/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=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:48:09,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:48:09,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:48:09,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:48:09,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:48:09,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:48:09,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:48:09,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:48:09,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:48:09,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:48:09,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:48:09,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:48:09,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:48:09,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:48:09,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:48:09,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:48:09,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:48:09,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:48:09,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:48:09,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:48:09,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:48:09,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:48:09,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:48:09,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:48:09,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:48:09,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:48:09,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:48:09,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:48:09,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:48:09,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 23:48:09,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:48:09,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:48:09,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:48:09,872 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 23:48:09,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:48:09,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:48:09,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:48:09,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:48:09,920 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:48:09,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:48:09,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:48:09,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:48:09,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:48:09,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:48:09,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:48:09,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:48:09,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:48:09,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:48:09,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:48:09,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:48:09,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:48:09,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:48:09,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:48:09,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:48:09,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:48:09,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:48:09,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:48:09,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:48:09,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:48:09,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:48:09,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:48:09,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:48:09,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:48:09,926 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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-08-21 23:48:10,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:48:10,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:48:10,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:48:10,232 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:48:10,232 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:48:10,233 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 23:48:10,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e904b2e/bda1206003aa4880bd17c778bcb6ed81/FLAG2a71ae1fb [2020-08-21 23:48:10,712 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:48:10,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 23:48:10,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e904b2e/bda1206003aa4880bd17c778bcb6ed81/FLAG2a71ae1fb [2020-08-21 23:48:11,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e904b2e/bda1206003aa4880bd17c778bcb6ed81 [2020-08-21 23:48:11,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:48:11,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:48:11,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:11,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:48:11,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:48:11,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1c8c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11, skipping insertion in model container [2020-08-21 23:48:11,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:48:11,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:48:11,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:11,347 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:48:11,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:11,441 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:48:11,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11 WrapperNode [2020-08-21 23:48:11,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:11,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:48:11,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:48:11,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:48:11,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:48:11,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:48:11,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:48:11,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:48:11,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (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 23:48:11,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:48:11,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:48:11,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:48:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:48:11,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:48:11,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:48:11,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:48:11,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:48:12,077 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:48:12,078 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:48:12,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:12 BoogieIcfgContainer [2020-08-21 23:48:12,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:48:12,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:48:12,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:48:12,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:48:12,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:48:11" (1/3) ... [2020-08-21 23:48:12,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46328338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:12, skipping insertion in model container [2020-08-21 23:48:12,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11" (2/3) ... [2020-08-21 23:48:12,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46328338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:12, skipping insertion in model container [2020-08-21 23:48:12,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:12" (3/3) ... [2020-08-21 23:48:12,098 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 23:48:12,110 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:48:12,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:48:12,172 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:48:12,228 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:48:12,228 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:48:12,229 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:48:12,229 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:48:12,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:48:12,229 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:48:12,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:48:12,229 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:48:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 23:48:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:48:12,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:12,262 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 23:48:12,263 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 23:48:12,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:12,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494915597] [2020-08-21 23:48:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,472 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 23:48:12,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494915597] [2020-08-21 23:48:12,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:12,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:12,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507106779] [2020-08-21 23:48:12,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:12,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:12,501 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 23:48:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:12,564 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 23:48:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:12,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 23:48:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:12,579 INFO L225 Difference]: With dead ends: 81 [2020-08-21 23:48:12,579 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 23:48:12,583 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 23:48:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 23:48:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 23:48:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 23:48:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 23:48:12,633 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 23:48:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:12,634 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 23:48:12,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 23:48:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:48:12,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:12,637 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 23:48:12,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:48:12,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 23:48:12,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:12,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44614039] [2020-08-21 23:48:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,719 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 23:48:12,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44614039] [2020-08-21 23:48:12,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:12,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:12,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027044042] [2020-08-21 23:48:12,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:12,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:12,723 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 23:48:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:12,758 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 23:48:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:12,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 