-08-21 22:59:44,932 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 22:59:44,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 22:59:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-21 22:59:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 22:59:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-21 22:59:44,946 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-21 22:59:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,947 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-21 22:59:44,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-21 22:59:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:44,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:59:44,949 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-21 22:59:44,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394956776] [2020-08-21 22:59:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394956776] [2020-08-21 22:59:44,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640371298] [2020-08-21 22:59:44,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,995 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-21 22:59:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,047 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-21 22:59:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,052 INFO L225 Difference]: With dead ends: 684 [2020-08-21 22:59:45,053 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 22:59:45,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 22:59:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-21 22:59:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-21 22:59:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-21 22:59:45,072 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-21 22:59:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,072 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-21 22:59:45,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-21 22:59:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:45,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:59:45,075 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-21 22:59:45,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527428080] [2020-08-21 22:59:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527428080] [2020-08-21 22:59:45,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100151420] [2020-08-21 22:59:45,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,105 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-21 22:59:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,140 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-21 22:59:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,143 INFO L225 Difference]: With dead ends: 600 [2020-08-21 22:59:45,144 INFO L226 Difference]: Without dead ends: 410 [2020-08-21 22:59:45,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-21 22:59:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-21 22:59:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-21 22:59:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-21 22:59:45,165 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-21 22:59:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,166 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-21 22:59:45,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-21 22:59:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:45,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:59:45,171 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-21 22:59:45,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868956729] [2020-08-21 22:59:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868956729] [2020-08-21 22:59:45,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154934994] [2020-08-21 22:59:45,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,219 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-21 22:59:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,245 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-21 22:59:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,251 INFO L225 Difference]: With dead ends: 716 [2020-08-21 22:59:45,251 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 22:59:45,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 22:59:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-21 22:59:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 22:59:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-21 22:59:45,273 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-21 22:59:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,274 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-21 22:59:45,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-21 22:59:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:45,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:59:45,276 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-21 22:59:45,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303547448] [2020-08-21 22:59:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303547448] [2020-08-21 22:59:45,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377979164] [2020-08-21 22:59:45,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,321 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-21 22:59:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,357 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-21 22:59:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,362 INFO L225 Difference]: With dead ends: 1340 [2020-08-21 22:59:45,362 INFO L226 Difference]: Without dead ends: 778 [2020-08-21 22:59:45,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-21 22:59:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-21 22:59:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 22:59:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-21 22:59:45,391 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-21 22:59:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,391 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-21 22:59:45,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-21 22:59:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:45,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:59:45,394 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-21 22:59:45,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540024435] [2020-08-21 22:59:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540024435] [2020-08-21 22:59:45,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099481312] [2020-08-21 22:59:45,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,440 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-21 22:59:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,472 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-21 22:59:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,479 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 22:59:45,479 INFO L226 Difference]: Without dead ends: 794 [2020-08-21 22:59:45,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-21 22:59:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-21 22:59:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 22:59:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-21 22:59:45,514 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-21 22:59:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,514 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-21 22:59:45,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-21 22:59:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:45,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:59:45,517 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-21 22:59:45,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816998988] [2020-08-21 22:59:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816998988] [2020-08-21 22:59:45,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648559347] [2020-08-21 22:59:45,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,573 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-21 22:59:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,623 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-21 22:59:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,632 INFO L225 Difference]: With dead ends: 1356 [2020-08-21 22:59:45,632 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 22:59:45,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 22:59:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-21 22:59:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-21 22:59:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-21 22:59:45,705 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-21 22:59:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,706 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-21 22:59:45,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-21 22:59:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:45,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:59:45,710 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-21 22:59:45,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44340367] [2020-08-21 22:59:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44340367] [2020-08-21 22:59:45,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656012230] [2020-08-21 22:59:45,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,753 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-21 22:59:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,810 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-21 22:59:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,820 INFO L225 Difference]: With dead ends: 2636 [2020-08-21 22:59:45,820 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 22:59:45,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 22:59:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-21 22:59:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-21 22:59:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-21 22:59:45,877 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-21 22:59:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,878 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-21 22:59:45,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-21 22:59:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:45,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:59:45,882 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-21 22:59:45,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972622746] [2020-08-21 22:59:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972622746] [2020-08-21 22:59:45,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100190102] [2020-08-21 22:59:45,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,919 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-21 22:59:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,960 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-21 22:59:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,968 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 22:59:45,969 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 22:59:45,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 22:59:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-21 