/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:02:56,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:02:56,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:02:56,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:02:56,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:02:56,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:02:56,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:02:56,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:02:56,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:02:56,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:02:56,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:02:56,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:02:56,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:02:56,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:02:56,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:02:56,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:02:56,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:02:56,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:02:56,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:02:56,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:02:56,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:02:56,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:02:56,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:02:56,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:02:56,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:02:56,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:02:56,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:02:56,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:02:56,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:02:56,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:02:56,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:02:56,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:02:56,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:02:56,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 03:02:56,962 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:02:56,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:02:56,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:02:56,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:02:56,964 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:02:56,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:02:56,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:02:56,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:02:56,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:02:56,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:02:56,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:02:56,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:02:56,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:02:56,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:02:56,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:02:56,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:02:56,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:02:56,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:02:56,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:02:56,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:02:56,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:02:56,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:02:56,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:02:56,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:02:56,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:02:56,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:02:56,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:02:56,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:02:56,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:02:56,969 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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:02:57,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:02:57,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:02:57,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:02:57,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:02:57,291 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:02:57,292 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-22 03:02:57,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d079f988/405ba784d1a8411789f82268168ddbca/FLAG5aee38dc8 [2020-08-22 03:02:57,813 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:02:57,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-22 03:02:57,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d079f988/405ba784d1a8411789f82268168ddbca/FLAG5aee38dc8 [2020-08-22 03:02:58,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d079f988/405ba784d1a8411789f82268168ddbca [2020-08-22 03:02:58,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:02:58,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:02:58,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:02:58,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:02:58,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:02:58,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef5dd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58, skipping insertion in model container [2020-08-22 03:02:58,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:02:58,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:02:58,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:02:58,432 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:02:58,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:02:58,471 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:02:58,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58 WrapperNode [2020-08-22 03:02:58,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:02:58,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:02:58,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:02:58,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:02:58,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... [2020-08-22 03:02:58,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:02:58,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:02:58,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:02:58,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:02:58,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:02:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:02:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:02:58,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:02:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:02:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:02:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:02:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:02:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:02:58,920 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:02:58,921 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:02:58,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:02:58 BoogieIcfgContainer [2020-08-22 03:02:58,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:02:58,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:02:58,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:02:58,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:02:58,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:02:58" (1/3) ... [2020-08-22 03:02:58,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776e740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:02:58, skipping insertion in model container [2020-08-22 03:02:58,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:58" (2/3) ... [2020-08-22 03:02:58,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776e740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:02:58, skipping insertion in model container [2020-08-22 03:02:58,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:02:58" (3/3) ... [2020-08-22 03:02:58,932 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-22 03:02:58,942 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:02:58,949 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:02:58,963 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:02:58,987 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:02:58,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:02:58,987 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:02:58,988 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:02:58,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:02:58,988 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:02:58,988 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:02:58,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:02:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-22 03:02:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:02:59,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,016 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-22 03:02:59,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664611710] [2020-08-22 03:02:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664611710] [2020-08-22 03:02:59,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201570777] [2020-08-22 03:02:59,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,245 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-22 03:02:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,297 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-22 03:02:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 03:02:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,312 INFO L225 Difference]: With dead ends: 63 [2020-08-22 03:02:59,312 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:02:59,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:02:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-22 03:02:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 03:02:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-22 03:02:59,372 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-22 03:02:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,373 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-22 03:02:59,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-22 03:02:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:02:59,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:02:59,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-22 03:02:59,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958239825] [2020-08-22 03:02:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958239825] [2020-08-22 03:02:59,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83274961] [2020-08-22 03:02:59,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,483 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-22 03:02:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,516 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-22 03:02:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 03:02:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,518 INFO L225 Difference]: With dead ends: 77 [2020-08-22 03:02:59,519 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:02:59,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:02:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-22 03:02:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 03:02:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-22 03:02:59,534 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-22 03:02:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,534 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-22 03:02:59,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-22 03:02:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:02:59,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:02:59,537 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,537 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-22 03:02:59,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386130741] [2020-08-22 03:02:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386130741] [2020-08-22 03:02:59,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371706552] [2020-08-22 03:02:59,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,602 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-22 03:02:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,625 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-22 03:02:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:02:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,627 INFO L225 Difference]: With dead ends: 72 [2020-08-22 03:02:59,627 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 03:02:59,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 03:02:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-22 03:02:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 03:02:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-22 03:02:59,637 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-22 03:02:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,638 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-22 03:02:59,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-22 03:02:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:02:59,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:02:59,640 