23:48:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:12,761 INFO L225 Difference]: With dead ends: 107 [2020-08-21 23:48:12,761 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 23:48:12,762 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 23:48:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 23:48:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 23:48:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 23:48:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 23:48:12,773 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 23:48:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:12,774 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 23:48:12,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 23:48:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 23:48:12,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:12,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:12,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:48:12,776 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 23:48:12,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:12,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927535559] [2020-08-21 23:48:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,837 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 23:48:12,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927535559] [2020-08-21 23:48:12,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:12,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:12,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574610146] [2020-08-21 23:48:12,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:12,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:12,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:12,841 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 23:48:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:12,865 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 23:48:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:12,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 23:48:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:12,867 INFO L225 Difference]: With dead ends: 99 [2020-08-21 23:48:12,867 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 23:48:12,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 23:48:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 23:48:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 23:48:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 23:48:12,879 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 23:48:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:12,880 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 23:48:12,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 23:48:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 23:48:12,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:12,882 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 23:48:12,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:48:12,882 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 23:48:12,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:12,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518406073] [2020-08-21 23:48:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:48:12,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518406073] [2020-08-21 23:48:12,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:12,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:12,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100177534] [2020-08-21 23:48:12,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:12,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:12,967 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 23:48:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:12,990 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 23:48:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:12,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 23:48:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:12,993 INFO L225 Difference]: With dead ends: 124 [2020-08-21 23:48:12,993 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 23:48:12,994 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 23:48:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 23:48:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 23:48:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 23:48:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 23:48:13,007 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 23:48:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,008 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 23:48:13,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 23:48:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 23:48:13,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,010 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 23:48:13,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:48:13,010 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 23:48:13,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451537875] [2020-08-21 23:48:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,067 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 23:48:13,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451537875] [2020-08-21 23:48:13,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494746739] [2020-08-21 23:48:13,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,070 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 23:48:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,097 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 23:48:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 23:48:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,099 INFO L225 Difference]: With dead ends: 204 [2020-08-21 23:48:13,100 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 23:48:13,101 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 23:48:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 23:48:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 23:48:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 23:48:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 23:48:13,115 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 23:48:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,116 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 23:48:13,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 23:48:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:48:13,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,118 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 23:48:13,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:48:13,119 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 23:48:13,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304793113] [2020-08-21 23:48:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,169 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 23:48:13,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304793113] [2020-08-21 23:48:13,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359233923] [2020-08-21 23:48:13,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,176 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 23:48:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,230 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 23:48:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 23:48:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,233 INFO L225 Difference]: With dead ends: 183 [2020-08-21 23:48:13,233 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 23:48:13,234 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 23:48:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 23:48:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 23:48:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 23:48:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 23:48:13,248 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 23:48:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,248 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 23:48:13,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 23:48:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:48:13,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,251 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 23:48:13,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:48:13,251 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 23:48:13,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591992856] [2020-08-21 23:48:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,331 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 23:48:13,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591992856] [2020-08-21 23:48:13,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803841081] [2020-08-21 23:48:13,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,334 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 23:48:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,359 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 23:48:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 23:48:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,361 INFO L225 Difference]: With dead ends: 228 [2020-08-21 23:48:13,362 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 23:48:13,362 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 23:48:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 23:48:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 23:48:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 23:48:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 23:48:13,387 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 23:48:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,388 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 23:48:13,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 23:48:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:48:13,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:13,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:48:13,390 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 23:48:13,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722686851] [2020-08-21 23:48:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:48:13,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722686851] [2020-08-21 23:48:13,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174253359] [2020-08-21 23:48:13,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,420 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 23:48:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,469 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 23:48:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 23:48:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,472 INFO L225 Difference]: With dead ends: 392 [2020-08-21 23:48:13,472 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 23:48:13,474 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 23:48:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 23:48:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 23:48:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 23:48:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 23:48:13,489 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 23:48:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,490 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 23:48:13,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 23:48:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 23:48:13,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,492 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 23:48:13,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:48:13,492 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 23:48:13,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393668387] [2020-08-21 23:48:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,524 