/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:38:37,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:38:37,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:38:37,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:38:37,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:38:37,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:38:37,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:38:37,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:38:37,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:38:37,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:38:37,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:38:37,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:38:37,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:38:37,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:38:37,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:38:37,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:38:37,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:38:37,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:38:37,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:38:37,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:38:37,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:38:37,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:38:37,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:38:37,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:38:37,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:38:37,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:38:37,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:38:37,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:38:37,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:38:37,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:38:37,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:38:37,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:38:37,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:38:37,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:38:37,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:38:37,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:38:37,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:38:37,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:38:37,743 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:38:37,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:38:37,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:38:37,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:38:37,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:38:37,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:38:37,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:38:37,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:38:37,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:38:37,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:38:37,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:38:37,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:38:37,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:38:37,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:38:37,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:38:37,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:38:37,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:38:37,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:38:37,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:38:37,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:38:37,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:38:37,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:38:37,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:38:37,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:38:37,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:38:37,749 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:38:38,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:38:38,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:38:38,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:38:38,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:38:38,055 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:38:38,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 16:38:38,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b85a8fa1/b466840ae1914106b4b01dcd019824d4/FLAG42c2e20c8 [2020-08-21 16:38:38,508 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:38:38,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 16:38:38,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b85a8fa1/b466840ae1914106b4b01dcd019824d4/FLAG42c2e20c8 [2020-08-21 16:38:38,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b85a8fa1/b466840ae1914106b4b01dcd019824d4 [2020-08-21 16:38:38,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:38:38,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:38:38,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:38:38,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:38:38,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:38:38,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:38:38" (1/1) ... [2020-08-21 16:38:38,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4365ba2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:38, skipping insertion in model container [2020-08-21 16:38:38,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:38:38" (1/1) ... [2020-08-21 16:38:38,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:38:38,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:38:39,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:38:39,244 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:38:39,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:38:39,365 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:38:39,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39 WrapperNode [2020-08-21 16:38:39,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:38:39,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:38:39,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:38:39,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:38:39,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... [2020-08-21 16:38:39,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:38:39,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:38:39,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:38:39,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:38:39,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:38:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:38:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:38:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:38:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-21 16:38:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-21 16:38:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:38:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:38:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:38:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:38:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-21 16:38:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:38:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-21 16:38:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:38:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:38:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:38:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:38:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:38:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:38:39,861 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:38:39,861 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-21 16:38:39,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:38:39 BoogieIcfgContainer [2020-08-21 16:38:39,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:38:39,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:38:39,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:38:39,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:38:39,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:38:38" (1/3) ... [2020-08-21 16:38:39,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a8819d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:38:39, skipping insertion in model container [2020-08-21 16:38:39,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:39" (2/3) ... [2020-08-21 16:38:39,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a8819d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:38:39, skipping insertion in model container [2020-08-21 16:38:39,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:38:39" (3/3) ... [2020-08-21 16:38:39,874 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-21 16:38:39,885 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:38:39,891 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:38:39,905 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:38:39,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:38:39,932 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:38:39,932 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:38:39,932 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:38:39,932 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:38:39,932 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:38:39,933 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:38:39,933 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:38:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 16:38:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:38:39,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:39,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:39,965 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:39,970 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-21 16:38:39,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:39,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320019973] [2020-08-21 16:38:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:40,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:40,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320019973] [2020-08-21 16:38:40,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:38:40,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:38:40,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273236594] [2020-08-21 16:38:40,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:38:40,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:40,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:38:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:38:40,192 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 16:38:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:40,471 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-21 16:38:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:38:40,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 16:38:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:40,484 INFO L225 Difference]: With dead ends: 150 [2020-08-21 16:38:40,485 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 16:38:40,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:38:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 16:38:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-21 16:38:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 16:38:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-21 16:38:40,541 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-21 16:38:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:40,542 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-21 16:38:40,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:38:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-21 