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-22 03:02:59,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980952216] [2020-08-22 03:02:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980952216] [2020-08-22 03:02:59,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478637359] [2020-08-22 03:02:59,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,701 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-22 03:02:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,738 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-22 03:02:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:02:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,742 INFO L225 Difference]: With dead ends: 88 [2020-08-22 03:02:59,742 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 03:02:59,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 03:02:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-22 03:02:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 03:02:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-22 03:02:59,753 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-22 03:02:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,754 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-22 03:02:59,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-22 03:02:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:02:59,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:02:59,756 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-22 03:02:59,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13936778] [2020-08-22 03:02:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13936778] [2020-08-22 03:02:59,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695374112] [2020-08-22 03:02:59,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,795 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-22 03:02:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,821 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-22 03:02:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:02:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,823 INFO L225 Difference]: With dead ends: 144 [2020-08-22 03:02:59,823 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 03:02:59,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 03:02:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-22 03:02:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-22 03:02:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-22 03:02:59,837 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-22 03:02:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,837 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-22 03:02:59,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-22 03:02:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:02:59,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:02:59,839 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-22 03:02:59,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373057247] [2020-08-22 03:02:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373057247] [2020-08-22 03:02:59,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409187315] [2020-08-22 03:02:59,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,876 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-22 03:02:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,899 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-22 03:02:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:02:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,901 INFO L225 Difference]: With dead ends: 129 [2020-08-22 03:02:59,901 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 03:02:59,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 03:02:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-22 03:02:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 03:02:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-22 03:02:59,914 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-22 03:02:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,914 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-22 03:02:59,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-22 03:02:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:02:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:59,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:59,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:02:59,917 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-22 03:02:59,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:59,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732112462] [2020-08-22 03:02:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:59,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732112462] [2020-08-22 03:02:59,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:59,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:02:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407238329] [2020-08-22 03:02:59,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:02:59,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:02:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,953 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-22 03:02:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:59,974 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-22 03:02:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:02:59,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:02:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:59,977 INFO L225 Difference]: With dead ends: 156 [2020-08-22 03:02:59,977 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 03:02:59,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:02:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 03:02:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-22 03:02:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 03:02:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-22 03:02:59,995 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-22 03:02:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:59,996 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-22 03:02:59,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:02:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-22 03:03:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:03:00,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:03:00,001 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-22 03:03:00,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385323412] [2020-08-22 03:03:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385323412] [2020-08-22 03:03:00,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043501619] [2020-08-22 03:03:00,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,070 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-22 03:03:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,098 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-22 03:03:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:03:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,100 INFO L225 Difference]: With dead ends: 272 [2020-08-22 03:03:00,100 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 03:03:00,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 03:03:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-22 03:03:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 03:03:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-22 03:03:00,132 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-22 03:03:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,133 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-22 03:03:00,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-22 03:03:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:03:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:03:00,135 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-22 03:03:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629606705] [2020-08-22 03:03:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629606705] [2020-08-22 03:03:00,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968423553] [2020-08-22 03:03:00,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,164 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-22 03:03:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,184 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-22 03:03:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:03:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,186 INFO L225 Difference]: With dead ends: 240 [2020-08-22 03:03:00,186 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 03:03:00,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 03:03:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-22 03:03:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-22 03:03:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-22 03:03:00,212 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-22 03:03:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,215 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-22 03:03:00,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-22 03:03:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:03:00,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:03:00,219 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-22 03:03:00,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229567443] [2020-08-22 03:03:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229567443] [2020-08-22 03:03:00,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751631563] [2020-08-22 03:03:00,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,283 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-22 03:03:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,309 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-22 03:03:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:03:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,312 INFO L225 Difference]: With dead ends: 284 [2020-08-22 03:03:00,312 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 03:03:00,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 03:03:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-22 03:03:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 03:03:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-22 03:03:00,335 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-22 03:03:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,335 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-22 03:03:00,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-22 03:03:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:03:00,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:03:00,337 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-22 03:03:00,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928387679] [2020-08-22 03:03:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928387679] [2020-08-22 03:03:00,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567703219] [2020-08-22 03:03:00,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,367 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-22 03:03:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,391 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-22 03:03:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:03:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,394 INFO L225 Difference]: With dead ends: 524 [2020-08-22 03:03:00,394 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 03:03:00,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 03:03:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-22 03:03:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 03:03:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-22 03:03:00,414 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-22 03:03:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,415 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-22 03:03:00,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-22 03:03:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:03:00,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,417 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] [2020-08-22 03:03:00,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:03:00,422 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,423 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-22 03:03:00,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805828138] [2020-08-22 03:03:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805828138] [2020-08-22 03:03:00,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699713876] [2020-08-22 03:03:00,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,453 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-22 03:03:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,477 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-22 03:03:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:03:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,482 INFO L225 Difference]: With dead ends: 456 [2020-08-22 03:03:00,483 INFO L226 Difference]: Without dead ends: 314 [2020-08-22 03:03:00,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-22 03:03:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-22 