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 23:48:13,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393668387] [2020-08-21 23:48:13,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558198587] [2020-08-21 23:48:13,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,526 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 23:48:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,555 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 23:48:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 23:48:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,559 INFO L225 Difference]: With dead ends: 348 [2020-08-21 23:48:13,559 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 23:48:13,560 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 23:48:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 23:48:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 23:48:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 23:48:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 23:48:13,581 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 23:48:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,581 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 23:48:13,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 23:48:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 23:48:13,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,588 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 23:48:13,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:48:13,590 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 23:48:13,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132871766] [2020-08-21 23:48:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,638 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 23:48:13,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132871766] [2020-08-21 23:48:13,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274805011] [2020-08-21 23:48:13,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,641 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 23:48:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,661 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 23:48:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 23:48:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,664 INFO L225 Difference]: With dead ends: 428 [2020-08-21 23:48:13,664 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 23:48:13,665 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 23:48:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 23:48:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 23:48:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 23:48:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 23:48:13,679 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 23:48:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,679 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 23:48:13,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 23:48:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 23:48:13,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,681 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 23:48:13,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:48:13,682 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 23:48:13,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132648113] [2020-08-21 23:48:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:48:13,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132648113] [2020-08-21 23:48:13,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327649244] [2020-08-21 23:48:13,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,712 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 23:48:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,735 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 23:48:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 23:48:13,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,739 INFO L225 Difference]: With dead ends: 764 [2020-08-21 23:48:13,739 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 23:48:13,740 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 23:48:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 23:48:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 23:48:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 23:48:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 23:48:13,757 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 23:48:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,758 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 23:48:13,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 23:48:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 23:48:13,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,759 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 23:48:13,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:48:13,760 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 23:48:13,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504837297] [2020-08-21 23:48:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,790 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 23:48:13,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504837297] [2020-08-21 23:48:13,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573632107] [2020-08-21 23:48:13,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,793 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 23:48:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,813 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 23:48:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 23:48:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,816 INFO L225 Difference]: With dead ends: 672 [2020-08-21 23:48:13,816 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 23:48:13,817 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 23:48:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 23:48:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 23:48:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 23:48:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 23:48:13,835 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 23:48:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,835 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 23:48:13,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 23:48:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 23:48:13,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,837 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 23:48:13,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:48:13,837 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 23:48:13,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850700586] [2020-08-21 23:48:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,865 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 23:48:13,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850700586] [2020-08-21 23:48:13,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489339260] [2020-08-21 23:48:13,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,867 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 23:48:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,892 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 23:48:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 23:48:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,898 INFO L225 Difference]: With dead ends: 812 [2020-08-21 23:48:13,898 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 23:48:13,899 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 23:48:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 23:48:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 23:48:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 23:48:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 23:48:13,920 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 23:48:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:13,920 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 23:48:13,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 23:48:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 23:48:13,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,922 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 23:48:13,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:48:13,923 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 23:48:13,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324930897] [2020-08-21 23:48:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,949 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 23:48:13,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324930897] [2020-08-21 23:48:13,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:13,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639082241] [2020-08-21 23:48:13,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:13,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:13,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:13,951 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 23:48:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:13,981 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 23:48:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:13,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 23:48:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:13,987 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 23:48:13,987 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 23:48:13,989 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 23:48:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 23:48:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 23:48:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 23:48:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 23:48:14,024 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 23:48:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,024 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 23:48:14,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 23:48:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 23:48:14,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,026 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 23:48:14,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:48:14,027 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 23:48:14,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905599088] [2020-08-21 23:48:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,052 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 23:48:14,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905599088] [2020-08-21 23:48:14,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:14,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:14,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990534079] [2020-08-21 23:48:14,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:14,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:14,054 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 23:48:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,083 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 23:48:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:14,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 23:48:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,089 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 23:48:14,089 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 23:48:14,091 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 23:48:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 23:48:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 23:48:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 23:48:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 23:48:14,130 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 23:48:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,131 