16:38:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 16:38:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:40,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:40,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:38:40,544 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-21 16:38:40,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:40,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371656975] [2020-08-21 16:38:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:40,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:40,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371656975] [2020-08-21 16:38:40,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:40,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 16:38:40,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117320167] [2020-08-21 16:38:40,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:38:40,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:40,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:38:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:40,661 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-21 16:38:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:40,950 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-21 16:38:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:38:40,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 16:38:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:40,952 INFO L225 Difference]: With dead ends: 170 [2020-08-21 16:38:40,953 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 16:38:40,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 16:38:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-21 16:38:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 16:38:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-21 16:38:40,967 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-21 16:38:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:40,968 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-21 16:38:40,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:38:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-21 16:38:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:38:40,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:40,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:40,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:38:40,969 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:40,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-21 16:38:40,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:40,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842263410] [2020-08-21 16:38:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:41,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:41,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842263410] [2020-08-21 16:38:41,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:41,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:38:41,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116704451] [2020-08-21 16:38:41,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:38:41,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:38:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:38:41,085 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-21 16:38:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:41,347 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-21 16:38:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:38:41,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 16:38:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:41,351 INFO L225 Difference]: With dead ends: 203 [2020-08-21 16:38:41,351 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 16:38:41,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:38:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 16:38:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-21 16:38:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 16:38:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-21 16:38:41,365 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-21 16:38:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:41,365 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-21 16:38:41,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:38:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-21 16:38:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:38:41,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:41,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:41,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:38:41,367 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-21 16:38:41,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:41,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840726934] [2020-08-21 16:38:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:41,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:41,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840726934] [2020-08-21 16:38:41,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:41,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:38:41,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992181733] [2020-08-21 16:38:41,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:38:41,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:41,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:38:41,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:38:41,445 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-21 16:38:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:41,800 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-21 16:38:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:38:41,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 16:38:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:41,803 INFO L225 Difference]: With dead ends: 236 [2020-08-21 16:38:41,803 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 16:38:41,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:38:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 16:38:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-21 16:38:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 16:38:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-21 16:38:41,817 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-21 16:38:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:41,817 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-21 16:38:41,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:38:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-21 16:38:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:38:41,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:41,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:41,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:38:41,819 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-21 16:38:41,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:41,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418671926] [2020-08-21 16:38:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:41,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 16:38:41,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418671926] [2020-08-21 16:38:41,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:38:41,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:38:41,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44768090] [2020-08-21 16:38:41,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:38:41,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:38:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:41,882 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-21 16:38:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:41,993 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-21 16:38:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:38:41,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 16:38:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:41,995 INFO L225 Difference]: With dead ends: 116 [2020-08-21 16:38:41,995 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 16:38:41,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 16:38:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-21 16:38:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 16:38:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-21 16:38:42,004 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-21 16:38:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:42,004 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-21 16:38:42,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:38:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-21 16:38:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 16:38:42,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:42,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:42,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:38:42,007 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-21 16:38:42,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:42,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210750095] [2020-08-21 16:38:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 16:38:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 16:38:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:42,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210750095] [2020-08-21 16:38:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:42,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:38:42,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230358679] [2020-08-21 16:38:42,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:38:42,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:38:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:38:42,129 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-21 16:38:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:42,450 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-21 16:38:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:38:42,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 16:38:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:42,459 INFO L225 Difference]: With dead ends: 223 [2020-08-21 16:38:42,459 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 16:38:42,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:38:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 16:38:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-21 16:38:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 16:38:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-21 16:38:42,472 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-21 16:38:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:42,475 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-21 16:38:42,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:38:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-21 16:38:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 16:38:42,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:42,478 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:42,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:38:42,478 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-21 16:38:42,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:42,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831388873] [2020-08-21 16:38:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 16:38:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 16:38:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:42,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831388873] [2020-08-21 