03:03:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 03:03:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-22 03:03:00,504 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-22 03:03:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,504 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-22 03:03:00,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-22 03:03:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:03:00,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:03:00,512 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,512 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-22 03:03:00,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527225700] [2020-08-22 03:03:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527225700] [2020-08-22 03:03:00,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395935310] [2020-08-22 03:03:00,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,610 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-22 03:03:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,633 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-22 03:03:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:03:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,637 INFO L225 Difference]: With dead ends: 524 [2020-08-22 03:03:00,637 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 03:03:00,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 03:03:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-22 03:03:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 03:03:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-22 03:03:00,654 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-22 03:03:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,654 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-22 03:03:00,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-22 03:03:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:03:00,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,656 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] [2020-08-22 03:03:00,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:03:00,657 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-22 03:03:00,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710006209] [2020-08-22 03:03:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710006209] [2020-08-22 03:03:00,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477108559] [2020-08-22 03:03:00,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,680 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-22 03:03:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,706 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-22 03:03:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:03:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,710 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 03:03:00,710 INFO L226 Difference]: Without dead ends: 586 [2020-08-22 03:03:00,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-22 03:03:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-22 03:03:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 03:03:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-22 03:03:00,733 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-22 03:03:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,733 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-22 03:03:00,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-22 03:03:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:03:00,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:03:00,736 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-22 03:03:00,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087529631] [2020-08-22 03:03:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087529631] [2020-08-22 03:03:00,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029133914] [2020-08-22 03:03:00,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,758 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-22 03:03:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,783 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-22 03:03:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:03:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,788 INFO L225 Difference]: With dead ends: 876 [2020-08-22 03:03:00,788 INFO L226 Difference]: Without dead ends: 602 [2020-08-22 03:03:00,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-22 03:03:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-22 03:03:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-22 03:03:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-22 03:03:00,812 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-22 03:03:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,812 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-22 03:03:00,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-22 03:03:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:03:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:03:00,815 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-22 03:03:00,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346706207] [2020-08-22 03:03:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346706207] [2020-08-22 03:03:00,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354130851] [2020-08-22 03:03:00,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,856 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-22 03:03:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:00,891 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-22 03:03:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:00,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:03:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:00,897 INFO L225 Difference]: With dead ends: 970 [2020-08-22 03:03:00,898 INFO L226 Difference]: Without dead ends: 968 [2020-08-22 03:03:00,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-22 03:03:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-22 03:03:00,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-22 03:03:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-22 03:03:00,933 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-22 03:03:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:00,935 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-22 03:03:00,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-22 03:03:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:03:00,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:03:00,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:03:00,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:03:00,938 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:03:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:03:00,938 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-22 03:03:00,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:03:00,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021205798] [2020-08-22 03:03:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:03:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:03:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:03:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:03:00,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021205798] [2020-08-22 03:03:00,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:03:00,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:03:00,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312244249] [2020-08-22 03:03:00,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:03:00,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:03:00,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:03:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:00,973 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-22 03:03:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:03:01,015 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-22 03:03:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:03:01,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:03:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:03:01,017 INFO L225 Difference]: With dead ends: 1992 [2020-08-22 03:03:01,017 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:03:01,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:03:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:03:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:03:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:03:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:03:01,022 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-22 03:03:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:03:01,023 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:03:01,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:03:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:03:01,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:03:01,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:03:01,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:03:01,053 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:03:01,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:03:01,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:03:01,054 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:03:01,054 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:03:01,054 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:03:01,068 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-22 03:03:01,068 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-22 03:03:01,068 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,068 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-22 03:03:01,068 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-22 03:03:01,068 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-22 03:03:01,069 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,069 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,069 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,069 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-22 03:03:01,070 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-22 03:03:01,070 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,070 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-22 03:03:01,071 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-22 03:03:01,071 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-22 03:03:01,071 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,071 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-22 03:03:01,072 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-22 03:03:01,072 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-22 03:03:01,072 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-22 03:03:01,072 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,072 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,072 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,074 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-22 03:03:01,074 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,074 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:03:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:03:01 BoogieIcfgContainer [2020-08-22 03:03:01,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:03:01,103 INFO L168 Benchmark]: Toolchain (without parser) took 2883.80 ms. Allocated memory was 139.5 MB in the beginning and 246.9 MB in the end (delta: 107.5 MB). Free memory was 101.0 MB in the beginning and 217.2 MB in the end (delta: -116.1 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:03:01,104 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:03:01,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.16 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 90.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:03:01,110 INFO L168 Benchmark]: Boogie Preprocessor took 132.11 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 179.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 03:03:01,111 INFO L168 Benchmark]: RCFGBuilder took 319.23 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 164.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:03:01,114 INFO L168 Benchmark]: TraceAbstraction took 2166.70 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 163.9 MB in the beginning and 217.2 MB in the end (delta: -53.3 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:03:01,117 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.16 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 90.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.11 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 179.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.23 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 164.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2166.70 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 163.9 MB in the beginning and 217.2 MB in the end (delta: -53.3 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: 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: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 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, 0.5s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...