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 23:48:14,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 23:48:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 23:48:14,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,133 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 23:48:14,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 23:48:14,133 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 23:48:14,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373158223] [2020-08-21 23:48:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,166 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 23:48:14,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373158223] [2020-08-21 23:48:14,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:14,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:14,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288604068] [2020-08-21 23:48:14,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:14,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:14,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:14,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:14,168 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 23:48:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,209 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 23:48:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:14,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 23:48:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,217 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 23:48:14,218 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 23:48:14,219 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 23:48:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 23:48:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 23:48:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 23:48:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 23:48:14,257 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 23:48:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,257 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 23:48:14,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 23:48:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 23:48:14,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:14,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 23:48:14,261 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 23:48:14,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83318806] [2020-08-21 23:48:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,282 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 23:48:14,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83318806] [2020-08-21 23:48:14,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:14,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:14,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093315942] [2020-08-21 23:48:14,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:14,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:14,284 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 23:48:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,330 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 23:48:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:14,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 23:48:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,339 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 23:48:14,339 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 23:48:14,342 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 23:48:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 23:48:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 23:48:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 23:48:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 23:48:14,397 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 23:48:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,397 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 23:48:14,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 23:48:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 23:48:14,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,400 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, 1, 1, 1, 1, 1] [2020-08-21 23:48:14,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 23:48:14,401 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 23:48:14,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144743364] [2020-08-21 23:48:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,432 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 23:48:14,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144743364] [2020-08-21 23:48:14,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:14,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:14,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149449448] [2020-08-21 23:48:14,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:14,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:14,435 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 23:48:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,490 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 23:48:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:14,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 23:48:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,503 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 23:48:14,503 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 23:48:14,506 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 23:48:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 23:48:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 23:48:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 23:48:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 23:48:14,579 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 23:48:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,580 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 23:48:14,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 23:48:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 23:48:14,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,584 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 23:48:14,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 23:48:14,585 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 23:48:14,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026646259] [2020-08-21 23:48:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,613 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 23:48:14,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026646259] [2020-08-21 23:48:14,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:14,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:14,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369034300] [2020-08-21 23:48:14,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:14,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:14,616 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 23:48:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,720 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 23:48:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:14,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 23:48:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,739 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 23:48:14,739 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 23:48:14,740 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 23:48:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 23:48:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 23:48:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 23:48:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 23:48:14,832 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 23:48:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,832 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 23:48:14,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 23:48:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 23:48:14,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,838 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 23:48:14,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 23:48:14,839 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 23:48:14,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791166205] [2020-08-21 23:48:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,872 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 23:48:14,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791166205] [2020-08-21 23:48:14,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:14,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:14,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835535675] [2020-08-21 23:48:14,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:14,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:14,874 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 23:48:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,960 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 23:48:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:14,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 23:48:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,979 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 23:48:14,979 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 23:48:14,984 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 23:48:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 23:48:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 23:48:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 23:48:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 23:48:15,091 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 23:48:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:15,091 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 23:48:15,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 23:48:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 23:48:15,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:15,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:15,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 23:48:15,100 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 23:48:15,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:15,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316192169] [2020-08-21 23:48:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,125 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 23:48:15,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316192169] [2020-08-21 23:48:15,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:15,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:15,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077993511] [2020-08-21 23:48:15,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:15,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:15,127 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 23:48:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:15,212 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 23:48:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:15,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 23:48:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:15,228 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 23:48:15,228 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 23:48:15,231 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 23:48:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 23:48:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 23:48:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 23:48:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 23:48:15,343 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 23:48:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:15,344 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 