16:38:42,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:42,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:38:42,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837866489] [2020-08-21 16:38:42,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:38:42,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:38:42,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:38:42,598 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-21 16:38:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:42,968 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-21 16:38:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:38:42,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 16:38:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:42,971 INFO L225 Difference]: With dead ends: 246 [2020-08-21 16:38:42,971 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 16:38:42,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:38:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 16:38:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-21 16:38:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 16:38:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-21 16:38:42,982 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-21 16:38:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:42,982 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-21 16:38:42,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:38:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-21 16:38:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 16:38:42,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:42,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:42,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:38:42,984 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-21 16:38:42,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:42,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258701522] [2020-08-21 16:38:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 16:38:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 16:38:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:43,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258701522] [2020-08-21 16:38:43,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:43,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:38:43,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519743802] [2020-08-21 16:38:43,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:38:43,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:38:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:38:43,111 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-21 16:38:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:43,553 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-21 16:38:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:38:43,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 16:38:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:43,556 INFO L225 Difference]: With dead ends: 269 [2020-08-21 16:38:43,556 INFO L226 Difference]: Without dead ends: 219 [2020-08-21 16:38:43,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:38:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-21 16:38:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-21 16:38:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 16:38:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-21 16:38:43,568 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-21 16:38:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:43,568 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-21 16:38:43,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:38:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-21 16:38:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 16:38:43,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:43,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:43,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:38:43,570 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-21 16:38:43,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:43,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267507002] [2020-08-21 16:38:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 16:38:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 16:38:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:43,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267507002] [2020-08-21 16:38:43,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:43,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:38:43,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062495481] [2020-08-21 16:38:43,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:38:43,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:38:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:38:43,679 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-21 16:38:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:44,189 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-21 16:38:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 16:38:44,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-21 16:38:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:44,193 INFO L225 Difference]: With dead ends: 292 [2020-08-21 16:38:44,193 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 16:38:44,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:38:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 16:38:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-21 16:38:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 16:38:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-21 16:38:44,209 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-21 16:38:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:44,209 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-21 16:38:44,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:38:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-21 16:38:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 16:38:44,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:44,216 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:44,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:38:44,216 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-21 16:38:44,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:44,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608934328] [2020-08-21 16:38:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 16:38:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:38:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:44,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608934328] [2020-08-21 16:38:44,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:44,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:38:44,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389236327] [2020-08-21 16:38:44,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:38:44,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:44,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:38:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:38:44,390 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-21 16:38:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:44,972 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-21 16:38:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:38:44,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-21 16:38:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:44,975 INFO L225 Difference]: With dead ends: 315 [2020-08-21 16:38:44,975 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 16:38:44,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:38:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 16:38:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-21 16:38:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 16:38:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-21 16:38:44,984 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-21 16:38:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:44,984 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-21 16:38:44,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:38:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-21 16:38:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 16:38:44,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:44,986 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:44,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:38:44,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-21 16:38:44,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:44,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438034633] [2020-08-21 16:38:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 16:38:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 16:38:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:45,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438034633] [2020-08-21 16:38:45,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:45,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:38:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504177099] [2020-08-21 16:38:45,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:38:45,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:38:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:38:45,130 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-21 16:38:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:45,676 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-21 16:38:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:38:45,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-21 16:38:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:45,680 INFO L225 Difference]: With dead ends: 338 [2020-08-21 16:38:45,680 INFO L226 Difference]: Without dead ends: 288 [2020-08-21 16:38:45,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:38:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-21 16:38:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-21 16:38:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 16:38:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-21 16:38:45,692 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-21 16:38:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:45,693 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-21 16:38:45,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:38:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-21 16:38:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 16:38:45,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:45,695 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:45,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:38:45,696 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-21 16:38:45,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:45,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150505531] [2020-08-21 16:38:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 16:38:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:38:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:45,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150505531] [2020-08-21 16:38:45,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:45,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 16:38:45,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228006458] [2020-08-21 16:38:45,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:38:45,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:38:45,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:38:45,860 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-21 