22:59:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 22:59:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-21 22:59:46,022 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-21 22:59:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,022 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-21 22:59:46,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-21 22:59:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:46,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:59:46,026 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-21 22:59:46,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677096030] [2020-08-21 22:59:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677096030] [2020-08-21 22:59:46,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331878069] [2020-08-21 22:59:46,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,062 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-21 22:59:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,122 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-21 22:59:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,134 INFO L225 Difference]: With dead ends: 2572 [2020-08-21 22:59:46,135 INFO L226 Difference]: Without dead ends: 2570 [2020-08-21 22:59:46,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-21 22:59:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-21 22:59:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-21 22:59:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-21 22:59:46,209 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-21 22:59:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,209 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-21 22:59:46,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-21 22:59:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:46,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:59:46,215 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-21 22:59:46,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153541866] [2020-08-21 22:59:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153541866] [2020-08-21 22:59:46,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875403752] [2020-08-21 22:59:46,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,244 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-21 22:59:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,343 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-21 22:59:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,359 INFO L225 Difference]: With dead ends: 5196 [2020-08-21 22:59:46,360 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 22:59:46,367 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 [2020-08-21 22:59:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 22:59:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-21 22:59:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-21 22:59:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-21 22:59:46,502 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-21 22:59:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,503 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-21 22:59:46,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-21 22:59:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:46,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:59:46,515 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,516 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-21 22:59:46,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123728155] [2020-08-21 22:59:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123728155] [2020-08-21 22:59:46,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412666801] [2020-08-21 22:59:46,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,553 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-21 22:59:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,645 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-21 22:59:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,660 INFO L225 Difference]: With dead ends: 4428 [2020-08-21 22:59:46,661 INFO L226 Difference]: Without dead ends: 3018 [2020-08-21 22:59:46,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-21 22:59:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-21 22:59:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 22:59:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-21 22:59:46,811 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-21 22:59:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,812 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-21 22:59:46,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-21 22:59:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:46,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:59:46,820 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-21 22:59:46,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786520428] [2020-08-21 22:59:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786520428] [2020-08-21 22:59:46,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965107281] [2020-08-21 22:59:46,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,862 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-21 22:59:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:47,055 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-21 22:59:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:47,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:47,073 INFO L225 Difference]: With dead ends: 8650 [2020-08-21 22:59:47,074 INFO L226 Difference]: Without dead ends: 3016 [2020-08-21 22:59:47,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-21 22:59:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-21 22:59:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 22:59:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-21 22:59:47,216 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-21 22:59:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:47,217 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-21 22:59:47,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-21 22:59:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:47,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:47,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:47,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:59:47,229 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-21 22:59:47,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:47,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294792763] [2020-08-21 22:59:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:47,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294792763] [2020-08-21 22:59:47,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:47,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:47,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574721408] [2020-08-21 22:59:47,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:47,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,258 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-21 22:59:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:47,311 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-21 22:59:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:47,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:47,313 INFO L225 Difference]: With dead ends: 3016 [2020-08-21 22:59:47,313 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:59:47,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:59:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:59:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:59:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:59:47,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 22:59:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:47,319 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:59:47,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:59:47,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:59:47,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:59:47,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:59:47,344 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:59:47,344 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:47,344 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:47,345 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:59:47,345 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:59:47,345 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:47,345 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-21 22:59:47,345 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-21 22:59:47,345 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,345 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-21 22:59:47,345 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-21 22:59:47,346 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-21 22:59:47,346 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-21 22:59:47,347 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-21 22:59:47,347 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,348 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,348 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-21 22:59:47,349 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 22:59:47,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:59:47 BoogieIcfgContainer [2020-08-21 22:59:47,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:59:47,367 INFO L168 Benchmark]: Toolchain (without parser) took 4820.99 ms. Allocated memory was 139.5 MB in the beginning and 298.3 MB in the end (delta: 158.9 MB). Free memory was 102.4 MB in the beginning and 196.8 MB in the end (delta: -94.4 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:47,367 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:59:47,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.91 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 91.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:47,368 INFO L168 Benchmark]: Boogie Preprocessor took 121.01 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 91.7 MB in the beginning and 178.7 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:47,369 INFO L168 Benchmark]: RCFGBuilder took 346.65 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 161.3 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:47,370 INFO L168 Benchmark]: TraceAbstraction took 3972.12 ms. Allocated memory was 201.3 MB in the beginning and 298.3 MB in the end (delta: 97.0 MB). Free memory was 160.6 MB in the beginning and 196.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:47,377 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 375.91 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 91.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.01 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 91.7 MB in the beginning and 178.7 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.65 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 161.3 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3972.12 ms. Allocated memory was 201.3 MB in the beginning and 298.3 MB in the end (delta: 97.0 MB). Free memory was 160.6 MB in the beginning and 196.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...