23:48:15,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 23:48:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 23:48:15,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:15,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:15,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 23:48:15,351 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 23:48:15,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:15,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089394208] [2020-08-21 23:48:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,386 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 23:48:15,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089394208] [2020-08-21 23:48:15,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:15,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:15,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29848932] [2020-08-21 23:48:15,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:15,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:15,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:15,388 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 23:48:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:15,493 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 23:48:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:15,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 23:48:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:15,543 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 23:48:15,544 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 23:48:15,552 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 23:48:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 23:48:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 23:48:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 23:48:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 23:48:15,852 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 23:48:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:15,852 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 23:48:15,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 23:48:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 23:48:15,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:15,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:15,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 23:48:15,861 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 23:48:15,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:15,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148235430] [2020-08-21 23:48:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,891 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 23:48:15,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148235430] [2020-08-21 23:48:15,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:15,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:15,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719257345] [2020-08-21 23:48:15,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:15,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:15,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:15,895 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 23:48:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:16,014 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 23:48:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:16,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 23:48:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:16,030 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 23:48:16,030 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 23:48:16,033 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 23:48:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 23:48:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 23:48:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 23:48:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 23:48:16,258 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 23:48:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:16,259 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 23:48:16,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 23:48:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 23:48:16,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:16,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:16,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 23:48:16,268 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 23:48:16,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:16,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322481873] [2020-08-21 23:48:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,297 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 23:48:16,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322481873] [2020-08-21 23:48:16,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:16,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:16,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198252169] [2020-08-21 23:48:16,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:16,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:16,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:16,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:16,299 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 23:48:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:16,554 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 23:48:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:16,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 23:48:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:16,580 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 23:48:16,580 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 23:48:16,584 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 23:48:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 23:48:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 23:48:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 23:48:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 23:48:16,829 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 23:48:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:16,829 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 23:48:16,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 23:48:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 23:48:16,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:16,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:16,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 23:48:16,846 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 23:48:16,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:16,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948164073] [2020-08-21 23:48:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,874 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 23:48:16,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948164073] [2020-08-21 23:48:16,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:16,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:48:16,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245371974] [2020-08-21 23:48:16,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:48:16,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:48:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:48:16,877 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 23:48:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:17,207 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 23:48:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:48:17,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 23:48:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:17,209 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 23:48:17,209 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 23:48:17,242 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 23:48:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 23:48:17,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 23:48:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 23:48:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 23:48:17,242 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 23:48:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:17,243 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 23:48:17,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:48:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 23:48:17,243 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 23:48:17,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 23:48:17,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 23:48:17,268 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 23:48:17,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:48:17,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:48:17,268 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 23:48:17,268 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 23:48:17,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 23:48:17,269 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,270 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,270 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 23:48:17,271 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 23:48:17,271 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 23:48:17,271 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,271 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 23:48:17,271 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,271 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 23:48:17,271 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,272 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,273 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 23:48:17,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:48:17 BoogieIcfgContainer [2020-08-21 23:48:17,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:48:17,298 INFO L168 Benchmark]: Toolchain (without parser) took 6195.56 ms. Allocated memory was 141.0 MB in the beginning and 320.3 MB in the end (delta: 179.3 MB). Free memory was 104.2 MB in the beginning and 181.4 MB in the end (delta: -77.2 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:17,299 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 23:48:17,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.84 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:17,302 INFO L168 Benchmark]: Boogie Preprocessor took 188.12 ms. Allocated memory was 141.0 MB in the beginning and 207.1 MB in the end (delta: 66.1 MB). Free memory was 93.4 MB in the beginning and 184.5 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:17,304 INFO L168 Benchmark]: RCFGBuilder took 453.98 ms. Allocated memory is still 207.1 MB. Free memory was 184.5 MB in the beginning and 166.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:17,309 INFO L168 Benchmark]: TraceAbstraction took 5207.44 ms. Allocated memory was 207.1 MB in the beginning and 320.3 MB in the end (delta: 113.2 MB). Free memory was 166.2 MB in the beginning and 181.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 98.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:17,312 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.84 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 188.12 ms. Allocated memory was 141.0 MB in the beginning and 207.1 MB in the end (delta: 66.1 MB). Free memory was 93.4 MB in the beginning and 184.5 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.98 ms. Allocated memory is still 207.1 MB. Free memory was 184.5 MB in the beginning and 166.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5207.44 ms. Allocated memory was 207.1 MB in the beginning and 320.3 MB in the end (delta: 113.2 MB). Free memory was 166.2 MB in the beginning and 181.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 98.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...