16:38:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:46,509 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-21 16:38:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:38:46,510 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 16:38:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:46,512 INFO L225 Difference]: With dead ends: 361 [2020-08-21 16:38:46,512 INFO L226 Difference]: Without dead ends: 311 [2020-08-21 16:38:46,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:38:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-21 16:38:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-21 16:38:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 16:38:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-21 16:38:46,520 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-21 16:38:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:46,521 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-21 16:38:46,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 16:38:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-21 16:38:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 16:38:46,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:46,522 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:46,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:38:46,522 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-21 16:38:46,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:46,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452377496] [2020-08-21 16:38:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:46,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:46,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 16:38:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:38:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:46,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452377496] [2020-08-21 16:38:46,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:46,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 16:38:46,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426811745] [2020-08-21 16:38:46,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 16:38:46,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 16:38:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:38:46,678 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-21 16:38:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:47,409 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-21 16:38:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 16:38:47,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-21 16:38:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:47,413 INFO L225 Difference]: With dead ends: 384 [2020-08-21 16:38:47,414 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 16:38:47,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:38:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 16:38:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-21 16:38:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 16:38:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-21 16:38:47,423 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-21 16:38:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:47,424 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-21 16:38:47,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 16:38:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-21 16:38:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 16:38:47,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:47,425 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:47,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:38:47,425 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-21 16:38:47,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:47,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745751666] [2020-08-21 16:38:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:47,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:47,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:38:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:47,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 16:38:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:47,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745751666] [2020-08-21 16:38:47,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:47,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 16:38:47,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109142730] [2020-08-21 16:38:47,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 16:38:47,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 16:38:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:38:47,625 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-21 16:38:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:48,306 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-21 16:38:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:38:48,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-21 16:38:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:48,309 INFO L225 Difference]: With dead ends: 407 [2020-08-21 16:38:48,310 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 16:38:48,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:38:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 16:38:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-21 16:38:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 16:38:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-21 16:38:48,319 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-21 16:38:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:48,319 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-21 16:38:48,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 16:38:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-21 16:38:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 16:38:48,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:48,320 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:48,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:38:48,321 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-21 16:38:48,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:48,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23630542] [2020-08-21 16:38:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:48,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 16:38:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:38:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:48,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23630542] [2020-08-21 16:38:48,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:48,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 16:38:48,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009066333] [2020-08-21 16:38:48,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 16:38:48,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:48,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 16:38:48,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:38:48,510 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-21 16:38:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:49,338 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-21 16:38:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 16:38:49,339 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-21 16:38:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:49,343 INFO L225 Difference]: With dead ends: 430 [2020-08-21 16:38:49,343 INFO L226 Difference]: Without dead ends: 380 [2020-08-21 16:38:49,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:38:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-21 16:38:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-21 16:38:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 16:38:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-21 16:38:49,355 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-21 16:38:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:49,355 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-21 16:38:49,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 16:38:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-21 16:38:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:38:49,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:49,356 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:49,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:38:49,357 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-21 16:38:49,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:49,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741912443] [2020-08-21 16:38:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:49,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:49,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:38:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:49,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 16:38:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:49,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741912443] [2020-08-21 16:38:49,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:49,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 16:38:49,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392200923] [2020-08-21 16:38:49,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 16:38:49,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 16:38:49,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:38:49,611 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-21 16:38:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:50,503 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-21 16:38:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 16:38:50,504 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-21 16:38:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:50,507 INFO L225 Difference]: With dead ends: 453 [2020-08-21 16:38:50,508 INFO L226 Difference]: Without dead ends: 403 [2020-08-21 16:38:50,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-21 16:38:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-21 16:38:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-21 16:38:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 16:38:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-21 16:38:50,527 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-21 16:38:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:50,530 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-21 16:38:50,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 16:38:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-21 16:38:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 16:38:50,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:50,531 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:50,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:38:50,532 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-21 16:38:50,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:50,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031179969] [2020-08-21 16:38:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:50,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:50,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:38:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:50,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 16:38:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:50,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031179969] [2020-08-21 16:38:50,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:50,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 16:38:50,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576625667] [2020-08-21 16:38:50,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 16:38:50,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 16:38:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:38:50,768 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-21 16:38:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:51,610 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-21 16:38:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 16:38:51,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-21 16:38:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:51,613 INFO L225 Difference]: With dead ends: 476 [2020-08-21 16:38:51,613 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 16:38:51,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:38:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 16:38:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-21 16:38:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 16:38:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-21 16:38:51,628 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-21 16:38:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:51,628 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-21 16:38:51,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 16:38:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-21 16:38:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 16:38:51,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:51,629 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:51,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 16:38:51,630 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-21 16:38:51,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:51,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899488072] [2020-08-21 16:38:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:51,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 16:38:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:51,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 16:38:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:51,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899488072] [2020-08-21 16:38:51,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:51,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 16:38:51,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150357002] [2020-08-21 16:38:51,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 16:38:51,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:51,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 16:38:51,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 16:38:51,865 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-21 16:38:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:53,003 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-21 16:38:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 16:38:53,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-21 16:38:53,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:53,010 INFO L225 Difference]: With dead ends: 499 [2020-08-21 16:38:53,010 INFO L226 Difference]: Without dead ends: 449 [2020-08-21 16:38:53,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-21 16:38:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-21 16:38:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-21 16:38:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 16:38:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-21 16:38:53,023 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-21 16:38:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:53,024 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-21 16:38:53,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 16:38:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-21 16:38:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 16:38:53,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:53,025 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:53,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 16:38:53,026 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:53,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-21 16:38:53,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:53,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345772115] [2020-08-21 16:38:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:53,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:53,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:38:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:53,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 16:38:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:53,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345772115] [2020-08-21 16:38:53,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:53,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 16:38:53,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099135496] [2020-08-21 16:38:53,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 16:38:53,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 16:38:53,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:38:53,309 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-21 16:38:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:54,462 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-21 16:38:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 16:38:54,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-21 16:38:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:54,467 INFO L225 Difference]: With dead ends: 522 [2020-08-21 16:38:54,467 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 16:38:54,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-21 16:38:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 16:38:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-21 16:38:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 16:38:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-21 16:38:54,488 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-21 16:38:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:54,489 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-21 16:38:54,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 16:38:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-21 16:38:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 16:38:54,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:54,490 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:54,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 16:38:54,491 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:54,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-21 16:38:54,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:54,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888664825] [2020-08-21 16:38:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:54,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 16:38:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 16:38:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:54,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888664825] [2020-08-21 16:38:54,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:54,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 16:38:54,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167077193] [2020-08-21 16:38:54,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 16:38:54,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:54,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 16:38:54,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 16:38:54,821 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-21 16:38:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:56,044 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-21 16:38:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 16:38:56,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-21 16:38:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:56,049 INFO L225 Difference]: With dead ends: 545 [2020-08-21 16:38:56,049 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 16:38:56,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-21 16:38:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 16:38:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-21 16:38:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 16:38:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-21 16:38:56,059 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-21 16:38:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:56,059 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-21 16:38:56,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 16:38:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-21 16:38:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 16:38:56,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:56,061 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:56,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 16:38:56,061 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-21 16:38:56,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:56,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218472074] [2020-08-21 16:38:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 16:38:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 16:38:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:56,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218472074] [2020-08-21 16:38:56,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:56,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 16:38:56,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309087582] [2020-08-21 16:38:56,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 16:38:56,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:56,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 16:38:56,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 16:38:56,369 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-21 16:38:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:57,439 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-21 16:38:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 16:38:57,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-21 16:38:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:57,443 INFO L225 Difference]: With dead ends: 568 [2020-08-21 16:38:57,443 INFO L226 Difference]: Without dead ends: 518 [2020-08-21 16:38:57,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-21 16:38:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-21 16:38:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-21 16:38:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-21 16:38:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-21 16:38:57,453 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-21 16:38:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:57,454 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-21 16:38:57,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 16:38:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-21 16:38:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 16:38:57,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:57,455 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:57,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 16:38:57,455 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-21 16:38:57,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:57,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463563090] [2020-08-21 16:38:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:57,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:57,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 16:38:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:57,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 16:38:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:57,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463563090] [2020-08-21 16:38:57,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:57,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 16:38:57,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536607303] [2020-08-21 16:38:57,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 16:38:57,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 16:38:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 16:38:57,845 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-21 16:38:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:59,182 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-21 16:38:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 16:38:59,183 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 16:38:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:59,187 INFO L225 Difference]: With dead ends: 591 [2020-08-21 16:38:59,187 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 16:38:59,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-21 16:38:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 16:38:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-21 16:38:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 16:38:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-21 16:38:59,199 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-21 16:38:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:59,199 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-21 16:38:59,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 16:38:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-21 16:38:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 16:38:59,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:59,200 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:59,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 16:38:59,200 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-21 16:38:59,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:59,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514392484] [2020-08-21 16:38:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:59,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:59,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 16:38:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 16:38:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:59,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514392484] [2020-08-21 16:38:59,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:59,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 16:38:59,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675237735] [2020-08-21 16:38:59,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 16:38:59,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 16:38:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 16:38:59,603 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-21 16:39:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:00,887 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-21 16:39:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 16:39:00,887 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-21 16:39:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:00,890 INFO L225 Difference]: With dead ends: 614 [2020-08-21 16:39:00,890 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 16:39:00,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-21 16:39:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 16:39:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-21 16:39:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 16:39:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-21 16:39:00,901 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-21 16:39:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:00,902 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-21 16:39:00,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 16:39:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-21 16:39:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 16:39:00,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:00,903 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:00,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 16:39:00,903 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:00,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:00,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-21 16:39:00,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:00,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104454513] [2020-08-21 16:39:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:01,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 16:39:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:01,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 16:39:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:01,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104454513] [2020-08-21 16:39:01,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:01,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 16:39:01,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810813017] [2020-08-21 16:39:01,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 16:39:01,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 16:39:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 16:39:01,285 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-21 16:39:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:03,017 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-21 16:39:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 16:39:03,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-21 16:39:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:03,022 INFO L225 Difference]: With dead ends: 637 [2020-08-21 16:39:03,023 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 16:39:03,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-21 16:39:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 16:39:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-21 16:39:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 16:39:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-21 16:39:03,046 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-21 16:39:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:03,046 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-21 16:39:03,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 16:39:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-21 16:39:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 16:39:03,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:03,048 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:03,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 16:39:03,049 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-21 16:39:03,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:03,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582509260] [2020-08-21 16:39:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 16:39:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 16:39:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:03,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582509260] [2020-08-21 16:39:03,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:03,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 16:39:03,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19286788] [2020-08-21 16:39:03,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 16:39:03,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 16:39:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 16:39:03,590 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-21 16:39:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:05,868 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-21 16:39:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 16:39:05,868 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 16:39:05,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:05,873 INFO L225 Difference]: With dead ends: 660 [2020-08-21 16:39:05,873 INFO L226 Difference]: Without dead ends: 610 [2020-08-21 16:39:05,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-21 16:39:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-21 16:39:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-21 16:39:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 16:39:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-21 16:39:05,898 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-21 16:39:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:05,899 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-21 16:39:05,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 16:39:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-21 16:39:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 16:39:05,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:05,901 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:05,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 16:39:05,901 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-21 16:39:05,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:05,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7758224] [2020-08-21 16:39:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:06,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:06,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 16:39:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:06,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 16:39:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:06,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7758224] [2020-08-21 16:39:06,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:06,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 16:39:06,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809045295] [2020-08-21 16:39:06,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 16:39:06,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 16:39:06,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 16:39:06,558 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-21 16:39:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:08,097 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-21 16:39:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 16:39:08,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-21 16:39:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:08,107 INFO L225 Difference]: With dead ends: 683 [2020-08-21 16:39:08,107 INFO L226 Difference]: Without dead ends: 633 [2020-08-21 16:39:08,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-21 16:39:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-21 16:39:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-21 16:39:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 16:39:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-21 16:39:08,118 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-21 16:39:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:08,118 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-21 16:39:08,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 16:39:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-21 16:39:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 16:39:08,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:08,119 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:08,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 16:39:08,120 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-21 16:39:08,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:08,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770756472] [2020-08-21 16:39:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:08,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:08,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 16:39:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 16:39:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:08,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770756472] [2020-08-21 16:39:08,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:08,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 16:39:08,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643948103] [2020-08-21 16:39:08,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 16:39:08,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:08,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 16:39:08,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 16:39:08,571 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-21 16:39:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:10,424 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-21 16:39:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 16:39:10,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-21 16:39:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:10,428 INFO L225 Difference]: With dead ends: 706 [2020-08-21 16:39:10,428 INFO L226 Difference]: Without dead ends: 656 [2020-08-21 16:39:10,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-21 16:39:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-21 16:39:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-21 16:39:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 16:39:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-21 16:39:10,441 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-21 16:39:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:10,442 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-21 16:39:10,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 16:39:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-21 16:39:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 16:39:10,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:10,443 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:10,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 16:39:10,443 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:10,444 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-21 16:39:10,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:10,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702051337] [2020-08-21 16:39:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:10,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:10,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 16:39:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:10,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 16:39:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:10,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702051337] [2020-08-21 16:39:10,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:10,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 16:39:10,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835491604] [2020-08-21 16:39:10,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 16:39:10,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 16:39:10,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 16:39:10,944 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-21 16:39:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:12,863 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-21 16:39:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 16:39:12,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-21 16:39:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:12,867 INFO L225 Difference]: With dead ends: 729 [2020-08-21 16:39:12,867 INFO L226 Difference]: Without dead ends: 679 [2020-08-21 16:39:12,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 16:39:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-21 16:39:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-21 16:39:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 16:39:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-21 16:39:12,877 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-21 16:39:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:12,877 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-21 16:39:12,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 16:39:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-21 16:39:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 16:39:12,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:12,879 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:12,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 16:39:12,879 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:12,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-21 16:39:12,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:12,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770629177] [2020-08-21 16:39:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:13,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:13,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 16:39:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:13,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 16:39:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:13,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770629177] [2020-08-21 16:39:13,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:13,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 16:39:13,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774438726] [2020-08-21 16:39:13,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 16:39:13,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:13,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 16:39:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 16:39:13,393 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-21 16:39:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:15,103 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-21 16:39:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 16:39:15,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-21 16:39:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:15,107 INFO L225 Difference]: With dead ends: 752 [2020-08-21 16:39:15,107 INFO L226 Difference]: Without dead ends: 702 [2020-08-21 16:39:15,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 16:39:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-21 16:39:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-21 16:39:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 16:39:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-21 16:39:15,117 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-21 16:39:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:15,118 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-21 16:39:15,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 16:39:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-21 16:39:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 16:39:15,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:15,119 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:15,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 16:39:15,119 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:15,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-21 16:39:15,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:15,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215061925] [2020-08-21 16:39:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 16:39:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 16:39:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 16:39:15,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215061925] [2020-08-21 16:39:15,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:15,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:15,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151771322] [2020-08-21 16:39:15,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:15,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:15,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:15,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:15,182 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-21 16:39:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:15,303 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-21 16:39:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:39:15,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-21 16:39:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:15,304 INFO L225 Difference]: With dead ends: 177 [2020-08-21 16:39:15,304 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 16:39:15,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:39:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 16:39:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-21 16:39:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 16:39:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-21 16:39:15,309 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-21 16:39:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:15,310 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-21 16:39:15,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-21 16:39:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 16:39:15,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:15,311 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:15,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 16:39:15,311 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-21 16:39:15,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:15,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579141174] [2020-08-21 16:39:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 16:39:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 16:39:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 16:39:15,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579141174] [2020-08-21 16:39:15,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:15,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:39:15,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032496654] [2020-08-21 16:39:15,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:39:15,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:39:15,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:39:15,390 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-21 16:39:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:15,565 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-21 16:39:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:39:15,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-21 16:39:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:15,566 INFO L225 Difference]: With dead ends: 200 [2020-08-21 16:39:15,566 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 16:39:15,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 16:39:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-21 16:39:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 16:39:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-21 16:39:15,572 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-21 16:39:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:15,572 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-21 16:39:15,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:39:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-21 16:39:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 16:39:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:15,573 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:15,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 16:39:15,574 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-21 16:39:15,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:15,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838037545] [2020-08-21 16:39:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 16:39:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 16:39:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 16:39:15,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838037545] [2020-08-21 16:39:15,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:15,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 16:39:15,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952466178] [2020-08-21 16:39:15,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:39:15,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:39:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:39:15,703 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-21 16:39:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:15,831 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-21 16:39:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:39:15,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-21 16:39:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:15,833 INFO L225 Difference]: With dead ends: 187 [2020-08-21 16:39:15,833 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 16:39:15,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:39:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 16:39:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-21 16:39:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 16:39:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-21 16:39:15,841 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-21 16:39:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:15,841 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-21 16:39:15,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:39:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-21 16:39:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 16:39:15,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:15,843 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:15,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 16:39:15,843 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:15,843 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-21 16:39:15,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:15,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460426409] [2020-08-21 16:39:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 16:39:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 16:39:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 16:39:15,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460426409] [2020-08-21 16:39:15,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:15,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:39:15,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925133659] [2020-08-21 16:39:15,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:39:15,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:15,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:39:15,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:15,931 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-21 16:39:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:16,053 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-21 16:39:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:39:16,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-21 16:39:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:16,054 INFO L225 Difference]: With dead ends: 157 [2020-08-21 16:39:16,054 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:39:16,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:39:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:39:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:39:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:39:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:39:16,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-21 16:39:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:16,059 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:39:16,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:39:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:39:16,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:39:16,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 16:39:16,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:39:16,287 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 16:39:16,287 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 16:39:16,287 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-21 16:39:16,287 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-21 16:39:16,287 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-21 16:39:16,287 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-21 16:39:16,287 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-21 16:39:16,287 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:39:16,288 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 16:39:16,288 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:39:16,288 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-21 16:39:16,288 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-21 16:39:16,288 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-21 16:39:16,288 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:39:16,288 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:39:16,288 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:39:16,288 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:39:16,289 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-21 16:39:16,289 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-21 16:39:16,289 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-21 16:39:16,289 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-21 16:39:16,289 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 16:39:16,289 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-21 16:39:16,289 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 16:39:16,289 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-21 16:39:16,289 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-21 16:39:16,290 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 16:39:16,290 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-21 16:39:16,290 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-21 16:39:16,290 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-21 16:39:16,290 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-21 16:39:16,290 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-21 16:39:16,290 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-21 16:39:16,290 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-21 16:39:16,291 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-21 16:39:16,291 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-21 16:39:16,291 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-21 16:39:16,291 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-21 16:39:16,291 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-21 16:39:16,291 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-21 16:39:16,291 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-21 16:39:16,291 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-21 16:39:16,292 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 16:39:16,292 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-21 16:39:16,292 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 16:39:16,292 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-21 16:39:16,292 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-21 16:39:16,292 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-21 16:39:16,293 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-21 16:39:16,293 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 16:39:16,293 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-21 16:39:16,293 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-21 16:39:16,293 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-21 16:39:16,293 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-21 16:39:16,293 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-21 16:39:16,293 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-21 16:39:16,294 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-21 16:39:16,294 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-21 16:39:16,294 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-21 16:39:16,294 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-21 16:39:16,294 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-21 16:39:16,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:16 BoogieIcfgContainer [2020-08-21 16:39:16,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:16,317 INFO L168 Benchmark]: Toolchain (without parser) took 37376.32 ms. Allocated memory was 140.5 MB in the beginning and 478.7 MB in the end (delta: 338.2 MB). Free memory was 102.1 MB in the beginning and 107.8 MB in the end (delta: -5.7 MB). Peak memory consumption was 332.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:16,317 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:39:16,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 425.13 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 101.9 MB in the beginning and 180.8 MB in the end (delta: -79.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:16,318 INFO L168 Benchmark]: Boogie Preprocessor took 62.10 ms. Allocated memory is still 202.9 MB. Free memory was 180.8 MB in the beginning and 178.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:16,319 INFO L168 Benchmark]: RCFGBuilder took 436.86 ms. Allocated memory is still 202.9 MB. Free memory was 178.9 MB in the beginning and 156.0 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:16,319 INFO L168 Benchmark]: TraceAbstraction took 36447.49 ms. Allocated memory was 202.9 MB in the beginning and 478.7 MB in the end (delta: 275.8 MB). Free memory was 155.3 MB in the beginning and 107.8 MB in the end (delta: 47.6 MB). Peak memory consumption was 323.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:16,321 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 425.13 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 101.9 MB in the beginning and 180.8 MB in the end (delta: -79.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.10 ms. Allocated memory is still 202.9 MB. Free memory was 180.8 MB in the beginning and 178.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 436.86 ms. Allocated memory is still 202.9 MB. Free memory was 178.9 MB in the beginning and 156.0 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36447.49 ms. Allocated memory was 202.9 MB in the beginning and 478.7 MB in the end (delta: 275.8 MB). Free memory was 155.3 MB in the beginning and 107.8 MB in the end (delta: 47.6 MB). Peak memory consumption was 323.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.1s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 27.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, 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, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 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...